目前双丝埋弧焊越来越广泛的应用,其高熔敷率带来了较高的焊接速度,但也容易造成熔池熔深大,焊缝区域晶粒粗大,焊缝形状差,焊缝的韧性和塑形性能差等焊接缺陷。提出了窄间隙焊接工艺,减少金属的熔敷率,采用三丝焊接。该方案即满足了提高焊接效率又可以有效的改善焊缝质量,降低焊接变形,大幅降低成本。 Currently double-wire submerged arc welding more and more widely used, the high deposition rate has led to a higher welding speed, but also easily lead to molten pool deep penetration, coarse grain weld area, the weld shape is poor, welding Seamless toughness and shaping poor welding defects. Proposed a narrow gap welding process to reduce the rate of metal deposition, the use of three wire welding. The solution meets the requirements of improving welding efficiency, improving weld quality, reducing welding distortion and greatly reducing cost.