Method of making an extremely fine-grained titanium-based carbon

Details Method of making an extremely fine-grained titanium-based carbon Method of making an extremely fine-grained titanium-based carbon

1991-12-17

1992-08-11

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75236, 75239, 75240, 419 10, 419 13, 419 17, 419 18, 419 23, 419 33, C22C 2904

Patent

active

051375656

ABSTRACT:
According to the present invention there is now provided a method of making a sintered titanium-based carbonitride alloy. According to the method, melt-metallurgical raw materials containing the metallic alloying elements for hard constituent-forming as well as binder phase-forming elements are melted and cast, using no intentional additions of the elements C, N, B and O, to form a pre-alloy which in solidified condition of brittle intermetallic phases with hard constituent-forming and binder phase-forming elements mixed in atomic scale. The pre-alloy is crushed and/or milled to powder with grain size <50 .mu.m. The powder is carbonitrided for simultaneous formation in situ of extremely fine-grained <0.1 .mu.m, hard constituent particles enclosed in their binder phase. The obtained powder is milled together with lubricant and possible additions of powders of metals, carbides and/or nitrides from the groups IV, V or VI in the Periodic Table in order to obtain desired final analysis after which the powder is compacted and sintered.

REFERENCES:
patent: 4783216 (1988-11-01), Kemp et al.
patent: 4894090 (1990-01-01), Ekemar et al.
patent: 4943322 (1990-07-01), Kemp et al.
patent: 5032174 (1991-07-01), Ekemar et al.

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