锅炉技术2023，Vol.54Issue(6)：58-61,4.
某超超临界机组末级过热器泄漏原因分析
Analysis on the Leakage of Final Superheater in a Ultra-Supercritical Unit
王万里 1刘俊建 1王齐宏 2李勇 1吴跃 1李卓廷2
作者信息
- 1. 大唐锅炉压力容器检测中心有限公司,安徽合肥 230088||大唐华东电力试验研究院,安徽 合肥 230088
- 2. 广东大唐国际潮州发电有限责任公司,广东潮州 521000
- 折叠
摘要
Abstract
Failure analysis on the final superheater tube that has experienced leakage is con-ducted.A comprehensive evaluation of the cause of tube leakage is conducted through macro-scopic examination,metallographic examination,hardness test,and SEM analysis.The re-sults indicate that:The leakage of the final superheater tube was caused by improper control of the forming process of the tube during the manufacturing process,resulting in a large number of axially distributed linear defects existed on the inner wall.The defect spreads to the inside of the tube during service,resulting in a great reduction in the effective wall thick-ness of the tube.With the aging of the pipe organization,the performance is gradually deteri-orated,which leads to a decrease in the pressure-bearing capacity of the tube.Finally,the unstable expansion of cracks leads to leakage,causing multiple cracks to expand,forming a skylight-shaped explosion.关键词
末级过热器管/失效分析/成型工艺/线性缺陷Key words
final superheater/failure analysis/forming process/linear defects分类
能源科技引用本文复制引用
王万里,刘俊建,王齐宏,李勇,吴跃,李卓廷..某超超临界机组末级过热器泄漏原因分析[J].锅炉技术,2023,54(6):58-61,4.
