Coated hard alloy tool
US5776588A · kind A · utility
39Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Aug 1, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24926
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An improved coated hard alloy tool having a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of the substrate, the coating film including at least one oxide layer. The top several layers of the coating film are missing partially or completely in an area where the tool is brought into frictional contact with a workpiece. At least one oxide layer (such as Al.sub.2 O.sub.3 layer) is included in the missing layers. This increases wear resistance of the coated hard alloy tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.