宁夏电力Issue(2)：72-76,82,6.DOI:10.3969/j.issn.1672-3643.2025.02.011
1000MW超超临界锅炉高温再热器爆管原因分析
Analysis of tube burst in high-temperature reheater of 1 000 MW ultra-supercritical boiler
张宁1
作者信息
- 1. 深圳市深汕特别合作区华润电力有限公司,广东 深圳 518000
- 折叠
摘要
Abstract
An ultra-supercritical boiler has been in service for 26 000 h,and the high temperature reheater pipe made of S30432 material has exploded and leaked during the operation.Through macroscopic inspection,chemical elements analyses,mechanical properties tests,metallographic test,and energy spectrum analysis,and compared with adjacent pipes,the results show that the grain size of the failed pipe is too fine compared with that of the contrast pipe.Under the same high temperature service environment,the second phase precipitates and grows,forms into creep cavities.The metallographic structure is seriously aging,resulting in the material strength and plasticity decline,and finally when the finial strength of a steel pipe fails to meet the required service strength,the tube bursting occured.关键词
高温再热器/晶粒度/高温蠕变/强度Key words
high-temperature reheater/grain size/high temperature creep/intensity分类
动力与电气工程引用本文复制引用
张宁..1000MW超超临界锅炉高温再热器爆管原因分析[J].宁夏电力,2025,(2):72-76,82,6.
