焊管
銲管
한관
Welded Pipe and Tube
2015年
11期
41-43,68
,共4页
焊管%X80%焊接%焊条电弧焊%根焊道%操作要点
銲管%X80%銲接%銲條電弧銲%根銲道%操作要點
한관%X80%한접%한조전호한%근한도%조작요점
welded pipe%X80%welding%electrode arc welding%root welding bead%operation points
目前我国大直径长输管道大部分采用X80管线钢， X80钢根焊道的焊接常采用管道全位置自动焊、 STT和RMD半自动焊、钨极氩弧焊以及焊条电弧焊等工艺。管道全位置自动焊设备昂贵、适应性差。 STT和RMD半自动焊焊接时灵活性较差，必须严格防风措施。钨极氩弧焊的抗风能力差且焊接效率太低。低氢焊条电弧焊虽操作难度大且焊接效率不高，但灵活性强、焊接接头力学性能好且设备简单，适应于返修、连头和不良地段的焊接。详细介绍了X80管线钢低氢焊条根焊焊道的焊前准备、焊接操作技术及焊接工艺参数。
目前我國大直徑長輸管道大部分採用X80管線鋼， X80鋼根銲道的銲接常採用管道全位置自動銲、 STT和RMD半自動銲、鎢極氬弧銲以及銲條電弧銲等工藝。管道全位置自動銲設備昂貴、適應性差。 STT和RMD半自動銲銲接時靈活性較差，必鬚嚴格防風措施。鎢極氬弧銲的抗風能力差且銲接效率太低。低氫銲條電弧銲雖操作難度大且銲接效率不高，但靈活性彊、銲接接頭力學性能好且設備簡單，適應于返脩、連頭和不良地段的銲接。詳細介紹瞭X80管線鋼低氫銲條根銲銲道的銲前準備、銲接操作技術及銲接工藝參數。
목전아국대직경장수관도대부분채용X80관선강， X80강근한도적한접상채용관도전위치자동한、 STT화RMD반자동한、오겁아호한이급한조전호한등공예。관도전위치자동한설비앙귀、괄응성차。 STT화RMD반자동한한접시령활성교차，필수엄격방풍조시。오겁아호한적항풍능력차차한접효솔태저。저경한조전호한수조작난도대차한접효솔불고，단령활성강、한접접두역학성능호차설비간단，괄응우반수、련두화불량지단적한접。상세개소료X80관선강저경한조근한한도적한전준비、한접조작기술급한접공예삼수。
At present, X80 pipeline steel mostly was used in large diameter long-distance pipeline in China. In X80 steel root welding, it usually adopts all position automatic welding, STT and RMD semi-automatic welding, tungsten argon arc welding, shielded metal arc welding, etc. The equipment of pipeline all position automatic welding is expensive, poor adaptability;windproof measures must be strictly controlled in STT and RMD semi-automatic welding;The poor ability to resist the wind for tungsten argon arc welding and its welding efficiency is too low. Although high operation difficulty and low welding efficiency for low hydrogen electrode arc welding, but it is with good flexibility and simple equipment, the mechanical properties of welded joint are good, suitable for welding repair, butt welding and welding in bad location. In this article, it detailedly introduced preparation before welding, welding technology and welding parameters for X80 pipeline steel low-hydrogen electrode root welding bead.
