Diamond metal composite cutter and method for making same
US5096465A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1989 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | Dec 13, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2026/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A superhard material-metal composite product comprises a plurality of metal coated superhard particles (diamond or cubic boron nitride), and a binder alloy forming a cementing matrix which binds the coated superhard particles into a coherent mass. The binder alloy has a melting point below about 1300.degree. C. and is capable of wetting the metal coating on the superhard particles. The superhard material-metal composite product is formed by assembling the coated particles and the binder alloy in a graphite mold, and then hot pressing at temperatures and pressures well below the temperatures and pressures of the diamond forming region. The superhard component comprises about 40% to 75% by volume of the composite product. The superhard material-metal composite product is of intermediate quality and is particularly useful in earth boring bits for drilling soft rock formations having abrasive rock stringers therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.