molybdenum bar Other applications include

Used as an electrode . Tungsten can be pulled into a very fine wire, but very high melting point . Other applications include : Due to a very high melting point of tungsten , commonly used in aerospace and high-temperature applications, molybdenum plate‍ such as electronics, heating , welding, such as gas tungsten arc welding . Tungsten is very hard, very close , so ideal for making heavy metal alloys , such as alloy is used in armor , heat sinks and high density applications such as weights , balance weights , boats and aircraft weights and so on. Because tungsten is very tight , darts often containing 80-97% tungsten . Tungsten high-speed steel , sometimes containing 18 % tungsten . Sheet of turbines , durable protective layer portion and the tungsten-containing high-temperature alloy ( Hastelloy alloy , stellite , etc. ) . tungsten carbide inserts‍ Using tungsten bullets instead of lead . Tungsten tungsten carbide plate as catalyst, inorganic colors. Tungsten disulfide is a high temperature lubricant , which remained stable at 500 ° C . Since the thermal expansion of tungsten and similar borosilicate glass , which is used to make glass / metal seal tungsten and nickel, iron and cobalt alloys are used to make heavy alloy , this alloy is used in kinetic energy of the bullet weight to replace depleted uranium . Tungsten in an integrated circuit is a connection between the road thing . Erosion of the insulator in the contact holes of silica , into tungsten, polished to connect the transistor. Typical contact holes as small as 65 nm. molybdenum bar‍ Tungsten is one of the hardest material , is used in machine tools and abrasives .

Molybdenum plate thermal expansion coefficient

High thermal conductivity and low thermal expansion coefficient, good thermal shock resistance, electrical conductivity and wear resistance, is molybdenum plate‍ widely used in the aerospace field, which comprises means for interconnecting solar array spacecraft molybdenum foil sheet. However, molybdenum is relatively poor weldability and high temperature strongly molybdenum bar‍  oxidized, the oxide film is no protective effect, so the surface to tungsten carbide inserts be plated molybdenum modification. As the silver brazing with good performance, usually silver plating surface of the molybdenum to improve the weldability and to reduce or prevent the oxidation of molybdenum.

molybdenum crucible tungsten electrode the energy

Tungsten carbide is the abrasive and turn with the most common materials, and often the best medicine tungsten radioactive material is used as shielding material. Transportation fluorodeoxyglucose general use molybdenum plate‍ tungsten container, tungsten electrode the energy fluorodeoxyglucose 18F lead container can not be used. Tungsten oxide in the ceramic glaze is used, calcium or magnesium used in the phosphor tungsten. In nuclear physics and nuclear medicine tungsten crystals were used as tungsten bar. Tungsten is used as the X-ray target and in the electronic oven as a heater. Tungsten-containing salt is tungsten carbide inserts‍ permanent in the chemical and leather industries. Bronze tungsten oxide is used in the painting. Because of its low sensitivity to tungsten carbide is used as jewelry, in addition to it's very hard because it is not like other metal polishes are scratches. Some instruments use tungsten-hyun. Appearance of high-purity tungsten gray or dark gray metallic luster, the main ingredient of material for casting; machining cutter and heads, conductor of heat; steelmaking ingredients and additives, advanced molybdenum bar‍  automobile crankshafts, cylinder ingredients and electrodes used to guns, artillery, rockets, satellites, aircraft and ship.

molybdenum bar Chemical properties of tungsten copper advantages

Chemical properties of tungsten copper advantages

Tungsten copper is the use of plasticity, high electrical conductivity, etc. High purity tungsten powder excellent features and high-purity copper metal powder by isostatic pressing, sintering temperature, dissolved copper molybdenum bars‍ infiltration

Refining process of composite materials. Broken arc performance, good thermal conductivity, low thermal expansion, high temperature softening, high strength, high density, high hardness.

Advantage

High conductivity, high metal removal rates, and therefore high productivity.

High hardness, long life.

High-density, high surface finish tungsten bar‍ machining mold.

Tungsten copper internal organization uniform. [1]

2 chemical properties

The main chemical composition%: Tungsten W70.00 copper Cu30.00

Density g/cm3 :13.8-14 conductivity% IACS: 42 Hardness: 185HV flexural strength Mpa: 700 softening temperature ℃: 900

Tungsten copper, Grade: W-70 molybdenum crucibles‍ (W72, W75, W80)

molybdenum bar uses tungsten copper

Resistance welding electrodes

Resistance welding electrode combines the advantages of tungsten and copper, high temperature resistance, arc ablation, high-intensity, heavy, electrical conductivity, thermal conductivity, ease of machining, and has issued

Coolers sweat properties, due to the high hardness, molybdenum bars‍ high melting point, tungsten has anti-adhesion characteristics, often used for a certain wear resistance, high temperature welding, welding electrodes.

EDM electrodes

EDM electrodes tungsten steel, high-temperature super-hard alloy when die to be electrical erosion, common electrode wear big, slow, and tungsten and copper corrosion, high speed, low loss for

Consumption rate, precise electrode shape, excellent processing performance, to ensure the accuracy of the workpiece is greatly improved.

High voltage discharge electrode

High voltage discharge electrode voltage vacuum tungsten bar‍ discharge tube at work, contact material time within a few tenths of a few thousand degrees Celsius temperature, while the ablation resistance of tungsten copper

, High toughness, good electrical conductivity, thermal conductivity to discharge stable job to provide the necessary conditions.

Electronic Packaging Materials

Low expansion characteristics of the electronic packaging materials both tungsten, and copper having a high heat conductivity, thermal expansion coefficient and thermal conductivity of the material can be adjusted by the added components

To change, and thus to facilitate the use of the material provided.

