Patent ID: 6573476
Filing Date: 2003-06-03
Classification: B23K

Abstract:
A flux cored wire for gas-shielded arc welding comprising, with respect to the total weight of the wire, a Ti and a Ti oxide of 3.0 wt % to 8.0 wt % as calculated in terms of TiO2 content, a Si and a Si oxide of 0.5 wt % to 2.0 wt % as calculated in terms of SiO2 content, a metal Mn and an alloy of Mn of 1.5 wt % to 3.5 wt % as calculated in terms of Mn content, a carbon(C) of 0.02 wt % to 0.10 wt %, an Mg and an Mg oxide of 0.5 wt % to 1.5 wt % as calculated in terms of MgO content, a compound of Na2O and K2O of 0.2 wt % and less, a Zr and a Zr oxide of 0.1 wt % to 0.5 wt % as calculated in terms of ZrO2 content, and an Al and an Al oxide of 0.2 wt % to 0.8 wt % as calculated in terms of Al2O3 content, wherein the composition ratio of the components satisfies the following formulas (1) and (2): 0.1&leq;â€ƒ&it;2&it;â€ƒ&it;K2&it;O+Na2&it;OSiO2&leq;0.3Formula  (1)0.6&leq;â€ƒ&it;FeO+MnO+MgOSiO2+Al2&it;O3+0.4&it;â€ƒ&it;TiO2&leq;2.1.Formula  (2)