理化检验-物理分册2013，Vol.49Issue(2)：123-126,129,5.
汽轮机抽汽疏水管焊缝开裂原因分析
Reasons Analysis on Cracking of Welding Seam of Drain Pipe of Stem Turbine Extraction
摘要
Abstract
Cracking leakage failure occurred at the welding seam of drain pipe of a steam turbine extraction in a power plant. By means of visual examination, chemical compositions analysis, metallographic examination and SEM analysis, the welding seam cracking reasons were analyzed. The result show that the welding seam contained high content of Cl and no post weld heat treatment implemented. By the combined action of Cl. residual stress and actual working stress, cracks emerged from inner wall of the drain pipe at the welding seam, and the cracks extended continuously from inner wall to outer wall which finally resulted in stress corrosion cracking of the dram pipe.关键词
疏水管/焊缝/应力腐蚀开裂Key words
drain pipe/ welding seam/ stress corrosion cracking分类
矿业与冶金引用本文复制引用
方可伟,罗坤杰,李岩,刘飞华..汽轮机抽汽疏水管焊缝开裂原因分析[J].理化检验-物理分册,2013,49(2):123-126,129,5.基金项目
大型先进压水堆核电站重大专项资助项目(2011ZX06004-009-0902) （2011ZX06004-009-0902）
