Flux cored wire and its production manner null for gas shield arc welding

摘要

PROBLEM TO BE SOLVED: To obtain a flux cored wire for gas shield arc welding which has good productivity, and excellent welding metal performance and welding workability when a finish wire is welded, without occurrence of incomplete fusion or spatter when the flux cored wire is manufactured.;SOLUTION: A steel enclosure is filled with a flux to form a flux cored wire for gas shield arc welding. In this case, the flux mainly composed of TiO2 contains 0.5-20 wt.% nickel oxide powder. Or, in this manufacturing method of a flux cored wire for gas shield arc welding, flux is supplied while a belt steel is molded into a tubular element, and both edges of the tubular element is welded, so as to reduce the diameter of a welded pipe, which is filled with a flux. This flux, which is mainly composed of TiO2 and contains 0.5-20 wt.% nickel oxide, is supplied in a tubular element. Also, relative permeability (μ) of the flux to be supplied in a tubular element, is 1.10 or less.;COPYRIGHT: (C)2000,JPO