Cemented carbide body with extra tough behavior
US5279901A · kind A · utility
15Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1992 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Feb 5, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to cemented carbide bodies preferably for rock drilling and mineral cutting. Due to the fact that the bodies are built up of a core of eta-phase-containing cemented carbide surrounded by a surface zone free of eta-phase with low Co-content in the surface zone and successively increasing Co-content to a maximum in the outer part of the eta-phase-core they have obtained an increase in toughness and life at practical use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.