Bonding method of dissimilar materials made from metals and bonding structure thereof
First Claim
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.
1 Assignment
0 Petitions
Accused Products
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.
-
Citations
12 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
Specification