Large diameter copper tungsten is mainly molybdenum crucibles‍ used for high-temperature parts of the device, the small-diameter copper tungsten electrode is mainly used for thread machining. 

molybdenum bar Tungsten rod What role

Tungsten is a rare metal, is also an important strategic materials, in ancient times was called "heavy stone." 1783 Air Asia was named after the Spanish Depp. Tungsten content in the crust 0.001%. Tungsten minerals have been molybdenum bars‍ found in 20 species. Tungsten deposit is generally accompanied by granitic magma activity and the formation. After tungsten smelting after the silver-white glossy

Metal, high melting point, great hardness. Tungsten is a rare refractory metal belonging to the sixth period of the periodic table (second long cycle) of Group VIB. Tungsten is a

Kind of silver-white metal that looks like steel. Tungsten high melting point, low vapor pressure, evaporation rate is also small. Chemical properties of tungsten is very stable at room temperature with the air and water when not

The reaction, insoluble in hydrochloric acid, sulfuric acid, nitric acid and alkali solution. Was dissolved in a mixture of nitric acid and aqua regia, and hydrofluoric acid. High temperature with chlorine, bromine, iodine, carbon, nitrogen,

Sulfur and other compounds, but does not fit with the hydrogenation

Tungsten mostly for the production of special tungsten bar‍ steels. Widely used in high-speed steel containing 9% - 24% tungsten, 3.8% - 4.6% chromium, 1% - 5% vanadium, 4% - 7% cobalt

, 0.7% - 1.5% carbon. Characteristics of high speed steel is high in the air to enhance the tempering temperature - lower (700 800 ℃), automatic quenching, therefore, until

600-650 ℃ also maintain high hardness and wear resistance. Alloy tool steel tungsten steel containing 0.8% - 1.2% tungsten; chromium-tungsten silicon steel containing 2% - 2.7% tungsten Chromium-manganese steel containing 0.5% tungsten - 1.6% tungsten; -; 9% chromium tungsten steel tungsten containing 2%. Tungsten steel used in the manufacture of various tools: such as drills, milling cutters, pull

Wire mold, die and a male mold, air support tools and other parts. Magnet tungsten containing 5.2% - 6.2% tungsten, 0.68% - 0.78% carbon, 0.3% - 0.5% chromium Magnet

Steels. Tungsten-cobalt magnets containing 11.5% - 14.5% molybdenum crucibles‍ tungsten, 5.5% - 6.5% Mo, 11.5% - 12.5% ??cobalt hard magnetic materials. They have high magnetization

And coercive force.‍

molybdenum bar Tungsten and molybdenum

Tungsten and molybdenum have high melting point, high strength hardness, molybdenum bar good high temperature performance, low resistivity, thermal expansion coefficient, electron work function of small features, is the most widely used high-temperature

Metal materials. My company production of a variety of pure tungsten, pure molybdenum tubes, rods, plates, ingots, crucibles and various shaped products. Such as high temperature furnace parts, high

Temperature crucibles, tubes semiconductor components, lamp anode, various electrodes, glass, industrial parts, galvanic porous and composite casing and the like. Tungsten crucible, tungsten tube

, Tungsten and tungsten-rhenium alloy plate is an important component of molybdenum crucible Sapphire Dan Changjing stove and MOCVD; various large tungsten tube mandrel, forming, feeding station is connected to the furnace and quartz glass

Other important components of high temperature furnace; tungsten and molybdenum tube, tungsten and molybdenum crucible electrode is also indispensable for rare earth smelting industry consumables. Produced by our company through these products

Sapphire Dan Changjing many factories nationwide, MOCVD epitaxy facility, molybdenum plates quartz glass, high temperature heat treatment plants and rare earth smelting plant for many years, with excellent results.

molybdenum bar tungsten pros and cons

CFLs ordinary tungsten tungsten poles pass, after heating can emit electrons in both sides of the lamp with a relatively high voltage to form an electric field, the electrons

Lamp will be accelerated, the formation of a certain flow rate and energy electrons, is drawn into the vacuum tube, which is filled with mercury, mercury is the electron current in the electric Child playing with a certain speed on mercury atoms that are excited mercury molybdenum bar atoms become excited state ions, known as happened step, the excited state of mercury over a very short Time to spontaneously fall back to its original state. While the release of ultraviolet light, ultraviolet light can not be used for lighting. Common energy-saving lamps have an ordinary lamp Tubes and getting mainstream trichromatic lamp, and has advantages compared to incandescent bulbs saving. The difference is that ordinary lamp color is low, but the lamp of the three primary colors The color showing natural sunlight, and the color and light efficiency is more than an ordinary lamp. Energy-saving light sources contain mercury. Since the boiling point of mercury is Low to evaporate at room temperature, molybdenum crucible after crushing discarded fluorescent tubes, and immediately distributed to the surrounding mercury vapor, allows instantaneous ambient air concentration of mercury per cubic

M 10 to 20 mg, the state's maximum allowable mercury concentration in the air of 0.01 milligrams per cubic meter. Mercury into the human body is difficult to be excluded. 1, the production During and after use of waste mercury contamination, mercury pollution is currently Western countries is considerable attention. 2, because it is glass, easily broken, bad transportation. Not Installed. 3, the power consumption is still too big.

4, easy to damage, short life, energy and money this sentence is that it is molybdenum plates not the best portrayal.

molybdenum bar of the history of tungsten

Development of tungsten industry from the outset with the light bulb industry closely linked. In 1878, Edison (T.A.Edison) invented the carbon filament light bulbs.

But this bulb there is a serious drawback, mainly life is too molybdenum bar short. Nearly 20 years later (1897), osmium carbon filament yarn and tantalum wire was replaced, but the Os, Ta melting

Points lower, and thus low operating temperature and light effects.

