Alloy on the base of titanium and a hardware product out of it

FIELD: nonferrous metallurgy; aircraft industry; mechanical engineering; development of alloys on the basis of titanium.

SUBSTANCE: the invention is pertaining to the field of nonferrous metallurgy, in particular, to development of alloys on the base of titanium, working at the heightened temperatures. It may be used in an aircraft industry for manufacture of components, for example, disks, vanes, rings, and also in mechanical engineering. The invention presents an alloy based on titanium and a hardware product produced out of it. The alloy contains aluminum, zirconium, stannum, niobium, a molybdenum, silicon, carbon and oxygen. At that it in addition contains tungsten and iron, at the following ratio of components (in mass %): aluminum 5.8 - 6.6, zirconium 2.0 - 4.0, stannum - 2.5 - 4.5, niobium - 0.8-2.5, molybdenum - 0.8- 1.5, silicon - 0.25-0.45, carbon - 0.05-0.1, oxygen -0.05-0.12, tungsten - 0.35-0.8, iron - 0.06-0.13, titanium - the rest. The technical result is a development of an alloy having the lower weight at the given short-time strength and a specific low-cycle fatigue, that increases an operational life and reliability of the components of the hot tract of aero-engines.

EFFECT: the invention ensures development of an alloy with the lower weight at the given short-time strength and a specific low-cycle fatigue with increased operational life and reliability.

2 cl, 2 tbl, 3 ex

 

The invention relates to the field of metallurgy, in particular to the development of alloys based on titanium, operating at elevated temperatures.

The invention can be used in the aviation industry for the manufacture of parts of aircraft engines (discs, vanes, rings and others), machine building and other industries. Known alloy based on titanium, having the following chemical composition, wt.%:

Aluminum5,35 of 6.1
Zirconia3,25-5,0
Tin3.5 to 4.5
Niobium0.5 to 1.5
Molybdenum0,15-0,75
Silicon0,2-0,6
Carbon0,03-0,1
TitaniumRest

(Patent EP No. 0107419).

Known alloy based on titanium, having the following chemical composition, wt.%:

Aluminum5,5-6,5
Zirconia3.5 to 4.5
Tin2,0-4,0
Molybdenum0,3-0,55
Silicon0,35-0,55
Oxygen<0,14
Iron<0,03
Titanium Rest

(Patent EP No. 0269196).

Known alloys have lower values of short-term strength at operating temperatures of 500-600°and thermal stability of a shot with a crack. Details of aircraft engines (discs, vanes, rings, etc.), made of known alloys have limited life time operating temperature.

The closest analogue, taken as a prototype, is based alloy of titanium, having a composition, wt.%:

Aluminum6,2-7,2
Zirconia3.5 to 4.5
Tin2,2-3,5
Niobium0.5 to 1.5
Molybdenum0,4-1,0
Silicon0,1-0,22
Carbon0,02-0,1
Oxygen0,05-0,12
TitaniumRest
If total
the content of aluminum and tina 9.2-9.7 wt.%
silicon and oxygen0,22-0,25%

(RF patent 2039112).

Alloy-a prototype is not a high value of the specific limit short-term strength at temperatures of 500-600°With specific low-cycle fatigue under axial load on the AZE 10 4cycles at temperatures of 20 and 550°. Details of aircraft engines (discs, vanes, rings, etc.), made of an alloy of the prototype, have a limited resource at temperatures above 500°C.

The technical task of the invention to provide an alloy having a specific long-term strength and specific creep-level prototype and having better characteristics specific short-term strength at temperatures of 500-600°and specific low-cycle fatigue on the basis of 104cycles in the temperature range 20...600°that can improve the reliability of parts of aircraft engines.

To achieve the technical objectives of the proposed alloy comprising aluminum, zirconium, tin, niobium, molybdenum, silicon, carbon, oxygen, which further comprises tungsten and iron, in the following ratio, wt.%:

Aluminumthe 5.8 to 6.6
Zirconia2,0-4,0
Tin2,5-4,5
Niobium0,8-2,5
Molybdenum0,8-1,5
Silicon0,25-0,45
Carbonthe 0.05-0.1
Oxygen0,05-0,12
Wolfram 0,35-0,8
Iron0,06-0,13
Titaniumrest

and products made from it.

Of the proposed alloy can be manufactured stamping, forgings, rods, rings and parts of them, working at temperatures of 500-600°C.

