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Bonding method of dissimilar materials made from metals and bonding structure thereof

  • US 8,058,584 B2
  • Filed: 03/17/2008
  • Issued: 11/15/2011
  • Est. Priority Date: 03/30/2007
  • Status: Active Grant
First Claim
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1. A method of bonding dissimilar materials made from metals, the method comprising:

  • layering a plurality of plate materials, wherein at least two of the plurality of plate materials are a first metallic material and at least one of the plurality of plate materials is a second metallic material having a melting point lower than the first metallic material, to form a dissimilar material interface and a same material interface;

    forming a layered seam by a resistance welding operation in which a contact resistance of the dissimilar material interface is lower than a contact resistance of the same material interface, wherein the resistance welding operation comprises;

    conducting a first current across at least three layers of the plurality of plate materials after layering to form a nugget in the same material interface; and

    conducting a second current greater than the first current across the at least three layers of the plurality of plate materials to form a nugget in the dissimilar material interface.

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