理化检验-物理分册2026，Vol.62Issue(4)：46-50,5.DOI:10.11973/lhjy-wl250011
二级过热器T91钢管泄漏原因
Reasons for leakage of T91 steel tube in the secondary superheater
姚宇峰 1杨军胜2
作者信息
- 1. 陕西延长石油富县发电有限公司,延安 727500
- 2. 陕西清水川能源股份有限公司,榆林 719405
- 折叠
摘要
Abstract
During the 168-hour trial operation of a power plant,a bursting and leakage accident occurred in the secondary superheater.The reasons for the tube explosion were analyzed using methods such as macroscopic observation,geometric dimension measurement,chemical composition analysis,mechanical property testing,metallographic examination,scanning electron microscopy and energy spectrum analysis.The results show that there were two original crack defects on the T91 steel pipe,one of which was a longitudinal crack defect with a length of about 200 mm near the explosion and a depth of about 5.6 mm.Another crack surface was located at a depth of approximately 5.6 mm at the explosion site.During the 168-hour trial operation of the unit,the boiler experienced multiple start-stop and load changes,causing drastic changes in the temperature and pressure of the heating surface,leading to continuous crack propagation and ultimately resulted in a pipe-burst accident.关键词
T91钢管/裂纹/泄漏/爆管/显微组织Key words
T91 steel pipe/crack/leak/burst/microstructure分类
通用工业技术引用本文复制引用
姚宇峰,杨军胜..二级过热器T91钢管泄漏原因[J].理化检验-物理分册,2026,62(4):46-50,5.
