The fatigue crack propagation rate of the fusion line and weld toe are greater than that of the others.
熔合线和焊趾处疲劳裂纹扩展速率较其他部位大。
Through material, weld material, weld technology. Analyses the reason when cracking-fusion product in line pan. Introduces a method of preventing cracking-fusion production.
从原材料、焊接材料、焊接工艺三方面分析了中部槽产生裂纹的原因，从而得到一种避免裂纹产生的方法及预防措施。
Based on the fracture site investigation and macro-rod fracture analysis, the welding rod fracture occurred in the vicinity of the weld fusion line.
通过对最近的一次断裂拉杆现场调查和宏观断口分析，发现断裂发生在拉杆的补焊焊缝熔合线附近。
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