Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1976-10-06
1978-08-22
Hunt, Brooks H.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75205, 75211, 75225, B22F 300, B22F 100
Patent
active
041086490
ABSTRACT:
A hard sintered carbide composition and the method of making such composition for use as a cutting material or for use as wear parts or dies and the like, is disclosed. The composition consists essentially of a titanium carbide phase bound together by a binding alloy principally composed of molybdenum and nickel; the titanium carbide contains controlled amounts of dissolved vanadium carbide and/or titanium nitride. The binding alloy is characterized by the addition of aluminum in controlled amounts and chromium may be added to the binding alloy as a partial substitute for some of the aluminum. The presence of the dissolved vanadium carbide and/or titanium nitride produces a grain refinement in the carbide phase and the presence of the aluminum tends to form a nickel aluminide in the binding alloy which is of a finely divided character. The presence of two or more of the elements; vanadium carbide, titanium nitride and aluminum produce an unprecedented improvement in the deformation resistance of a TiC--Ni--Mo composition.
The method requires that the binding alloy powder and the carbide powders be selected as to size (about 3-4 microns) be milled with the additive powders and the compacted charge then be sintered at about 1400.degree. C in closed graphite trays in a furnace evacuated to less than 1 micron of mercury pressure.
REFERENCES:
patent: 3492101 (1970-01-01), Prill et al.
patent: 3679442 (1972-07-01), Bergna
patent: 3741733 (1973-06-01), Kieffer
patent: 3981062 (1976-09-01), Moskowitz et al.
Ford Motor Company
Hunt Brooks H.
Johnson Olin B.
Malleck Joseph W.
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