BONDING METHOD OF DISSIMILAR MATERIALS MADE FROM METALS AND BONDING STRUCTURE THEREOF
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Abstract
Disclosed is a bonding method for dissimilar materials made from metals and its resulting structures. The materials to be bonded are formed by layering three or more sheets such that a dissimilar material interface and a same material interface are formed. A first current is conducted between a three-sheet layered plate material wherein an aluminum alloy plate, a zinc plated steel plate and a bare steel plate, for example, are layered in order. A nugget is formed in an interface between the zinc plated steel plate and the bare steel plate, which are the same materials. Then, a second current greater than the first current is conducted, and a nugget is formed in an interface between the aluminum alloy plate and the zinc plated steel plate.
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Citations
21 Claims
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1-13. -13. (canceled)
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14. A bonded structure of dissimilar materials made from metals, comprising:
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at least two plate layers of a first metallic material; at least one plate layer of a second metallic material having a melting point lower than the first metallic material; a dissimilar material interface between a plate layer of the first metallic material and a plate layer of the second metallic material; a same material interface between adjacent plate layers of the first metallic material, wherein a contact resistance in the dissimilar material interface is lower than a contact resistance in the same material interface; a nugget formed in the dissimilar material interface having a first diameter Dd; and a nugget formed in the same material interface having a second diameter Ds, wherein the first diameter Dd is equal to or larger than the second diameter Ds. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification