Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1996-07-03
1998-03-03
Mai, Ngoclan
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75242, C22C 2904
Patent
active
057238006
ABSTRACT:
According to the present invention there is provided a wear resistant vane for alternate flow that is appropriate for a rotary compressor that employs HFC flow as an alternate refrigerant, and which vane possesses: a reciprocal or opposed characteristic in that it does not cause to wear a piston to which it contacts and nevertheless causes little wear to itself; a preferable corrosion resistance; and an ensured reliability, in that when employed for an operation that continues for an extended period of time there is no possibility of a surface layer suddenly peeling off. The present invention discloses a vane made of a wear resistant cermet alloy for alternate flow, comprising: 5 to 20% by weight of a binder phase composed mainly of Ni; a hard phase having a double phase structure having a core composed mainly of titanium carbide, titanium nitride and/or titanium carbonitride, and a rim phase encircling the core; and inevitable impurities; the hard phase containing 30 to 60% by weight of Ti, 10 to 30% by weight of W, 0.5 to 10% of Mo, 1 to 25% by weight of at least one of Ta, Nb, Cr, V and Zr, 2 to 5.4% by weight of N and 4 to 12% by weight of C, and being uniformly dispersed in an alloy phase; and further, an average core size of the core being 1.5 .mu.m or less and a maximum core size of the core being 5 .mu.m or less.
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Amano Hirokuni
Hara Yasushi
Koshi Masao
Yoshimoto Takashi
Mai Ngoclan
Nachi-Fujikoshi Corp.
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