摘要
某换流站交流滤波器场500kV瓷柱式断路器开关传动机构拐臂发生了断裂。通过对拐臂断裂部位进行宏观和微观形貌及能谱分析、并对拐臂进行了拉伸力学性能和布氏硬度检测,分析了断裂原因。结果表明,断裂原因是原生铁纯度低,杂质元素含量高,铸造工艺不良,存在大量铸造缺陷,且力学性能较差,不能满足长期运行的要求。为避免同类事故,建议加强监督,严把设备质量关。
The arm of the switching mechanism of 500 kV porcelain column circuit breaker in the AC filter field of a converter station was broken.The fracture reasons were analyzed by the macroscopic and microscopic morphology and energy spectrum analysis and the tensile mechanical properties and Brinell hardness test of the arm.The results show that the fracture is caused by low purity of raw pig iron,high content of impurity elements,poor casting process,large number of casting defects,and poor mechanical properties,which could not meet the requirements of long-term operation.In order to avoid similar accidents,it is suggested to strengthen supervision and strictly control the quality of equipment.
作者
张鸿武
冯楠楠
刘蕊
陈阳
ZHANG Hongwu;FENG Nannan;LIU Rui;CHEN Yang(Shandong Electric Power Industry Boiler and Pressure Vessel Inspection Center Co.,Ltd.,Jinan 250003,China;Jinan Jingwei Electric Power Engineering Consulting Co.,Ltd.,Jinan 250021,China)
出处
《铸造技术》
CAS
2020年第10期969-973,共5页
Foundry Technology
关键词
换流站
传动机构拐臂
杂质元素含量高
铸造工艺不良
断裂
金属监督
converter station
transmission mechanism crank arm
high content of impurity elements
poor casting process
fracture
metal supervision
