| 摘要 |
PROBLEM TO BE SOLVED: To provide a welding method by which a welded metal having a desired composition is obtained. SOLUTION: Base metal of 6,000 series alloy are welded together by using welding equipment in which two welding wires are fed out from a torch. A 4,000 series aluminum alloy member is used as a first welding wire and a 5,000 series aluminum alloy member is used as a second welding wire. The first wire is moved on an end part 3 and the second welding wire is moved on an aluminum alloy plate 1a. In this case, a welding position 12 with the first welding wire is always located at an advanced location from a welding position 13 with the second welding wire in terms of a welding direction 11. Namely, the positions of the tow welding wires are so decided that a straight line connecting the tip of the first welding wire and that of the second welding wire is inclined to the welding direction 11.
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