METHOD FOR MAKING HOLLOW ARTICLES WITH DEFORMED STRUCTURE FROM LOW-DUCTILE ALLOYS Russian patent published in 2004 - IPC

Abstract RU 2239502 C1

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.

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RU 2 239 502 C1

Authors

Levin I.V.

Smirnov V.G.

Kalinin V.S.

Dates

2004-11-10Published

2003-05-23Filed