COATED CUTTING TOOL AND METHOD FOR MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To provide a coated cutting tool having a PVD-coating that is not prone to cause spalling, frittering, so-called edge-line spalling and flaking, not even on an edge having sharp geometries and polished state, and a method for manufacturing the same. SOLUTION: The coated cutting tool includes a substrate provided with a coating including a metallic interlayer disposed in-between at least two non-metallic functional layers or layer systems. The metallic interlayer includes at least 60 at% of metal elements chosen from one or more of Ti, Mo, Al, Cr, V, Y, Nb, W, Ta and Zr, or mixtures thereof, and at least two non-metallic functional layers or layer systems comprise one or more of nitrides, oxides, borides, carbides, or combinations thereof. The thickness of at least two non-metallic functional layers or layer systems is from about 3 to about 200 times of the thickness of the metallic layer. The number of the non-metallic functional layers or layer systems alternated with the metallic interlayer is at least three. COPYRIGHT: (C)2009,JPO&INPIT