| 摘要 |
PROBLEM TO BE SOLVED: To provide a flux-cored wire for gas shield arc welding used for fillet welding, that good plasma resistance, bead shape, outward appearance and detachability of slag are obtd. even in the case of using the high speed horizontal fillet welding under high current welding condition, and a flux-cored wire for whole position welding, that the weldability in various weldings, is good including the metal dripping resistance in the vertical welding even in the case of using in the wide welding range containing the high current zone. SOLUTION: Relating to the flux-cored wire for gas shield arc welding constituted by filling the flux in a steel-made outer shell, an iron base Si-Mn alloy powder as the flux, consisting of, by weight, 0.40-1.20% C, 5-12% Si, 19-42% Mn and the balance Fe so as to satisfy Si >=11.89-2.92 C-0.077 Mn and having <=212μm grain size is contained in amount of >=1.0% based on the whole wt. of the wire, and further, 2.0-7.0% TiO2, 0.2-1.5% SiO2, 0.1-1.2% ZrO2 and 0.01-0.3% fluoride (converted into F) are contained.
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