STEEL WIRE FOR ARRCO2 GAS SHIELDED ARC WELDING AND WELDING METHOD

摘要

PURPOSE:To stabilize the transfer condition of arc and globules at the short circuit transfer welding and improve bead shapes by such things as addition of a suitable amount of S in particular into the welding wire, limitation of Ti and Al to slight amounts and limitation of the remaining of Ca on the wire surface to a slight amount. CONSTITUTION:In the finish wire drawing process after plating of the Ar-CO2 shielded arc welding wire composed of the wire composition comprising C; 0.2% or less, Si; 0.51-1.20%, Mn; 0.8-2.5%, S; 0.016-0.060%, Ti; 0.03% or less, Al; 0.02% or less, N; 0.010% or less, Ca; the total amount of the wire composition and surface pickup is 0.0050% or less and the rest substantially Fe, seed oil is used as a lubricant and the seed oil is let to remain at 0.001-0.05wt% on the wire surface. By this wire composition, the weld bead width is made wider, the deviation in the aiming of the weld line may be covered and the weld metal of superior weld shape and high toughness may be obtained.