EP1392876A1 - Titanium-base alloy - Google Patents
Titanium-base alloyInfo
- Publication number
- EP1392876A1 EP1392876A1 EP02739008A EP02739008A EP1392876A1 EP 1392876 A1 EP1392876 A1 EP 1392876A1 EP 02739008 A EP02739008 A EP 02739008A EP 02739008 A EP02739008 A EP 02739008A EP 1392876 A1 EP1392876 A1 EP 1392876A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- titanium
- max
- alloy
- base alloy
- mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 23
- 239000000956 alloy Substances 0.000 title claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 7
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 7
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 6
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 239000011733 molybdenum Substances 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 6
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 4
- 239000001301 oxygen Substances 0.000 claims abstract description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 3
- 239000010936 titanium Substances 0.000 claims abstract description 3
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 238000003825 pressing Methods 0.000 description 6
- 229910001069 Ti alloy Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005275 alloying Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
Definitions
- the invention relates to the non-ferrous metallurgy, especially to the development of new titanium-base alloys offering high formability when seamless cold- worked tubes are manufactured for use in hydraulic systems of aerospace applications and sea vessels.
- titanium alloys Due to their high strength, light weight and corrosion resistance titanium alloys are used in hydraulic systems of aerospace applications where pipe fittings are produced by welding or highly elastic pressing.
- known titanium alloys have insufficient ductility to produce the fittings by elastic pressing.
- alloy Ti-3A1-2.5V One of known industrial titanium alloys, used in the hydraulic systems, is the alloy Ti-3A1-2.5V. This alloy features high formability during cold rolling and allows to produce fittings by elastic pressing at minimum values of yield point 515 MPa and ultimate strength 620 MPa (AMS 4943D, Seamless Annealed Pipes for Hydraulic
- Titanium alloy of the following composition in mass % is also known:
- This alloy is applicable for hot working, may be used for manufacture of hot- worked and seamless cold-worked pipes, possesses a favorable combination of high strength, formability and corrosion resistance but its ductility is insufficient to flare the pipe or to produce fittings by elastic pressing.
- the object of the invention is to propose titanium alloy possessing a combination of high strength, formability and corrosion resistance, suitable for manufacture of seamless cold-worked pipes for hydraulic systems of aerospace applications and sea vessels as well as for manufacture of pipe fittings by the elastic pressing method.
- titanium-base alloy containing aluminum, vanadium, molybdenum, zirconium, iron, nitrogen and additional carbon at the following content of components, mass %:
- This titanium-base alloy may also additionally contain palladium or ruthenium in the following quantities, mass %:
- the high ductility during cold rolling and expansion of the pipes is achieved due to higher content of the ⁇ -phase which increases the plasticity as a result of large number of sliding planes in the crystal lattice and of the deformation of the ⁇ -phase within the ⁇ -phase under the isostatic compression.
- zirconium and interstitial impurities content causes the increase in the ⁇ -phase quantity and strength but reduces the ductility.
- Increase in the ⁇ -stabilizer content reduces the alloy stability, causes grain growth during the heat treatment which also reduces the alloy ductility.
- the carbon content is below 0.01%, the yield point of the alloy is insufficient to ensure the performance capability of the piping in hydraulic systems.
- the carbon content exceeds 0.1% the ductility of the alloy decreases at pipe expansion so that the pipe to fitting connection cannot be made by elastic pressing. Additional alloying with palladium and ruthenium in the claimed limits increases the corrosion resistance of the alloy in the marine environment when the alloy is used in sea vessel piping.
- ingots with the composition shown in Table 1 have been melted in a vacuum arc furnace and pipes with the outside diameter of 1" and wall thickness of 0.051" were made from these ingots.
- the mechanical and corrosion properties of the pipes are shown in Table 2.
- the alloy with the claimed composition possesses high strength and ductility values in combination with high expansion and corrosion resistance and complies with the requirements for pipes used in hydraulic systems of aerospace applications and sea vessels.
- the outside diameter expansion was determined as the ratio of the outside diameter of the specimen after flaring to the initial outside diameter.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
Titanium-base alloy is disclosed containing, in mass %: Aluminum 2.5 - 4.0, Vanadium 2.5 - 4.0, Molybdenum 2.0 - 3.5, Zirconium 0.4 - 1.5, Iron 0.25 max, Nitrogen 0.03 max, Oxygen 0.15 max, Carbon 0.01 - 0,1, Other impurities - total 0.3 max and Titanium balance. In an embodiment the disclosed Titanium-base alloy may additionally contain 0.03 - 0.1 mass % of Palladium and 0.03 - 0.3 mass % of Ruthenium.
