Patent ID: 6995332

Claim:
A structure of a resistance welded part comprising: a first metallic member comprising iron or an alloy containing iron; a second metallic member comprising copper or an alloy containing copper; the first and second metallic members being joined together by: 1) forming a nickel film on at least one surface of the first and second metallic members; 2) allowing the first metallic member to butt against the second metallic member via the nickel film; and 3) melting a part of each of the first and second metallic members and at least a part of the nickel film by flowing electric currents through the first and second metallic members to generate heat based on contact resistance between the first and second metallic members, thereby joining the first metallic member to the second metallic member so that a first alloy layer containing nickel, copper and iron is formed adjacent the first metallic member at the interface between the first and second metallic members and a second alloy layer containing nickel and cooper is formed adjacent the second metallic member at the interface between the first and second metallic members; wherein the nickel film is formed by plating; and the nickel film is formed with a thickness of about 0.5 μm to about 5.0 μm.