Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1988-07-22
1990-09-18
Lechert, Jr., Stephen J.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75240, 75241, 75244, 419 13, 419 16, 419 17, C22C 2904
Patent
active
049575481
ABSTRACT:
This invention provides a cermet alloy improved in toughness high-temperature strength and chipping resistance. This cermet alloy consists essentially of 50-95% by weight of a hard phase of a composite carbo-nitride of at least both of W and Ti and, optionally, one or more elements selected from the group consisting of Groups 4a, 5a and 6a elements of the periodic table, the balance being a binding phase, of an Fe family element or elements and inevitable impurities, said composite carbo-nitride has a rim-and-core structure which comprises a core portion of a composite carbo-nitride poor in Ti and nitrogen, surrounded thereon by a rim portion of a composite carbo-nitride rich in Ti and nitrogen. It is preferred that the hard phase consists of 50% by volume or less of TiN or TiCN particles having N.gtoreq.C and forming no rim-and-core structure and the composite carbo-nitride having the rim-and-core structure.
REFERENCES:
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patent: 4857108 (1989-08-01), Brandt et al.
Patent Abstracts of Japan, vol. 8, No. 184, (C-239) [1621], 23rd, Aug., 1984, & JP-A-5,976,848 (Mitsubishi Kinzoku K. K.) 02-05-1984.
Ida Hisaaki
Iyori Yusuke
Shima Nobuhiko
Bhat Nina
Hitachi Metals Ltd.
Lechert Jr. Stephen J.
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