Surface-coated cutting tool with hard coating layer having excellent abrasion resistance
US7597511B2 · kind B2 · utility
15Cited by
5References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 24, 2008 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | Dec 24, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In a surface-coated cutting tool, (a) a Ti compound layer as a lower layer and (b) an α-type Al2O3 layer as an upper layer having a crystal grain structure of an even polygonal shape (including an even hexagonal shape) and an elongate shape and containing Zr are deposited on the surface of a tool substrate. In the surface-coated cutting tool, the above mentioned crystal grains of which insides are divided by at least one crystal lattice interface with the constituent atom covalent lattice point type expressed by Σ3 occupying 60% or more as an area ratio in the crystal grains of the upper layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.