理化检验-物理分册2016，Vol.52Issue(9)：670-674,5.DOI:10.11973/lhjy-wl201609019
Q235B钢循环水母管断裂原因分析
Causes Analysis on Fracture of a Q235B Steel Circulating Water Main Pipe
刘倩倩 1句光宇 1王志武1
作者信息
- 1. 武汉大学 动力与机械学院，武汉 430072
- 折叠
摘要
Abstract
A circulating water main pipe of Q235B steel in a 1 000 MW coal-fired power generation of a power plant fractured during operation.The fracture causes of the circulation water main pipe were analyzed by means of macroscopic inspection,chemical compositions analysis,mechanical properties testing,metallographic inspection, scanning electron microscope analysis,energy spectrum analysis and so on.The results show that:incomplete penetration phenomenon and inclusions,such as welding slag,welding beading and so on,existed in the welding seam of the circulating water pipe;low welding quality and abnormal microstructure caused poor bearing capacity of the welding seam.In the corrosion environment,cracks generated in the area of welding slag and expanded rapidly, resulting in the fracture failure of the circulating water main pipe.关键词
Q235B钢/循环水母管/焊缝/未焊透/腐蚀环境Key words
Q235B steel/circulating water main pipe/welding seam/incomplete penetration/corrosion environment分类
矿业与冶金引用本文复制引用
刘倩倩,句光宇,王志武..Q235B钢循环水母管断裂原因分析[J].理化检验-物理分册,2016,52(9):670-674,5.
