1. Metal tungsten and tungsten carbide powdwes as raw materials are mixed,packed in graphite boat ,melted in a melting furnace at about 3000ºC,and held for a certain  time to obtain alloy casting block of cast tungsten carbide with phase diagram of W2C and WC and particla size of 1-3μm.particle are silver grey with metal luster.    

cast tungsten carbide is applied by oxygenace-tylene flame,arc,spray,braze and wet welding on wear places.it is also adhered firmly to the surface of wear work pieces with epcxy resin and inorganic additives at lower temperature and impact.it is characterized by long tool life,easy maintenance,low coat and improved productivity.    

 In the production,whether equipment normally run is dependent on materials wear resistance for wear parts in great degree.selection of materials with material with better wear resistance provides longer equipment-life and stable running.cast tungsten carbide as a wear material is widely used in the mining,petroleum,construction and agricultural machinery and steel industry etc.because of its high hardness(HRA93.0-93.7),good wear resisitance,easy build-up welding and low cost