Tools for percussive and rotary crushing rock drilling provided with a diamond layer
US5335738A · kind A · utility
113Cited by
29References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1991 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | Jun 14, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5735
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to a rock bit button of cemented carbide for percussive or rotary crushing rock drilling. The button is provided with a layer of diamond produced at high pressure and high temperature in the diamond stable area. The cemented carbide has a multi-phase structure having a core that contains eta-phase surrounded by a surface zone of cemented carbide free of eta-phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.