Patent ID: 8748778

Claim:
A stainless steel flux-cored welding wire for welding of a zinc-coated steel sheet, the welding wire comprised of a stainless steel sheath in which flux is filled, characterized in that total amount of elements which are included as metals or alloy compositions in said sheath and flux are, by mass % with respect to a total mass of the welding wire, C: 0.01 to 0.05%, Si: 0.1 to 1.5%, Mn: 0.5 to 3.0%, Ni: 7.0 to 10.0%, and Cr: 26.0 to 30.0%, and a F value which is defined by the following formula (1) is 30 to 50; further, said flux comprises, as slag forming agents, by mass % with respect to the total mass of the wire, TiO 2 : 3.8 to 6.8%, SiO 2 : 1.8 to 3.2%, ZrO 2 : 1.3% or less (including 0%), and Al 2 O 3 : 0.5% or less (including 0%), and a total amount of said slag forming agents and other slag forming agents is 7.5 to 10.5%; furthermore, said TiO 2 satisfies, by mass % with respect to the total amount of slag forming agents, TiO 2 : 50 to 65%; a balance of said sheath and flux is Fe and unavoidable impurities; F ⁢ ⁢ value = 3 × [ Cr ⁢ ⁢ % ] + 4.5 × [ Si ⁢ ⁢ % ] - 2.8 × [ Ni ⁢ ⁢ % ] - 84 × [ C ⁢ ⁢ % ] - 1.4 × [ Mn ⁢ ⁢ % ] - 19.8 ( 1 ) wherein [Cr %], [Si %], [Ni %], [C %], and [Mn %] respectively indicate totals of Cr, Si, Ni, C, and Mn contained in the sheath and wire in the welding wire with respect to the total mass of the wire.