摘要
就１７０Ｆ柴油机气门的早期断裂进行了失效分析根据该零件的工作条件及所进行的宏观断口分析、扫描电镜分析及金相检验，认为该气门断裂为疲劳断裂失效；
The fracture failure of 170F diesel exhaust valve lifter are analysed based on the working conditions of the exhaust valve lifter the observation of macroscopic topography, TEM analyses, metallographic examination, which shows fatigue fracture. The stress concentration caused by machined surface roughness in the locking groove of the exhaust valve lifter is the main fatigue failure reason. Some suggests for increasing the exhaust valve lifters life are provided.
出处
《广东工业大学学报》
CAS
1998年第1期29-31,共3页
Journal of Guangdong University of Technology
关键词
气门
疲劳
应力集中
exhaust valve lifter
\ fatigue failure
\ stress concentraion
