In the process of submerged arc welding of spiral slits,welding defects may occur because the oxidized iron sheets in the course of welding may cause messy welding seams.

• 在螺旋缝埋弧焊生产过程中,由于带钢表面氧化铁皮进入焊接过程,往往会造成焊缝夹杂,出现焊接缺陷。