| 摘要 |
Provided is a multielectrode gas-shield arc welding method which generates small amounts of spatters which has good familiarity, which has a good welded metal state, and which enables deep weld penetration. In the multielectrode gas-shield arc welding method to weld metal by applying wires for gas-shield arc welding to a leading electrode (11) and a following electrode (21) and inserting a filler wire (31) in a molten metal (8) between the leading electrode (11) and the following electrode (21); a pole pitch between the leading electrode (11) and the following electrode (21) is 15-50 mm, a welding voltage (V_L) (V) of the leading electrode (11) is 26-38 V, and a welding current (I_L) (A) of the leading electrode (11) is 250-550 A. A relation between the welding voltage (V_L) (V) and the welding current (I_L) (A) satisfies 56 <= V_L·10^3/I_L <= 100. With respect to the leading electrode (11), a relation between a wire diameter (R_L) (mm) and a wire protrusion length (E_L) (mm) satisfies 5 <= E_L/R_L <= 20. According to the present invention, the current of straight polarity flows into the filler wire (31) to weld the metal. |
