Surface-coated cutting tool with coated film having strength distribution of compressive stress
US7799415B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 1, 2005 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Apr 22, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A surface-coated cutting tool according to the present invention includes a base material and a coated film formed on the base material. The coated film serves as an outermost layer on the base material and has compressive stress. The compressive stress is varied so as to have strength distribution in a direction of thickness of the coated film. The strength distribution is characterized in that the compressive stress at a surface of the coated film continuously decreases from the surface of the coated film toward a first intermediate point located between the surface of the coated film and a bottom surface of the coated film and the compressive stress attains a relative minimum point at the first intermediate point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.