Patent ID: 8507825
Filing Date: 2013-08-13
Classification: B23K,Y10T

Abstract:
1. A bonded structure of dissimilar materials made from metals, comprising: at least two plate layers of a steel material; a plate layer of a second metallic material having a melting point lower than the steel material; a dissimilar material interface between a plate layer of the steel material and the plate layer of the second metallic material; a steel material interface between adjacent plate layers of the steel material, wherein a contact resistance in the dissimilar material interface is lower than a contact resistance in the steel material interface; a first nugget formed in the dissimilar material interface to bond the plate layer of the steel material and the plate layer of the second metallic material, the first nugget having a first diameter Dd; and a second nugget formed in the steel material interface to bond the adjacent plate layers of the steel material, the second nugget having a second diameter Ds, wherein the first diameter Dd is larger than the second diameter Ds.