一、前言 许多钢厂冷轧车间带钢短坯料,轧制前需并焊成大卷,并在首尾焊上引带,以便进行连续轧制。带钢并接,特别是高合金钢和不锈钢的并接,国内大都采用钨极氩弧焊TiG。TiG焊是一种比较成熟的焊接方法,操作简便,焊缝接头性能好,尤其适用于薄带的连接。在不开坡口的情况下,能一次焊透, I. INTRODUCTION Many steel mills have short strip blanks in the cold rolling mill, which are welded and rolled into large rolls before rolling. The strip is welded on both ends for continuous rolling. Strip and then, especially the high alloy steel and stainless steel in parallel, most of the domestic use of TIG welding TiG. TiG welding is a relatively mature welding method, easy to operate, weld joint performance is good, especially for the ribbon connection. In the case of no groove, to a penetration,