| 有轨电车受电弓弹簧的断裂失效分析 |
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| 引用本文： | 刘勇,王慧,张挺,刘海波,龚侯,宣祎恂,崔喆珉. 有轨电车受电弓弹簧的断裂失效分析[J]. 金属热处理, 2020, 45(5): 253-256. DOI: 10.13251/j.issn.0254-6051.2020.05.048 |
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| 作者姓名： | 刘勇 王慧 张挺 刘海波 龚侯 宣祎恂 崔喆珉 |
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| 作者单位： | 1. 浙江国检检测技术股份有限公司, 浙江 海盐 314300;2. 中国航发湖南动力机械研究所, 湖南 株洲 412002 |
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| 摘 要： | 某有轨电车顶部受电弓弹簧在车辆正常行驶过程中发生断裂。为了分析断裂的原因,应用扫描电镜、能谱仪、光学显微镜、直读光谱分析仪对该弹簧进行了宏观检查、断口扫描、显微组织检测、化学成分等分析,同时还进行了硬度梯度试验。结果表明:弹簧服役过程中承受拉应力作用,同时服役环境中存在腐蚀性介质,同时满足应力条件与介质条件,结合断口微观形貌判定该弹簧失效模式为应力腐蚀断裂。
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| 关 键 词： | 有轨电车受电弓 弹簧 应力 介质 应力腐蚀断裂 |
| 收稿时间： | 2019-10-11 |
Fracture failure analysis of tram pantograph spring |
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| Liu Yong,Wang Hui,Zhang Ting,Liu Haibo,Gong Hou,Xuan Yixun,Cui Zhemin. Fracture failure analysis of tram pantograph spring[J]. Heat Treatment of Metals, 2020, 45(5): 253-256. DOI: 10.13251/j.issn.0254-6051.2020.05.048 |
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| Authors: | Liu Yong Wang Hui Zhang Ting Liu Haibo Gong Hou Xuan Yixun Cui Zhemin |
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| Affiliation: | 1. Zhejiang Guo Jian Testing Technology Co., Ltd., Haiyan Zhejiang 314300, China;2. AECC Hunan Powerplant Research Institute, Zhuzhou Hunan 412002, China |
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| Abstract: | Fracture occurred on a spring of pantograph on the top of a tram during normal vehicle operation. In order to find the cause, the spring was analyzed by means of scanning electron microscope, energy spectrometer, optical microscope and direct reading spectrum analyzer for macroscopic observation, fracture scanning, metallographic examination and chemical composition. The hardness gradient test was also carried out. The results show that the fractured spring is subjected to tensile stress during service and exposed to corrosive medium in the service environment. According to that the stress condition and the medium condition are satisfied simultaneously, the failure mode of the spring is judged to be stress corrosion fracture. |
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| Keywords: | tram pantograph spring stress medium stress corrosion fracture |
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