backing weld

基本解釋

The laser beam melts a portion of the steel core and the segment backing metal, forming a weld.
激光光束熔體部分鋼鐵核心和后盾金屬部分，形成焊縫。
Welding methods and technology of narrow gap quirk backing weld were discussed. Indirect quirk backing weld using manual hydrogen arc welding is considered as the best result.
討論了窄間隙深槽打底焊焊接方法和工藝，認為用手工氬弧焊進行單面深槽打底焊效果最好。
They cause all the welding of double tubes, joint boxes and gas-collecting tubes to realize the backing weld of TAW-P. The quality of the double tube waste heat boilers have been improved.
并對噴嘴、規(guī)范參數(shù)、坡口形式等作了相應改進，使雙套管、聯(lián)箱、集氣管的焊接全部實現(xiàn)了鎢極氬弧焊打底，從而提高了雙套管廢熱鍋爐的質量。