Description
TITANIUM-BASE ALLOY
The invention relates to the non-ferrous metallurgy, especially to the development of new titanium-base alloys offering high formability when seamless cold- worked tubes are manufactured for use in hydraulic systems of aerospace applications and sea vessels.
Due to their high strength, light weight and corrosion resistance titanium alloys are used in hydraulic systems of aerospace applications where pipe fittings are produced by welding or highly elastic pressing. However, known titanium alloys have insufficient ductility to produce the fittings by elastic pressing.
One of known industrial titanium alloys, used in the hydraulic systems, is the alloy Ti-3A1-2.5V. This alloy features high formability during cold rolling and allows to produce fittings by elastic pressing at minimum values of yield point 515 MPa and ultimate strength 620 MPa (AMS 4943D, Seamless Annealed Pipes for Hydraulic
Systems, Made of Alloy Ti-3A1-2.5V, UNSR56320).
Titanium alloy of the following composition in mass % is also known:
Aluminum 2.5 - 4.5
Vanadium 2.0 - 3.0
Molybdenum 0.5 - 2.0
Zirconium 0.5 - 2.0
Iron 0.20 max
Nitrogen 0.03 max
Oxygen 0.15 max
Ref. German patent application DE 19533743 Al, Int. Cl. C22C 14/00, published 13.03.97, as prior knowledge.
This alloy is applicable for hot working, may be used for manufacture of hot- worked and seamless cold-worked pipes, possesses a favorable combination of high strength, formability and corrosion resistance but its ductility is insufficient to flare the pipe or to produce fittings by elastic pressing.
The object of the invention is to propose titanium alloy possessing a combination of high strength, formability and corrosion resistance, suitable for manufacture of seamless cold-worked pipes for hydraulic systems of aerospace applications and sea vessels as well as for manufacture of pipe fittings by the elastic pressing method.
In accordance with the invention this is achieved by creation of titanium-base alloy containing aluminum, vanadium, molybdenum, zirconium, iron, nitrogen and additional carbon at the following content of components, mass %:
Aluminum 2.5 - 4.0
Vanadium 2.5 - 4.0
Molybdenum 2.0 - 3.5
Zirconium 0.4 - 1.5
Iron 0.25 max
Nitrogen 0.03 max
Oxygen 0.15 max
Carbon 0.01 - 0,1
Other impurities, total 0.3 max
Titanium balance
This titanium-base alloy may also additionally contain palladium or ruthenium in the following quantities, mass %:
Palladium 0.03 - 0.1 Ruthenium 0.03 - 0.3
The lower limit of the alloying element content in mass %, i.e. Al(2.5), V(2.5), Mo(2.0), Zr(0.4), of interstitial impurities Fe(0.05), N(0.005), O(0.05) and of carbon (0.01) is the minimum at which the high strength (σβ = 690 MPa, σ0.2 = 530 MPa) and ductility (δ = 18.4%) are ensured when the pipe diameter is expanded by the factor of 1.43 in comparison with the initial outside diameter. The high ductility during cold rolling and expansion of the pipes is achieved due to higher content of the β-phase
which increases the plasticity as a result of large number of sliding planes in the crystal lattice and of the deformation of the α-phase within the β-phase under the isostatic compression.
The upper limit of the alloying element content in mass %, i.e. Al(4.0) and Zr(1.5), in combination with the maximum content of β-stabilizers V(4.0), Mo(3.5), interstitial impurities Fe(0.25), N(0.03), O(0.15), and carbon C(0.1) allows to maintain sufficient ductility (δ>17.7%) when the pipe diameter is expanded by the factor of 1.4 at high strength of the material (σ_. = 932 MPa, σ0 = 738 MPa).
Further increase in aluminum, zirconium and interstitial impurities content causes the increase in the α-phase quantity and strength but reduces the ductility. Increase in the β-stabilizer content reduces the alloy stability, causes grain growth during the heat treatment which also reduces the alloy ductility.
Addition of 0.01-0.1% of carbon increases the strength and ductility of the alloy and allows to use the same for manufacture of hydraulic system piping operating under severe conditions.
If the carbon content is below 0.01%, the yield point of the alloy is insufficient to ensure the performance capability of the piping in hydraulic systems. When the carbon content exceeds 0.1% the ductility of the alloy decreases at pipe expansion so that the pipe to fitting connection cannot be made by elastic pressing. Additional alloying with palladium and ruthenium in the claimed limits increases the corrosion resistance of the alloy in the marine environment when the alloy is used in sea vessel piping.
Overalloying with the additional elements Pd and Ru in excess of the claimed limits will increase the alloy cost without any significant increase in the corrosion resistance, and underalloying below these limits cannot ensure the required corrosion resistance for long-term operation in marine environment.
Examples of the embodiment of the invention are given below.