The authors found that the introduction of additional tungsten and iron-based alloy of titanium with the stated components while increasing silicon concentration compensates for the loss of short-term strength and low-cycle fatigue caused by the decrease in the concentration of impurities in the alloy. The introduction of tungsten and iron in concentrations that are a little higher than their solubility in α- titanium and at the same time precluding the flow of eutectoid reaction, slows down the processes of redistribution of alloying elements between α and β-phases, which increases thermal stability of the alloy and the resource.

The increased content of silicon in the alloy leads to a partial replacement of the intermetallic hardening α2(Al+Sn) silicide due to the formation of complex silicides (TiZr)5Si3and carboxylation (TiZr)3(SiC)2who in the form of dispersed precipitates strengthen the alloy, increasing the high-temperature specific short-strength and low-cycle fatigue on the basis of 104cycles in the range of topics is of erator 20-600° With, while maintaining high heat resistance and creep resistance.

Examples of implementation

Ingots of the proposed alloys produced according to the production technology of titanium alloys, which includes the manufacture of blended materials consumable electrode and smelting ingots triple vacuum arc remelting. Machined castings were subjected to forging and rolling with the purpose of obtaining a semi-finished - bars with a diameter of 25 mm Rods were subjected to heat treatment: double annealed.

The formulations of the alloy (No. 1-3) and alloy - prototype No. 4 shown in table 1. Properties of the proposed alloy and prototype are shown in table 2.

Table 1
№p/pThe content of components in wt, %
AlZrSnNbMoSiOWFeTi
15,82,04.50,80,80,250,050,050,350,06OST
26,23,53,5 1,61,00,350,080,080,50,10OST
36,64,02,52,51,50,450,100,120,80,13OST
46,74,22,81,00,70,150,070,10--OST

Table 2
№p/pProperties at temperatures °
20550600
σin/ρ, kmσ0/ρ, km (N=104cycleσin/ρ, kmσ0/ρ, km (N=104cycleσin/ρ, kmσ100/ρ, kmσof 0.2/100/ρ, km
samples of smoothsamples with notch r=0.25 mmsamples of smoothsamples with notch r=0.25 mm
1/td> 23,821,310,418,614,07,7of 17.57,9of 3.64
225,421,810,919,314,68,318,27,95of 3.64
325,922,011,320,015,48,618,67,953,66
423,819,58,815,812,56,514,17,9of 3.64
Note: the density of the alloys No. 1-4 equal to 4.4 g/cm3.

As can be seen from table 2, the proposed alloy has a specific long-term strength (σ100/ρ) and specific creep (σof 0.2/100/ρ) alloy prototype and superior alloy prototype on specific short-term strength (σin/ρ) at temperatures of 500-600°17.1-24.1 per cent, according to specific low-cycle fatigue (σ0/ρ) at 20 and 50°: on smooth samples 9.2-12%, for samples with a cut 18.2-18.4 per cent, on the basis of 104the loops.

The use of the alloy by increasing the share of short-term strength and the specific is alacyclovir fatigue will reduce weight, to increase the life and reliability of the hot parts of the tract of aircraft engines.

1. The base alloy of titanium including aluminum, zirconium, tin, niobium, molybdenum, silicon, carbon and oxygen, characterized in that it further contains tungsten and iron in the following ratio, wt.%:

Aluminumthe 5.8 to 6.6
Zirconia2,0-4,0
Tin2,5-4,5
Niobium0,8-2,5
Molybdenum0,8-1,5
Silicon0,25-0,45
Carbonthe 0.05-0.1
Oxygen0,05-0,12
Wolfram0,35-0,8
Iron0,06-0,13
TitaniumRest

2. A product made from an alloy based on titanium, characterized in that it is made from an alloy according to claim 1.



 

Same patents:

FIELD: non-ferrous metallurgy; methods of titanium alloy bricks production.

SUBSTANCE: the invention is pertaining to the field of non-ferrous metallurgy, in particular, to the brick made out of α+β titanium alloy and to a method of its manufacture. The offered brick consists of the following components (in mass %): aluminum - 4-5, vanadium - 2.5-3.5, iron - 1.5-2.5, molybdenum - 1.5-2.5, titanium - the rest. At that the alloy out of which the brick is manufactured, contains - 10-90 volumetric % of the primary α-phase. The average grain size of the primary α-phase makes 10 microns or less in a cross-section plain parallel to the brick rolling direction. Elongation of grain of the primary α -phase is the four-fold or less. The offered method of manufacture of the given brick includes a stage of a hot rolling. At that before the stage of the hot rolling conduct a stage of the alloy heating at the surfaces temperature (Tβ-150)- Tβ°C. During realization of the stage of the hot rolling the surface temperature is kept within the range of (Tβ-300)-( Tβ -50)°C, and the final surface temperature, that is a surface temperature directly after the last rolling, makes (Tβ-300)-( Tβ-100)°C, where Tβ is a temperature of α/β-transition. The technical result of the invention is formation of a brick out of the high-strength titanium alloy having a super pliability, excellent fatigue characteristics and moldability.

