| 摘要 |
PROBLEM TO BE SOLVED: To provide a flux-cored wire for gas-shielded arc welding, which is used for welding a high tension steel plate having tensile strength in the class of≥950 MPa. SOLUTION: A flux-cored wire for gas-shielded arc welding that has high yield strength and high toughness contains, in a steel-made shell and a flux, as metal or alloy, in terms of total mass% based on the entire mass of the wire, 0.08-0.3% C, 0.2-2% Si, 0.5-2.5% Mn,≤0.02% P,≤0.01% S, 0.002-0.3% Al, 0.005-0.3% Ti, 0.5-11% Ni, 0.012-0.5% Mg, and one or more elements of 0.1-4% Mo, 0.1-3% W, 0.005-0.1% Nb, 0.005-0.5% V, and 0.005-0.5% Ta. Further, each of elements that affects hardenability, precipitation strengthening, and deoxidation is controlled by parameters. COPYRIGHT: (C)2008,JPO&INPIT
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