42CrMoA钢连杆断裂失效分析  

Failure analysis of 42CrMoA steel connecting rod

作　　者：高学敏[1] 于志伟[1] 许晓磊[1] 

机构地区：[1]大连海事大学机电与材料工程学院,辽宁大连116026

出　　处：《金属热处理》2008年第5期100-101,共2页Heat Treatment of Metals

摘　　要：42CrMoA钢柴油机连杆在疲劳试验时发生断裂,连杆宏观及SEM微观断口观察结果表明,其失效方式属双源疲劳断裂,表面出现较厚的脱碳层是发生疲劳断裂的主要原因。42CrMoA steel connecting rod of a diesel engine fractured during performing fatigue test. The fracture surface was observed by OM and SEM. The results show that the double-souree fatigue fracture is the failure way of the connecting rod. The appearance of the deearburization layer on the connecting rod surface is main reason for the fatigue fracture.

关 键 词：失效分析 连杆 疲劳断裂 脱碳 

分 类 号：TG157[金属学及工艺—热处理]