Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1976-11-23
1978-08-01
Schafer, Richard E.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75214, 75224, 425 79, B22F 312, B22F 900
Patent
active
041040600
ABSTRACT:
This application discloses method and apparatus for solid-phase conversion of particulate metal (or swarf) into continuous metal-jacketed strip by feeding particulate metal, together with any desired reducing or alloying additives, between travelling metal jacket sheet components, the lower channel-shaped and the upper flat strip closely fitting between the channel sides; injecting air-purging reducing or inert gas to create an inside environment of protective gas rather higher than atmospheric air pressure, the gas entering the material and the embrassing jacket sheet components which after filling and closing form a permanent circumferentially and longitudinally complete jacket around the material; compacting the material in the jacket sheet components after closing by repeated compacting actions; feeding this strip forward between successive compacting actions while clear of the compacting die elements; sealing the jacket components closed together over the compacted material to form a circumferentially complete jacket; subjecting the compacted jacketed strip to a heating treatment to bring the particles and jacket to sintering and fusion-bonding temperature; returning hot gases (counterflow) to the particulate material being red in; hot-compacting the heated jacketed strip to reduce its thickness, coalesce and densify the material; and (when desired) cold-compacting the strip to improve physical properties; coil, or cut into finite lengths.
REFERENCES:
patent: 3158474 (1964-11-01), Andersen et al.
patent: 3184840 (1965-05-01), Byrne et al.
patent: 3512964 (1970-05-01), Fuchsman
patent: 3664009 (1972-05-01), Huller et al.
patent: 3708284 (1973-01-01), Chao
Glisson William R.
Schafer Richard E.
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