摘要
某电子元器件在使用7年后发生断裂失效,采用拉伸试验机、显微硬度计、扫描电镜等手段对送检电子元器件机组中的导线进行断裂原因分析。结果表明,送检电子元器件的导线的材料强度满足GB/T 1179-2008《圆线同心绞架空导线》的规定要求;两部分断裂绞线均出现高温熔融断裂断口,二者应为匹配的断裂导线;铝绞线中有3根铝导线首先发生高温熔断,其余导线在拉应力下发生快速断裂。在实际应用过程中,应该加强对电子元器件机组中导线的短路保护,避免由于导线熔断而发生整体断裂失效的事故。
The fracture failure of an electronic component occurred after seven years of use.The fracture causes of the wires of electronic components submitted for inspection were analyzed by means of tensile testing machine,microhardness tester and scanning electron microscope.The results show that the material strength of the conductor of electronic components submitted for inspection meets the requirements of GB/T 1179-2008 round wire concentric stranded empty conductor;High temperature melting fracture occurs in both broken strands,and they shall be matched broken conductors;Three aluminum wires in the aluminum strand were fused at high temperature first,and the other wires were broken rapidly under tensile stress.In the process of practical application,we should strengthen the short-circuit protection of the conductor in the electronic component unit to avoid the accident of overall fracture failure due to the fuse of the conductor.
作者
周晚
ZHOU Wan(Xianyang Vocational and Technical College,Xi’an 712000)
出处
《环境技术》
2022年第3期27-32,共6页
Environmental Technology
