STAINLESS STEEL FLUX-CORED WELDING WIRE FOR WELDING OF ZINC-COATED STEEL SHEET AND ARC WELDING METHOD OF ZINC-COATED STEEL SHEET USING SAME

摘要

A stainless steel flux-cored welding wire for zinc-coatedsteel sheet welding use which gives a weld zonewhere no zinc embrittlement cracking occurs and thecorrosion resistance and ductility are excellent andwhich is good in weld work efficiency and a weldingmethod using the same, the welding wire characterized inthat total amounts of elements which are included asmetals or alloy compositions in the sheath and flux are,by mass% with respect to a total mass of the weldingwire, 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%, an F value is 30to 50 in range, further, the wire contains, as slagforming agents, in the flux, by mass% with respect to thetotal mass of the wire, TiO2: 3.8 to 6.8%, SiO2: 1.8 to3.2%, ZrO2: 1.3% or less, and Al2O3: 0.5% or less, a totalamount of the slag forming agent and other slag formingagents is 7.5 to 10.5%, furthermore, the TiO2 satisfies,by mass% with respect to the total amount of slag formingagents, TiO2: 50 to 65%, and a balance of the sheath andflux is Fe and unavoidable impurities.