GAS-SHIELDED ARC WELDING METHOD

摘要

The present invention relates to a gas shielded arc welding method for feeding a consumable electrode via a welding torch and performing welding while a shielding gas is flowing, wherein the welding torch includes a nozzle, the inside diameter of the nozzle is 15 mm or greater, the nozzle-base metal distance between the tip of the nozzle and material to be welded is 22 mm or less, and a ratio expressed by (inside diameter of nozzle/nozzle-base material distance) is 0.7 - 1.9. Thus, it is possible to suppress oxidation on bead surfaces directly after welding or oxidation when atmospheric air is drawn in and reduce slag while increasing the atmospheric shielding effect by the shielding gas.