METHOD FOR MODIFICATION OF ALUMINIUM ALLOYS Russian patent published in 1994 - IPC

FIELD: metallurgy. SUBSTANCE: modifying mixture is added into melted charge, its quantity being 0.02-0.20 mass % of charge mass. Said mixture contains carbide- and nitride- forming elements and oxides of aluminium and copper at ratio 30-70:0.1-0.5 together with alkali and alkali-earth elements and with their compounds; ratio of aluminium and copper oxides being 100: 0.01-0.98. EFFECT: improves airtightness of casting, increases its strength and plasticity. 3 cl, 2 tbl