Patent ID: 8651364
Filing Date: 2014-02-18
Classification: B23K,Y10T

Abstract:
1. A method for the production of a strip-shaped or plate-shaped composite metal object of at least two layers of metal, the method comprising the steps of: heat pre-treatment of the layers at a temperature which is at least the same as the re-crystallization temperature of the metal of at least one of the layers, subsequently pressing together the layers, to effect a reduction in thickness thereof, during which the layers in the area of their interfaces undergo a mutual diffusion bonding, using, as the metal of each of the layers aluminum or an aluminum alloy, and providing one of the layers with strip-shaped recesses on a side of the layer facing an adjacent layer, which during pressing together are closed by the adjacent layer and in that the reduction in thickness in relation to the total thickness of the layers present before pressing together is up to 25%, arranging the layers as core layers between two cover layers of another metal such as stainless steel, copper or titanium, and heating the total assembly of these layers during the heat pre-treatment to a temperature which is above the re-crystallization temperature of the core layer metal but below the re-crystallization temperature of the other metal, the step of pressing comprising the steps of: