Surface-coated cutting tool
US8012611B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2005 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Jan 21, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to a surface-coated cutting tool comprising a substrate and a coating formed on the substrate, the coating includes a first coating of TiCN and a second coating of α-type Al2O3, the first coating is located between the substrate and the aforementioned second coating, and the second coating has compressive stress S1 in an area A1 spreading from an insert ridge portion in the direction of a rake face and the direction of a flank face with distances of at least 0.5 mm respectively and has tensile stress S2 in an area A2 other than this area A1, while compressive stress S1 and tensile stress S2 are defined by the following expression (I):400 MPa≦|S1−S2|≦3500 Mpa (I).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.