汽车定子盘开裂原因分析  

Cracking Reason Analysis of Stator Plate of Automobile

作　　者：韩波[1] 陈申芳[2] 黄嘉乐[1] 

机构地区：[1]上海交通大学材料科学与工程学院,上海200240 [2]上海宝冶工程技术有限公司,上海200941

出　　处：《理化检验（物理分册）》2011年第3期189-191,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：某汽车制动系统定子盘使用不到六个月即在焊接热影响区部位发生开裂,采用金相检验、化学成分分析、硬度测试及断口分析等方法对该定子盘开裂的原因进行了分析。结果表明:引起开裂的主要原因是焊接区域及母材应力集中严重,加上焊缝与母材熔合不良,定子盘在使用过程中承受扭力,最终造成了疲劳开裂。The cracking occurred in the weld heat affected zone of a stator plate of automotive brake systems using less than six months.By means of metallographic examination,chemical composition analysis,hardness testing and fracture analysis,the cracking reason of stator plate was analyzed.The results showed that the main factors were severe stress concentration in weld zone and base metal,coupled with the bad fusion between the weld and base metal,and the stator plate withstand torque during use,eventually leading to fatigue cracking.

关 键 词：定子盘 开裂 应力集中 疲劳 

分 类 号：U463.5[机械工程—车辆工程]