GIS用不锈钢板簧断裂分析与预防
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摘要
GIS用不锈钢板簧在进行200次操作试验时发生断裂,通过宏观分析、化学成分分析、断口分析、金相分析、力学性能试验等方法对板簧断裂原因进行了分析。结果表明:板簧表面存在的微小缺陷、显微组织中的沟状组织及夹杂物、含有氯离子的腐蚀环境以及应力共同作用,导致板簧发生了应力腐蚀开裂。最后针对板簧断裂原因提出了预防措施。
The stainless steel plate spring in GIS fractured during 200 cycles' operation test.The fracture causes of the plate spring were analyzed by macroscopic analysis,chemical composition analysis,fracture analysis,metallographic analysis and mechanical property test.The results show that the micro-defects on the surface of the plate spring,the grooves and inclusions in the microstructure,the corrosive environment containing chloride ions and the stress acted together and resulted in the stress corrosion cracking of the plate spring.Finally,preventive measures were put forward for the fracture causes of the plate spring.
The stainless steel plate spring in GIS fractured during 200 cycles' operation test.The fracture causes of the plate spring were analyzed by macroscopic analysis,chemical composition analysis,fracture analysis,metallographic analysis and mechanical property test.The results show that the micro-defects on the surface of the plate spring,the grooves and inclusions in the microstructure,the corrosive environment containing chloride ions and the stress acted together and resulted in the stress corrosion cracking of the plate spring.Finally,preventive measures were put forward for the fracture causes of the plate spring.
引文
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[2]黎斌.SF6高压电器设计[M].北京:机械工业出版社,2003.
[3]王俊波,王岩,李国伟,等.一起GIS触头接触不良导致的接地事故分析[J].电工材料,2013(4):43-45.
[4]王大伟,刘作庆,王路平.提高大电流组合电器用隔离开关板簧合格率的工艺改进[J].热处理技术与装备,2012,33(4):31-33.
[5]王荣.机械装备的失效分析(续前)第2讲宏观分析技术[J].理化检验(物理分册),2016,52(8):534-541.
[6]王荣.机械装备的失效分析(续前)第3讲断口分析技术(下)[J].理化检验(物理分册),2016,52(12):833-840.
[7]王荣.机械装备的失效分析(续前)第5讲定量分析技术[J].理化检验(物理分册),2017,53(6):413-421.
[8]全国钢标准化技术委员会.金属和合金的腐蚀不锈钢晶间腐蚀试验方法:GB/T 4434-2008[S].北京:中国标准出版社,2009.
[9]张凯.06Cr19Ni10奥氏体不锈钢晶间腐蚀的解析[J].内江师范学院学报,2015(4):18-20,38.
[10]吕建刚,肖李鹏.钢中非金属夹杂物及其金相检验[J].理化检验(物理分册),2015,51(4):229-233.
[11]熊立斌,孟若愚.0Cr18Ni9不锈钢换热管应力腐蚀开裂原因分析[J].理化检验(物理分册),2017,53(12):915-917.
[12]李岩,方可伟,刘飞华.Cl-对304L不锈钢从点蚀到应力腐蚀转变行为的影响[J].腐蚀与防护,2012,33(11):955-959.
[13]史宝玉,李岩,张腾飞,等.液氮储存罐304不锈钢法兰连接螺栓断裂失效分析[J].理化检验(物理分册),2017,53(10):740-749.