EFFECT: the invention ensures production of a brick out of the high-strength titanium alloy having a super pliability, excellent fatigue characteristics and moldability.

7 cl, 7 dwg, 21 tbl, 2 ex

FIELD: metallurgy.

SUBSTANCE: invention proposes titanium-base alloy and article made of thereof. Alloy comprising aluminum, molybdenum, vanadium, chrome, iron, zirconium, oxygen, carbon, hydrogen, nitrogen, copper and nickel comprises additionally silicon and tungsten in the following ratio of components, wt.-%: aluminum, 2.0-6.8; molybdenum, 1.0-3.5; vanadium, 3.0-6.0; chrome, 0.4-1.6; iron, 0.2-1.2; zirconium, 0.01-0.3; oxygen, 0.04-0.14; carbon, 0.02-0.1; hydrogen, 0.003-0.02; nitrogen, 0.005-0.05; copper, 0.001-0.1; nickel, 0.001-0.01; silicon, 0.02-0.15; tungsten, 0.001-0.03, and titanium, the balance. Invention provides the development of titanium alloys designated for making plane stringers, ribs, frames, fuselage, wings and engines and for applying as material for welding. Invention provides enhancing strength and crack-resistance of the basic alloy and welding joints and reducing article mass.

EFFECT: improved properties and quality of alloy.

3 cl, 2 tbl, 3 ex

FIELD: metallurgy, namely processes for forging titanium alloys and blank of such alloy suitable for forging.

SUBSTANCE: method comprises steps of preparing blank and forging it. Forging is realized at providing mechanical hardening factor equal to 1.2 or less and at difference of hardness values between central (along width) zone and near-surface zone equal to 60 or less by Vickers. Factor of mechanical hardening is determined as HV(def)/HV(ini), where HV(ini) - hardness of titanium alloy blank before forging; HV(def) -hardness of titanium alloy blank after forging at forging reduction 20%. Forging may be realized at deformation rate from 2 x 10 -4 s -1 to 1s-1 while keeping relations (T β - 400)°C ≤ Tm ≤ 900°C and 400°C ≤ Td ≤ 700°C, where Tβ (°C) -temperature of β-phase transition of titanium alloy, T m(°C) - temperature of worked blank; Td(°C) - temperature of die set. Blank has factor of mechanical hardening 1.2 or less and difference of hardness values between central (along width) zone and near-surface zone equal to 60 or less by Vickers.

EFFECT: possibility for forging titanium alloy blanks at minimum difference of material properties along depth, simplified finishing of blank surface after forging, reduced cracking of blank material, good workability of blank with favorable ductility and fatigue properties.

8 cl, 5 tbl, 6 dwg, 4 ex

FIELD: powder metallurgy, namely sintered titanium base alloys used as constructional materials.

SUBSTANCE: sintered titanium base alloy contains, mass. %: aluminum, 5.5 - 7.0; zirconium, 1.4 -2.5; molybdenum,, 0.5 - 1.8; vanadium,, 0.8 -2.3; titanium, the balance. Alloy is prepared of powder of said content with particle size in range 0.5 - 3.0 micrometers. Structure of particles includes martensite α - phase and ω-phase with coherent dissipation range 300 - 600 Å. Percentage density of alloy - 99.6%. In structure of alloy there is no α2 - phase. Alloy is prepared by compacting under pressure 1200 Mpa, sintering at 1523 K for 3 hours in vacuum 0.0133 Mpa, annealing at 723 - 823 K for 1.5 hours and cooling together with furnace until room temperature.

EFFECT: enhanced mechanical properties of alloy.

FIELD: metallurgy, in particular alloy with shape memory effect useful as implants in medicine, as temperature sensors, thermosensitive elements in equipment engineering, radio engineering, etc.

