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.‍