焊管2011，Vol.34Issue(8)：13-16,4.
F52法兰/X52接管环焊接头开裂原因浅析
Cracking Reason Analysis on Circumferential Welding Joints of F52 Flange and X52 Welded Pipe Butt Welding
牛靖 1刘迎来 2王鹏 1齐丽华 1冯耀荣 1吉玲康 2张建勋1
作者信息
- 1. 中国石油天然气集团公司管材研究所,西安,710065
- 2. 西安交通大学材料学院与工程学院,西安,710049
- 折叠
摘要
Abstract
The circumferential welding joints cracking reason of F52 flange and XS2 welded pipe butt welding in some pipeline station was analyzed by chemical composition analysis, microstructure observation and fracture appearance analysis. The results showed that the crack which appeared near weld zone of F52 flange side belongs to welding cold cracking during backing welding, because its fracture appearance presents intergranular and transgranular fracture. The coarse martensite near weld zone of flange side is main reason which leads to crack; the improper welding process is direct inducement for crack. Controlling chemical composition of F52 flange and preheating before backing welding are the principal methods to prevent cracks.关键词
F52法兰/微观组织/环焊接头/焊接冷裂纹Key words
FS2 flange/ microstructure/ circumferential welding joint, welding cold cracking分类
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牛靖,刘迎来,王鹏,齐丽华,冯耀荣,吉玲康,张建勋..F52法兰/X52接管环焊接头开裂原因浅析[J].焊管,2011,34(8):13-16,4.
