Method for the preparation of WC-Co Alloys and hard carbon-layer coated on WC-Co Alloys, and their coated tools
US5733668A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1996 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Jan 11, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention discloses a WC--Co alloy in which substantially only the WC particles of a surface layer or components other than metals belonging to the iron group and only the WC particles are exposed, and (a) an average particle diameter of the WC particles of the surface layer is larger than that of the WC particles of the interior, and/or (b) a surface hardness is higher than that of the interior. The WC--Co alloy itself is Used as a stock for a cutting tool or an abrasion and sliding resistant tool, or the alloy is used as a substrate and a hard carbon-layer excellent in adhesive strength is coated on the surface of the matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.