摘要
采用热电偶测量了X80钢管多道环焊接头焊接过程中的热循环,焊后采用盲孔法测量了焊接残余应力,建立了残余应力数值分析模型,并通过试验数据进行了校验,分析了层间温度偏离对残余应力的影响。研究结果表明:不同层间温度下,接头焊缝及热影响区拉应力较高,母材拉应力较低,在母材位置呈现拉-压应力转变。层间温度的改变对接头轴向应力的影响不明显,但对周向应力、等效应力的影响较大。当层间温度为248℃时峰值残余应力最低,考虑到经济和时间成本,生产实践中层间温度达到220℃时即可。
Thermocouple is used to measure the thermal cycle in the welding process of multipass girth welding joint of X80 steel pipe.After welding,residual stress is measured by blind hole method.The numerical analysis model of residual stress is established,and the effect of temperature deviation between layers on residual stress is verified by experimental data.The results show that at different interpass temperatures,the tensile stress in the weld and heat-affected zone is higher,while the tensile stress in base meta is lower,showing a pull-compression stress transition at the base metal position.The change of interpass temperature has no significant effect on the axial stress of the joints,but has a greater influence on the circumferential stress and the equivalent stress.Peak residual stress is lowest when the interlayer temperature is 248℃.Considering economic and time costs,the interpass temperature reaches 220℃in production practice.
作者
白咚咚
李霄
朱丽霞
牛辉
贾海东
席敏敏
BAI Dongdong;LI Xiao;ZHU Lixia;NIU Hui;JIA Haidong;XI Minmin(School of Material Science and Engineering,Xi'an Shiyou University,Xi'an 710065,China;Xi'an Key Laboratory of High Performance Oil and Gas Field Materials,Xi'an 710065,China;CNPC Tubular Goods Research Institute,Xi'an 710077,China;Chinese National Engineering Research Center for Petroleum and Natural Gas Tubular Goods Co.,Ltd.,Xi'an 710018,China;Baoji Petroleum Steel Pipe Co.,Ltd.,Baoji 721008,Shaanxi,China;Pipe Network Group(Xinjiang)United Pipeline Co.,Ltd.,Urumqi 830013,China)
出处
《焊管》
2023年第1期7-12,共6页
Welded Pipe and Tube
基金
中国石油天然气集团公司科技项目“油气田站场完整性管理技术研究”(项目编号CNPC2021DJ2804)。
关键词
X80钢管
环焊缝接头
残余应力
层间温度
多道焊
X80 steel pipe
girth welding joints
residual stress
interpass temperature
multipass welding
