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EP1851350B1 - Procede de moulage d'un alliage de titane - Google Patents

Procede de moulage d'un alliage de titane Download PDF

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Publication number
EP1851350B1
EP1851350B1 EP06707301A EP06707301A EP1851350B1 EP 1851350 B1 EP1851350 B1 EP 1851350B1 EP 06707301 A EP06707301 A EP 06707301A EP 06707301 A EP06707301 A EP 06707301A EP 1851350 B1 EP1851350 B1 EP 1851350B1
Authority
EP
European Patent Office
Prior art keywords
temperature
casting
alloy
titanium
process according
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.)
Not-in-force
Application number
EP06707301A
Other languages
German (de)
English (en)
Other versions
EP1851350A1 (fr
Inventor
Sevki Baliktay
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.)
Waldemar Link GmbH and Co KG
Original Assignee
Waldemar Link GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Waldemar Link GmbH and Co KG filed Critical Waldemar Link GmbH and Co KG
Priority to PL06707301T priority Critical patent/PL1851350T3/pl
Priority to EP06707301A priority patent/EP1851350B1/fr
Publication of EP1851350A1 publication Critical patent/EP1851350A1/fr
Application granted granted Critical
Publication of EP1851350B1 publication Critical patent/EP1851350B1/fr
Not-in-force legal-status Critical Current
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
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18—High-melting or refractory metals or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/005—Castings of light metals with high melting point, e.g. Be 1280 degrees C, Ti 1725 degrees C
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18—High-melting or refractory metals or alloys based thereon
    • C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon

