EP1449929B1 - Alliage metastable de beta-titane - Google Patents

Alliage metastable de beta-titane Download PDF

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Publication number
EP1449929B1
EP1449929B1 EP02783880A EP02783880A EP1449929B1 EP 1449929 B1 EP1449929 B1 EP 1449929B1 EP 02783880 A EP02783880 A EP 02783880A EP 02783880 A EP02783880 A EP 02783880A EP 1449929 B1 EP1449929 B1 EP 1449929B1
Authority
EP
European Patent Office
Prior art keywords
alloy
titanium alloy
ductility
balance
iron
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.)
Expired - Lifetime
Application number
EP02783880A
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German (de)
English (en)
Other versions
EP1449929A4 (fr
EP1449929A1 (fr
Inventor
Vladislav Valentinovich Tetyukhin
Igor Vasilievich Levin
Denis Valeryevich Sosnovsky
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VSMPO Avisma Corp PSC
Original Assignee
VSMPO Avisma Corp PSC
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Filing date
Publication date
Application filed by VSMPO Avisma Corp PSC filed Critical VSMPO Avisma Corp PSC
Publication of EP1449929A1 publication Critical patent/EP1449929A1/fr
Publication of EP1449929A4 publication Critical patent/EP1449929A4/fr
Application granted granted Critical
Publication of EP1449929B1 publication Critical patent/EP1449929B1/fr
Anticipated expiration legal-status Critical
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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

  • This invention relates to the non-ferrous metallurgy, and more particularly to the development of new titanium-base alloys combining high strength and ductility properties using relatively low-cost alloying elements.
  • the alloys of this invention can be applied in a wide range of products especially fasteners and different coil springs.
  • One of the known titanium alloys is the alloy containing (mass %): 2-6 Al; 6-9 Mo; 1-3 V; 0.5-2 Cr; 0-1.5 Fe; Ti balance.
  • Ref USSR Inventor's Certificate No. 180351, Class C22C 14/00, 1966.
  • this alloy has insufficient ductility due to the high content of Al and the presence of Cr. Besides this alloy is rather expensive.
  • the other known titanium alloy contains (mass %): 4-6.3 Al; 4.5-5.9 V; 4.5-5.9 Mo; 2.0-3.6 Cr; 0.2-0.5 Fe; Ti balance.
  • Ref RF Patent No. 2169204, Class C22C 14/00, published 2001.
  • the said alloy as-heat treated has high strength properties in heavy section forgings, but its ductility is insufficient and so the alloy cannot be used for production of such parts as coil springs.
  • the alloy most close to the claimed invention is the metastable ⁇ -titanium alloy containing (mass %): 4-5 Fe; 4-7 Mo; 1-2 Al; O 2 up to 0.25; Ti balance.
  • Ref US Patent No. 5,294,267, Class C22C 14/00, published 1994. This alloy will be the prototype.
  • US patent No. 3,615,378 discloses a high-strength metastable beta-titanium alloy with good ductility, which contains one of Fe, Mn, Cr and Co as the beta-eutecnoid elements and a V-content of 4-9 atomic %.
  • This alloy has high machinability, demands relatively low costs and is widely used for production of coil cylindrical springs in automotive industry.
  • said alloy has low especially elongation, which reduces the application of this alloy and is of importance during manufacture of some types of coil springs and fastener components.
  • the object of this invention is to provide a titanium alloy with combination of high ductility and strength properties in a heat treated condition, which can be produced using low cost alloying elements.
  • this alloy has higher content of aluminum than the prototype.
  • the content of aluminum of less than 3.5% does not significantly influence on the alloy ductility.
  • the contents of aluminum greater than 3.5% and iron greater than 3.8% increases the ⁇ -phase quantity, causes hardening and reduces ductility lower than desired.
  • the lower content of iron ( ⁇ 4%) than in the prototype ensures greater phase stability during thermal cycles (deformation and heat treatment).
  • the desired strength properties cannot be achieved with aluminum below 1.5%.
  • the content of molybdenum below 4.5% and iron below 1.5% reduces ⁇ -phase quantity and does not allow to achieve high strength of the as-heat treated alloy.
  • Molybdenum is added as ferromolybdenum with 55-75% of molybdenum and iron balance.
  • Vanadium is added as ferrovanadium with 65-85 % of vanadium and iron balance or Ti-Al-V system scrap.
  • ingots with the composition shown in Table 1 were melted in a vacuum arc furnace and 20 mm diameter bars were made from these ingots.
  • the bars were heat treated under the following conditions: heating to temperature of 30 °C below beta transus temperature, water cooling, heating to 480 °C for 8 hours, air cooling. Then tensile specimens were tested according to ASTM E 8. Mechanical properties of the produced bars from the evaluated alloys are shown in Table 2.
  • the claimed metastable ⁇ -titanium alloy as compared to the known alloys has the specified optimal combination of beta and alpha stabilizing alloying elements, which ensure high strength and ductility of the as-heat treated alloy. It is low cost and can be used for production of a wide range of critical parts, especially fastener components and different coil springs.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Springs (AREA)
  • Heat Treatment Of Articles (AREA)
  • Forging (AREA)
  • Ceramic Products (AREA)

