Compound Fatigue Behavior of Cemented Tungsten Carbides

摘要：

　　The fatigue behaviour of four cemented tungsten carbides YGH60,YGR60,YGH30,YGR30 under cyclic loading,thermo-mechanical and thermo-corrosion condition were investigated.The results show that:thermo-mechanical conditions obviously reduce fatigue life obviously compared with only mechanical conditions.The common feature of the S-N curves obtained in both fatigue conditions is that:at high stress level,materials fatigue life is more corresponding to its strength.While at low stress level fatigue life increases with increasing binder content.WC-Co-Ni-Cr alloys (YGR) show better thermo-mechanical fatigue resistance than WC-Co alloys (YGH).Thermo-corrosion fatigue results show that high binder content alloys YGH60 and YGR60 exhibit lower crack propagation rate.Low binder content alloys YGH30 and YGR30 conduct better crack propagation resistance in acid environment than in neutral and alkali solution.Co-Ni-Cr binder alloys YGR30 and YGR60 show better crack propagation resistance in corrosion environment.It is worth noting that the crack propagation behavior of YGR60 is similar for all three environments.

关键词： cemented carbide fatigue fracture thermo-mechanical fatigue thermo-corrosion fatigue crack propagation

作者: Chen Ding Jiang Yong Chen Zhenhua Zhang Zhongjian Xu Tao Peng Wen

作者单位: College of Materials Science and Engineering,Hunan University,Changsha Hunan,410082,China Zhuzhou Cemented Carbide Group.Ltd.,Zhuzhou Hunan,412000,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: 347-354

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）