METHOD FOR MAKING HOLLOW ARTICLES WITH DEFORMED STRUCTURE FROM LOW-DUCTILE ALLOYS

FIELD: manufacture of blanks by casting and further extrusion, possibly manufacture of hollow articles with deformed structure of low-ductile, particularly refractory chrome-nickel super-alloys. ^ SUBSTANCE: method comprises steps of heating front and rear technological washers until normalized temp...

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Bibliographische Detailangaben
Hauptverfasser:	KALININ V.S, LEVIN I.V, SMIRNOV V.G
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS POWDER METALLURGY PUNCHING METAL TRANSPORTING
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Beschreibung
Zusammenfassung:	FIELD: manufacture of blanks by casting and further extrusion, possibly manufacture of hollow articles with deformed structure of low-ductile, particularly refractory chrome-nickel super-alloys. ^ SUBSTANCE: method comprises steps of heating front and rear technological washers until normalized temperature lower than blank heating temperature; successively feeding washers and blank to needle, pressing out tube. Blank is formed by centrifugal casting process at mechanically removing casting skin. Cross section of blank consists 0.85 - 0.93 of surface area of cross section of cavity restricted by mandrel and lateral wall of container. Then blank is subjected to additional pressing out inside container. Invention provides uniform small-grain structure of material in the whole volume of article. ^ EFFECT: enhanced plastic properties of material providing further plastic working of metal, enlarged functional possibilities of universal presses. ^ 1 ex