US 12,392,022 B2
Coated tool for machining of difficult to process materials
Denis Kurapov, Walenstadt (CH)
Assigned to Oerlikon Surface Solutions AG, Pfäffikon, Pfäffikon (CH)
Appl. No. 17/429,712
Filed by Oerlikon Surface Solutions AG, Pfäffikon, Pfäffikon (CH)
PCT Filed Feb. 10, 2020, PCT No. PCT/EP2020/053327
§ 371(c)(1), (2) Date Aug. 10, 2021,
PCT Pub. No. WO2020/165093, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 10 2019 103 363.2 (DE), filed on Feb. 11, 2019.
Prior Publication US 2022/0098721 A1, Mar. 31, 2022
Int. Cl. C23C 14/06 (2006.01); B23C 5/00 (2006.01); C23C 14/02 (2006.01)
CPC C23C 14/0641 (2013.01) [B23C 5/006 (2013.01); C23C 14/024 (2013.01); B23C 2224/14 (2013.01); B23C 2224/24 (2013.01); B23C 2228/08 (2013.01); B23C 2228/10 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A tool for machining workpieces, the tool comprising
a surface which is at least partially covered by a PVD deposited wear-resistant coating,
said wear resistant coating comprising two or more wear-resistant layers, the wear-resistant coating having a modulus of elasticity, E, which is in a range 300 GPa≤E<350 GPa, and further having a hardness, which is greater than 30 GPa, wherein at least one of the two or more wear-resistant layers is an aluminium titanium nitride layer (AlTiN layer) having chemical composition in atomic percentage AlxTi1-xN with x in the range 0.5<x≤0.9, wherein at least two of the two or more wear-resistant layers are made of materials having the same elements and same chemical composition but differing in mechanical properties.