油气管道激光电弧焊工艺安全条件研究与应用  

Research and Application of Safety Conditions ofLaser Arc Welding of Oil and Gas Pipelines

作　　者：陈自振 李天伟 任建志 韩卫亮 范伟 Chen Zizhen;Li Tianwei;Ren Jianzhi;Han Weiliang;Fan Wei(SINOPEC Henan Oil Construction Engineering Co.Ltd.,Henan,Zhengzhou,450000;SINOPEC Petroleum Engineering&Construction Corporation,Beijing,100020)

机构地区：[1]中石化河南油建工程有限公司,河南郑州450000 [2]中石化石油工程建设公司,北京100020

出　　处：《安全、健康和环境》2023年第2期22-27,共6页Safety Health & Environment

基　　金：中石化石油工程技术服务有限公司科研专项(SG21-44K、SG19-32K),特殊条件下管道全自动焊接技术的应用研究。

摘　　要：针对焊接工艺参数超出安全条件时,焊缝会出现应力集中、疲劳开裂的问题,采用SYSWELD软件建立了激光电弧焊X80钢板有限元模型,分析了焊接速度与预热温度对焊缝质量的影响。发现随着焊接速度的增加,纵向残余应力先降低后增加,现场可由最小残余应力确定安全焊接速度。安全焊接速度与预热温度有关,结合硬度可确定安全预热温度。以中俄东线黑河-长岭段天然气管道为研究对象,确定了现场安全焊接速度为2.6 m/min,安全预热温度为100℃,为现场油气管道激光电弧焊提供理论指导。Aiming at the problems of stress concentration and fatigue cracking when welding process parameters exceed safety conditions,a finite element model of laser arc welding X80 steel plate was established by SYSWELD software,and the influence of welding speed and preheating temperature on the welding seam quality was analyzed.It was found that with the increase of welding speed,the longitudinal residual stress decreased first and then increased,and the safe welding speed could be determined by the minimum residual stress on site.The safe welding speed was related to the preheating temperature,and the safe preheating temperature could be determined in combination with the hardness.Taking the natural gas pipeline in the Heihe-Changling section of the Sino-Russian eastern route as the research object,the on-site safe welding speed was 2.6 m/min and the safe preheating temperature was 100℃,providing theoretical guidance for on-site laser arc welding of oil and gas pipelines.

关 键 词：激光电弧焊 安全焊接速度 安全预热温度 焊缝硬度 残余应力 油气管道 

分 类 号：TE88[石油与天然气工程—油气储运工程]