| 220 kV断路器合闸储能弹簧内嵌紧固件断裂分析 |
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| 引用本文： | 程翔,陈国宏,杨波,缪春辉,王若民,邢明军.220 kV断路器合闸储能弹簧内嵌紧固件断裂分析[J].电力安全技术,2021,23(1):34-36. |
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| 作者姓名： | 程翔 陈国宏 杨波 缪春辉 王若民 邢明军 |
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| 作者单位： | 国网安徽省电力有限公司电力科学研究院,安徽合肥230601;国网安徽省电力有限公司电力科学研究院,安徽合肥230601;国网安徽省电力有限公司铜陵供电公司,安徽铜陵244100;国网安徽省电力有限公司电力科学研究院,安徽合肥230601;国网安徽省电力有限公司电力科学研究院,安徽合肥230601;国网安徽省电力有限公司电力科学研究院,安徽合肥230601 |
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| 摘 要： | 分析某一断路器合闸储能弹簧内嵌紧固件断裂的原因,通过宏观检查、金相组织、硬度值及化学成分等手段研究。结果显示,该部件显微组织中存在有非金属夹杂物,导致其组织成分不均匀,同时热处理工艺(固溶和强化)不当,使得构件的塑性和韧性恶化,最终在多次动作后出现变形损伤,脆性断裂。
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| 关 键 词： | 储能弹簧 非金属夹杂物 固溶强化 脆性断裂 |
Fracture Analysis of Embedded Fastener in Closing Energy Storage Spring of 220 kV Circuit Breaker |
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| CHENG Xiang,CHEN Guohong,YANG Bo,MIAO Chunhui,WANG Ruomin,XING Mingjun.Fracture Analysis of Embedded Fastener in Closing Energy Storage Spring of 220 kV Circuit Breaker[J].Electric Safety Technology,2021,23(1):34-36. |
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| Authors: | CHENG Xiang CHEN Guohong YANG Bo MIAO Chunhui WANG Ruomin XING Mingjun |
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| Affiliation: | (Electric Power Research Institute of State Grid Anhui Electric Power Co.,Ltd.,Hefei 230601;Tongling Power Supply Company,Tongling 244100) |
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| Abstract: | This paper analyzes the causes of fracture of the embedded fastener in the closing energy storage spring of a circuit breaker, carries out studies by means of macroscopic examination, metallographic structure, hardness value and chemical composition analyses. The results show that there are non-metallic inclusions in the microstructure of the component, which leads to the uneven composition of the structure, also, the improper heat treatment process(solid solution and strengthening) degrades the plasticity and toughness of the component, finally resulting in deformation damage and brittle fracture after multiple actions. |
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| Keywords: | energy storage spring non-metallic inclusion solid solution strengthening brittle fracture |
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