母材成分对X80管线钢管道环焊接头冲击韧性的影响  

Effect of Composition on Weld Impact Toughness of X80 Pipeline Steel by Girth Welding

作　　者：陈延清[1] 张建强[1,2] 牟淑坤[1] 刘宏[1] 张飞虎[1] 

机构地区：[1]首钢技术研究院 [2]中国石油大学

出　　处：《首钢科技》2016年第5期23-30,共8页Shougang Science and Technology

摘　　要：采用管线铺设过程中的自保护药芯焊丝半自动焊焊接工艺，研究了母材中铌含量对X80管线钢环焊接头冲击韧性的影响。结果表明，母材成分对焊缝金属成分有影响，母材中较高的铌含量过渡到焊缝金属中，促进了焊缝金属中M／A岛的形成和含量的增加，影响了焊缝金属的冲击韧性及稳定性。The self-protection flux cored wire and semi-automatic welding technology in the process of pipe laying were employed to study the effect of Nb in base metal on weld impact toughness of X80 pipeline steel. The Results show that the composition of base metal impacts on the composition of weld metal. Nb in base metal transfers to weld metal during the welding process. It accelerates the formation of MA and increases the quantity of MA. Finally, it affects the impact toughness and stability of welds.

关 键 词：环焊缝 自保护药芯焊丝 冲击韧性 

分 类 号：TG142.41[一般工业技术—材料科学与工程]