To study the properties of the alloy, ingots with the composition shown in Table 1 have been melted in a vacuum arc furnace and pipes with the outside diameter of 1" and wall thickness of 0.051" were made from these ingots.
The mechanical and corrosion properties of the pipes are shown in Table 2.
As can be seen, the alloy with the claimed composition possesses high strength and ductility values in combination with high expansion and corrosion resistance and complies with the requirements for pipes used in hydraulic systems of aerospace applications and sea vessels.
Table 1
Table 2
The outside diameter expansion was determined as the ratio of the outside diameter of the specimen after flaring to the initial outside diameter.
All specimens have sustained the test; the test was interrupted only because the support faces of the specimens lost the stability or the entire specimen lost the longitudinal stability.
Claims
1. Titanium-base alloy containing aluminum, vanadium, molybdenum, zirconium, iron, nitrogen, wherein it additionally contains carbon, at the following content of components, mass %:
Aluminum 2.5-4.0
Vanadium 2.5-4.0
Molybdenum 2.0-3.5
Zirconium 0.4-1.5
Iron 0.25 max
Nitrogen 0.03 max
Oxygen 0.15 max
Carbon 0.01 -0,1
Other impurities, total 0.3 max
Titanium Balance
2. Titanium-base alloy as claimed in claim 1 wherein it additionally contains palladium or ruthenium in the following quantities, mass %:
Palladium 0.03-0.1 Ruthenium 0.03-0.3
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2001112580/02A RU2203974C2 (en) | 2001-05-07 | 2001-05-07 | Titanium-based alloy |
| RU2001112580 | 2001-05-07 | ||
| PCT/RU2002/000227 WO2002090607A1 (en) | 2001-05-07 | 2002-05-07 | Titanium-base alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1392876A1 true EP1392876A1 (en) | 2004-03-03 |
| EP1392876B1 EP1392876B1 (en) | 2014-10-08 |
Family
ID=20249439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02739008.7A Expired - Lifetime EP1392876B1 (en) | 2001-05-07 | 2002-05-07 | Titanium-base alloy |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1392876B1 (en) |
| RU (1) | RU2203974C2 (en) |
| WO (1) | WO2002090607A1 (en) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040221929A1 (en) | 2003-05-09 | 2004-11-11 | Hebda John J. | Processing of titanium-aluminum-vanadium alloys and products made thereby |
| US7837812B2 (en) | 2004-05-21 | 2010-11-23 | Ati Properties, Inc. | Metastable beta-titanium alloys and methods of processing the same by direct aging |
| US10053758B2 (en) | 2010-01-22 | 2018-08-21 | Ati Properties Llc | Production of high strength titanium |
| RU2439183C2 (en) * | 2010-04-07 | 2012-01-10 | Федеральное государственное унитарное предприятие "Центральный научно-исследовательский институт конструкционных материалов "Прометей"(ФГУП "ЦНИИ КМ "Прометей") | Titanium-based alloy |
| RU2426808C1 (en) * | 2010-04-29 | 2011-08-20 | Федеральное Государственное Унитарное Предприятие "Центральный Научно-Исследовательский Институт Конструкционных Материалов "Прометей" (Фгуп "Цнии Км "Прометей") | Alloy on base of titanium |
| US9255316B2 (en) | 2010-07-19 | 2016-02-09 | Ati Properties, Inc. | Processing of α+β titanium alloys |
| US8499605B2 (en) | 2010-07-28 | 2013-08-06 | Ati Properties, Inc. | Hot stretch straightening of high strength α/β processed titanium |
| US8613818B2 (en) | 2010-09-15 | 2013-12-24 | Ati Properties, Inc. | Processing routes for titanium and titanium alloys |
| US9206497B2 (en) | 2010-09-15 | 2015-12-08 | Ati Properties, Inc. | Methods for processing titanium alloys |
| US10513755B2 (en) | 2010-09-23 | 2019-12-24 | Ati Properties Llc | High strength alpha/beta titanium alloy fasteners and fastener stock |
| US8652400B2 (en) | 2011-06-01 | 2014-02-18 | Ati Properties, Inc. | Thermo-mechanical processing of nickel-base alloys |
| RU2502819C1 (en) * | 2012-04-19 | 2013-12-27 | Федеральное Государственное Унитарное Предприятие "Центральный Научно-Исследовательский Институт Конструкционных Материалов "Прометей" (Фгуп "Цнии Км "Прометей") | Titanium-base alloy |
