RECRSYTALLISED ALUMINIUM ALLOYS WITH BRASS TEXTURE AND METHODS OF THEIR PRODUCTION Russian patent published in 2013 - IPC C22C21/12 C22F1/57 

FIELD: metallurgy.

SUBSTANCE: recrystallised rolled sheet of aluminium alloy 2xxx features height not exceeding 12.7 mm (0.5 inch). At least 60% of said rolled sheet are recrystallised grains. Sid rolled stock features brass and Goss textures. Note here that brass texture makes at least 10 and is larger than Goss texture. Proposed method comprises hot rolling and cold processing of aluminium 2xxx alloy sheet, subjecting said sheet to first recrystallisation annealing, at least one stape (i) of cold processing and (ii) reducing annealing, (d) second recrystallisation annealing and (e) age-hardening.

EFFECT: recrystallised rolled sheet of aluminium alloy 2xxx with better strength and ductility.

44 cl, 21 dwg, 1 tbl, 5 ex