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

摘要：

The nanocomposite WC-Co powders were prepared through planetary ball milling method.Effects 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 tester.The 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 alloys.After 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,respectively.The fracture toughness of cemented carbide WC-10Co-1NbC alloy is over 7 MN·m-3/2.

关键词： ultrafine WC-10Co cemented carbide VC NbC microstructure mechanical properties

作者: XIAO Dai-hong HE Yue-hui LUO Wei-hong SONG Min

作者单位: State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China Hunan Import and Export Company of Chinese Automobile Industry,Changsha 410001,China

会议类型: 国际会议

会议名称: 2009 Frontier Symposium of China Postductors on Materrials Science(2009年中国博士后材料科学前言论坛)

会议地点: 长沙

会议语种:英文

页码: 1520-1525

在线出版日期: 2009-11-22（万方平台首次上网日期，不代表论文的发表时间）