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2Cr1MoVG 蒸汽管道开裂失效原因分析
Failure cause analysis on cracking of 12Cr1MoVG steam pipeline
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- DOI:
- 作者:
- 唐素梅1，刘强2，王鑫3，宋策3?，吴英弘4
Tang Sumei 1, Liu Qiang 2, Wang Xin 3, Song Ce 3?, Wu Yinghong 4
- 作者单位:
- （1. 榆林市特种设备检验检测院，陕西榆林719000；2. 中煤陕西榆林能源化工有限公司机械动力部，陕西榆林719000；3. 中国特种设备检 测研究院，北京100029；4. 北京化工大学，北京100029）
(1. Yulin City Special Equipment Inspection, Yulin 719000, China; 2. Machinery Department, Chinacoal Shaanxi Yulin Energy & Chemical Co., Ltd., Yulin 719000, China; 3. China Special Equipment Inspection And Research Institute, Beijing 100029, China; 4. Beijing University of Chemical Technology, Beijing 100029, China)
- 关键词:
- 裂纹；泄漏；高温蠕变
crack; leakage; high temperature creep
- 摘要:
- 摘要：某煤化工企业的在用蒸汽管道服役10 a 后发生蒸汽泄漏。为找到泄漏原因，避免此类
情况再次发生，在管道紧急停工后，将开裂部位切割取下，进行详细的失效分析。对蒸汽管道
的开裂部位开展了宏观检查、无损检测、化学成分分析、金相分析、电镜分析、力学性能测试等
测试分析。结果表明，泄漏管道焊缝处的母材热影响区发生高温蠕变，同时管道变径部位存
在局部应力集中引发开裂。根据以上原因对焊缝裂纹的预防提出了合理可行的建议。
Abstract: Steam leakage of steam pipeline occurred in a coal chemical enterprise after 10 years service. In order to find the cause
of leakage and avoid such situation happening again, after the emergency shutdown of the pipeline, it cut offthe cracking parts and
carried out the detailed failure analysis. The cracking parts of steam pipeline were analyzed by macroscopic inspection, nondestructive
testing, chemical composition analysis, metallographic analysis, electron microscope analysis and mechanical properties
test. The results showed that high temperature creep occurred in the heat affected zone of the base material at the weld of the
leakage pipeline, and the cracking was caused by local stress concentration in the diameter reducing part of the pipeline. According
to the above reasons, it put forward the reasonable and feasible suggestions on the prevention of weld cracks.