TITANIA BASED FLUX CORED WIRE FOR GAS SHIELDED ARC WELDING

摘要

A titania based flux cored wire for the gas-shielded arc welding is provided to increase the weld workability in the high heat input high efficiency welding by controlling ratio according to the property of a component and an oxide of the wire. A titania based flux cored wire for the gas-shielded arc welding comprises followings. C is contained in an outer cover and a flux of the wire in order to prevent oxide inclusion from penetrating into weld metal inside while maintaining intensity of the weld metal. Mn reduces the amount of oxygen as deoxidant within the weld metal. And the intensity of the weld metal is maintained. BN generates BN in the welding in order to suppress the production of the grain boundary ferrite and increase the intensity and toughness of a welding part by micronizing organization.