Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1993-06-22
1995-11-28
Mai, Ngoclan
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75242, 419 16, 419 33, 419 38, C22C 2904, B22F 300
Patent
active
054703727
ABSTRACT:
There is now provided a sintered titanium-based carbonitride alloy for metal cutting containing hard constituents based on Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W and 3-30% binder phase based on Co and/or Ni. The structure contains well-dispersed and/or as agglomerates, 10-50% by volume hard constituent grains essentially without core-rim structure with a mean grain size of 0.8-5 .mu.m in a more fine-grained matrix with a mean grain size of the hard constituents of <1 .mu.m. The matrix is made from a powder being prepared from an intermetallic pre-alloy disintegrated to <50 .mu.m particle size and then carbonitrided in situ to extremely fine-grained hard constituents having a diameter .ltoreq.0.1 .mu.m within the binder phase metals.
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Mai Ngoclan
Sandvik AB
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