管子对接全位置TIG氦弧内焊工艺研究  

Tube to tube all position helium arc internal butt welding

作　　者：费大奎[1] 张焱[1] 于丹[1] 杜兵[1] 

机构地区：[1]机械科学研究院哈尔滨焊接研究所,150028

出　　处：《焊接》2014年第7期66-69,75,共4页Welding & Joining

摘　　要：对于壁厚为4mm的小口径管道TIG全位置对接内焊,采用氦弧焊Ⅰ型坡口单面焊双面成型.结合试验,通过对峰值电流、基值电流、焊接速度、电弧电压的优化,解决仰焊焊缝塌陷及下坡焊未焊透的问题,得出最佳工艺.最佳工艺分为4个区,焊接速度75 mm/min、峰值电流114～ 130 A、基值电流58 ～62 A、送丝速度0.45 ～0.6m/min、电弧电压13.4～ 14.0 V.试验表明,在管道全位置TIG对接既不能外焊又不能摆动的情况下,氦弧内焊不失为一种理想选择.For 4 mm thickness small tube all position butt helium-arc welding with I type groove can realize one-side welding with back formation.By optimizing pulse current,background current,wire feed speed,arc voltage,the problems of welding seam collapse in the position of overhead and downhill welding seam lack of penetration are solved.At last,the best welding technology with welding speed of 75 mm/min,pulse current range from 114 A to 130 A,background current range from 58 A to 62 A,wire feed speed range from 0.45 m/rain to 0.6 m/rain,arc voltage range from 13.4 V to 14.0 V are found.

关 键 词：TIG全位置焊 氦弧内焊 焊缝塌陷 

分 类 号：TG422[金属学及工艺—焊接]