Patent ID: 8206812
Filing Date: 2012-06-26
Classification: B22F,C23C,Y10T

Abstract:
1. A coated cutting tool for metal machining comprising a body of cemented carbide or cermet onto which is applied a PVD coating wherein said coating has a thickness of from about 2.0 to about 20 μm, and comprises: a first (Me a second (Me in between the first layer, c, and the second layer, d, an (Me where the thickness of the layer, e, between the first layer, c, and the second layers, d, is less than about 0.5 times the thickness of thinnest of the first layer, c, and the second layer, d, where the layer, e, between the first layer, c, and the second layer, d, has a composition differing from the first layer, c, and the second layer, d, and wherein the first layer, c, is in direct contact with the layer, e, and the layer, e, is in direct contact with the second layer, d.