Flux for welding, filler for cored wire and flux cored wire for overlay welding

摘要

the present invention is a flux based on the total weight of a SiO ₂ 45 ~ 75% , Al ₂ O ₃ 5 ~ 35%, and K ₂ O containing from 8 to 25% provides a flux for welding. Is the flux for welding according to the present invention is blended with the alloy powder can be used as a filling material for flux-cored wires. These flux dilution and dilution bias is less variation in the mass ratio between the initial state and the state of the alloy powder after welding so as to minimize strain tolerance of the alloy composition and the organic phase transformation of the weld overlay welding in case of cored wire (tolerance) it is possible to use a very small alloy can improve the reliability of the welding quality. In the case of the overlay welding flux cored wire in this undercut, meandering beads, such as pore generation is suppressed can be maintained to improve the bead shape of the weld, it is possible to prevent the welding defect due to deterioration of the welding surface to crack . ;