Metal-based flux cored wire for Ar-CO2 mixed gas shielded arc welding

摘要

A metal-based flux cored wire for Ar-CO 2 mixed gas shielded arc welding used for short arc welding and spray arc welding, resulting in extremely small amount of formation of slag and amount of occurrence of spatter, giving a good bead shape, and giving excellent low temperature toughness of the weld metal, in particular a flux cored wire comprising a steel sheath in which a flux is filled , characterized in that the flux contains a metal powder in 97 mass% or more, and the wire contains , by mass% with respect to the total weight of the wire, C: 0.03 to 0.12%, Si: 0.5 to 1.2%, Mn: 1.5 to 3.5%, S: 0.005 to 0.05%, iron powder with amount of oxygen of 0.25% or less: 4.0 to 15.5%, a total of one or more of alkali metal oxides, alkali metal fluorides, and metal oxides: 0.35% or less, and the balance of mainly Fe ingredient of the steel sheath and Fe ingredients from the flux etc. and unavoidable impurities.