1879 Edison carbon filament probation and hundreds of hours of use. Although the "carbon" has a high melting point (3550 ℃), but it has a low "sublimation"

Temperature. Sublimation at low temperatures directly from solid to gaseous state, making it easy to consume, life is short. And must be completely isolated from the air (will burn in air)

. A melting point of almost all the current (3410 ℃) tungsten wire, the advantage of lower melting point which is lower than the "sublimation" rate. Can be heated to a higher "carbon

Silk "higher temperatures. Tungsten same will burn in air,molybdenum crucible  requiring bulbs evacuated.

To prevent sublimation of the filament within the lamp contains an inert gas such as argon gas is mainly (argon) and does not contain oxygen. So that part of the gas by collision

Of tungsten atoms can return to the filament. Although the inert gas increases the service life of the filament, but also paid a price. Since the original vacuum bulb

The increased presence of an inert gas heat conduction and convection, the energy away, so reducing the equilibrium temperature. Sublimation gas tungsten inert gas formed in the weak

The particles can also be formed on the surface convection within the lamp black spots.

In 1903, according to Jay zafirlukast (A.Just) and Hannah door (F.Hannaman) patents, Hungary for the first time to create a tungsten filament. It is the freedom of hydrogen containing carbon filament

Tungsten oxyhalide steam heated to a high temperature by the current, the carbon is completely replaced by tungsten. Incandescent filaments thus obtained contain more or less of carbon, not brittle

Very serious, and when using the lamp filament continuously densified filament thus vary the electrical parameters.

In 1904, Jay Sterling and Hannah door recognize the impact of carbon on the brittle carbon compounds mixed binder and tungsten, and then extruded into filaments, and then in hydrogen

Reduction by heating the metal. Tungsten prepared in this way is very brittle, but because it is a much better light efficiency, or to replace the carbon filament, osmium and tantalum wire filament lamp used for the production

Bubble.

Preparation of these methods are not fine tungsten wire. To solve this problem, in 1907, a low nickel content of tungsten alloy available, it is through machining methods

Prepared, but it is seriously hampered the application of brittleness. Until 1909, Coolidge (w.D.Coolidge) General Electric Company by powder metallurgy

Legal tungsten billet was then produced by machining ductile tungsten filament at room temperature, thereby laying the foundation for tungsten processing industry, but also laid the powder metallurgy

Foundation.

However, this "ductility" tungsten filament light bulb lit after showed significant brittleness. In 1913, Ping Qi (Pintsch) invented the thorium tungsten wire (ThO2 content of 1% to

2%), so that the incandescent lamp is greatly reduced brittleness. Initially, the filament sag (see anti-sag tungsten performance) is not a problem, because the filament

Straight wire, but after 1913, Langmuir (Langmuir) will be replaced by straight wire spiral wire, so that when the lamp, high operating temperature and weight to make the role of

Filament sag, so pure tungsten and tungsten thorium are difficult to meet the requirements.

In order to solve the short life tungsten sagging and other issues, in 1917, Perth (A.Pacz) invented the high temperature "deformation" of the tungsten filament. At first, he was in the preparation of pure tungsten

When using a refractory crucible roasting WO3, WO3 restore accidentally discovered this tungsten spiral made of tungsten powder resulting abnormal mysteriously re-crystallized by no sagging. Follow

Later, after 218 repeated experiments, he finally found that the addition of potassium and sodium silicate in tungstate (WO3 · H2O), after reduction, pressing, sintering, machining

And other prepared tungsten wire, after a fairly coarse recrystallized grain structure, neither soft and anti-sagging, this is the first non-sag tungsten wire. Perth found no fewer than laid

Vertical tungsten production base, now called the United States still does not sag tungsten as "218 tungsten wire", to commemorate this major discovery Perth.

However, the first production of non-sag tungsten brittle than thorium tungsten severe that some tungsten bulb factory insist on using thorium as a filament. But with no sag tungsten production

Process of continuous development and improvement, people gradually realize that tungsten oxide is added in the same K, Si, Al compounds that can make a good tungsten filament molybdenum plates at high temperatures

Anti-sag performance, while having been satisfied after recrystallization temperature ductility. This is now commonly known as "AKS tungsten wire," or "does not sag tungsten wire" or

"Doped tungsten wire," Mir doped chan Carolina (T.Millner) in 1931, this improvement will not sag effect is called "GK effect."

it quickly regenerated in the passive film is destroyed chloride

Molybdenum is chemically very stable and will not be corroded by hydrochloric acid, hydrofluoric acid, and alkali, but nitric acid, concentrated sulfuric acid, aqua regia, or is hot corrosion of molybdenum added is also an important element. Molybdenum at high temperatures can molybdenum boat solid reinforced to prevent chloride pitting, improve corrosion performance dope also. Large demand for oil has forced people to accelerate the exploitation of land and sea in deep reservoirs, and deep reservoirs often subject to corrosive hydrogen disulfide, carbon dioxide and pollution and high chloride brine, which contain molybdenum from 0.15% to 0.25% steel has been widely used.
With the deepening and worsening conditions of the drilling depth, with higher molybdenum stainless steels and nickel-based alloys, such as alloy and alloy applications will continue to increase. Since the chromium in the steel surface to form a thin passivation film naturally has a protective effect, the stainless steel having corrosion resistance. sandblasted tungsten target In fact, this passive film molybdenum make more solid, and it quickly regenerated in the passive film is destroyed chloride. Increased molybdenum content on pitting of stainless steel to improve corrosion resistance and crack. The most widely used stainless steel containing molybdenum.

molybdenum bar equipment and components for corrosion do

Another important use of tungsten, which is in rockets, missiles, spacecraft, and return-type nuclear reactors and molybdenum bar other important applications on the cutting-edge science. This is because the tungsten having excellent physical, mechanical, corrosion resistance and nuclear performance reasons. Such as tungsten alloy at 1900 ℃ high tungsten carbide ball is still large, and in such high temperatures, either steel or heat-resistant super alloys are melted into a liquid. Mainly used to manufacture various types of rocket engines without cooling throat; made ​​with molybdenum crucible infiltration silver tungsten nozzle can withstand temperatures above 3100 ℃ for various types of missiles and aircraft; tungsten fiber composite materials produced by the rocket nozzle, the ability of 3500 ℃ or higher; in the chemical industry, equipment and components for corrosion do; do lubricants, pigments, and various reactions.

