Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1981-01-05
1983-05-24
Sheehan, John P.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 05BB, 75 05AC, 75 05BC, 75121, 75251, 423440, C22C 104
Patent
active
043848842
ABSTRACT:
The present invention relates to a process for the production of a solid solution constructed of at least one hard phase having a crystal structure of simple hexagonal type and selected from mixed carbides or carbonitrides of molybdenum and tungsten, which process comprises preparing an alloy powder consisting of a solid solution of molybdenum and tungsten, adding to the alloy powder carbon in an amount necessary for forming (Mo, W).sub.2 C and/or (Mo, W).sub.2 (CN), heating the mixture at a temperature at which (Mo, W).sub.2 C and/or (Mo, W).sub.2 (CN) is stable, adding to the (Mo, W).sub.2 C and/or (Mo, W).sub.2 (CN) carbon in an amount necessary for forming (Mo, W)C and/or (Mo, W)(CN) optionally with an iron group metal and then heating the mixture at a temperature at which (Mo, W)C and/or (Mo, W)(CN) is stable.
REFERENCES:
patent: 3418103 (1968-12-01), Lasdon
patent: 3743499 (1973-07-01), Ramqvist
patent: 4139374 (1979-02-01), Yih et al.
patent: 4216009 (1980-08-01), Miyake et al.
patent: 4257809 (1981-03-01), Burden
Hara Akio
Kodama Mitsuo
Miyake Masaya
Nakano Minol
Sheehan John P.
Sumitomo Electric Industries Ltd.
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