Cutting elements with increased toughness and thermal fatigue resistance for drilling applications
US7832506B2 · kind B2 · utility
8Cited by
6References
37Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 31, 2008 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Nov 27, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2005/001
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Cutting elements offering increased toughness and thermal fatigue resistance can be formed of a wear resistant material having coarse grains disposed in a binder matrix with a binder content of at least about 18% by weight. The coarse grains include grains of at least one selected from the group of a transition metal carbide, a transition metal boride, and transition metal nitride. The binder content and coarse grain size may be selected to provide a Rockwell A hardness of at least about 75 Ra or a wear number of at least about 1.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.