Patent ID: 8864918
Filing Date: 2014-10-21
Classification: B22F,C22C,C22F

Abstract:
1. A method for producing a component of a titanium-aluminum base alloy, comprising: (a) after a through heating for at least about 60 minutes, isostatically pressing, with an increase in pressure to at least about 150 MPa at a temperature of at least about 1000° C., an alloy produced by melting metallurgy or powder metallurgy and having a chemical composition of, in atomic %: Aluminum (Al) from about 41 to about 48 and, optionally, Niobium (Nb) from about 4 to about 9 Molybdenum (Mo) from about 0.1 to about 3.0 Manganese (Mn) up to about 2.4 Boron (B) up to about 1.0 Silicon (Si) up to about 1.0 Carbon (C) up to about 1.0 Oxygen (O) up to about 0.5 Nitrogen (N) up to about 0.5 remainder titanium and impurities, to form a blank, (b) subjecting the blank of (a) to a hot forming by a rapid solid-blank deformation at a rate of greater than about 0.4 mm/sec and a deformation by compression measured as local expansion φ of greater than about 0.3, φ being defined as: or to a different forming method with the same minimum deformation, followed by a cooling, wherein a time until a temperature of 700° C. is reached is no more than about 10 min., to form a component that has a deformation microstructure with high recrystallization energy potential, (c) subjecting the component of (b) to a heat treatment in a range of an eutectoid temperature (T ALPHA BETA GAMMA: globular surrounding the α (d) optionally, subjecting the component of (c) to at least one further heat treatment.