脉冲埋弧焊技术在X80钢焊接中的应用  

Application of pulse submerged arc welding technology in the X80 alloy steel weld

作　　者：李桓[1,2] 高莹[1,2] 张晓强[3] 李君佐[3] 董军[3] 黄宗仁[1,2] 杨鑫鑫[1,2] 

机构地区：[1]天津大学材料科学与工程学院,天津300072 [2]天津市现代连接技术重点实验室,天津300072 [3]中国石化集团江汉石油管理局沙市钢管厂,湖北荆州434000

出　　处：《电焊机》2009年第1期54-57,共4页Electric Welding Machine

基　　金：国家自然科学基金资助项目(50505048);天津市科学基金面上项目资助项目(07JCYBJC044000)

摘　　要：为提高X80级钢管的焊接效率,必须加大埋弧焊接电流,然而这会导致焊缝区晶粒长大及相关性能下降。脉冲埋弧焊工艺通过改变加热方式并利用脉冲电流的震荡作用细化焊缝组织的晶粒,从而提高焊接接头的性能。利用林肯DC1500焊机与自行开发的脉冲控制器构建了应用于钢管制造的脉冲埋弧焊接系统,通过试验对比,发现经脉冲电流焊接的接头具有更细的晶粒,显示了脉冲埋弧焊技术在制管行业应用推广的前景和优势。In order to improve the efficiency of X80 pipe welding,the welding current will be increased inevitably for normal submerged arc welding technology.It will make the coarse grain of welding-seam, and property of welding seam will decrease.The pulse submerged arc welding technology can refine grain size of weld-seam by changing the heating mode and the periodical vibration of pulse current.The pulse submerged are welding system for X80 has been established by using Lincoln weld machine and selfdeveloped pulse welding controller.Through check experiment,the lesser grain size can be received by pulse submerged arc welding, it shows the advantage of this technology.

关 键 词：脉冲 X80 埋弧焊 高效化焊接 

分 类 号：TG445[金属学及工艺—焊接] TG457.11