| 摘要 |
In a tandem gas-shielded arc welding method, carbon dioxide is used as a shielding gas for a leading electrode formed by a solid wire, an argon-carbon dioxide gas mixture containing at least 60% by volume of argon gas is used as a shielding gas for a trailing electrode formed by a solid wire or a flux-cored wire, both the leading electrode and the trailing electrode have a reverse polarity, the leading electrode satisfies the relationships "5.00 ‰¤ (I·V·10 -8 )/(Wf·Àr 2 ) ‰¤ 10.00" and "(I 2 ·10 -3 )/V ‰¥ 4.50", and the trailing electrode satisfies the relationships "4.00 ‰¤ (I·V·10 -8 )/(Wf·Àr 2 ) ‰¤ 7.00" and "(I 2 ·10 -3 )/V ‰¥ 8.00". |
