Failure Analysis on High Temperature Reheater Tube of T23 Steel in a 660MW Thermal Power Plant Boiler

2019 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

无线电电子学;计算机科学;材料科学

Zhong, Jiao^1 ; Ke, Hao^1 ; Wang, Xi^1 ; Han, Jing^1 ; Wang, Bo^2 ; Yu, Chao^2 ; Huang, Hai^2 ; Xie, Tao^2 ; Wu, Gang^2 ; Kang, Xudong^2

Huadian Electric Power Research Institute Co. Ltd, Hangzhou

310030, China^1

Hubei Huadian Xiangyang Power Generation Co. Ltd., Xiangyang, 441021, China^2

关键词: High temperature;    Long-term overheating;    Longitudinal cracks;    Microstructural examination;    Reheater tubes;    Supercritical units;    Thermal power plants;    Visual examination;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/563/3/032002/pdf
DOI  :  10.1088/1757-899X/563/3/032002

来源: IOP

【 摘 要 】

The cause of the failure of high temperature reheater tube of T23 Steel in 600MW supercritical unit of a power plant was analysed by visual examination, chemical analysis, microstructural examination, and mechanical property test (at room temperature). The results showed that the cause of reheater tube failure was a long-term overheating over 570 °C (in the furnace), which led to its mechanical properties to decrease, resulting in the tube burst with the longitudinal crack ruptures.