汽车钢板弹簧断裂失效分析  

Fracture Failure Analysis of Automobile Leaf Spring

作　　者：唐刚 TANG Gang(BYD Auto Industry Co., Ltd.,Shenzhen Guangdong 518118,China)

机构地区：[1]比亚迪汽车工业有限公司

出　　处：《汽车零部件》2019年第7期94-97,共4页Automobile Parts

摘　　要：采用金相及断口分析等方法,对早期疲劳断裂失效的汽车钢板弹簧进行综合分析,得出结论:钢板弹簧产生疲劳断裂的主要原因是由于喷丸工艺控制不当,致使弹簧表面存在较多的凹坑,这些凹坑在弹簧工作时成为应力集中点而形成疲劳源。Earlier fatigue fracture of automobile leaf spring was analyzed by metallography and fractography.It was found that many bullet pits were formed on leaf spring surface as a result of improper shot peening processing. These pits served as fatigue crack in initiation because of stress concentration.

关 键 词：钢板弹簧 喷丸 疲劳断裂 

分 类 号：U46[机械工程—车辆工程]