FLUX-CORED WIRE FOR WELDING DIFFERENT MATERIALS, METHOD FOR LASER WELDING OF DIFFERENT MATERIALS, AND METHOD FOR MIG WELDING OF DIFFERENT MATERIALS

摘要

PROBLEM TO BE SOLVED: To provide a flux-cored wire for welding different materials, a method for laser welding of different materials and a method for MIG welding of different materials, which can improve tensile shear strength of a welded joint portion and peeling strength of a welded portion interface in welding aluminum or an aluminum alloy material and a steel material.

SOLUTION: The flux-cored wire has a cylindrical sheath comprising an aluminum alloy which contains Si in an amount of 1.5 to 2.5% by mass and Zr in an amount of 0.05 to 0.25% by mass, with the remainder being aluminum and inevitable impurities, and a flux filling inside the sheath and containing cesium fluoride in an amount of 20 to 60% by mass. The packing fraction of the flux is 5 to 20% by mass of the total mass of the wire.

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