Formation Mechanisms of Microstructure Imperfections and their Effects on Strength in Submicron Cemented Carbide

摘要：

　　The characteristics and formation mechanisms of microstructure imperfections in two sets of submicron WC-10%Co cemented carbides,which are fabricated b(y) vacuum and low-pressure sintering,respectively,is deeply analyzed.Main imperfections are pore-Co-pool in the vacuum-sintered samples.The number of pore-Co-pool is obviously reduced by low-pressure sintering,but many porous microstructures with poor-Co or Co-free are easily introduced; the impurities segregation is also easily formed.Transverse rupture strength (TRS) of samples is strongly affected by the characteristics and size of imperfections.Two linear relationships between TRS and pore size are experimentally established,and a critical pore size has been calculated to be 28.8 μm.

关键词： WC-Co cemented carbides fracture origin microstructure imperfections strength

作者: Wu Chonghu Zhang Taiquan

作者单位: China National R&D Center for Tungsten Technology,Xiamen Tungsten Co.Ltd.Technology Center,Xiamen 361009,China;Xiamen Golden Egret Special Alloy Co.Ltd.,Xiamen 361006,China

会议类型: 国际会议

会议名称: 2012 Zhuzhou International Conference on Cemented Carbides(株洲硬质合金国际学术会议)

会议地点: 株洲

会议语种:英文

页码: 355-362

在线出版日期: 2012-09-12（万方平台首次上网日期，不代表论文的发表时间）