Diamond/sintered carbide cutting tool

Details Diamond/sintered carbide cutting tool Diamond/sintered carbide cutting tool

1978-05-04

1979-10-23

Schafer, Richard E.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

51307, 75241, 75242, B24D 304, C22C 2900

Patent

active

041719735

ABSTRACT:
A sintered compact for use in a cutting tool and a method of producing the same are disclosed. The compact comprises 95 to 20 volume % of diamond finer than one micron in size and the balance binder also finer than one micron selected from the group of WC, (MoW)C, WC base cemented carbide and (MoW)C base cemented carbide.
The method comprises pulverizing a diamond powder by using cemented carbide balls and a pot having a cemented carbide lining, mixing the diamond powder with a powder abraded from the balls and pot to produce a powder mix finer than one micron containing 95 to 20 volume % of diamond, heat-treating the powder mix in vacuum so as to degas, and hot-pressing the powder mix under high pressure at high temperature within the stable range of diamond.

REFERENCES:
patent: 1904049 (1933-04-01), Hoyt
patent: 3136615 (1964-06-01), Bovenkerk et al.
patent: 3372010 (1968-03-01), Parsons
patent: 3399254 (1968-08-01), Dunnington
patent: 3663475 (1972-05-01), Figiel
patent: 3767371 (1973-10-01), Wentorf et al.
patent: 3785093 (1975-01-01), Vereschagin et al.
patent: 3944398 (1976-03-01), Bell
patent: 4084942 (1978-04-01), Villalobos

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