电力科技与环保2017，Vol.33Issue(2)：60-62,3.
1000MW超超临界机组高温再热器管弯头失效分析
Failure analysis on the elbow bursting of final stage reheater tube of 1000MW ultra-supercritical boiler
刘世刚 1黄桥生 1陈琨1
作者信息
- 1. 国电科学技术研究院,湖北 武汉 430000
- 折叠
摘要
Abstract
Through the analysis of the failure and the macroscopic examination, chemical composition analysis, microstructure analysis, hardness test, SEM energy spectrum analysis and mechanical properties test method,the reason of the elbow bursting of final stage reheater tube used in an ultra supercritical boiler of a power plant was analyzed.The results show that the elbow bending process of the formation of residual stress, and due to the back arc collision pits resulted in stress concentrated, pipes in the furnace and the hydraulic pressure test of starting and stopping subjected to impact loading, the toughness of the material decreased and grain boundary weakening effect, in the region of the grain boundary will the preferential formation of the crack source, and along the grain boundaries of development, through the failure due to the pipe wall.关键词
超超临界/高温再热器/HR3C/弯头/失效分析Key words
ultra-supercritical boiler/final stage reheater tube/HR3C/elbow/failure analysis分类
信息技术与安全科学引用本文复制引用
刘世刚,黄桥生,陈琨..1000MW超超临界机组高温再热器管弯头失效分析[J].电力科技与环保,2017,33(2):60-62,3.
