Tungsten Carbide Is Chemically Stable

Tungsten carbide is a compound composed of tungsten and carbon with a molecular formula of WC and a molecular weight of 195.85. It is a black hexagonal crystal with metallic luster, and its hardness is similar to that of diamond. It is a good conductor of electricity and heat. Tungsten carbide is insoluble in water, hydrochloric acid and sulfuric acid, and is easily soluble in the mixed acid of nitric acid and hydrofluoric acid. Pure tungsten carbide is brittle, and if it is mixed with a small amount of titanium, cobalt and other metals, the brittleness can be reduced. Tungsten carbide used as a steel cutting tool is often added with titanium carbide, tantalum carbide or their mixture to improve the anti-knock ability. Tungsten carbide is chemically stable. Tungsten carbide powder is used in cemented carbide production materials.

In the air above 500 ℃, the active oxidation starts, and the antioxidant capacity is weak. [1] 

Strong acid resistance.

Chemical Reaction Formula: W + C = WC Note: Reaction at 1150°C.

It does not react with chlorine below 400 °C; it can react violently with fluorine at room temperature; it is oxidized to tungsten oxide when heated in the air.

It is widely used in high-speed cutting tools, furnace structural materials, jet engine components, metal ceramic materials, resistance heating elements, etc.

It is used to manufacture cutting tools, wear-resistant parts, melting crucibles of copper, cobalt, bismuth and other metals, wear-resistant semiconductor films.

Used as superhard tool material and wear-resistant material. It can form solid solutions with many carbides. WC-TiC-Co carbide tools have been widely used. It can also be used as a modified additive for NbC-C and TaC-C ternary system carbides, which can not only reduce the sintering temperature, but also maintain excellent properties, and can be used as aerospace materials.

Tungsten carbide (WC) powder was synthesized by using tungsten anhydride (WO3) and graphite at a high temperature of 1400-1600 °C in a reducing atmosphere. Dense ceramic products can be obtained by hot pressing sintering or hot isostatic pressing sintering.