METHOD OF HEAT TREATMENT OF LARGE-SIZE PRODUCTS FROM HIGH-STRENGTH TITANIUM ALLOY

摘要

FIELD: metallurgy.;SUBSTANCE: method of heat treatment of large-size products from high-strength titanium alloy containing wt %: 4.0…6.3 of aluminium, 4.5…5.9 of vanadium, 4.5…5.9 of molybdenum, 2.0…3.6 of chrome, 0…5 of zirconium, 0…6 of stannum, 0…0.5 of silicon, titanium and inevitable impurity - the rest, includes cooling with V₁3°C /min of single-phase β-area up to the temperature T₁370°C and the subsequent aging at the temperature T₂=370…600°C during 1…12 hours. After aging the additional heating and processing of alloy in the range T₃=T₂…T_β within 1…12 hours, cooling at the speed V₂V₁ up to the temperature T₄ which isn't higher than T₂ temperature, and the subsequent repeated aging in the range of the temperatures T₂ within 1…12 hours.;EFFECT: increase of strength and impact viscosity.;2 cl, 1 dwg, 1 tbl, 1 ex