发动机曲轴失效分析  

Failure analysis of engine crankshaft

作　　者：王凡[1] 闫世春[1] 孙远东[1] 刘素芬[1] 温铁丽[1] 黎鑫[1] 于宏[1] 

机构地区：[1]中国兵器工业集团第五二研究所,内蒙古包头014034

出　　处：《金属热处理》2015年第12期194-197,共4页Heat Treatment of Metals

摘　　要：某型号汽车发动机曲轴使用很短时间便发生断裂事故。借助光学显微镜、扫描电子显微镜等手段对该汽车用发动机曲轴的材质、裂纹形态及扩展方式及断口表面进行分析。结果表明,该汽车用发动机曲轴加工时在应力集中程度最大的地方有规则的加工刀痕是该曲轴疲劳断裂的主要原因。A type of car engine crankshaft used for very short period occurs break.The composition and microstructure,crack morphology crack propagation mode and fracture of the engine crankshaft were studied by optical microscopy,SEM and so on.The results show that the regular cutting marks appeared during the machining process of the crankshaft is the main cause of the fatigue rupture.

关 键 词：曲轴 应力集中 疲劳断裂 

分 类 号：TG113.25[金属学及工艺—物理冶金]