Abstract

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Title:: Development on Preparation Technology of Ultrafine Grained Cemented Carbides and Their Raw Materials in China

Author(s):: WU Chonghu; NIE Hongbo; XIAO Mandou; (1. National R&D Center for Tungsten Technology, Technology Center,Xiamen Tungsten Co,Ltd Xiamen 361009, China)

Abstract:: The sintered WC Co with ultrafine grain sizes (<05 nm) is called ultrafine cemented carbide, which possesses optimized properties such as hardness and strength. Efficient tools prepared by ultrafine cemented carbides have been used in aerospace，nuclear energy, automotive，generating equipment，new energy and other fields of electronic communications．The development of ultrafine cemented carbides and raw materials was systematically introduced and reviewed，mainly in aspects of the preparation，property and characterization of ultrafine tungsten carbide powder，ultrafine cobalt powder, WCCo composite powder and ultrafine cemented carbides in China．Prospects on technology of the ultrafine cemented carbide were discussed finally．