API X65深水海底管道J形铺设横向焊接变形  

Horizontal welding deformation of API X65 pipe in deep water J-laying

作　　者：李明朝 李光泉 周灿丰[3] 陈智[3] 周珍珍 Li Mingzhao;Li Guangquan;Zhou Canfeng;Chen Zhi;Zhou Zhenzhen(Research Institute of Drilling Technology,Sinopec Shengli Petroleum Engineering Co.,Ltd.,Dongying 257017,Shandong,China;Sinopec Oilfield Service Corporation,Beijing 100000,China;Beijing Institute of Petrochemical Technology,Research Center of Energy Engineering Advanced Joining Technology,Beijing 102617,China;Harbin Welding Institute Limited Company,Harbin 150028,China)

机构地区：[1]中石化胜利石油工程有限公司钻井工艺研究院,山东东营257017 [2]中石化石油工程技术服务有限公司,北京100000 [3]北京石油化工学院,能源工程先进连接技术研究中心,北京102617 [4]哈尔滨焊接研究院有限公司,哈尔滨150028

出　　处：《焊接》2020年第6期12-17,61,62,共8页Welding & Joining

基　　金：国家自然科学基金项目(51305037);北京市自然科学基金项目(KZ201210017017)。

摘　　要：对深水海底管道铺设中关键的GMAW自动焊焊接应力与变形进行了研究,其工艺特点是背面不加衬垫、窄坡口、横向位置焊接。在焊接应力与变形理论分析的基础上,以SYSWELD软件为工具,提取焊缝截面平均热循环曲线作为多道焊的加载热源,对与管道厚度、坡口参数相同的API X65板材进行了多道焊焊接变形与应力分布数值仿真,搭建横向自动焊接试验系统进行了多道焊焊接验证。研究结果表明,最终焊接变形的数值模拟结果与试验结果大致吻合,二者之间存在的误差主要源于热流分布、二维截面模型的计算精度、约束及热循环曲线的自身特点等因素;在多道焊焊接过程中,前几层焊缝对最终焊接变形影响大,而后几层焊缝产生的影响小,其原因是前几层焊接中焊接的基础变形大,而后几层焊接中残余应力释放产生的变形补偿明显地抵消了一部分焊接变形。The welding stress and deformation of GMAW automatic welding that was the key in deep-water offshore pipeline laying were researched,which had process features of without backing,narrow groove and transverse welding.On the basis of theoretical analysis of welding stress and deformation,the average thermal cycle curve of weld cross-section was extracted as the loading heat source of multi-pass welding with SYSWELD software as a tool,Numerical simulation of multi-pass welding deformation and stress distribution of API X65 plate with the same pipe thickness and groove parameters was carried out,and a transverse automatic welding test system was set up for multi-pass welding verification.The results showed that the numerical simulation results of the final welding deformation were in good agreement with the experimental results,and the errors between them were mainly due to heat flow distribution,calculation accuracy of the two-dimensional cross-section model,constraints and the characteristics of the thermal cycle curve.In the process of multi-pass welding,the first few layers of welds had great influence on the final welding deformation,while the latter few layers of welds have little influence,which was due to the large basic deformation in the first few layers of welding,and the deformation compensation caused by the release of residual stress in the latter few layers of welding obviously offset a part of the welding deformation.

关 键 词：横向焊接 热循环曲线 应力与变形 API X65管线钢板 J形铺设 

分 类 号：TG402[金属学及工艺—焊接]