摘要
用化学分析、扫描电镜观察和金相检验等方法对断裂的发动机连杆进行了分析。结果表明,连杆表层的脱碳层是导致连杆疲劳断裂的主要原因,基体中网状铁素体则助长疲劳裂纹的扩展。提出了相应的改进措施。
The failure connecting rod in automotive engine was analyzed by chemical analysis, SEM observation and metallographic examination. The results show that the main reason for the fatigue fracture of connecting rod is the decarburized layer. The propagation of the fatigue crack is promoted by the mesh ferrite in the matrix. The improvement measures are proposed.
出处
《金属热处理》
CAS
CSCD
北大核心
2013年第7期122-124,共3页
Heat Treatment of Metals
关键词
连杆
断裂
疲劳
脱碳
connecting rod
fracture
fatigue
decarburization
