RU2017116679A - Titanium-based alloy for elastic elements and a method for producing this alloy - Google Patents

Claims (14)

1. A workpiece for the manufacture of elastic elements from an alloy based on titanium containing aluminum; molybdenum; vanadium; iron; titanium - the rest, including heating, aging at a given temperature, deformation, cooling and aging, characterized in that the alloy has the following ratio of components, wt. %: aluminum 1.2-4.5 molybdenum 3,5-6,5 vanadium 3.0-6.0 iron ≤0.5 carbon ≤0.3 hydrogen ≤0.03 oxygen ≤0.3 nitrogen ≤0.15 silicon ≤0.5 zirconium ≤1.0 a uniform, finely dispersed microstructure with a grain size of (1-5) μm orthorhombic martensitic α '', at the boundaries of which globular particles of the primary α-phase are located. 2. The workpiece according to claim 1, characterized in that the energy intensity of the workpiece in the parameter τ ² / G is more than 20, and the parameter τ ² / ρG is more than 4.7, where τ is the largest tangential stress, MPa, G is the elastic modulus for shear, MPa, ρ - density, g / cm ³ . 3. The workpiece according to claim 1, characterized in that the tensile strength is not less than 900 MPa, the tensile strength is not less than 1500 MPa, with a ratio of σ _0.2 / σ _B - not less than 0.9, where σ _0.2 - yield strength, MPa, σ _In - tensile strength, MPa. 4. A method of obtaining a workpiece according to any one of paragraphs 1-3 for the manufacture of elastic elements from an alloy based on titanium containing, by weight. %: aluminum 1.2-4.5 molybdenum 3,5-6,5 vanadium 3.0-6.0 iron ≤0.5 carbon ≤0.3 hydrogen ≤0.03 oxygen ≤0.3 nitrogen ≤0.15 silicon ≤0.5 zirconium ≤1.0 titanium rest, and having a uniform, finely dispersed microstructure with a grain size of (1-5) μm orthorhombic martensitic α '', along the boundaries of which are globular particles of the primary α-phase, including heating, aging at a given temperature, deformation, cooling and aging, characterized in that heating the preform is carried out to a temperature of (920-1000) ° C, keeping at this temperature for 70-140 minutes, and then hot deformation is carried out at a degree of deformation of (90-95)% and subsequent cooling to water, then cold deformation is carried out with a degree of d strain (23-73)%, then aging is carried out at a temperature of (390-490) ° C for 2-8 hours. 5. The method according to p. 4, characterized in that the hot deformation is carried out by hot extrusion. 6. The method according to p. 5, characterized in that the energy intensity of the workpiece in the parameter τ ² / G is more than 20, in the parameter τ ² / ρG is more than 4.7, the tensile strength is not less than 900 MPa, the tensile strength - at least 1500 MPa, with a ratio of _0.2 / σ _B - at least 0.9, where τ is the largest shear stress, MPa, G is the shear modulus, MPa, ρ is the density, g / cm ³ , σ _{0, 2} - yield strength, MPa, σ _B - tensile strength, MPa.