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(rèn)為用手工氬弧焊進(jìn)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(duì)噴嘴、規(guī)范參數(shù)、坡口形式等作了相應(yīng)改進(jìn)，使雙套管、聯(lián)箱、集氣管的焊接全部實(shí)現(xiàn)了鎢極氬弧焊打底，從而提高了雙套管廢熱鍋爐的質(zhì)量。