A kind of material made ​​by powder metallurgy, by compounding hard refractory metal and a binder metal. Cemented carbides features high hardness, wear resistance, strength and good toughness, heat resistance, corrosion resistance and other series of excellent performance, particularly its high hardness and wear resistance, even reach up to 500 ° C the temperature, it also remains substantially unchanged 1000 ℃ still high hardness. Carbide is widely used as tool materials, such as turning, milling, rotary carbide bur , rod, drill, boring tool for cutting cast iron, non-ferrous metals, plastics, chemical fiber, graphite, glass, stone and ordinary steel can also be used to cut heat-resistant steel, stainless steel, high manganese steel, tool steel and other difficult to machine materials. New carbide cutting tools, the cutting speed is hundreds of times equal to the carbon steel.