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:
Aug. 03, 1982
Filed:
Dec. 17, 1979
Romeo G Bourdeau, Tequesta, FL (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
Disclosed is an improved tool bit having 7 to 36 mole percent cubic boron nitride together with a metal carbide in a matrix containing a transition metal and a reactive metal sintering aid. A preferred tool bit consists by atomic percent of 52-79 tungsten carbide, 7-36 cubic boron nitride, 9-14 cobalt, and 0.2-2.5 zirconium. The new bits provide up to four times more life than tungsten carbide cobalt bits in machining nickel superalloys and are less costly than wholly cubic boron nitride bits. Tool bits containing tungsten carbide and cubic boron nitride particulates are fabricable at relatively moderate hot pressing pressures and temperatures (7-28 MPa, 1350.degree.-1500.degree. C.) if included therein is a sintering aid selected from the group consisting of titanium, zirconium, hafnium, aluminum or mixtures thereof. The aforementioned reactive metal aids are preferably added as hydrides.