NITROGEN-MIXED SHIELDING GAS WELDING METHOD AND WIRE FOR WELDING

摘要

PROBLEM TO BE SOLVED: To provide a welding method where, at gas shielding arc welding, the generation of blow holes when an inexpensive a low-cost nitrogen shielding gas harmless for the environment is used can be solved, and to provide a wire for welding.;SOLUTION: In the nitrogen-mixed shielding gas welding method, at the time of nitrogen-mixed shielding gas arc welding for soft steel, 490 MPa class high-tension steel or low alloy steel, using a wire for welding obtained by incorporating, among Cr, Ti, Al and at least one selected from V, Ta and Zr, at least Cr, Ti and Al into wire components, the wire components are allowed to fix nitrogen in the nitrogen-mixed shielding gas as solid solution and nitride. The wire for welding in this case has a constitution comprising, by weight, ≤0.09% C, 0.45 to 1.00% Si, 0.40 to 1.36% Mn, 0.3 to 1.5% Ti, 18.50 to 20.20% Cr and 0.1 to 0.3% Al, and the balance Fe with inevitable impurities.;COPYRIGHT: (C)2006,JPO&NCIPI