Hard metal body and method of making same
US4343865A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1981 |
| Grant date | Aug 10, 1982 |
| Priority date | — |
| Expiry date | Jun 24, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12576
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A multi-layered wear resistant article and a method for forming the same is disclosed which is adapted for use with cutting tools. More particularly, the article includes a substrate formed from a cemented sintered metal carbide material such as a tungsten carbide and cobalt composition. A bonding layer formed of elemental boron is provided to increase the adhesion between the substrate and an outer coating of a wear resistant material such as titanium boride. A thin intermediate layer of titanium carbide, titanium nitride, titanium carbonitride, hafnium carbide, hafnium nitride, hafnium carbonitride, zirconium carbide, zirconium nitride, zirconium carbonitride, or a mixture of any of the foregoing may be interposed between the boron adhesive layer and the substrate to prevent diffusion of boron from the bonding layer into the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.