Abstract: The present invention relates to a coated cutting tool including a substrate and a coating. The coating includes a nano-multilayer of alternating layers of a first nanolayer being Ti1-xAlxN, 0.55<x?0.70, and a second nanolayer being Ti1-y-zAlySizN, 0.20?y?0.50, 0.13?z?0.25, 0.46?y+z?0.65. A sequence of one first nanolayer and one second nanolayer forms a layer period, wherein the average layer period thickness in the nano-multilayer is ?20 nm.

Abstract: The present invention relates to a coated cutting tool including a substrate and a coating. The coating has, from about 0.5 to about 10 ?m, a nano-multilayer of alternating nanolayers of a first nanolayer type of Ti1-xAlxN, wherein 0.45?x<0.67, a second nanolayer type of Cr1-yAlyN, wherein 0.60?y?0.80, and a third nanolayer type of Ti1-zSizN, wherein 0.14?z?0.25. An average nanolayer thickness of each of the nanolayer types Ti1-xAlxN, Cr1-yAlyN and Ti1-zSizN in the nano-multilayer is ?1 nm but <3 nm.

Abstract: A coated cutting tool having a substrate and a coating is provided. The coating includes a nano-multilayer of alternating nanolayers of a first nanolayer type being Ti1-xAlxN, 0.35?x<0.67, a second nanolayer type being Ti1-ySiyN, 0.10?y?0.25, and a third nanolayer type being Ti1-zAlzN, 0.70?z?0.90. The nano-multilayer has a thickness from about 0.5 to about 10 ?m. The average nanolayer thickness of each of the nanolayer types Ti1-xAlxN (9), Ti1-ySiyN, and Ti1-zAlzN in the nano-multilayer being from 1 to 30 nm.