Cutting teeth for rolling cutter drill bit
US4372404A · kind A · utility
58Cited by
8References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1980 |
| Grant date | Feb 8, 1983 |
| Priority date | — |
| Expiry date | Sep 10, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2999/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Cutting teeth for rolling cutter bits, including cutter inserts, cutter teeth formed in place, or formed separately and welded in place, etc., are formed by powder metallurgy as a densified powder metallurgical composite of at least two varying phases, said composite having a substantially continuous mechanical property gradient therethrough. One of said phases is preferably a refractory compound and another phase is a binder metal or alloy. The gradient is from one mixture of said phases in one region having hardness or wear resistant properties to another mixture of said phases in another region having toughness properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.