Y型坡口免清根埋弧焊接法研究

Research on Submerged Arc Welding without Back Chipping Technology on Y-shaped Groove

为改善埋弧焊的工作环境和提高生产效率,提出了Y型坡口免清根埋弧焊接法。运用实心焊丝气体保护焊进行打底焊接,埋弧焊填充盖面论证了Y型坡口四种免清根试验方案。结果表明,无间隙、有间隙正面打底和有间隙反面打底焊接的焊缝成形良好,接头具有较高的抗拉强度和良好的韧性,而无间隙反面打底焊接出现未焊透现象。

In order to improve the working environment and productivity of SAW, the SAW without back chipping technology on Y-shaped groove is proposed. By applying the solid wire gas shielded welding as backing weld and the SAW as filling and cover welding, four tes- ting programs for Y-shaped groove are demonstrated. The result shows that the welding seams are well-formed by gapless and gaps of positive backing weld and gaps of opposite back- ing weld, the joints has better tensile strength and higher toughness. The phenomenon of in- complete penetration is appeared in gapless of opposite backing weld.