	US 12,276,016 B2
	Coated cutting tool
Veit Schier, Tubingen (DE); and Wolfgang Engelhart, Tubingen (DE)
Assigned to WALTER AG, Tubingen (DE)
Appl. No. 17/786,115
Filed by WALTER AG, Tubingen (DE)
PCT Filed Dec. 17, 2020, PCT No. PCT/EP2020/086640 § 371(c)(1), (2) Date Jun. 16, 2022, PCT Pub. No. WO2021/122892, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 19218808 (EP), filed on Dec. 20, 2019.
Prior Publication US 2023/0028083 A1, Jan. 26, 2023
Int. Cl. C23C 30/00 (2006.01); C23C 14/00 (2006.01); C23C 14/06 (2006.01); C23C 14/34 (2006.01); C23C 14/35 (2006.01)

CPC C23C 14/0641 (2013.01) [C23C 14/0036 (2013.01); C23C 14/3485 (2013.01); C23C 14/352 (2013.01); C23C 30/005 (2013.01)]

17 Claims

1. A coated cutting tool comprising a substrate with a coating including a (Ti,Al)N layer having an overall composition (Ti_xAl_1-x)N, 0.34≤x≤0.65, wherein the (Ti,Al)N layer contains columnar (Ti,Al)N grains with an average grain size of from 10 to 100 nm, the (Ti,Al)N layer having lattice planes of a cubic crystal structure, wherein the (Ti,Al)N layer shows a pattern in electron diffraction analysis wherein there is a diffraction signal existing, which is shown as a peak in an averaged radial intensity distribution profile having its maximum within a scattering vector range of from 3.2 to 4.0 nm⁻¹, and a full width half maximum of the peak being from 0.8 to 2.0 nm⁻¹, wherein the (Ti,Al)N layer is a (Ti,Al)N nano-multilayer made of from 2 to 4 different (Ti,Al)N sub-layers having different Ti:Al ratios from each other, an average thickness of the 2 to 4 different (Ti,Al)N sub-layers being from 1 to 20 nm.