FIELD: metallurgy.
SUBSTANCE: method of heat treatment of item out of wrought alloy "BT23" means, that item is heated to 850°C, held for 1 h, cooled in water and subjected to ageing at temperature 550°C for 10 h. Then item is heated, held at 300-400°C and further cooled to 20 h (-10) °C at simultaneous action of gas flow and acoustic field of sound frequency range with sound pressure 140-160 dB. Grains of proeutectoid constituent of α-solid solution are milled, as all structural components, the intragranular structure is formed with dislocations forming in form of regular formation and with decreasing of the internal microstresses at phase boundary.
EFFECT: increased strength upon satisfactory plasticity, and increased relaxational endurance of alloys.
1 dwg, 2 tbl
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