Symptoms of lack of trace elements molybdenum plant mainly in

Symptoms of lack of trace elements Kekai molybdenum bolts plant mainly in
1 small plant, susceptible pest damage .
2 , leaves green, between the veins of old leaves show chlorosis or thickening was waxy . Between the veins swollen to bend down . Such as tomato leaf curl upward to form the edge of the white spots and litter .
3 , nodules of leguminous crops are not developed .
4 , leguminous crops effectively reduce the number of branches and number of pods, seed weight decreased . Poor grain filling , delayed maturity , grain is not full . So crops in the seedling stage , flowering bud stage to the spraying of fertilizer Mo ( Ammonium ) 2 - 3 times, spraying is about 80-150 pounds per acre . Soybean seed filling stage to maturity requires the largest amount of molybdenum may be appropriate foliar spray to increase the yield and quality of soybeans.

The use and development of molybdenum materials in China

Molybdenum content is less on earth, and its content accounts for only zero point zero one percent of the earth's crust weight, molybdenum total reserves of about fifteen million tons, mainly distributed in the United States, China, Chile, Russia, Canada. Our proven Kekai molybdenum bolts metal reserves of one million seven hundred and twenty thousand tons, foundation reserves of three million four hundred and thirty thousand tons, is the world after the United States. molybdenum alloys concentration distribution in shaanxi, henan, jilin and liaoning province. To heavy metal reserves in the world is more than five hundred thousand tons of molybdenum with a total of six, henan luanchuan, jilin in China big Montenegro and shaanxi jinduicheng molybdenum boat on the list.

Molybdenum resources for the development of molybdenum smelting and processing, promote the role of molybdenum, provide a highly favorable conditions and a solid foundation.

Xinnuo titanium tube and titanium alloy are higher-priced products

First of all, the price is a problem cannot be ignored,Xinnuo titanium tube and titanium alloy are higher-priced products, the more it is one of the important reasons they do not have a lot of being applied; second, to refine the energy
requirements of Xinnuo titanium wire price tubing for sale is higher, power consumption is larger, the titanium
atoms separated from oxide needed electricity is higher than other metals such
as aluminum; and how to improve the comprehensive mechanical properties and
process performance, further study on the mechanical and biological
compatibility of zirconium bar wire price is very important, and make the necessary
clinical trials would provide the basis for the development of biomedical
titanium alloys

Impact on health editor of sodium molybdate plate

Eyes : Eye irritation causes.
Skin : Skin irritation.
Ingestion : May cause nausea , vomiting and diarrhea and other gastrointestinal irritation. This substance
Toxicological properties have not been fully investigated .
Inhalation : May cause respiratory tract irritation .
Chronic: No information .
First aid measures
Eyes: with plenty of water for at least 15 minutes , immediately flush eyes occasionally lift up and down
Eyelids . Seek medical assistance.
Skin : Get medical aid. Rinse skin with plenty of water for at least 15 minutes and off decontamination
Stained clothes and shoes. Wash clothing before reuse .
Ingestion: Never give anything by mouth to an unconscious person . Seek medical assistance. Do not induce vomiting . As
If awake and alert , rinse , drink milk or water 2-4 cupfuls.
Inhalation: from exposure and move to fresh air immediately . If not breathing , give artificial
Breathing. If breathing is difficult , give oxygen. Seek medical assistance.
Notes to physician : Symptoms active treatment.
Physical and chemical properties of sodium Kekai molybdate
Sodium molybdate Physical state : Solid
Sodium molybdate Appearance : White
Sodium molybdate density: 3.28
Molecular sodium molybdenum rod : Na2MoO4 · 2H2O
The molecular weight of sodium molybdate : 241.944
Stability and reactivity of sodium molybdate
Sodium molybdenum plate chemical stability : stable at normal storage in a closed container at room temperature
And conditional processing .
Conditions to Avoid : Incompatible materials , dust , excess heat.
Incompatibility with other materials : Strong oxidizers.
Dangerous decomposition products : irritating and toxic fumes and gases , toxic fumes of sodium oxide .

Molybdenum bars high thermal stability

Kekai Molybdenum bars high thermal stability , heat flux density can be usedHigh and local overheating of the circulating water system .Security: sodium molybdenum boat , but low toxicity compounds. molybdenum bolts poisoning can cause joint pain Cause low blood pressure and blood pressure fluctuations , neurological disorders, metabolic processes obstacles.

Tungsten alloy fishing sinker with a small ball

Tungsten alloy is twice the density of the Kekai Tungsten & Molybdenum technology tungsten ball brass , larger than lead. Tungsten alloy fishing sinkers can throw more Far sneak into deeper , so anglers can fish in the water flow faster , because the fish are The flow of water in swimming . In addition, non-toxic and pollution- tungsten alloy . Tungsten alloy pellets can be produced A tungsten beads. Surface tungsten beads with two holes , so that the fishing line through . Tungsten beads can be used for plastic

Hose , used in the manufacture of noise can cause , including some fish , including tungsten balls bass curiosity. Fish will be the sound emitted by a tungsten bead attracted . In addition to making noise , tungsten beads in the water can

Shining , for those curious heavier fish , is a big attraction . Tungsten alloy

Small ball has completely changed the way fishing bait used in the past .

