焊管2012，Vol.35Issue(6)：16-21,6.
X80螺旋埋弧焊管对接环焊接头失效裂纹分析
Cracking Reason Analysis on Circumferential Welded Joints of X80 SAWH Pipe
齐丽华 1刘小峰 2刘迎来 1刘润清 2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局第三工程分公司,郑州451450
- 折叠
摘要
Abstract
The cracking reason of X80 SAWH pipe circumferential welded joints in some pipeline construction was analyzed by chemical composition analysis, microstructure observation, and fracture morphology analysis . The results showed that, the crack, which appeared near butt weld toe of X80 SAWH pipe belongs to the welding cold crack, presents inter-granular and trans-granular cracking morphology. Welded joint hole, slag and much higher welding restraint stress are the main reason caused crack, and incorrect welding process is the direct reason. Full size circumferential preheating to steel pipe before welding is the principal method to prevent cracks.关键词
X80焊管/微观组织/环焊接头/焊接冷裂纹Key words
X80 welded pipe j microstructure/ circumferential welded joint/ welding cold cracking分类
矿业与冶金引用本文复制引用
齐丽华,刘小峰,刘迎来,刘润清,吉玲康,池强..X80螺旋埋弧焊管对接环焊接头失效裂纹分析[J].焊管,2012,35(6):16-21,6.
