METHOD FOR PRODUCING DEFORMED BILLET FROM ALUMINIUM ALLOY OF SYSTEM ALUMINIUM-MAGNESIUM - MANGANESE - SCANDIUM - ZIRCONIUM Russian patent published in 2012 - IPC C22F1/47 

FIELD: metallurgy.

SUBSTANCE: melt is overheated to a temperature of 760-800 °C with an exposure of 0.5-1.0 h, a billet is cast by continuous casting into the slide mould, the billet is annealed at a temperature of 360-380 °C for 3-8 h, production of a rectangular billet out of a square bar in the ratio of thickness to width ratio from 0.17 to 0.33. This is followed by deformation resulting from a bar of the billet using equal-channel angular pressing at an angle of channels intersection of 90 °C at a temperature of 305-325 °C with the number of passes of 8 to 10, which corresponds to a true deformation of 8 to 10, with back pressure equal to 40-50% of the applied pressure, and rotating the billet after each pass per 90 ° about the axis perpendicular to a bigger face of the billet, and passing through the centre of the billet. After the deformation of the billet using an equal channel angular pressing, cold rolling is carried out with a total compression of 75-80%, or cold rolling with a combined compression 80-95% followed by annealing at a temperature of 305-335 °C for 0.5-1.0 h with cooling to room temperature with a rate of 15-35 °C/h.

EFFECT: deformed billets with high mechanical strength while maintaining flexibility.

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