SUBSTANCE: claimed alloys contain a) (at. %) titanium 48-52; cobalt 20-30; and balance: gold; and b) titanium 48-52; iron 13,1-16; and balance: gold. Materials of present invention are free from nickel and have shape memory effect and superelasticity at human body temperatures that provides high biomechanical compatibility of implant made from the same in contacting region with various tissues of living organism.

EFFECT: alloys with excellent shape memory effect and superelasticity.

2 cl, 1 tbl, 1 ex

FIELD: mechanical engineering; piston internal combustion engines.

SUBSTANCE: invention relates to valve of internal combustion engine, method of its manufacture and heat-resistant titanium alloy used for manufacture of valve consisting of following components, mass %: aluminum 7.5-12.5; molybdenum 1.6-2.6; zirconium 1.4-2.4; silicon 0.1-0.2' yttrium 0.005-0.1; titanium - the rest. It has α+α2+β phase composition with intermetallide α2 phase on Ti3Al base dispersed in α phase. Proposed method includes forming of valve from cylindrical blank by deformation machining with preliminary heating and subsequent heat treatment. Preliminary heating of part of blank related to rod done to temperature 5-20oC lower than temperature of complete polymorphic transformation of alloy, and its deformation machining is carrying out by wedge cross rolling. Deformation machining of part of blank related to head is done by forging with preliminary heating to temperature 5-50oC higher than temperature of complete polymorphic transformation of alloy corresponding to beginning of forging, and forging is finished at temperature lower than complete polymorphic transformation of alloy to form plate head of valve and transition section provided smooth changing of head into rod. Invention provides designing of valve, method of its manufacture and heat-resistant alloy used in manufacture of valve making it possible to operate valve within operating temperature range owing to increased long-term strength and creep resistant of valve head material and increased strength, modulus of elasticity and hardness of valve rod material.

EFFECT: improved quality of valve and increased reliability in operation.

16 cl, 3 tbl, 1 ex, 15 dwg

The invention relates to the field of metallurgy, namely the creation of a modern titanium alloys used for manufacturing high-strength and high-tech products, including large, i.e

The invention relates to a method of manufacturing a rotor in the piece with the blades, which use the stub portion of the rotor is made in the preferred embodiment, titanium alloy, and are welded to her shoulder, in the preferred embodiment, also made of titanium alloy

The invention relates to the field of metallurgy, namely the creation of alloys based on titanium, intended for use as a structural material in the manufacture of medical devices and in the construction of chemical and petrochemical engineering

The invention relates to metallurgy and alloys based on titanium, designed for the production of structural parts, components and assemblies in the aerospace industry, shipbuilding, automotive, energy and chemical engineering

FIELD: mechanical engineering; piston internal combustion engines.

SUBSTANCE: invention relates to valve of internal combustion engine, method of its manufacture and heat-resistant titanium alloy used for manufacture of valve consisting of following components, mass %: aluminum 7.5-12.5; molybdenum 1.6-2.6; zirconium 1.4-2.4; silicon 0.1-0.2' yttrium 0.005-0.1; titanium - the rest. It has α+α2+β phase composition with intermetallide α2 phase on Ti3Al base dispersed in α phase. Proposed method includes forming of valve from cylindrical blank by deformation machining with preliminary heating and subsequent heat treatment. Preliminary heating of part of blank related to rod done to temperature 5-20oC lower than temperature of complete polymorphic transformation of alloy, and its deformation machining is carrying out by wedge cross rolling. Deformation machining of part of blank related to head is done by forging with preliminary heating to temperature 5-50oC higher than temperature of complete polymorphic transformation of alloy corresponding to beginning of forging, and forging is finished at temperature lower than complete polymorphic transformation of alloy to form plate head of valve and transition section provided smooth changing of head into rod. Invention provides designing of valve, method of its manufacture and heat-resistant alloy used in manufacture of valve making it possible to operate valve within operating temperature range owing to increased long-term strength and creep resistant of valve head material and increased strength, modulus of elasticity and hardness of valve rod material.

EFFECT: improved quality of valve and increased reliability in operation.

16 cl, 3 tbl, 1 ex, 15 dwg

FIELD: metallurgy, in particular alloy with shape memory effect useful as implants in medicine, as temperature sensors, thermosensitive elements in equipment engineering, radio engineering, etc.

SUBSTANCE: claimed alloys contain a) (at. %) titanium 48-52; cobalt 20-30; and balance: gold; and b) titanium 48-52; iron 13,1-16; and balance: gold. Materials of present invention are free from nickel and have shape memory effect and superelasticity at human body temperatures that provides high biomechanical compatibility of implant made from the same in contacting region with various tissues of living organism.

