理化检验-物理分册2017，Vol.53Issue(9)：659-663,5.DOI:10.11973/lhjy-wl201709010
发动机惰轮铁轮开裂失效分析
Failure Analysis on Cracking of the Iron Wheel of a Engine Idler Gear
摘要
Abstract
The power-assisted steering system of an automobile engine failed in running process.After dismantling and disposal,it was found that the idler gear of the engine cracked.In order to find the failure causes of the idler gear,the fracture analysis,chemical composition analysis,hardness testing,metallographic inspection and the force analysis were adopted.The results indicate that:the real force burdened by the iron wheel of the idler gear was higher than the designed max radical force,and the designed strength of the iron wheel was insufficient,which led to the failure and low-cycle fatigue cracking along the circular arc chamfering surface during use.Finally,the problem was solved effectively by the improvement of technological design.关键词
惰轮/铁轮/开裂/低周疲劳/受力分析Key words
idler gear/iron wheel/cracking/low-cycle fatigue/force analysis分类
矿业与冶金引用本文复制引用
曹鑫,陈小工,胡四军..发动机惰轮铁轮开裂失效分析[J].理化检验-物理分册,2017,53(9):659-663,5.
