Failure Analysis on Tee Joint Crack of Subcritical Power Station Boiler Final Superheater Header
Through methods, such as microscope analysis, mechanical analysis, chemical analysis, metallographic examination, the causes resulting in tee joint crack of subcritical power station boiler final superheater header (12Cr1MoV) have been analyzed. The result indicates the tee joint crack is reheat crack, and irrational structure and excessive welding residual stress are the primary inducement of tube joint crack.
X. F. Zheng et al., "Failure Analysis on Tee Joint Crack of Subcritical Power Station Boiler Final Superheater Header", Advanced Materials Research, Vols. 311-313, pp. 615-618, 2011