Patent ID: 9399814
Filing Date: 2016-07-26
CPC Classification: B23B,C23C,H01J,Y10T

Claim Text:
1. A coated cutting tool comprising a substrate and a coating, where the coating comprises at least one compound layer comprising Ti 1-x Al x N wherein 0.5<x<0.7 or 0.3<x<0.5, which is deposited by cathodic arc deposition, and which has a thickness of more than 15 μm and up to 30 μm, wherein the coating has compressive stresses of higher than 1.3 GPa and up to 2 GPa as determined by X-ray diffraction analysis using the sin 2 Ψ method, and wherein said compound layer comprises a gradient with respect to said internal stress, with higher compressive stress towards the outer surface of said compound layer.