Boron carbide possesses the specialty properties of light quality, neutron absorbing, semi-conductivity, etc. so it is used for armed forces and nuclear industry. Boron carbide is widely applied as follows: boriding refractory, ion transfuse, film layer as well as grinding, polishing, drilling hard metal alloys, jewels etc. Meanwhile, it is main material for wear-resisting parts, precise meter-age element, precise spray nozzle, sealed washed, smelting boron steel, boron alloy, etc.