Tungsten carbide powder (WC) is the main raw material for the production of cemented carbide. The chemical formula is WC. The full name is wolfram carbide, also translated as tungsten carbide. It is a black hexagonal crystal with metallic luster. 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 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 a steel cutting tool, is often added with titanium carbide, tantalum carbide or their mixture to improve its explosion resistance. The chemical properties of tungsten carbide are stable.

The working surface shall be free of decarburization and low hardness; The surface of the wire take-up plate shall be free of cracks, nicks, rust, grinding burns and other defects affecting the service performance.