FIELD: metallurgy.
SUBSTANCE: invention relates to processing of cold-deformed alpha-beta-titanium alloys. Disclosed is method of increasing ultimate tensile strength of cold-deformed alpha-beta-titanium alloy, including thermal treatment of cold-deformed alpha-beta-titanium alloy on solid solution by heating of alpha-beta-titanium alloy in temperature range from β-transition temperature of alpha-beta-titanium alloy (Tβ)—106 °C to Tβ—72.2 °C for 15 minutes to 2 hours, cooling alpha-beta-titanium alloy with cooling rate of not less than 3000 °C per minute to ambient temperature, cold treatment of alpha-beta-titanium alloy to impart effective deformation in range from 13 percent to 35 percent and aging of alpha-beta-titanium alloy by heating alpha-beta-titanium alloy in temperature range from Tβ—669 °C to Tβ—517 °C for 1 to 8 hours, wherein after aging, the alpha-beta-titanium alloy has an ultimate tensile strength of at least 204.2 ksi.
EFFECT: alloys are characterized by high strength, resistance to formation of cracks during cold treatment.
36 cl, 6 dwg, 1 tbl, 4 ex
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