METHOD FOR PRODUCTION OF WORKPIECES (SEMI-FINISHED PRODUCTS) FROM FAST-CRYSTALLISED ALUMINIUM ALLOYS Russian patent published in 2016 - IPC B22F3/14 C22C1/04 C22C21/00 B22F9/10 

FIELD: metallurgy.

SUBSTANCE: invention relates to powder metallurgy using fast crystallisation, in particular to production of workpieces from aluminium alloys. Disclosed method involves preparation of aluminium melt, centrifugal casting of granules, their cooling and further stepped vacuum degassing in sealed process capsules, then performing compaction of granules in sealed process capsules without additional heating in a press container, heated to temperature not less than 400 °C, and machining compacted briquettes to produce compact workpieces. Centrifugal casting of granules and cooling of obtained granules is carried out in liquid nitrogen medium at constant temperature of minus 196 °C, wherein cooling rate during crystallisation of granules varies from 1.05 × 10,000 to 100,000 K per second.

EFFECT: reduced content of hydrogen and oxygen in metal workpieces, improved mechanical properties of workpieces, reduced cost of production.

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