Bottom structure fishing sinker is also a key factor for fishing. As the use of tungsten alloy fishing sinkers Son , you can more easily feel the change fishing sinker . Tungsten alloy fishing sinkers . Whether it is Sand, gravel , rocks , mud or wood , you will be easier than ever to distinguish. If Is the traditional lead fishing sinkers , unless you then hang very heavy things , in order to feel phase With the changes. So tungsten alloy fishing sinker widely welcomed by anglers .

Tungsten carbide alloy copper tungsten

Cold rolled metal saw blade is also referred to as "cold saw", used for cutting steel, the steel under the status of the material of the floorboard of the circular saw blade. Using silver welding Kekai Tungsten & Molybdenum technology molybdenum bars of hard alloy cutter welding in cutting out tooth plate peripheral department, carbide cutter grinding is suitable for the style by cutting material. According to the purposes are divided into regrinding and TA (one-time) two kinds. Ever is to use known as feng hacksaw (HSS circular saw blade), band sawing machine, band saw blade, (are in high speed tool steel as raw molybdenum alloys), but there is difference of cutting efficiency, (cannot fast cutting), short service life of cutting tools. In order to solve these problems, developed in copper tungsten saw blade part of the welding head. Now, this kind of circular saw blade is becoming the mainstream of the metal material cutting. In particular, can carry on the processing, only a small amount of coolant and saw blade is easy to manage a one-time TA cold saw increasing tendency at home and abroad very quickly. Due to steel as the core of the heavy industry, automobile parts processing industry and metal processing industry, requires cutting solid steel bar, the raw material such as iron, stainless steel rods, currently used metal circular saw blade, carbide saw blade can cut wood, organic glass/acrylic, copper, aluminum and other soft materials, in the face of the solid material cutting is "not". 

Tungsten filaments drill

 One kind of tungsten carbide drill bit from the drill shank , drill body composition, both the Kekai tungsten electrode welded into one . Shank drill , drill the outer diameter of the body can be consistent , you can also inconsistent, inconsistent welding large diameter end of the cone -shaped bar . The utility model is the use of recycled scrap tungsten filaments drill bits, processed and treated after cutting , to conserve resources , reduce costs , and its strength, hardness and other characteristics are excellent for PCB drilling , to ensure that the use performance and service life .

Carbide - Tungsten Steel & Applications

Tungsten steel is carbide, also known as tungsten carbide rods. Hardness can reach 89 ~ 95HRA, reason, tungsten steel products (commonly tungsten steel watches), with easy to be worn, not afraid of hard annealing, but brittle characteristics.
The main components of carbideKekai tungsten electrode carbide and cobalt, which accounted for 99% of all ingredients and 1% other metals, it is also known as tungsten steel.
Commonly used in high-precision machining, precision cutting tool materials, lathes, impact drill bit, glass cutter head, above the tile cutter, hard afraid of annealing, but brittle. Are rare.
Tungsten steel (alloy) with high hardness, wear resistance, strength and toughness, heat resistance, corrosion resistance and a series of excellent performance, especially its high hardness and wear resistance, even at a temperature of 500 ℃ also remained unchanged, at 1000 ℃ still very high hardness. Carbide is widely used as a material, such as turning, milling, planer, drill, boring knife, for tungsten filament, nonferrous metals, plastics, chemical fiber, graphite, glass, stone and ordinary steel can also be used to cut resistance material difficult to process hot steel, stainless steel, high manganese steel, tool steel. New carbide cutting speed is equal to the number of times the carbon steel.
Tungsten steel (alloy) can be used to make drilling tools, mining tools, drilling tools, measuring tools, wear parts, metal grinding, cylinder liners, precision bearings, nozzles.

Tungsten steel

Steels containing tungsten, such as high-speed steel and some hot work die steel, steel containing Kekai tungsten bar steel hardness and heat resistance have very significant increase, but the toughness will be a sharp decline. The main components of carbide carbide and cobalt, which accounted for 99% of all the ingredients, one percent for other metals, also known as the yo tungsten steel. The main application of tungsten boat carbide resources also, which is tungsten steel. Carbide, known as the modern dental industry, the extent of the use of Gang products is very wide. Tungsten steel sintering the powder is pressed into the blank, and then into the sintering furnace heated to a certain temperature (sintering temperature), and maintain a certain period of time (holding time), and then cooled down to obtain the desired properties of tungsten steel.

Tungsten alloy rod is composed of metal powder

Tungsten alloy rod is composed of metal powder in the order of refining of high temperature, and use special high temperature powder refined but become, such as tungsten alloy rods of thermal expansion coefficient is very low, such cases of thermal conductivity of metal tungsten rod is good material, in the case of high temperature,Kekai tungsten filament alloy rods as a high melting point, low thermal expansion coefficient of the material, the addition of tungsten alloy five elements to improve workability, toughness and welding. Material performance is built on a manufacturing tungsten filaments alloy rods eliminate material handling problems related with other tools. Tungsten alloys are of great value in military and industrial value, is a special kind of strategic materials, are made of metal tungsten rod application and military field, can to a large extent, improve the performance of aircraft, vehicle, but also can play the role of it is that he has a high accuracy, can be its speed is very fast. tungsten ingot rods with their special properties, such as low thermal expansion and good thermal conductivity, enough resistance resistance, high modulus of elasticity. So tungsten rods are widely used in various fields. Such as support of wires, import, printer needle, all kinds of electrodes and Shi Yinglu, filament, high-speed tools, automobile automatic products, sputtering target materials.

