焊管2013，Vol.36Issue(1)：54-59,6.
站场螺旋焊管环焊缝接头失效原因分析
Cracking Reason Analysis on Circumferential Welded Joints of Spiral Submerged Arc Welded Pipe
齐丽华 1刘小峰 2刘润清 2刘迎来 1吉玲康 1池强1
作者信息
- 1. 中国石油集团石油管工程技术研究院,西安710065
- 2. 中国石油天然气管道第三工程分公司,河南中牟451450
- 折叠
摘要
Abstract
The circumferential welded joints cracking reason of spiral submerged arc welded pipe in certain station was analyzed by chemical composition analysis, mierostmcture observation, fracture morphology analysis. The results showed that the crack appeared near butt weld toe of pipeline was the welding cold crack, which presents intergranular and transgranular cracking morphology. The failed fusion defects near the welding beading of backing welding was the direct cause of the cracks. Improper welding process and excess intermediate welding heat input leaded to granular bainite coarse and resulted in crack extension. Excellent weld shape and smaller welding heat input should be the main way of preventing the crack generation and extension.关键词
螺旋焊管/环焊接头/微观组织/焊接冷裂纹Key words
spiral welded pipe/ welded joints/ mierostmcture/ welding cold cracking分类
矿业与冶金引用本文复制引用
齐丽华,刘小峰,刘润清,刘迎来,吉玲康,池强..站场螺旋焊管环焊缝接头失效原因分析[J].焊管,2013,36(1):54-59,6.
