tungsten carbide coating

  The microstructure and mechanical properties of laser cladding nanometer tungsten carbide coating:
In tungsten carbide, tungsten carbon atoms embedded metal lattice clearance, does not destroy original metal lattice, interstitial solid solution formation, therefore is also called the interstitial (or
Insert) compounds. Tungsten carbide can be made of a mixture of tungsten and carbon heating system, the existence of hydrogen and hydrocarbons can accelerate the reaction. If use of tungsten
Oxygen compound preparation, the product eventually should be carried out at 1500 ℃ vacuum processing, to remove carbon oxides. Tungsten carbide is suitable for machinery under the high temperature
Processing, can produce cutting tools, structure materials of kiln, jet engines, gas turbines, nozzle, etc.
Another of tungsten and carbon compounds as the two tungsten carbide, chemical formula for the W2C, melting point is 2860 ℃, boiling point 6000 ℃, relative density 17.15. The nature,
Method, USES with tungsten carbide.
Using 7 kw crosscurrent CO2 laser in the laser cladding was carried out on 2 crl3 stainless steel substrates of nanometer WC powder experiment. Using scanning electron microscopy (SEM), X-ray radiation
X-ray diffraction (XRD), X-ray energy dispersive spectrometer (EDAX), microhardness tester and equipment inspection organization and performance of the coating. The results show that the
Laser cladding method of nanometer WC powder can be dense composite coating; Coating and cladding zone presents a typical Fe cellular between dendrites and dendrites
Fe - C - W group; XRD analysis showed that the composite coating is mainly composed of Fe, WC, W2C and Fe3C several phase composition; The performance test results show that the surface of the coating
Hardness is 1750 hv. The cladding layer, the average hardness is 1200 hv, wear resistance is 2.5 times higher than the matrix.
Valve is dosage of mechanical industry in big and one of the main basic parts. The valve in the process of frequent opening and closing, the sealing surface is scratch, and medium
Corrosion, erosion, and the role of the high temperature and other factors, and make the valve sealing surface damage early, become the untight seal, source of leaks.
Using HVOF cobalt-based carbonized tungsten alloy powder or nickel-based carbonized tungsten alloy powder and chrome base carbonized tungsten hardness can reach HV1200 high-temperature alloy powder
850 degrees, make the valve components, wear resistance, corrosion resistance, high temperature resistance, resistance to oxidation. More than built-up welding, crossing the chromium, carburized and quenched and tempered, process, can make the life
Production efficiency is increased by more than 2 times, production cost reduced by more than 50%, can prolong service life 10 times.
Tungsten carbide coating spraying component instance, disc, valve seat, valve core, plunger, sphere, flange, valve stem.