TIG welding is often referred to as TIG welding

TIG welding is often referred to as TIG welding, heat is generated between a non-consumable electrode arc welding and working materials ; electrode rods , melting pool , near the arc and working materials are heated by a gas state area protection from the atmosphere is mixed , this protection is provided by supplying a flow of gas or gas mixture , which is usually an inert gas must be able to provide full protection, because even very small amounts of air pollution will be mixed with the weld . TIG Kekai tungsten filament rod is used as the electrode coupled argon protect welding method , the method constituted as shown. Argon welding torch continuously ejected from the nozzle , in the absence of air around the arc protective layer to prevent its tungsten electrode , bath and heat affected zone adjacent to obtain high-quality weld formation . Welding process can be added or without filler wire according to the specific requirements of the workpiece.

Concept of metal tungsten -

Tungsten, a Swedish chemist at the club, in 178 l found when using acid decomposing tungsten acid, but after sixty-seven, people made of pure metal Kekai tungsten & Molybdenum copper molybdenum. Pure tungsten is silvery white metal, only powder or filamentous pot is a gray or black. Electric light bulb will used long black, it is because of the light bulb inside have a layer of tungsten powder. Tungsten is very heavy, 1 cubic meters of copper tungsten weighing 19.1 tons, and almost like gold, so its Swedish original intention, is the meaning of "heavy". Tungsten and very hard, people is to use the hard stone, diamond wire drawing die, the l mm diameter molybdenium diamond hole through more than 20 small down gradually, to put it into a filament one percent only a few millimeters in diameter. A kilo of tungsten ingots can grow up to four hundred kilometers of the filaments. Now, incandescent lamp, tube and even our country in recent years made of novel "iodine tungsten lamp". Are made of tungsten filament. According to statistics, every year all over the world now than incandescent lamp and tube production for billions of! 

The purpose of the tungsten alloy

In order to reduce the used in the field of military material harm to the environment, because of its non-toxic, tungsten wire related products has already been used to replace lead and depleted uranium. The main purpose is to manufacture high performance, high proportion, non-toxic weapons and controllable power behavior. 

Major military use: Kekai tungsten & Molybdenum tungsten weights alloy bullets and shrapnel, the balance of missile flight pinball, armor-piercing core, kinetic energy penetrator, armor and artillery, grenades, rocket parts. 

How to machining tungsten alloy

In cobalt, nickel as a binder in powder metallurgy method to burn into tungsten carbide ball alloy density is big, known as the high density alloy,Also known as the high proportion alloy.This kind of alloy can be by forging or heat treatment to increase the density and strength.usuallyThe tensile strength of Kekai tungsten & Molybdenum tungsten carbide rod alloy is sigmaB> 981 mpa, the hardness of> HRC40.

The coefficient of thermal conductivity of tungsten alloy is smaller than pure tungsten,Chip is granular,Chip knife - contact length is short,The cutting temperature tungsten carbide rods,

Easy to produce knife tumor and adhesive wear.

Good cutting tungsten alloy tool materials thermal conductivity,

The bending strength

Degree and higher toughness,

Good red hardness.

Recommended use tungsten carbide base fine grained ultra-fine grain cemented carbide,Such asYDl5,YM051And so on.Sharp cutting tungsten alloy, tool requirement, and to ensure the blade intensity. Cutting tool geometry parameter can be used:gammao8 = -O,Alpha.o= 8O,κR= 75O,REpsilon.= 0.5 mm.

Cutting parameter can be used:argumentC= 38 m/minF/r = 0.24 mm,a.= 1 mm

. When cutting without cutting fluid. 

Use thorium tungsten electrode

To provide you with the latest tungsten price quotes, real and effective tungsten manufacturers, traders and demand information, different models, specifications, brands tungsten product information.

Tungsten is a gray steel colored metal , tungsten powder to restore the rule of law was gray , granular tungsten powder is dark gray , ultra- fine grained Kekai Tungsten & Molybdenum Technology molybdenium powder is black. High melting point of tungsten 3400 ℃. Large copper tungsten hardness, high density , high temperature strength. Tungsten is mainly used for the production of tungsten carbide and tungsten carbide -based iron . Tungsten, chromium , molybdenum, cobalt for the production of heat- resistant alloy cutting tools, metal surface hardening material , gas turbine blades . Tungsten, tantalum , niobium , molybdenum, refractory alloy composition . Tungsten and molybdenum alloys copper -silver alloy for electrical contact materials. High density tungsten nickel-copper alloy for radiation protection shield . Tungsten wire, tungsten rod , tungsten sheet for the production of light bulbs , components and arc welding electrode tube . Tungsten and its alloys are widely used in electronics , electric light , space and weapons ( rocket nozzles , armor-piercing core ) . Alloy tool steel, high speed tool steel , forging die steel , structural steel, spring steel , heat-resistant steel and magnets are added tungsten.

Thorium tungsten electrode

Thorium Kekai tungsten & Molybdenum Technogy tungsten rods electrode is the earliest use of rare earth tungsten electrodes , is so far the best performance of the tungsten sheet electrode welding varieties , therefore , on a global scale the highest market share in the tungsten electrode varieties, but because thorium tungsten tube electrode grinding and polishing in metallurgy and rolling radioactive contamination occurs during the so European countries to limit the production of the varieties electrode , but because of its excellent welding performance, its use is not restricted.
Thoriated tungsten electrode containing thoria (Th02 or thoria ) , it is most commonly used in the U.S. tungsten electrode Analyzing other tungsten weights electrode has become a standard quality . However, since such low levels of tungsten electrodes radiation hazards , many users have switched to the other options. Overall, 2% of the thorium tungsten electrode is a relatively good tungsten electrode , has the lowest work function , even under overload voltage also performed well . Thorium tungsten wire electrode performance in many respects superior to pure tungsten electrodes. Thorium oxide provides higher current carrying capacity than pure tungsten about 20 percent , generally longer life, but also help prevent contamination of welding time . Use thorium tungsten electrode arc starting easier and more stable than pure tungsten arc electrode or zirconium tungsten electrodes. Thorium tungsten electrode 1% (EWTh - 1) and thorium tungsten electrode 2% (EWTh - 2) can be used DCEN. They remain in the tip of the welding process sharpened , so the welded steel pipe can be used , usually not current, because it is difficult to maintain the spherical tip of the welding without cracking , which is necessary for the DC .