| US9050647B2 (en) | 2013-03-15 | 2015-06-09 | Ati Properties, Inc. | Split-pass open-die forging for hard-to-forge, strain-path sensitive titanium-base and nickel-base alloys |
| US9869003B2 (en) | 2013-02-26 | 2018-01-16 | Ati Properties Llc | Methods for processing alloys |
| US9192981B2 (en) | 2013-03-11 | 2015-11-24 | Ati Properties, Inc. | Thermomechanical processing of high strength non-magnetic corrosion resistant material |
| US9777361B2 (en) | 2013-03-15 | 2017-10-03 | Ati Properties Llc | Thermomechanical processing of alpha-beta titanium alloys |
| US11111552B2 (en) | 2013-11-12 | 2021-09-07 | Ati Properties Llc | Methods for processing metal alloys |
| RU2669959C2 (en) * | 2014-04-28 | 2018-10-17 | Рти Интернатионал Металс, Инк. | Titanium alloy, the parts, which are manufactured from it and method of its application |
| RU2583566C1 (en) * | 2014-12-24 | 2016-05-10 | Открытое Акционерное Общество "Корпорация Всмпо-Ависма" | METHOD FOR PRODUCING COLD-DEFORMED SEAMLESS PIPES MADE OF TITANIUM ALLOY Ti-3Al-2,5V |
| US10094003B2 (en) | 2015-01-12 | 2018-10-09 | Ati Properties Llc | Titanium alloy |
| RU2582171C1 (en) * | 2015-04-27 | 2016-04-20 | Федеральное Государственное Унитарное Предприятие "Центральный Научно-Исследовательский Институт Конструкционных Материалов "Прометей" (Фгуп "Цнии Км "Прометей") | Titanium-based alloy |
| US10502252B2 (en) | 2015-11-23 | 2019-12-10 | Ati Properties Llc | Processing of alpha-beta titanium alloys |
| RU2614229C1 (en) * | 2016-03-01 | 2017-03-23 | Федеральное Государственное Унитарное Предприятие "Центральный Научно-Исследовательский Институт Конструкционных Материалов "Прометей" (Фгуп "Цнии Км "Прометей") | Titanium-based alloy |
| CN108893632B (en) * | 2018-08-03 | 2020-11-17 | 燕山大学 | Tough corrosion-resistant titanium alloy and preparation method thereof |
| CN110592425B (en) * | 2019-09-02 | 2022-03-11 | 中国船舶重工集团公司第七二五研究所 | A kind of high impact toughness titanium alloy and method for preparing seamless pipe using titanium alloy |
| US12344918B2 (en) | 2023-07-12 | 2025-07-01 | Ati Properties Llc | Titanium alloys |
| GB202405730D0 (en) * | 2024-04-24 | 2024-06-05 | Rolls Royce Plc | Titanium alloy and method of manufacture |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5025418A (en) * | 1973-03-02 | 1975-03-18 | ||
| US5362441A (en) * | 1989-07-10 | 1994-11-08 | Nkk Corporation | Ti-Al-V-Mo-O alloys with an iron group element |
| JP2797913B2 (en) * | 1993-08-11 | 1998-09-17 | 住友金属工業株式会社 | High corrosion resistance titanium alloy with excellent cold workability and weldability |
| JP3083225B2 (en) * | 1993-12-01 | 2000-09-04 | オリエント時計株式会社 | Manufacturing method of titanium alloy decorative article and watch exterior part |
| JP2988246B2 (en) * | 1994-03-23 | 1999-12-13 | 日本鋼管株式会社 | Method for producing (α + β) type titanium alloy superplastic formed member |
| DE19533743A1 (en) * | 1995-09-12 | 1997-03-13 | Vladislav Prof Tetjuchine | Titanium alloy with high resistance to corrosion |
| US5980655A (en) * | 1997-04-10 | 1999-11-09 | Oremet-Wah Chang | Titanium-aluminum-vanadium alloys and products made therefrom |
| US6228189B1 (en) * | 1998-05-26 | 2001-05-08 | Kabushiki Kaisha Kobe Seiko Sho | α+β type titanium alloy, a titanium alloy strip, coil-rolling process of titanium alloy, and process for producing a cold-rolled titanium alloy strip |
| WO2001011095A1 (en) * | 1999-08-09 | 2001-02-15 | Otkrytoe Aktsionernoe Obschestvo Verkhnesaldinskoe Metallurgicheskoe Proizvodstvennoe Obiedinenie (Oao Vsmpo) | Titanium alloy |
-
2001
- 2001-05-07 RU RU2001112580/02A patent/RU2203974C2/en active
-
2002
- 2002-05-07 WO PCT/RU2002/000227 patent/WO2002090607A1/en not_active Ceased
- 2002-05-07 EP EP02739008.7A patent/EP1392876B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO02090607A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002090607A8 (en) | 2003-08-07 |
| WO2002090607A1 (en) | 2002-11-14 |
| EP1392876B1 (en) | 2014-10-08 |
| RU2203974C2 (en) | 2003-05-10 |
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