Method and apparatus for fabrication of cobalt alloy composite inserts
US6500226B1 · kind B1 · utility
83Cited by
36References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 24, 2000 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Apr 24, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D2099/0028
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
This disclosure features a process of making a two part drill bit insert, namely, a body portion of hard particles such as tungsten carbide particles mixed in an alloy binding the particles. The alloy preferably comprises 6% cobalt with amounts up to about 10% permitted. The body is sintered into a solid member, and also joined to a PDC crown covering the end. The crown is essentially free of cobalt. The process sinters the crown and body while preserving the body and crown cobalt differences.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.