FIELD: metallurgy.
SUBSTANCE: method includes homogenisation of a bar, heating to 360-450°C, hot rolling, cold rolling with extent of deformation of 45-70% and intermediate annealing, and final thermal treatment, including three-stage artificial ageing according to the following mode: first stage at 80-125°C for 8- 24 hr, second stage at 130-180°C for 4-30 hr and third stage at 145-180°C for 2-18 hr or double-stage ageing, including the first and second, or the second or third, or the first or third stages.
EFFECT: application of the proposed technology will make it possible to produce rolled semi-finished products with improved operating properties, due to production of a fine-grain recrystallised structure and isotropy of properties.
3 cl, 5 ex, 8 tbl, 1 dwg
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