| 低温储罐三通切换阀管件失效分析 |
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| 引用本文： | 李云,张红星,朱潮明.低温储罐三通切换阀管件失效分析[J].中国特种设备安全,2014(8):33-36. |
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| 作者姓名： | 李云 张红星 朱潮明 |
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| 作者单位： | 嘉兴市特种设备检测院,嘉兴314050 |
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| 摘 要： | 在低温储罐定期检验中，发现储罐底部一个三通切换阀管件上存在多处裂纹及泄漏现象。通过对失效件进行宏观检验、化学成分、电镜扫描、金相组织、腐蚀产物能谱、非金属夹杂物含量、显微硬度等进行测试，结果表明：管件材质低于设计要求，管件承受载荷及应力作用，存在CI-等奥氏体不锈钢腐蚀敏感介质，造成该处奥氏体不锈钢管件应力腐蚀失效。
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| 关 键 词： | 低温储罐 裂纹 失效分析 SEM 能谱分析 |
Failure Analysis on Three Switching Valve Fittings of Cryogenic Tank |
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| Authors: | Li Yun Zhang Hongxing Zhu Chaoming |
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| Institution: | Li Yun Zhang Hongxing Zhu Chaoming (Jia xing Special Equipment Inspection Institute Jiaxing 314050) |
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| Abstract: | Cracks and leaks were found on the switching valve during a periodic inspection on a cryogenic tank. The test results showed the material of the tube didn＇t match the requirement of the standard through macroscopic examination, chemical composition, SEM, metallurgical analysis, EDS Analysis and micro-hardness test. It was concluded that the stress corrosion lead to the failure on the co-effect of load and stress, chemical composition and the corrosion of CI-. |
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| Keywords: | Cryogenic tank Failure analysis SEM EDS analysis |
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