Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1989-04-07
1990-05-08
Lechert, Jr., Stephen J.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75237, 75240, 419 15, 419 16, 419 18, 419 23, 419 28, 419 29, 419 37, 419 45, 419 54, 419 57, 419 60, C22C 2902
Patent
active
049235125
ABSTRACT:
Cobalt-bound tungsten carbide metal matrix composites having a unique microstructure are produced by consolidating partially sintered greenware under high pressures, e.g., 120,000 psi, at temperatures less than those used for conventional liquid phase sintering in a relatively short time, e.g., from less than one minute to less than about one hour. The composites have a binder phase which contains less than about 80 weight percent of the tungsten found in a composite prepared from the same or similar compositions via liquid phase sintering. These composites provide cutting tools with both toughness and wear resistance which exceed that of cutting tools made from the same or similar compositions via liquid phase sintering.
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Schwarz Douglas B.
Timm Ed E.
Howard D. R.
Lechert Jr. Stephen J.
The Dow Chemical Company
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