METHOD OF PREPARING MAGNESIUM-CONTAINING ALUMINUM-BASED STRUCTURAL MATERIAL Russian patent published in 2007 - IPC C22F1/47 C22C21/06 

FIELD: foundry and rolling processes.

SUBSTANCE: structural material contains following components, wt %: magnesium 9.0-11.0, zirconium 0.15-0.2, cobalt 0.01-0.001, beryllium 0.001-0.02, boron 0.005-0.007, aluminum - the balance. Crystallization of melt is carried out in rotary crystallizer at gravitation coefficient 220-250 and melt lifetime 12-15 sec/kg. Ingot is first heated for 2-4 h at 340-380° C and then subjected to hot rolling at that temperature until thickness 4-8 mm is attained at deformation rate up to 30% in each cycle and final rolling temperature 310-330° C. Thereafter, cold rolling is effected with deformation rate up to 50% in each cycle and intermediate annealings for 0.5-2.0 h at 310-390° C until required thickness 0.5-2.0 mm is attained followed by final annealing of rolled metal for 5-40 min at 400-450° C.

EFFECT: increased strength, plasticity, and processability of aluminum-based alloy with 9-11% magnesium.

2 cl, 2 dwg, 1 tbl