EFFECT: alloys with excellent shape memory effect and superelasticity.

2 cl, 1 tbl, 1 ex

FIELD: powder metallurgy, namely sintered titanium base alloys used as constructional materials.

SUBSTANCE: sintered titanium base alloy contains, mass. %: aluminum, 5.5 - 7.0; zirconium, 1.4 -2.5; molybdenum,, 0.5 - 1.8; vanadium,, 0.8 -2.3; titanium, the balance. Alloy is prepared of powder of said content with particle size in range 0.5 - 3.0 micrometers. Structure of particles includes martensite α - phase and ω-phase with coherent dissipation range 300 - 600 Å. Percentage density of alloy - 99.6%. In structure of alloy there is no α2 - phase. Alloy is prepared by compacting under pressure 1200 Mpa, sintering at 1523 K for 3 hours in vacuum 0.0133 Mpa, annealing at 723 - 823 K for 1.5 hours and cooling together with furnace until room temperature.

EFFECT: enhanced mechanical properties of alloy.

FIELD: metallurgy, namely processes for forging titanium alloys and blank of such alloy suitable for forging.

SUBSTANCE: method comprises steps of preparing blank and forging it. Forging is realized at providing mechanical hardening factor equal to 1.2 or less and at difference of hardness values between central (along width) zone and near-surface zone equal to 60 or less by Vickers. Factor of mechanical hardening is determined as HV(def)/HV(ini), where HV(ini) - hardness of titanium alloy blank before forging; HV(def) -hardness of titanium alloy blank after forging at forging reduction 20%. Forging may be realized at deformation rate from 2 x 10 -4 s -1 to 1s-1 while keeping relations (T β - 400)°C ≤ Tm ≤ 900°C and 400°C ≤ Td ≤ 700°C, where Tβ (°C) -temperature of β-phase transition of titanium alloy, T m(°C) - temperature of worked blank; Td(°C) - temperature of die set. Blank has factor of mechanical hardening 1.2 or less and difference of hardness values between central (along width) zone and near-surface zone equal to 60 or less by Vickers.

EFFECT: possibility for forging titanium alloy blanks at minimum difference of material properties along depth, simplified finishing of blank surface after forging, reduced cracking of blank material, good workability of blank with favorable ductility and fatigue properties.

8 cl, 5 tbl, 6 dwg, 4 ex

FIELD: metallurgy.

SUBSTANCE: invention proposes titanium-base alloy and article made of thereof. Alloy comprising aluminum, molybdenum, vanadium, chrome, iron, zirconium, oxygen, carbon, hydrogen, nitrogen, copper and nickel comprises additionally silicon and tungsten in the following ratio of components, wt.-%: aluminum, 2.0-6.8; molybdenum, 1.0-3.5; vanadium, 3.0-6.0; chrome, 0.4-1.6; iron, 0.2-1.2; zirconium, 0.01-0.3; oxygen, 0.04-0.14; carbon, 0.02-0.1; hydrogen, 0.003-0.02; nitrogen, 0.005-0.05; copper, 0.001-0.1; nickel, 0.001-0.01; silicon, 0.02-0.15; tungsten, 0.001-0.03, and titanium, the balance. Invention provides the development of titanium alloys designated for making plane stringers, ribs, frames, fuselage, wings and engines and for applying as material for welding. Invention provides enhancing strength and crack-resistance of the basic alloy and welding joints and reducing article mass.

EFFECT: improved properties and quality of alloy.

3 cl, 2 tbl, 3 ex

FIELD: non-ferrous metallurgy; methods of titanium alloy bricks production.

SUBSTANCE: the invention is pertaining to the field of non-ferrous metallurgy, in particular, to the brick made out of α+β titanium alloy and to a method of its manufacture. The offered brick consists of the following components (in mass %): aluminum - 4-5, vanadium - 2.5-3.5, iron - 1.5-2.5, molybdenum - 1.5-2.5, titanium - the rest. At that the alloy out of which the brick is manufactured, contains - 10-90 volumetric % of the primary α-phase. The average grain size of the primary α-phase makes 10 microns or less in a cross-section plain parallel to the brick rolling direction. Elongation of grain of the primary α -phase is the four-fold or less. The offered method of manufacture of the given brick includes a stage of a hot rolling. At that before the stage of the hot rolling conduct a stage of the alloy heating at the surfaces temperature (Tβ-150)- Tβ°C. During realization of the stage of the hot rolling the surface temperature is kept within the range of (Tβ-300)-( Tβ -50)°C, and the final surface temperature, that is a surface temperature directly after the last rolling, makes (Tβ-300)-( Tβ-100)°C, where Tβ is a temperature of α/β-transition. The technical result of the invention is formation of a brick out of the high-strength titanium alloy having a super pliability, excellent fatigue characteristics and moldability.

