Surface-coated cutting tool with excellent adhesion-induced chipping resistance and peel resistance
US11014168B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2017 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Nov 29, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23B2224/32
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In the surface-coated cutting tool, a Ti compound layer containing at least nitrogen and carbon is formed on a surface of cutting tool substrate, a nitrogen concentration in the Ti compound layer, in a case of being measured in a direction perpendicular to the surface of the cutting tool substrate in a vicinity of a cutting edge, gradually increases as a distance from cutting tool substrate increases within a range of 0.20 μm from the surface of the cutting tool substrate toward the Ti compound layer, an average concentration gradient of the nitrogen concentration is 20 at %/μm or more and 300 at %/μm or less, and an average nitrogen concentration in the Ti compound layer in the vicinity of the cutting edge is lower than an average nitrogen concentration in the Ti compound layer at a position of a flank face away from the cutting edge by 3 at % or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.