| 摘要 |
PROBLEM TO BE SOLVED: To provide a flux cored wire for gas-shielded arc welding capable of materializing a weld metal capable of ensuring the strength of≥600 MPa at 0.2% proof stress (σ<SB>0.2</SB>) and the V-Charpy impact value vE<SB>-60</SB>of≥30J at -60°C, excellent in welding workability and optimum for a welding material of high-tensile steel. SOLUTION: In the flux cored wire for gas-shielded arc welding in which flux mainly consisting of TiO<SB>2</SB>flux is filled in a steel shell, Mg of≥0.01% by mass to the total mass of the wire is contained, the slug formed during the welding is TiO<SB>2</SB>-Al<SB>2</SB>O<SB>3</SB>-MgO slug. The composition of the slug is, by mass to the total mass of the slug,≥50% TiO<SB>2</SB>, 1.0-25% Al<SB>2</SB>O<SB>3</SB>, and 8-30% MgO. COPYRIGHT: (C)2009,JPO&INPIT
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