Titanium-based alloy and item made from it. RU patent 2507289.

IPC classes for russian patent Titanium-based alloy and item made from it. RU patent 2507289. (RU 2507289):

C22C14/00 - Alloys based on titanium

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Titanium-base alloy and article made of thereof / 2256713
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.

Brick made out of a titanium alloy and a method of its production / 2259413
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.

Alloy on the base of titanium and a hardware product out of it / 2259414
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.

Material with a memory effect of the form / 2259415
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.

Construction material from pure titanium and method for manufacturing the same / 2266345
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.

Titanium-base alloy / 2269584
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.

Titanium-based high-strength alpha-beta alloy / 2277134
Specification gives versions of titanium-based alpha-beta alloys. The proposed alloy contains the following components: aluminum, 4.5-5.5; vanadium, 3.0-5.0; molybdenum, 0.3-1.8; iron, 0.2-0.8; oxygen, 0.12-0.25; by-elements and admixtures, lesser than 0.1 each; total amount of by-elements and admixtures is lesser than 0.5; the remainder being titanium.

FIELD: metallurgy.

SUBSTANCE: titanium-based alloy contains the following, wt %: Al 5.0-6.6, Mo 1.5-2.5, Zr 1.0-2.8, V 0.4-1.4, Fe 0.08-0.40, Si 0.08-0.28, Sn 1.5-3.8, Nb 0.4-1.2, O 0.02-0.18, C 0.008-0.080, Ti is the rest.

EFFECT: alloy has high strength characteristics at high temperatures, increased processibility level at hot deformation.

2 cl, 3 tbl, 3 ex

The invention relates to the non-ferrous metallurgy, namely, the production of titanium alloys, and can be used for heavy-loaded parts and units, operating at temperatures up is 550 (C long-and at 600C briefly, for example, for buildings and compressor parts, such as spacers and blades of gas-turbine engines (GTE), as well as other parts of aerospace and mechanical engineering.

Known alloys based on titanium has the following chemical composition,% Mas.:

Al 5,35-6,1 Mo

0,15-0,75

Zr 3,25-5,0 Si 0,2-0,6 Sn 3,5-4,5 Nb 0,5-1,5 C 0,03-0,1 Ti rest

(US patent # 4770726).

From a known base alloy of titanium are produced disks and blades of compressors of a high pressure turbine engines.

The disadvantage of alloy and products made from it, is relatively low strength of semi-finished products and parts in the annealed condition. Therefore the alloy used mainly after hardening heat treatment (quenching in oil and the subsequent aging).

Alloy in state has reduced the characteristics of plasticity (d & GE 6%; ψ & GE 15%) and high sensitivity to hubs stresses, as well as a narrow temperature interval of intense hot deformation, which has a value of about 50 C.

Products made from this alloy, require a high quality surface after machining, have a high value and therefore have limited use.

Known alloys based on titanium has the following chemical composition,% Mas.:

Al 5,5-6,5 Mo 0,3-0,5 Zr 3,5-4,5 Fe ≤0,03 Si

0,35-0,55

Sn 2,0-4,0 O ≤0,14 Ti rest

(Patent EP №0269196).

From the well-known alloy disks are made of high pressure compressor gas turbine engines.

The disadvantages of this alloy is the low level of strength characteristics at temperatures up is 550 (C, increased sensitivity alloy for the admixture of iron, which limits the use of alloy. Alloy and products made from it, and have low fatigue characteristics of coarse-grained structure.

Known alloys based on titanium has the following chemical composition,% Mas.:

Al 5,5-6,5 Mo 0,7-3,0 Zr 0,7-5,0 Si

0,04-0,13

1.7 to 2.3

the rest (US Patent # 3833363).

From the well-known alloy manufactured housing, disks and blades of compressors of a high pressure gas-turbine engines, and blades and other parts of turbines of power plants, long working at temperatures up to 500 C.

The disadvantages of this alloy is the low level of strength and fatigue characteristics in the temperature range from 20 C to 500 C.

Products made from this alloy, have low operating life.

