FIELD: metallurgy.
SUBSTANCE: invention relates to the technology of intensive deformation treatment of AMg 6 aluminium alloy and can be used in production of deformed semi-finished products and light-weight products therefrom for using in aerospace, shipbuilding and automotive industries. Method for producing the blank from a high-strength and corrosion resistant AMg6 aluminium alloy includes casting the alloy and thermomechanical treatment of the casting. Thermomechanical treatment of the casting is carried out by multi-equal channel angular pressing (ECAP) at deformation rate of 0.4 mm/s in two stages with production of a blank, at the first stage one ECAP cycle is carried out at the temperature of 145-150°C. At the second stage, the second EACP cycle and subsequent ECAP are carried out at the temperature of 165-240°C with stepped temperature increase in each cycle till total true degree of deformation e=2.8 and average grain size 0.3-0.5 mcm is reached. The second stage is carried out with holding the blanks for 5-10 minutes before each cycle directly in the working channel of the ECAP unit at the temperature of each ECAP cycle.
EFFECT: upgraded strength and corrosion resistance.
3 cl, 1 dwg, 1 tbl, 2 ex
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