High hardness/high compressive stress multilayer coated tool
US5075181A · kind A · utility
45Cited by
12References
18Claims
0Family size
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Inventors
Key dates
| Filing date | May 5, 1989 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | May 5, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/263
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A cutting tool is provided composed of a hard substrate having a PVD coating thereon having three layers. The innermost or first layer is composed of a group IVB (titanium, hafnium or zirconium) metal nitride. The middle or second layer is composed of a group IVB carbonitride. The outermost or third layer is also composed of a group IVB metal nitride. The PVD coating is characterized by high hardness and high residual compressive stresses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.