焊管2016，Vol.39Issue(2)：44-50,7.DOI:10.19291/j.cnki.1001-3938.2016.02.010
焊接工艺对22 mm壁厚X80管道环焊缝冲击韧性的影响
Influence of Welding Technology on Circumferential Weld Impact Toughness of 22 mm Thickness X80 Pipeline
陈延清 1张建强 1牟淑坤 2刘宏 1张飞虎1
作者信息
- 1. 首钢技术研究院，北京 100043
- 2. 中国石油大学 北京，北京 102249
- 折叠
摘要
Abstract
In order to optimize the circumferential weld welding technology in the construction of 22 mm thickness X80 pipeline, adopting self-shielded flux cored wire semi-automatic welding technology, commonly used in pipeline laying, to study the influence of different welding heat input and welding bead arrangement on weld microstructure and impact toughness. The Results showed that within the studied range of the heat input, the welding bead arrangement has a little effect on the microstructure and impact toughness;when the heat input is higher than 16 kJ/cm, the impact toughness of weld metal declines sharply; when the heat input is in the range of 12~15 kJ/cm, the impact toughness of weld metal is the best. The research indicated that X80 self-shielded flux cored wire is sensitive to welding heat input, using 12~15 kJ/cm heat input can ensure impact toughness of weld metal meet the engineering technology requirements, at this moment the welding bead arrangement has no influence on weld metal.关键词
焊接热输入/自保护药芯焊丝/冲击韧性Key words
welding heat input/self-shielded flux cored wire/impact toughness分类
矿业与冶金引用本文复制引用
陈延清,张建强,牟淑坤,刘宏,张飞虎..焊接工艺对22 mm壁厚X80管道环焊缝冲击韧性的影响[J].焊管,2016,39(2):44-50,7.
