Cutting tool with a TiAlN coating having rake and relief surfaces with different residual stresses
US12109628B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2022 |
| Grant date | Oct 8, 2024 |
| Priority date | — |
| Expiry date | Aug 10, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23B2228/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A metal cutting insert has a substrate body of cemented carbide, cermet, or ceramic and at least one cutting edge defined between a rake face and a relief face. The cutting insert has a CVD coating including a layer of aluminum titanium nitride having a cubic face centered lattice structure, represented by a formula (AlxTi1-xMy)CzN1-z wherein a stoichiometry coefficient of aluminum is 0.30<x<0.95, wherein M is at least one element selected from the group consisting of Cl and Ar, with a stoichiometry coefficient of which is 0≤y<0.01, and wherein a stoichiometry coefficient of carbon is 0≤z<0.3. The (AlxTi1-xMy)CzN1-z layer satisfies a relationship 10<|S1-S2|<500 MPa wherein S1 is the residual stress measured on the rake face, and S2 is the residual stress measured on the relief face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.