| 摘要 |
PURPOSE:To improve welding workability by incorporating respectively specific weight % of C, Mn, Si, and F as well as total of Zn, Al, Cu, etc. into a wire and filling a flux at a prescribed filling factor therein. CONSTITUTION:<=0.10% C, 0.1-1.2% Si, 0.4-2.5% Mn,<=0.04% both P and S, and 0.01-6.5% F, by the total weight of the wire, are incorporated into the wire and further the total content of Zn, Al, and Cu is specified to 0.2-2.0%. The flux filling factor at the time of forming the flux cored wire having such compsn. component is specified to a 8.0-50.0% range and if necessary, Sb, Te, Tl, Pb, Bi, etc. are added at<=0.20% in total thereto and Na2O and K2O are added at 0.1-2.0% in total thereto. The generation of defects in the stage of welding galvanized steel sheets is prevented and the workability of welding is improved.
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