Wire for welding different types of materials and method of manufacturing the same

A method of manufacturing a wire for welding different types of materials of an Fe-based material and an Al-based material to each other,

• the wire including a conductive core wire made of aluminum or an aluminum alloy and disposed in a tubular metal outer skin made of aluminum or an aluminum alloy,
• the wire including a flux provided between the metal outer skin and the conductive core wire and having at least a function of removing an oxidized film from a surface of a material to be welded, and
• the wire having a flux filling rate of 4.9 mass percent or less with respect to the total mass of the wire, the method comprising:
• forming a coated metal outer skin material including a coating layer by applying a flux paste, which is obtained by kneading a material of the flux and a solvent with each other, to an inner surface of a metal outer skin material having an arcuate cross-sectional shape taken orthogonally to a longitudinal direction thereof;
• forming a wire for drawing by forming a tubular metal outer skin material outside a conductive core wire material for forming the conductive core wire by shaping the coated metal outer skin material with the conductive core wire material disposed inside the coated metal outer skin material;
• and
• performing drawing work until the wire for drawing has a predetermined outside diameter.

A wire for welding different types of materials of a Fe-based material and an Al-based material to each other,

• the wire including a conductive core wire made of aluminum or an aluminum alloy and disposed in a tubular metal outer skin made of aluminum or an aluminum alloy,
• the wire including flux provided between the metal outer skin and the conductive core wire and having at least a function of removing an oxidized film from a surface of a material to be welded, and
• the wire having a flux filling rate of 4.9 mass percent or less with respect to the total mass of the wire, wherein
• the flux between the metal outer skin and the conductive core wire is provided as a dried coating layer.