【摘要】 通过扫描电镜 (SEM)、能谱 (EDS)和金相分析等方法对电机轴疲劳断裂失效原因进行了分析 ,发现疲劳裂纹源为轴表面的环状切削加工痕迹 ,轴表面的堆焊层、钢中硫化锰含量过高以及未按要求进行调质处理等因素加速了电机轴的疲劳断裂过程更多还原

【Abstract】 The fatigue fracture of a electric motor shaft was analyzed by means of SEM,EDS and micrography in this paper.The results indicate that the cutter mark on the surface of the shaft is the source of the fatigue fracture.The welding layer on the shaft surface,the high content of MnS in the steel and the non normal heat treatment accelerate the process of fatigue fracture.更多还原