| 重型镀锌弹簧垫圈断裂分析 |
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| 引用本文： | 蒋江明,朱水珍.重型镀锌弹簧垫圈断裂分析[J].热处理技术与装备,2009,30(6):60-62. |
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| 作者姓名： | 蒋江明 朱水珍 |
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| 作者单位： | 1. 中铁轨道系统集团有限公司,湖南,株洲,412005
2. 株洲九方装备模具实业有限公司,湖南,株洲,412001 |
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| 摘 要： | 针对客运专线铁路道岔用重型镀锌弹簧垫圈在预紧时发生突然断裂,通过对弹簧垫圈的宏观断口、化学成分、机械性能和显微组织进行分析.结果表明:弹簧垫圈在热成型时温度过高,表面严重脱碳,并局部有氧化皮压入.氧化皮脱落后形成凹坑,凹坑边角尖锐处淬火过程中造成应力集中,产生微裂纹,导致道岔装配预紧时发生脆断.
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| 关 键 词： | 镀锌 弹簧垫圈 断裂 |
Fracture Analysis of Heavy-duty Galvanized Spring Washer |
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| JIANG Jiang-ming,ZHU Shui-zhen.Fracture Analysis of Heavy-duty Galvanized Spring Washer[J].Heat Treatment Technology and Equipment,2009,30(6):60-62. |
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| Authors: | JIANG Jiang-ming ZHU Shui-zhen |
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| Affiliation: | JIANG Jiang-ming1,ZHU Shui-zhen2(1.China Railway Track Systems Group Co.,Ltd.,Zhuzhou Hunan 412005 China,2.Zhuzhou Gofront Equipment & Mould Co.,Zhuzhou Hunan 412001 China) |
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| Abstract: | In view of the heavy-duty galvanized spring washer for passenger dedicated railway line of turnouts occurs the sudden fracture when pre-tightening,in this paper the macro-fractography,chemical composition,mechanical properties and microstructure of the spring washer are analyzed.The results show that as temperature is too high at the spring washer in the hot molding there is serious decarburization in the surface,and the oxide scale is partially pressed into surface,and formed pits after shedding.Dring the ... |
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| Keywords: | galvanizing spring washer fracture |
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