Cemented carbide is an alloy material made from hard compounds of refractory metals and bonded metals through a powder metallurgical process. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance, etc. Especially its high hardness and wear resistance, even at a temperature of 500℃also basically remain unchanged, at 1000℃still has a very high hardness