Tungsten carbide has a performance between the tools and construction materials between ceramics and high-speed steel, has a overall performance of high hardness, high strength, high density, corrosion resistance, high temperature oxidation resistance and low coefficient of expansion. Its life expectancy is ten times or even several times over steel. Commonly used tungsten carbide die is cold heading die, drawing die, hexagonal die, spiral mold, etc., Tungsten carbide die is very widely used in the mold industry. And the industry generally uses tungsten carbide cobalt.