Claims (1)

  1. Alliage métastable de β-titane contenant de l'aluminium, du molybdène et du fer, ledit alliage contenant en outre du vanadium, avec la teneur en composants suivante (% en masse) : Aluminium 1,5-3,5 Molybdène 4,5-8,0 Vanadium 1,0-3,5 Fer 1,5-3,8 Titane restant
EP02783880A 2001-11-22 2002-11-18 Alliage metastable de beta-titane Expired - Lifetime EP1449929B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
RU2001131383 2001-11-22
RU2001131383/02A RU2211873C2 (ru) 2001-11-22 2001-11-22 МЕТАСТАБИЛЬНЫЙ β-ТИТАНОВЫЙ СПЛАВ
PCT/RU2002/000502 WO2003044234A1 (fr) 2001-11-22 2002-11-18 Alliage metastable de $g(b)-titane

Publications (3)

Publication Number Publication Date
EP1449929A1 EP1449929A1 (fr) 2004-08-25
EP1449929A4 EP1449929A4 (fr) 2005-02-02
EP1449929B1 true EP1449929B1 (fr) 2006-05-17

Family

ID=20254397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02783880A Expired - Lifetime EP1449929B1 (fr) 2001-11-22 2002-11-18 Alliage metastable de beta-titane

Country Status (9)

Country Link
US (2) US20060039819A1 (fr)
EP (1) EP1449929B1 (fr)
AT (1) ATE326554T1 (fr)
DE (1) DE60211548T2 (fr)
DK (1) DK1449929T3 (fr)
ES (1) ES2261754T3 (fr)
HK (1) HK1066832A1 (fr)
RU (1) RU2211873C2 (fr)
WO (1) WO2003044234A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005052918A1 (de) * 2005-11-03 2007-05-16 Hempel Robert P Kaltverformbare Ti-Legierung
RU2425164C1 (ru) * 2010-01-20 2011-07-27 Открытое Акционерное Общество "Корпорация Всмпо-Ависма" Вторичный титановый сплав и способ его изготовления
CN102586639A (zh) * 2012-03-16 2012-07-18 广州有色金属研究院 一种高速压制成形制备钛合金的方法
GB201701251D0 (en) * 2017-01-25 2017-03-08 Univ Oxford Innovation Ltd A titanium-based alloy

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU180351A1 (ru) * 1965-01-06 1966-03-21 Сплав на основе титана
US3615378A (en) * 1968-10-02 1971-10-26 Reactive Metals Inc Metastable beta titanium-base alloy
GB1333729A (en) * 1970-10-23 1973-10-17 Lockheed Aircraft Corp Titanium base alloy
DE3425055C1 (de) * 1984-07-07 1985-07-25 Daimler-Benz Ag, 7000 Stuttgart Getterstoff
JP2737498B2 (ja) * 1991-12-24 1998-04-08 日本鋼管株式会社 高密度粉末焼結用チタン合金
JP2803455B2 (ja) * 1992-04-15 1998-09-24 日本鋼管株式会社 高密度粉末焼結チタン合金の製造方法
US5294267A (en) * 1992-12-04 1994-03-15 Titanium Metals Corporation Metastable beta titanium-base alloy
US5980655A (en) * 1997-04-10 1999-11-09 Oremet-Wah Chang Titanium-aluminum-vanadium alloys and products made therefrom
US5855697A (en) * 1997-05-21 1999-01-05 Imra America, Inc. Magnesium alloy having superior elevated-temperature properties and die castability
RU2169204C1 (ru) * 2000-07-19 2001-06-20 ОАО Верхнесалдинское металлургическое производственное объединение Сплав на основе титана и способ термической обработки крупногабаритных полуфабрикатов из этого сплава
RU2269584C1 (ru) * 2004-07-30 2006-02-10 Открытое Акционерное Общество "Корпорация Всмпо-Ависма" Сплав на основе титана
US20060045789A1 (en) * 2004-09-02 2006-03-02 Coastcast Corporation High strength low cost titanium and method for making same

Also Published As

Publication number Publication date
WO2003044234A1 (fr) 2003-05-30
EP1449929A4 (fr) 2005-02-02
EP1449929A1 (fr) 2004-08-25
HK1066832A1 (en) 2005-04-01
DE60211548T2 (de) 2006-09-14
RU2211873C2 (ru) 2003-09-10
DE60211548D1 (de) 2006-06-22
ES2261754T3 (es) 2006-11-16
US20080199350A1 (en) 2008-08-21
US20060039819A1 (en) 2006-02-23
DK1449929T3 (da) 2006-06-12
ATE326554T1 (de) 2006-06-15

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