X70管道内壁双相不锈钢热丝TIG堆焊工艺  

Hot-wire TIG surfacing process with duplex stainless steel on inside wall of X70 pipe

作　　者：许小波[1] 肖德明[1] 张念涛[1] 肖易萍[1] 郭兴伟[1] 邢攸为 傅延波 

机构地区：[1]海洋石油工程股份有限公司,天津市300452

出　　处：《焊接》2015年第12期39-42,71,共4页Welding & Joining

基　　金：国家科技重大专项基金支助项目(2011ZX05027-004)

摘　　要：采用热丝TIC焊方法系统地研究了焊接电流、电弧电压、焊接速度、钨极倾斜角度对双相不锈钢2209堆焊X70钢管道内壁成形的影响,并且分析了焊接过程巾的氧化问题。研究结果表明:随着焊接电流增大,堆敷层宽度增大,咬边明显减少;电弧电压与钨极倾斜角度的匹配对焊接过程的顺利进行起着至关重要的作用;随着焊接速度增加,堆敷层高度减小。管道内壁堆焊过程中,由于热量的累积效应,氧化甚至氮化问题变得尤为突出,冷却或充氩是解决氧化问题的有效方法。最优参数下的堆敷层金属具有良好的抗点蚀性能。The effects of welding current,arc voltage,welding speed,the angle of tungsten electrode on the duplex stainless steel 2209 layer appearance deposited on inside wall of X70 pipeline steel by hot-wire TIG welding were studied systematically,and the oxidization in the welding process was analyzed.The results show that the weld width increases and the undercut decreases markedly with the increase of welding current.The matching of arc voltage and the angle of tungsten electrode is of great importance to the welding process.With the increase of welding speed,the reinforcement decreases.The oxidization even nitridation is more serious because of the energy accumulation in the pipe inner wall surfacing and cooling or argon protect is an effective method for the oxidation problem.The pitting corrosion properties of the clad metal at the optimum parameter is good.

关 键 词：堆焊工艺 双相不锈钢 管线钢 点蚀 

分 类 号：TG444[金属学及工艺—焊接]