摘要
通过对铁路牵引电机机座吊挂焊缝裂纹断口的宏观分析、扫描电镜分析和金相分析,指出因弧板变形,焊接时弧板与铁芯之间形成间隙,造成局部焊接缺陷,最终导致焊缝疲劳开裂,并提出改善措施。
Through macro analysis, SEM analysis and metallographic analysis of weld cracking fracture of the railway traction motor frame suspension, it points that due to the deformation of the arc plate, the gap between the arc plate and the iron core is formed during welding, which causes local welding defect and eventually leads to fatigue cracking, and the improvement measures are put forward.
引文
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