理化检验-物理分册2017，Vol.53Issue(11)：833-836,4.DOI:10.11973/lhjy-wl201711016
发动机连杆螺栓断裂原因分析
Analysis on Fracture Reasons of a Connecting Rod Bolt of an Engine
袁峰 1靳宝宏 1门菲1
作者信息
- 1. 泛亚汽车技术中心有限公司,上海 201201
- 折叠
摘要
Abstract
A connecting rod bolt of an engine fractured during the durability bench test of the engine.The fracture reasons of the bolt were analyzed through macroscopic inspection,chemical composition analysis,scanning electron microscopy analysis,metallographic inspection,energy spectrum analysis and so on.The results show that:the fracture mode of the connecting rod bolt was multi-source fatigue fracture;there were plenty of elements of phosphorus and zinc inside cracks,which indicated that the cracks had been produced in thread rolling process;the phosphatizing liquid infiltrated into the micro cracks during the following phosphatizing treatment,and the fatigue cracks gradually expanded and led to the fracture of the bolt during the durability bench test.关键词
发动机/连杆/螺栓/断裂/磷化/多源疲劳Key words
engine/connecting rod/bolt/fracture/phosphatizing/multi-source fatigue分类
矿业与冶金引用本文复制引用
袁峰,靳宝宏,门菲..发动机连杆螺栓断裂原因分析[J].理化检验-物理分册,2017,53(11):833-836,4.
