Papers by Keyword: Final Superheater Header

Paper TitlePage

Authors: Xiang Feng Zheng, Yan Ting Feng, Xiao Guang Niu, Qing Wang, Xiao Jun Hao, Wen Bin Li, Xue Xia Xu, Peng Sun
Abstract: 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.
615
Authors: Xiao Guang Niu, Qing Wang, Xiang Feng Zheng, Xue Xia Xu, Hui Fan, Wen Bin Li, Yan Ting Feng, Yun Jian Jiang, Xiao Jun Hao, Yang Jie Ou
Abstract: Through methods, such as microscope analysis, metallographic examination, the crack located nearby the fusion line between tee joint and outlet steam pipe of subcritical power station boiler final superheater header is reheat crack (the main crack occurred in the heat affected zone and extended along the fusion line and grain boundary in HAZ. There are many small cracks paralleling with main crack). The base metal material (12Cr1MoV) and excessive welding residual stress are the primary inducement of crack. In repair crack, the measures of reducing residual stress, such as lower welding heat input, reducing thickness of welding layer, hammer blowing, assigning reasonably heat treatment power ,lengthening holding time and so on, were taken. The welding repair succeeded greatly.
96
Showing 1 to 2 of 2 Paper Titles