Coated tool
US8882870B2 · kind B2 · utility
0Cited by
7References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 4, 2011 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Jan 14, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A coated tool has a substrate and a coating film coated on the surface thereof. The coating film includes an intermediate film coated on the surface of the substrate, and an oxide film coated on the surface of the intermediate film. A crack coefficient R obtained by measuring a crack length dc (μm) which is generated on the surface of the coated tool by pushing a Vickers indenter into the surface of the coating film with an applied load P=196(N), and a fracture toughness KIC (MPa·m0.5) of the substrate, and by calculating from the following numerical formula:R=P/(dc·KIC),is 0.07 to 0.12 m0.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.