Known alloys based on titanium has the following chemical composition,% Mas.:

a 6.2-7,0

Mo 0,4-1,0 Zr 3,5-4,5 Si 0,1-0,22 Sn 2,2-3,5 Nb 0,5-1,5 O

0,05-0,12

C 0,02-0,1 Ti rest

(Patent RF №2039112).

From the well-known alloy produced disks and blades of compressors of a high pressure gas turbine engines with a working temperature of up to 600 OC

Disadvantages alloy are low strength characteristics, reduced thermal stability (d & GE 3,5% after operating for 100 hours at 600C), narrow temperature interval of intense deformation in the mushy region (about 80 C) due to the high total content of aluminum, tin and zirconium, which makes it impossible to manufacture thin sheets and body parts.

Known alloys based on titanium has the following chemical composition,% Mas.:

Al 5,8-6,6 Mo 0,8-1,5 Zr 2,0-4,0 Fe

0,06-0,13

0,25-0,45

Sn 2,5-4,5 Nb 0,8-2,5 O

0,05-0,12

C 0,05-0,1 W 0,35-0,8 Ti rest

and product made of it (RF Patent №2039112).

From the well-known alloy produced disks and blades of compressors of a high pressure gas turbine engines.

The disadvantage of the alloy is relatively low strength at temperatures 20-550°C and narrow temperature interval of intense deformation in the mushy region (about 100 degrees C) because of the increased total content of elements, stabilizing the alpha phase and neutral (aluminum, zirconium, tin), which limits the use of alloy.

The closest analogue for the purpose and essential features, taken as a prototype, is based alloy of titanium, which has the following chemical composition,% Mas.:

Al 5,5-7,0 Mo 0,5-2,0 Zr 1,5-2,5 V 0,8-2,5 Fe 0,03-0,3 W

0,001-0,10

0,001-0,08

0,001-0,02

0,001-0,10

0,003-0,3

0,001-0,10

Ti rest

and product made of it (RF Patent №2308497).

Alloy prototype manufactured housing (including made of sheets), rings, spacers and guide vanes GTE compressor long running at temperatures up to 450 C and briefly up to 500 C.

The disadvantage of the alloy is the low level of strength characteristics in the range of operating temperatures, sharp reduction of the strength characteristics at temperatures over 500 C, which limits the application of the alloy. The alloy used in the annealed condition, not hardened by heat treatment. Semi-finished products of alloy have anisotropic structure and mechanical properties of low temperature annealing.

An object of the invention is to create a base alloy of titanium, having increased strength properties at temperatures up to 600 degrees C with high level of technologies in hot deformation.

The goal of the project is proposed based alloy of titanium, which contains aluminium, molybdenum, zirconium, vanadium, iron, characterized in that it additionally contains tin, niobium, silicon, oxygen, and carbon in the following ratio of components, mass%:

Al 5,0-6,6 Mo 1,5-2,5 Zr 1,0-2,8 V 0,4-1,4 Fe

0,08-0,40

0,08-0,28

Sn 1,5-3,8 Nb 0,4-1,2 O

0,02-0,18

0,008-0,080

Ti rest

and product made of it.

The proposed alloy can be used for the manufacture of shells and the rotary parts of the compressor of a high pressure gas-turbine engines, and components of power stations including the turbine blades.

The additional introduction of niobium, tin and silicon allow to enhance the strength characteristics of the alloy in the range of operating temperatures when the declared content of other components.

The increase in the minimum total content of elements beta stabilizers (molybdenum, vanadium, iron), the additional introduction of niobium in the proposed alloy allows to improve technology, including hot deformation of the alloy by increasing the number of stable beta phase. The alloy additionally contains elements of implementation (alpha-stabilizers) - oxygen and carbon, which increase the temperature of polymorphic transformation and compensate for the decreasing levels of aluminum to increase the degree of hardening and extension of the temperature range of deformation in the mushy region. The above features of the alloy chemical composition provide extension of the interval of temperatures of intensive deformation at 60 C. The proposed alloy strain temperature is in the range of 1,000 degrees Celsius up to 840 C, which is 160 degrees C. For alloy prototype of this interval corresponds to temperatures 980 deg C-880 C, which is 100 degrees C. the Presence of the proposed alloy, silicon allows to combine both and dispersion mechanisms of hardening, and also provides the possibility of additional increase the strength characteristics of the alloy and the products made from it by varying modes of treatment.

