Tungsten carbide is a compound of tungsten and carbon. It is a black hexagonal crystal with a metallic luster, similar hardness to diamond and good conductivity.
Tungsten carbide is insoluble in water, hydrochloric acid and sulfuric acid, but easily soluble in the mixed acid of nitric acid and hydrofluoric acid. Pure tungsten carbide is fragile, if a small amount of titanium, cobalt and other metals are added, the brittleness can be reduced.
Tungsten carbide, which is used as steel cutting tool, is often added with titanium carbide, tantalum carbide or their mixture to improve the antiknock ability. The chemical properties of WC are stable. Tungsten carbide powder is used in cemented carbide production.
It is widely used in high-speed cutting tools, kiln structural materials, jet engine parts, cermet materials, resistance heating elements and so on. Used for manufacturing cutting tools, wear-resistant parts, melting crucible of copper, cobalt, bismuth and other metals, wear-resistant semiconductor film. It can be used as superhard tool material and wear-resistant material. It can form solid solution with many carbides. WC tic co cemented carbide tools have been widely used. It can also be used as an additive for the modification of carbides in nbc-c and tac-c ternary systems. It can not only reduce the sintering temperature but also maintain excellent properties. It can be used as an aerospace material. Tungsten carbide (WC) powder was synthesized from WO3 and graphite in reducing atmosphere at 1400 ~ 1600 ℃. Dense ceramic products can be prepared by hot pressing sintering or hot isostatic pressing sintering.
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