通过对某站失效线夹进行现场调研、宏观检验、化学成分分析、力学性能测试、金相检验、断口分析等,综合检验结果,对其开裂失效原因进行了分析。分析认为,天气反复变化导致的冻裂是该设备线夹鼓包开裂的主要原因;其次,表面疏松和粗大柱状晶是开裂的次要促进因素;而线夹镗孔时的偏心导致部分区域孔壁较薄是造成线夹开裂的又一次要诱发因素。 Through the on-site investigation, macroscopic inspection, chemical composition analysis, mechanical property test, metallographic examination and fracture analysis of the cable clip of a station, the cause of cracking failure was analyzed based on the test results. The analysis shows that the main cause of cracking of the cable drum is the crack caused by repeated weather changes. Secondly, the loose surface and the coarse columnar crystal are the secondary factors to promote cracking. The eccentricity of the bored bore leads to the partial pore wall Thinner is another cause of cracking of the clip.