Failure Analysis on Heating Surface Tube Crackof High Temperature Reheater in Station Boiler

Yun Jian Jiang; Xiang Feng Zheng; Rong Gang Xue; Guo Zhen Dong; Ji Feng Zhao; Wen Bin Li; Er Song Chen; Wen Peng Li; Qiang Wang

doi:10.4028/www.scientific.net/AMR.804.333

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 804Failure Analysis on Heating Surface Tube Crackof...

Failure Analysis on Heating Surface Tube Crackof High Temperature Reheater in Station Boiler

Abstract:

Through methods, such as microscope analysis, chemical analysis, metallography examination and scanning electron microscope etc, the causes resulting in high temperature reheater tube cracking of station boiler have been analyzed. The result indicates the crack is reheat crack, and structure stress, higher hardness and excessive welding residual stress are the primary inducement of tube joint crack.