基于旋转电弧的窄间隙横焊打底工艺  

Backing process of narrow gap horizontal welding based on rotary arc

作　　者：张明泽 罗雨[1] 叶朔朔 苏佳毅 于俊杰 Zhang Mingze;Luo Yu;Ye Shuoshuo;Su Jiayi;Yu Junjie(Beijing Higher Institution Engineering Research Center of Energy Engineering Advanced Joining Technology,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]北京石油化工学院,能源工程先进连接技术北京市高等学校工程研究中心,北京102617

出　　处：《焊接》2024年第6期17-25,共9页Welding & Joining

基　　金：国家自然科学基金资助项目(51305037,52175286)。

摘　　要：【目的】J型铺设是最适合深水的海底管线铺设和海洋立管安装方法,常采用管道自动焊接装备完成横向环焊缝摆动焊接。针对摆动电弧P-GMAW横焊打底层焊缝成形不对称、背部成形一致性差等问题,提出了基于旋转电弧的窄间隙横焊表面张力过渡(Surface tension transfer,STT)打底工艺方法。【方法】以X65管线钢板材对接窄坡口为试验对象,模拟深水立管J型铺设焊接过程。【结果】基于Minitab的田口方法,建立了正交试验模型,通过焊接工艺试验,探究窄间隙横焊STT打底层焊接工艺规范及不同工艺参数组合对焊缝成形的影响规律。【结论】打底层焊缝背部成形一致性好,无未熔合、未焊透等缺陷。[Objective]J-laying is the most suitable method for laying submarine pipelines and installing Marine risers in deep water.Automatic pipeline welding equipment is often used to complete horizontal girth weld by swing welding.For problems such as asymmetrical formation and poor consistency of back formation in backing weld by swing arc P-GMAW horizontal welding,backing process method of narrow gap horizontal welding surface tension transition(STT)based on rotary arc was proposed.[Methods]X65 pipeline steel sheet butt narrow bevel was taken as the test object,welding process of deep water riser J-lay was simulated.[Results]Based on Minitab-based Taguchi method,an orthogonal test model was established.Through welding process test,influence of backing process specifications of narrow gap horizontal welding STT and different combinations of welding parameters on law of weld formation was explored.[Conclusion]Back formation of backing weld had good consistency without incomplete fusion,incomplete penetration and other defects.

关 键 词：旋转电弧焊 窄间隙横焊 打底工艺 田口方法 正交试验 

分 类 号：TG444.3[金属学及工艺—焊接]