Cubic boron nitride and metal carbide tool bit

Details Cubic boron nitride and metal carbide tool bit Cubic boron nitride and metal carbide tool bit

1979-12-17

1982-08-03

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75240, 75244, B22F 314

Patent

active

043425950

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.

REFERENCES:
patent: 3743489 (1973-07-01), Wentorf et al.
patent: 3767371 (1973-10-01), Wentorf et al.
patent: 3852078 (1974-12-01), Wakatsuki et al.
patent: 3868234 (1975-02-01), Fontunella
patent: 3918931 (1975-11-01), De Vries et al.
patent: 3944398 (1976-03-01), Bell
patent: 3982911 (1976-09-01), Lee
"Manufacture of Superhard Tungsten Carbide", Kuratomi, Chemical Abstracts, vol. 78, 1973, 163134w.
"Boron Nitride-Based Cutting Tools", Fujikoshi, Chemical Abstracts, vol. 94, 1981, 126080k.

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