Increasing technological temperature interval increases the degree of recrystallization alpha-phase heat treatment that allows to increase the degree of homogeneity of the structure and mechanical properties of the product, leads to the reduction of cost of manufacture of deformed semi-finished products and components, including the way of sheet punching, possessing an elevated strength characteristics at temperatures up to 600 OC

Examples of the implementation of

The proposed alloy ingots smelted using the dual vacuum-arc remelting. Then ingots were subjected to multistage forging. The received product (the deformed semi - accurate forming thickness of section 25 mm, sheet 1.2 mm thick) thermally processed by the mode of annealing and hardening heat treatment (quenching in water or oil with further aging and air cooling).

Compositions of the proposed alloy (№1-3) and alloy prototype №4 are presented in table. 1. Mechanical properties of the proposed alloy and alloy of the prototype is shown in table. 2 (stamping), in the table. 3 (sheets). As seen from table. 2 and 3 of the proposed alloy has increased by 50-100°C operating temperature durability level of 10.5 15.5% in the annealed condition, with preservation of the high indicators of plasticity (relative elongation, narrowing). Alloy can further increase the level of strength characteristics in the range of operating temperatures not less than 20% compared with an alloy of the prototype.

The use of the proposed alloy on the basis of titanium and articles thereof, including details of the compressor aviation GTE - buildings, washers, spacers, blades and other, as well as parts of turbines, power machine building, for example turbine blades, will increase the operating temperature up to 600 degrees C, reducing the Prime cost of products by improving technologies in hot deformation, will increase the resource of work.

Table 1 № item Al Mo Zr V Fe Si Sn Nb O C Cu Ni Mn H Cr W Ti 1 5,0 1,5 1,0 0,4 0,08 0,08 1,5 0,4 0,02 0,008 - - - - - - leave 2 5,8 2,0 1,9 1,0 0,24 0,18 2,7 0,8 0,12 0,035 - - - - - - “-“ 3 6,6 2,5 2,8 1,4 0,40 0,28 3,8 1,2 0,18 0,080 - - - - - - “-“

Prototype

6,7 1,5 2,2 1,8 0,2 - - - - - 0,05 0,01 0,05 0,15 0,05 0,05 “-“ Table 2 № item

Kind of heat treatment

Ultimate strength at 20 C, MPa

Elongation at 20 C, %

Relative narrowing of 20 C, %

Tensile strength in 500o, MPa

Tensile strength is 550 (C, MPa

Tensile strength at 600C, MPa

annealing

1055 25,5 41,0 700 665 580

hardening and aging

1145 14,5 22,5 785 755 650 2

annealing

1125 16,5 29,5 725 690 635

hardening and aging

1215 7,4 15,5 810 765 660 3

annealing

1210 8,8 18,5 785 760 675

hardening and aging

1360 6,7 15,5 850 790 705 4

Prototype, annealing

955 14,5 31,5 635 590 515

Table №3

№ item

Kind of heat treatment

Ultimate strength at 20 C, MPa

Elongation at 20 C, %

Tensile strength in 500o, MPa

Tensile strength is 550 (C, MPa

Tensile strength at 600C, MPa

annealing

1105 16,5 725 645 545

hardening and aging

1195 12,5 790 760 600 2

annealing

1125 14,5 755 695 575

hardening and aging

1205 10,5 830 785 615 3

annealing

1275 12,0 795 780 590

hardening and aging

1330 6,5 865 825 630 4

Prototype, annealing

995 11,5 645 595 470

1. Based alloy of titanium, which contains aluminium, molybdenum, zirconium, vanadium, iron, characterized in that it additionally contains a tin, niobium, silicon, oxygen, and carbon in the following ratio of components, mass%:

Al 5,0-6,6 Mo 1,5-2,5 Zr 1,0-2,8 V 0,4-1,4 Fe

0,08-0,40

0,08-0,28

Sn 1,5-3,8 Nb 0,4-1,2 O

0,02-0,18

0,008-0,080

Ti rest

2. The product of the base alloy of titanium, wherein it is made from an alloy of claim 1.