Method of producing nitrogen-strengthened alloys

Details Method of producing nitrogen-strengthened alloys Method of producing nitrogen-strengthened alloys

1989-09-20

1991-03-12

Yee, Deborah

Specialized metallurgical processes, compositions for use therei

Processes

Producing solid particulate free metal directly from liquid...

75363, 1481261, C22C 105

Patent

active

049990527

ABSTRACT:
Nitrogen-strengthened alloys, especially steels, are produced by heating a combination of metal particles and a nitrogen donor, such as a chromium nitride, to make nitrogen available as a solute in the particles. The particles may be produced as a permeable preform for the process. The dissolved nitrogen leads to improved hardness, and higher strength is additionally obtained by the inclusion of a dispersant, such as yttria, in the particles.

REFERENCES:
patent: Re31767 (1984-12-01), Brooks
patent: 4582679 (1986-04-01), Wilson et al.
patent: 4708742 (1987-11-01), Wilson
Patent Abracts of Japan, vol. 12, No. 28 (C-471), 27th Jan. 1988, Japan, Patent Application No. 62177157 (Mitsubishi).

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