Microstructure and Properties of Ultrafine WC-Co-VC Cemented Carbides with different Co Content

摘要：

　　Ultrafine WC-Co-VC cemented carbides are used extensively in a variety of industri al environments for their excellent mechanical prop erties and outstanding wear resistance.Co content affects the service performance of the cemented car bides.In the present study, the influence of Co con tent on microstructure, physical and mechanical properties was investigated systematically.Ultrafine WC-Co-VC cemented carbides with varying Co content from 4.0 to 7.0wt% and assistance of VC (0.35wt.%) as inhibitor of WC grain growth were prepared.The physical and mechanical properties were tested and the microstructure characteristics were observed using metalloscope and SEM.From the results, it was found that with Co content in creasing, both the cobalt magnetism and bending strength increased, while the coercive force, Rock well hardness, density and abrasive wear resistance decreased.In addition, the metalloscope and SEM results showed that the increase of Co content in WC -Co-VC cemented carbides tended to reduce the quentity and size of micro-pores, and make the change of fracture mode from brittle fracture to duc tile fracture.

关键词： Ultrafine Cemented carbide Co content Microstructure Properties

作者: Kai-hua Shi Ke-chao Zhou Zhi-you Li Xiu-qi Zan Kai-lin Dong Qing Jiang

作者单位: State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China Zi Gong Cemented Carbide Corporation Limited,Zigong 643011,China

会议类型: 国际会议

会议名称: The 12th China-Russia Symposium on Advanced Materials and Technologies(第十二届中俄双边新材料新工艺国际会议)

会议地点: 昆明

会议语种:英文

页码: 448-454

在线出版日期: 2013-11-19（万方平台首次上网日期，不代表论文的发表时间）