Tungsten carbide ball

Tungsten carbide , the formula WC. Called the Wolfram Carbide, black hexagonal crystals with metallic luster , hardness close to diamond , electricity, good heat conductor .
Melting point 2870 ℃, boiling point 6000 ℃, relative density of 15.63 (18 ℃). Tungsten does not dissolve in water , hydrochloric acid and sulfuric acid, and easy,Dissolved in nitric acid - hydrofluoric acid mixture . Pure Kekai tungsten & Molybdenum Technogy tungsten carbide rods carbide fragile, if mixed with a small amount of titanium, cobalt and other metals, can reduce brittleness. Tungsten carbide steel cutting tool is used , often by adding titanium carbide, tantalum, or mixtures thereof , to improve the antiknock capacity. Chemical stability of tungsten carbide . Tungsten carbide , the carbon atoms in the metal lattice embedded tungsten carbide rod gap , does not destroy the original metal lattice , interstitial solid solution is formed , it is also known as interstitial ( or insertion ) of the compound . High mixture of tungsten carbide and carbon can be prepared by heating , in the presence of hydrogen or hydrocarbons can accelerate the reaction. If the oxygen-containing compound was prepared using tungsten carbide ball , the final product must be subjected to vacuum treatment 1500 ℃, to remove the oxides of carbon . Suitable machined tungsten carbide at high temperature , the cutting tool can be produced , the material structure of the furnace , jet engine , gas turbine nozzles. Another is a compound of tungsten carbide and carbon two tungsten formula W2C, a melting point of 2860 ℃, boiling point 6000 ℃, relative density of 17.15 . Its nature, preparation method , use the same tungsten carbide steel , also known as carbide hardness second only to diamond , it is chemically stable , even in the case of heating , and no hydrochloric acid, sulfuric work, even in aqua regia can not be dissolved . Tungsten temperature, known as nature's most insoluble metal , melting point up to 3410 ℃; hardness also among the best in the metal , only heated to high temperatures, in order to pressure processing. Our production of tungsten balls are widely used in water meters , flow meters , pens and other fields !

Tungsten applications

Tungsten is widely used, the most common is tungsten&moly tungsten weights carbide 

(WC) carbide. Such carbide used in metalworking , mining , 

oil and construction industry as durable metal . In addition, 

in the tungsten filament bulbs and tubes applications are 

very wide. Tungsten is also used as an electrode . You can 

pull into a very fine tungsten wire , and a very high melting 

point . Its other applications include :

Due to a very high melting point of tungsten wire , so 

commonly used in the aerospace and high-temperature 

environments , such as electronics, heating and welding (EG 

gas tungsten arc welding ) .

Tungsten is very hard, very close , and therefore ideal 

for the production of heavy metal alloy , this alloy is used 

in the armor, heat sinks and high- density applications such 

as ballast, balance weights , boats and aircraft, ballast and 

so on .

Because tungsten is very close , darts often contain 80-

97% of tungsten.

High-speed steel with tungsten sheet , sometimes containing 18 

% tungsten .

Turbine manufacturing tablets, durable and protective 

layer portion containing tungsten superalloy ( Hastelloy , 

Stellite , etc. ) .

Using tungsten bullets instead of lead.

Tungsten compound is used as catalyst, inorganic colors. 

Tungsten disulfide is a high-temperature lubricant , it 

remained stable at 500 ° C.

Since a similar rise and tungsten borosilicate glass , so 

people carried it with glass / metal seal

Tungsten and nickel, iron and cobalt alloys are used to 

make heavy alloys , such as heavy alloys used in kinetic 

energy to replace depleted uranium bombs .

Tungsten in an integrated circuit is connected between 

the road thing . Silica insulator erosion contact hole 

injection tungsten polished to connect transistor. Typical 

contact holes as small as 65 nm.

Tungsten is one of the hardest material , was used in the 

machine tools and abrasives . Tungsten carbide is abrasive 

and turn with the most common material , and often the best 

materials .

Tungsten is in radiology shielding material . 

Transportation fluorodeoxyglucose general use tungsten 

container because fluorodeoxyglucose in high energy fluorine

-18 lead containers so can not be used .

Chemical properties of tungsten

Refractory metal tungsten&moly tungsten wire is a rare , high-temperature

hardness of the steel can be improved , the sixth period of

the periodic table are ( second long cycle) Ⅵ B family.

tungsten weights is a silvery-white metal that looks like steel.

Tungsten high melting point, low vapor pressure , evaporation

rate is also small . Tungsten is chemically stable at room

temperature when not react with air and water when not

heated, any concentration of hydrochloric acid, sulfuric

acid, nitric acid, hydrofluoric acid and aqua regia tungsten tube

are ineffective when the temperature was raised to 80 ° -100

when ° C, these various acids , except hydrofluoric acid ,

the other weak acid on the role of tungsten occur . At room

temperature , can be quickly dissolved in a mixture of

tungsten acid, hydrofluoric acid and concentrated nitric acid

, it does not work in an alkaline solution. The presence of

air under the conditions of the tungsten oxide can be melted

into the base tungstate , in the presence of an oxidant

(NaNO3, NaNO2, KClO3, PbO2) exists , the generation of a more

violent reaction tungstate . High temperature with chlorine,

bromine , iodine , carbon, nitrogen , sulfur and other

compounds , but not together with the hydrogenation .

