Patent ID: 8124222
Filing Date: 2012-02-28
Classification: C23C,Y10T

Abstract:
1. A coated cutting tool comprising a substrate of cemented carbide, cermets, ceramics, cubic boron-nitride or high speed steel provided with a coating comprising a metallic interlayer placed in-between at least two non-metallic, functional layers or layer systems where: the metallic interlayer comprises at least about 60 at % metal elements chosen from one or more of Ti, Mo, Al, Cr, V, Y, Nb, W, Ta and Zr; where the at least two non-metallic, functional layers or layer systems is one or more of nitrides, oxides, borides, carbides, or combinations thereof; the thickness of the at least two non-metallic functional layer or layer systems being from about 3 to about 200 times the thickness of the metallic interlayer and the number of non-metallic, functional layers or layer systems alternated with metallic interlayers is at least 3, and the total coating thickness is from about 0.5 to about 15 μm.