Patent ID: 6935008
Filing Date: 2005-08-30
Classification: B21C,B21F,B60C,C23C,C25D,D07B,Y10T

Abstract:
1. A method for making a metallic cord made up of one or more metallic wires, comprising making at least two layers of at least two metallic elements including copper and zinc on the surface of a base wire, heating the layers to cause the metallic elements thermodiffusion to transform into a primary alloy layer, making a layer of copper on the primary alloy layer, drawing the wire provided with the primary alloy layer and outer copper layer into a metallic wire through dies so that the outer copper layer is diminished during passing through the dies, and a secondary alloy layer is formed as a result of transformation of the primary alloy layer and the outer copper layer which is caused by frictional heat during passing through the dies.