The strategic significance of tungsten

Strategic Metals: Tungsten is a strategic metal . As we all

know , rare is an important strategic national resource , and

is typical of the rare metal tungsten&moly tungsten rods has a very important

purpose. It is an important part of contemporary high-tech

new materials , a series of electro-optical materials,

special alloys, new functional materials and organometallic

compounds such as are required to use the unique properties

of tungsten sheet. Although the amount is small, but vital , lack

of it can not . Which is widely used in modern communication

technology, computer , aerospace development ,

pharmaceuticals, photographic materials, optoelectronic

materials, energy materials and catalyst materials. China has

taken measures to limit and restrict the export of mining led

to China and the United States, the EU disputes , we can see

that the strategic significance of rare metal tungsten tube is

unusual in terms of tungsten represented .

Copper and molybdenum production forecast

Chinese production is expected to maintain a moderate growth
"By 2013, global tungsten&moly tungsten alloy supply growth will accelerate China's copper production is expected to maintain a moderate growth trend." March 28, Beijing Antaike Information Development has

Limited analyst Yang Changhua forecast, benefiting from the sharp rebound in copper mining and smelting of copper production capacity expansion, global refined copper production is expected to reach 20.65 million tons, with

An increase of about 4.1%.
According to Yang Changhua analysis, global tungsten project into operation gradually peak last year, global copper production of about 20 items (excluding China), with production capacity of about 820,000

T; This year there are still about 20 copper project into production, with production capacity of around 1.22 million tons, including the Oyu Tolgoi copper mine in Mongolia 45 tons capacity.
"A lot production release, will drive copper concentrate production increased at a faster pace." Yang Changhua said, "this year's global copper concentrate production will reach 13.62 million tons, an increase of

Long 6%. "
For domestic copper market, Yang Changhua said that with Wunugetushan copper-copper molybdenum mine, copper and other large-scale projects Duobaoshan gradually reach capacity, as well as some small copper mine production

This year is expected to increase production capacity of 1.52 million tons of copper, an increase of 7.7%. Taking into account this year will be the peak year for the domestic copper smelting capacity release expected in refined copper

Production will reach 6.1 million tons.
National Bureau of Statistics recently released data show that the first two months of this year, China's total production of 975,000 tons of refined copper, an increase of 11.9%.
Antaike analytical data show that in 2013, global refined copper will still continue oversupply trend is expected oversupply of about 400,000 tons; China's refined copper

Imports may fall, but the excess supply will remain at around 70 million tons.
Related Links
According to the International Copper Study Group (ICSG) statistics, in 2012, global refined copper production was 16.5 million tons, up from 2011's 16.2 million tons.

Copper-molybdenum separation equipment

Separation of copper tungsten concentrates mixed jobs currently used as flotation machine flotation machine Achilles Gentile, and Wei Muke Denver flotation machine flotation machine, the most used are the first two, Granville  flotation machine used only in flat . The former two inflatable mechanical agitation, mechanical agitation of the latter. Trough the volume of flotation machine is not large, rougher and sweep

Chosen as 1.13 to 2.83 m 3, selected from 0.68 to 1.4 m 3. Ping Tuoli Wali new plant for the first two ofmolybdenium rougher and selection of Wei Muke 120 cases of flotation machine is

In addition, the tank volume of 8.5 m 3

Accelerate the oxidation of tungsten, seriously shorten the life of the product, resulting in product failure

Tungsten halogen lamp with a key piece for the electrodes, tungsten and key pieces connected by spot welding, glass bulb filled with hydrogen, platinum plate and a glass full sealing at high temperatures to form tungsten halogen lamps. Tightness after sealing a direct impact on the life of the lamp. The quality of the products examined the strange, often found in air bubbles in the glass sealing surface Swiss platinum pieces, about 20% of total production. Gas tube leak caused the emergence of satiety, while accelerating the oxidation of tungsten, severely  copper molybdenum  of the product, resulting in product failure. In order to find out the reason for the gas saturation and gas saturation of the proposed measures to prevent, paper, failure analysis methods applied spectroscopy, scanning  Tungsten copper alloy  and transmission electron microscopy and other means to conduct research on a seal platinum chip sealing in high temperature and glass. The results showed that when aluminum and glass at high temperature sealing, are key causes of the bubble sheet internal inclusions and gases, the paper also presents how to prevent bubbles.

Deep red photo selection method blanking die and die thermal insulation and electric heating to an aluminum plastic brittle transition temperature above

Pure eight key pieces often pass deep red 38mm diameter used in the manufacture of thin-walled tubes of 45mm length, blanking round billet diameter 13omm. To reduce cracking tendencies, aluminum and aluminum deep drawing process will be a key piece stamping tools plastic is heated to a brittle transition temperature. To reduce the impact and  Tungsten copper alloy  and delamination of the key blank blanking die was modified. Polishing the flat punch with a rounded "V"-shaped concave surface, the "V"-type concave. Aluminum blade to shear loads. Two deep red photo selection method blanking die and die thermal insulation and electric heating to an  sandblasted tungsten target  brittle transition temperature. With this tool on the flywheel screw press can be easily cleaned without generating cracks round billet and the blanking operation and less laborious. Pat sector found in a platinum sheet manufacturing, particularly during cold rolling, the occurrence of the event that the incorrect heat treatment of any form of recrystallized material will be suitable for deep drawing.