METHOD OF MANUFACTURING ARTICLES FROM REFRACTORY MONOCRYSTALLINE METALS AND THEIR ALLOYS

metallurgy, particularly, manufacture of articles from monocrystalline metals and their alloys; applicable in power engineering, radio engineering and radioelectronics. SUBSTANCE: method includes placement of polycrystalline article into neutral atmosphere between current leads, heating of article b...

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Bibliographische Detailangaben
Hauptverfasser:	GONTAR' A.S, GRIDNEV A.A, NIKOLAEV JU.V
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY CRYSTAL GROWTH FERROUS OR NON-FERROUS ALLOYS METALLURGY PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH TREATMENT OF ALLOYS OR NON-FERROUS METALS UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL
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Beschreibung
Zusammenfassung:	metallurgy, particularly, manufacture of articles from monocrystalline metals and their alloys; applicable in power engineering, radio engineering and radioelectronics. SUBSTANCE: method includes placement of polycrystalline article into neutral atmosphere between current leads, heating of article by passing of pulse unipolar current up to completion of recrystallization process over article length. In so doing, one of current leads is connected to article end through spring-loaded discharger electrode ensuring temperature gradient in contact zone of at least 100 C/cm with current density of 103 - 5.104 A/sq.cm, process conduction at temperature of 0.3-0.7 of melting temperature of article material. EFFECT: simplified technology of article manufacture and reduced cost of articles. 1 ex