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Office National dEtudes et de Recherches Aerospatiales ONERA
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Office National dEtudes et de Recherches Aerospatiales ONERA
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Application filed by Office National dEtudes et de Recherches Aerospatiales ONERAfiledCriticalOffice National dEtudes et de Recherches Aerospatiales ONERA
Application grantedgrantedCritical
Publication of FR71540EpublicationCriticalpatent/FR71540E/en
C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
C22B9/14—Refining in the solid state
B—PERFORMING OPERATIONS; TRANSPORTING
B22—CASTING; POWDER METALLURGY
B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
B22F1/14—Treatment of metallic powder
B22F1/142—Thermal or thermo-mechanical treatment
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FR71540D1957-05-141957-05-14
Improvements to processes for the production of materials containing chromium and to materials obtained by these processes
ExpiredFR71540E
(en)
Improvements to processes and devices for the manufacture of tubes with a determined passage profile in concrete or similar material and tubes manufactured by application of these improved processes and devices