SUBMERGED ARC WELDING METHOD FOR STEEL SHEETS

摘要

Provided is a submerged arc welding method enables: welds with high toughness to be provided with low input heat; deep penetration; and a wide bead width to be sufficiently obtained in the welding of thick materials such that the welding speed is not more than 3 m/minute. The wire diameter of a first electrode at the head in the welding direction is established at 3.9 to 4.1 mm. Two electrodes are positioned on both sides of a weld line at the tail end in the welding direction. Wire tip positions of the two electrodes on the surface of a steel sheet are positioned on the same line, which is perpendicular to the weld line, and the distance (W) (mm) between the wire tip positions and the weld line is established at 5 to 20 mm.