Cemented carbide body with increased wear resistance
US5413869A · kind A · utility
12Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1992 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Nov 13, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5676
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cemented carbide button for rock drilling comprises a core and a surface zone surrounding the core whereby both the surface zone and the core contains WC (alpha-phase) and a binder phase based on at least one of Co, Ni, or Fe and the core in addition contains eta-phase. The eta-phase core extends to the very top (working) surface of the button and as a result is obtained longer life and higher drilling rate particularly for rotating crushing drilling, cutting drilling and percussive drilling in soft rocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.