Tools for cutting rock drilling
US5217081A · kind A · utility
141Cited by
29References
11Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 14, 1991 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Jun 14, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C29/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a rock bit insert of cemented carbide for cutting rock drilling. The insert is provided with one or more bodies or layers of diamond or cBN produced at high pressure and high temperature in the diamond or cBN stable area. The body of cemented carbide has a multi-structure containing eta-phase surrounded by a surface zone of cemented carbide free of eta-phase and having a low content of cobalt in the surface and a higher content of cobalt next to the eta-phase zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.