Effect of VC and NbC additions on microstructure and properties of ultrafine WC-10Co cemented carbides

作     者：肖代红 贺跃辉 罗伟红 宋旼 

作者机构：State Key Laboratory of Powder MetallurgyCentral South University Hunan Import and Export Company of Chinese Automobile Industry 

出 版 物：《中国有色金属学会会刊：英文版》 (Transactions of Nonferrous Metals Society of China)

年 卷 期：2009年第19卷第6期

页      面：1520-1525页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Project(50823006)supported by the National Natural Science Foundation of China Project(200801348)supported by China Postdoctoral Science Foundation Project(50721003)supported by Innovative Research Groups of the National Natural Science Foundation of China 

主　　题：纳米硬质合金 性能测试仪 微观结构 风险投资 WC相 超细 碳化铌 X射线衍射仪 

摘      要：The nanocomposite WC-Co powders were prepared through planetary ball milling *** of grain growth inhibitor addition and the vacuum sintering parameters on the microstructure and properties of ultrafine WC-10Co cemented carbides were investigated using X-ray diffractometer,scanning electron microscope and mechanical property *** results show that VC and NbC additions can refine the WC grains,decrease the volume fraction of Co3W3C phase in ultrafine WC-10Co cemented carbides,and increase the hardness and fracture toughness of the base *** sintering for 60 min at 1 400℃,the average grain size and hardness of ultrafine-grained WC-10Co-1VC cemented carbide are 470 nm and HRA 91.5,*** fracture toughness of cemented carbide WC-10Co-1NbC alloy is over 7 MN·m -3/2 .