The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 1992
Filed:
Dec. 13, 1989
Sy-Hwa Chen, Salt Lake City, UT (US);
Chien-Min Sung, Northboro, MA (US);
Norton Company, Worcester, MA (US);
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.