(1. 湖南大学 材料科学与工程学院，长沙 410082；
2. 株洲硬质合金集团有限公司，株洲 412000)
摘 要: 硬质合金在使用中一般同时承受多重疲劳的共同作用，了解硬质合金的疲劳破坏机理和提高其疲劳性能是硬质合金研究领域的一个重要方向。综述各种硬质合金工具在不同环境中的疲劳破坏情况，概括目前国内外学者对硬质合金疲劳性能的机理的研究进展。同时介绍本课题组在自行改造的疲劳试验机上对硬质合金多重疲劳开展的一些工作。
关键字: 硬质合金；疲劳；裂纹扩展；断裂
（1. College of Materials Science and Engineering, Hunan University, Changsha 410082, China;
2. Zhuzhou Cemented Carbide Group Co., Ltd., Zhuzhou 412000, China）
Abstract:In actual applications, the cemented carbides stand the multiple fatigue action. Understanding the fatigue mechanism and improving the fatigue property are the important direction for the research of cemented carbides. The applications and studies of fatigue and fracture of cemented carbides were reviewed. The domestic and foreign research results on the mechanism of fatigue fracture of cemented carbides were summarized, and the recent works of authors’ research group were also introduced.
Key words: cemented carbides; fatigue; crack propagation; fracture
