Coated cutting tool and method of making a coated cutting tool

The invention relates to a coated cutting tool comprising a substrate 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 60 at % metal elements chosen from one or mo...

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1. Verfasser: Myrtveit, Toril
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The invention relates to a coated cutting tool comprising a substrate 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 60 at % metal elements chosen from one or more of Ti, Mo, Al, Cr, V, Y, Nb, W, Ta and Zr, or mixtures thereof, and wherein the at least two non-metallic, functional layers or layer systems is one or more of nitrides, oxides, borides, carbides, or combinations thereof, and wherein the thickness of the at least two non-metallic functional layer or layer systems is from about 3 to about 200 times the thickness of the metallic interlayer. The number of non-metallic, functional layers or layer systems alternated with metallic interlayers is at least 3.The invention also relates to a method of making a cutting tool according to the invention.Cutting tools according to the invention have an increased tool life.