| 摘要 |
PROBLEM TO BE SOLVED: To provide flux-cored wire for electrogas arc welding with which an arc is made stable, and satisfactory welding operability and the high toughness of weld metal can be obtained in high heat input one pass welding for a thick steel plate. SOLUTION: The flux-cored wire for electrogas arc welding obtained by coring flux into an outer skin made of steel comprises, to the total mass of the wire, by mass, 0.01 to 0.10% C, 0.2 to 0.8% Si, 2.0 to 3.0% Mn, 0.05 to 0.80% Mo, 0.2 to 1.5% Ni, 0.10 to 0.40% Ti, 0.002 to 0.015% B, 0.05 to 0.50% of one or two kinds selected from Al and Mg, 0.1 to 0.5% NaF, and NaF-containing metal fluoride in 0.05 to 0.5% by a value expressed in terms of F, and the balance Fe with inevitable impurities. COPYRIGHT: (C)2006,JPO&NCIPI
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