近几年来,大厚度低合金钢板的日益普遍采用,要求研制一种生产率高、成本低、焊接变形小、焊缝及热影响区机械性能好的焊接方法,以在一定的场合下代替埋弧焊与电渣焊。窄间隙脉冲氩弧焊,就是在这种生产实践需要的条件下,研制成功的一种比较理想的大厚度焊接法。脉冲氩弧焊,是六十年代在工业中应用的一种气体保护焊接法。它能够以较小的焊 In recent years, the increasingly common use of large-thickness low alloy steel requires the development of a high productivity, low cost, small welding deformation, weld and heat affected zone mechanical properties of a good welding method to replace the submerged arc Welding and electroslag welding. Narrow gap pulse welding, is the production of such conditions required under the conditions of the successful development of a more ideal thick welding method. Pulse argon arc welding, is the sixties in the industrial application of a gas protection welding method. It can be welded with less