吊车支架螺栓断口SEM分析

SEM analysis of the fractured crane bracket bolts

采用扫描电子显微镜(SEM)对吊车支架的1、2号螺栓断口进行了宏观、微观形貌观察和分析研究,认为该断口属于载荷超过螺栓承载能力条件下的一次性断裂失效断口.

The macro-and micro-morphology of Nos.1,2 crane bracket blots were characterized by scanning electron microscopy（SEM） in this paper.It was concluded that the bolts were fractured due to overload which bringing about a primary fracture failure.