EFFECT: the invention ensures production of a brick out of the high-strength titanium alloy having a super pliability, excellent fatigue characteristics and moldability.

7 cl, 7 dwg, 21 tbl, 2 ex

FIELD: nonferrous metallurgy; aircraft industry; mechanical engineering; development of alloys on the basis of titanium.

SUBSTANCE: the invention is pertaining to the field of nonferrous metallurgy, in particular, to development of alloys on the base of titanium, working at the heightened temperatures. It may be used in an aircraft industry for manufacture of components, for example, disks, vanes, rings, and also in mechanical engineering. The invention presents an alloy based on titanium and a hardware product produced out of it. The alloy contains aluminum, zirconium, stannum, niobium, a molybdenum, silicon, carbon and oxygen. At that it in addition contains tungsten and iron, at the following ratio of components (in mass %): aluminum 5.8 - 6.6, zirconium 2.0 - 4.0, stannum - 2.5 - 4.5, niobium - 0.8-2.5, molybdenum - 0.8- 1.5, silicon - 0.25-0.45, carbon - 0.05-0.1, oxygen -0.05-0.12, tungsten - 0.35-0.8, iron - 0.06-0.13, titanium - the rest. The technical result is a development of an alloy having the lower weight at the given short-time strength and a specific low-cycle fatigue, that increases an operational life and reliability of the components of the hot tract of aero-engines.

EFFECT: the invention ensures development of an alloy with the lower weight at the given short-time strength and a specific low-cycle fatigue with increased operational life and reliability.

2 cl, 2 tbl, 3 ex

FIELD: medicine; instrument-making industry; radio industry; production of materials with a memory effect of the form.

SUBSTANCE: the invention is pertaining to the materials with a memory effect of the form and with the modified surface, which may be used as implants in medicine and as the temperature sensors, thermo-sensitive and executive elements and designs in instrument-making industry, the radio industry. The offered material consists of a base made out of a titanium nickelide of the following composition (in at. %): titanium - 49-51, nickel - the rest, and the surface layer modified by alloying elements. The modified surface layer is formed by irradiation with a low-energy high-current electronic beam and has a depth of 1000-2500 nanometers and the dimensions of the crystal grains of no more than 30 nanometers. In the capacity of the alloying elements it contains oxygen and carbon at the following ratio of components (in at. %): oxygen - 10-20, carbon - 10-15, titanium - 40-50, nickel - the rest. The technical result of the invention is production of the materials with an effect of memory of the form and a high degree capability of the form restoration both at a low and high deforming loadings.

EFFECT: the invention ensures production of the materials with an effect of memory of the form and a high degree capability of the form restoration both at a low and high deforming loadings.

1 tbl, 1 ex

FIELD: metallurgy, in particular, titanium-based materials resistant to change of color.

SUBSTANCE: construction material of pure titanium contains, wt%: Fe 0.08 or less; Nb 0.02 or less; Co 0.02 or less, and is provided with surface oxide film having thickness of 170Å or less. Method involves producing material from pure titanium; etching and heating to temperature X( C) within the range of from 130 C to 280 C for time T (min) satisfying condition of T≥239408xX-2,3237.

EFFECT: increased resistance to change of color for prolonged time as compared to traditional materials.

3 cl, 2 dwg, 4 tbl, 3 ex

Titanium-base alloy // 2269584

FIELD: metallurgy.

SUBSTANCE: invention relates to titanium-base alloys used in making high-strength and high-efficient articles. Titanium-base alloy consists of aluminum, vanadium, molybdenum, iron and oxygen. Components of alloy are taken in the following ratio, wt.-%: aluminum, 3.5-4.4; vanadium, 2.0-4.0; molybdenum, 0.1-0.8; iron, max 0.4; oxygen, max 0.25, and titanium, the balance. Invention provides the development of universal alloy for large-sized forged pieces and stamps, thin-sheet roll and foil possessing the necessary strength and plastic indices and structure.

EFFECT: improved and valuable properties of alloy.

2 tbl

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