FLUX-CORED WIRE FOR Ar-CO2 MIXED GAS SHIELDED ARC WELDING

摘要

A wire including, in terms of % by mass with respect to a total mass of the wire, as a total in a steel outer skin and a flux, 0.03 to 0.08% of C, 0.1 to 0.6% of Si, 1.2 to 2.5% of Mn, 0.01 to 0.5% of Cu, 0.5 to 1.5% of Ni, 0.05 to 0.5% of Ti, 0.002 to 0.015% of B, and 0.05% or less of Al, and further including, in the flux, 4 to 8% in terms of TiO2, 0.1 to 0.6% of in terms of SiO2, 0.02 to 0.3% in terms of Al2O3, 0.1 to 0.8% of Mg, 0.05 to 0.3% in terms of F, 0.05 to 0.3% in terms of Na and K in a fluorine compound, 0.05 to 0.2% of Na2O and K2O, and 0.2% or less in terms of ZrO2.

主权项

1. A flux-cored wire for Ar—CO2 mixed gas shielded arc welding obtained by filling a flux into a steel outer skin, comprising;
in terms of % by mass with respect to a total mass of the wire, as a total in the steel outer skin and the flux, 0.03 to 0.08% of C; 0.1 to 0.6% of Si; 1.2 to 2.5% of Mn; 0.01 to 0.5% of Cu; 0.5 to 1.5% of Ni; 0.05 to 0.5% of Ti; 0.002 to 0.015% of B; and 0.05% or less of Al, and further comprising: in terms of % by mass with respect to the total mass of the wire, in the flux, 4 to 8% of a Ti oxide in terms of TiO2 in total; 0.1 to 0.6% of a Si oxide in terms of SiO2 in total; 0.02 to 0.3% of an Al oxide in terms of Al2O3 in total; 0.1 to 0.8% of Mg; 0.05 to 0.3% of a fluorine compound in terms of F in total; 0.05 to 0.3% of one kind or two kinds of Na and K in the fluorine compound in terms of Na and K in total; 0.05 to 0.2% of one kind or two kinds of Na2O and K2O in total; and 0.2% or less of a Zr oxide in terms of ZrO2 in total, the balance being Fe in the steel outer skin, iron powder, a Fe component of iron alloy powder, and inevitable impurities.