TITANIUM-BASED ALLOY AND METHOD OF THERMAL TREATMENT OF LARGE-SIZE SEMIPRODUCTS FROM SAID ALLOY Russian patent published in 2001 - IPC

FIELD: manufacture of large-size forgings, stampings, massive plates, billets, attachment components and other components of aircraft equipment. SUBSTANCE: alloy comprises, wt %: aluminum, 4.0-6.3; vanadium, 4.5-5.9; molybdenum, 4.5-5.9; chromium, 2.0-3.6; iron, 0.2-0.5; and titanium, the balance. In this case value of molybdenum equivalent Mo_equ is at least 13.8. Method comprises heating large-size semiproducts to temperature t_{β←→α+β} = (30-70)^°C, maintaining said semiproducts at temperatures from 540 to 600 for 8 to 16 hours. EFFECT: reglamentation of optimum combination of β-stabilizing members in final semiproduct and higher level of strength of massive large-size components with thickness of 150-200 mm is attained. 5 cl, 2 tbl