推力滚针轴承保持架断裂原因分析  

Analysis on Cause for Breaking of Thrust Needle Bearing Retainer

作　　者：陈旭 CHEN Xu(Wuxi Inspection&Certification Institute,Wuxi 214101,Jiangsu China)

机构地区：[1]无锡市检验检测认证研究院,江苏无锡214101

出　　处：《热处理》2023年第1期53-54,58,共3页Heat Treatment

摘　　要：某推力滚针轴承保持架在使用的早期断裂。通过断口分析、化学成分检测、硬度测试和金相检验等方法分析了保持架断裂的原因。结果表明:保持架R角处有易产生应力集中的机加工缺陷和裂纹,导致其在较高旋转轴向应力的作用下疲劳断裂。Retainer of a thrust needle bearing broke early in service.The cause of retainer breaking was analyzed with the aid of fracture testing,chemical composition detection,hardness testing and metallographic examination.The results showed that machining defects and cracks,in which the stress concentration tended to occur,appeared at R corner of the retainer,thus resulting in its early fatigue fracture under the action of high rotational axial stress.

关 键 词：滚针轴承 保持架 机加工缺陷 

分 类 号：TG115[金属学及工艺—物理冶金]