Definitions

  • the invention relates to a method for casting objects from a ⁇ -titanium alloy, more particularly a titanium-molybdenum alloy.
  • Titanium alloys are becoming increasingly popular because of their many beneficial properties. In particular, because of their good chemical resistance, even at high temperature, and their low weight with excellent mechanical properties titanium alloys are used in all areas where high demands are placed on the material. Because of their excellent biocompatibility, titanium alloys are also preferably used in the medical field, in particular for implants and prostheses.
  • titanium alloys are forgings, so forging processes are mostly used. Because it has been shown that titanium alloys are difficult to pour. Usually this approach is taken in complicated shapes, but this approach leads to limitations in the selection of suitable alloys. In particular, it has been found that only unsatisfactory results are achieved when casting ⁇ -titanium alloys ( US-A-2004/0136859 ).
  • the invention has for its object to provide an improved casting method for ⁇ -titanium alloys, which allows a production of complex shapes with good material properties.
  • the alloy in a method for casting articles of a ⁇ -titanium alloy with a molybdenum content of 15%, the alloy is melted at a temperature above 1770 ° C., the molten alloy is finely poured into a casting mold corresponding to the article to be produced, and hot isostatic is pressed, is solution-annealed at a temperature of 760 ° C-800 ° C and then quenched.
  • the invention With the method according to the invention, a rational production of articles made of ⁇ -titanium alloys is achieved by precision casting.
  • the invention thus makes it possible to combine the advantageous properties of ⁇ -titanium alloys, in particular its excellent mechanical properties, with the advantages of producing articles by precision casting. Even objects with complex shapes, which could not be made or not made meaningful by conventional forging methods can be made thanks to the invention of a ⁇ -titanium alloy.
  • the invention also opens up the field of application of the complex shaped articles to the ⁇ -titanium alloys known for their excellent mechanical properties and biocompatibility.
  • the proportion of molybdenum in the alloy is 15%. This results in a sufficient stabilization of the ⁇ -phase up to the range of room temperature. This can be achieved by fast cooling after the investment casting a metastable ⁇ -phase.
  • the addition of other alloying agents is usually unnecessary. In particular, it is not necessary that vanadium or aluminum be added. The absence of this has the already mentioned advantage that the toxicity emanating from these alloy formers can be avoided.
  • bismuth which in terms of its biocompatibility likewise does not equal titanium.
  • a cold wall crucible vacuum induction plant is used to melt the ⁇ -titanium alloy.
  • the melting point of TiMo15 is 1770 ° C.
  • a surcharge of about 60 ° C is appropriate to achieve a safe investment casting.
  • a temperature of 1830 ° C for TiMo15 must be achieved.
  • the hot isostatic pressing is carried out at a temperature which is at most as high as a beta-transus temperature of the titanium-molybdenum alloy and at least 100 ° C below the beta-transus temperature.
  • Hot isostatic pressing counteracts unfavorable effects due to an accumulation of molybdenum in dendrites while depleting the residual melt by dissolving interdendritic precipitates.
  • Favorable is a temperature below the ⁇ -transus temperature, up to 100 ° C below.
  • temperatures in the range of 710 ° C. to 760 ° C., preferably of about 740 ° C., at an argon pressure of about 1100 to 1200 bar have proved successful.
  • temperatures of at least 700 ° C. to 880 ° C. (not according to the invention) have proven to be useful, preferably in the range of 800 ° C to 860 ° C (not inventive area).
  • Argon is preferably used to generate a protective gas atmosphere. This achieves an improvement in the ductility of the alloy.
  • quenching of the article by water occurs after solution heat treatment.
  • cold water is used.
  • cold is meant the temperature of unheated tap water. Quenching has been shown to exert a strong influence on the ultimate mechanical properties of the article. Alternatively, it can also be quenched in inert gas, for example by argon cooling. However, the results achieved remain behind those achieved with cold water.
  • the curing in a temperature range of about 600 ° C to about 700 ° C is done.
  • Starting material is a ⁇ -titanium alloy with a molybdenum content of 15% (TiMo15). This alloy can be purchased commercially in the form of small ingots.
  • an investment casting of the objects to be cast takes place.
  • a casting plant is planned.
  • it is a cold wall crucible vacuum induction melting and casting equipment.
  • the melting point of TiMo15 is 1770 ° C plus a surcharge of about 60 ° C for a safe investment casting. Overall, therefore, a temperature of 1830 ° C must be achieved.
  • the investment casting of the melt is then carried out by means of known methods, for example with wax cores and ceramic molds as a lost form. Such investment casting techniques are known for investment casting of TiA16V4.
  • the interdendritic zones have a molybdenum content of less than 15% in the cast structure, whereby the molybdenum content can drop to values of about 10%.
  • molybdenum depletion there is a lack of sufficient ⁇ -stabilizers in the interdendritic zones.
  • an increased a / ⁇ conversion temperature is established locally, causing the in Fig. 2 emerge to discernible excretions.
  • this layer has a thickness of about 0.03 mm.
  • the castings released from the casting molds after the investment casting are subjected to a heat treatment according to the invention.
  • a hot isostatic pressing is provided, namely at a temperature just below the ⁇ -transus temperature. It may range from 710 ° C to 760 ° C, preferably about 740 ° C.
  • the undesired precipitates in the interdendritic zones go into solution again.
  • An advance storage before or after the hipping is not required.
  • fine secondary phases separate again from, preferably in the original interdendritic zones (see Fig. 3 , 1000x magnification). This results in unwanted embrittlement of the material.
  • the articles have a low ductility after being tipped.
  • the castings are annealed in a chamber furnace under a protective gas atmosphere (eg argon).
  • a protective gas atmosphere eg argon
  • a temperature range of 760 ° C to 800 ° C is selected, with a duration of several, usually two hours. There is an opposite relationship between the temperature and the duration, at higher temperature is sufficient for a shorter time and vice versa.
  • the castings are quenched with cold water.
  • Fig. 4 1000x magnification
  • the structure is shown after the solution annealing.
  • the articles finely cast with the method according to the invention have, in their crystal structure, ⁇ grains with an average size of more than 0.3 mm. This size is typical of the crystal structure achieved by the process of the invention.
  • the modulus of elasticity decreases with increasing temperature during solution annealing, to values up to 60,000 N / mm 2 .
  • the toughness values improve with decreasing strength and hardness. So you reach after two hours solution annealing at 800 ° C, a modulus of elasticity of 60,000 N / mm 2 at an elongation at break of about 40% and a breaking strength Rm of about 730 N / mm 2 .

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  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Forging (AREA)
  • Powder Metallurgy (AREA)
  • Materials For Medical Uses (AREA)
  • Continuous Casting (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (6)

  1. Procédé de coulée d'objets d'un alliage de titane β dont la teneur en molybdène est de 15 %,
    caractérisé par les étapes suivantes :
    - fusion de l'alliage à une température supérieure à 1 770°C,
    - coulée fine de l'alliage en fusion dans un moule de coulée qui correspond à l'objet à fabriquer,
    - compression isostatique à chaud,
    - recuit de solubilisation à une température comprise entre 760°C et 800°C et
    - trempe finale.
  2. Procédé selon la revendication 1, caractérisé par l'utilisation d'une installation d'induction sous vide à creuset à paroi froide pour la fusion de l'alliage de titane β.
  3. Procédé selon les revendications 1 ou 2,
    caractérisé par l'exécution de la compression isostatique à chaud à une température maximale aussi élevée que la température de transition bêta de l'alliage de titane et de molybdène et minimale à 100°C en dessous de la température de transition bêta.
  4. Procédé selon l'une des revendications précédentes, caractérisé par une trempe de préférence à l'eau froide après le recuit de solubilisation.
  5. Procédé selon l'une des revendications précédentes, caractérisé par le durcissement final de l'objet.
  6. Procédé selon la revendication 5, caractérisé par l'exécution du durcissement à une température de 600°C à 700°C.
EP06707301A 2005-02-25 2006-02-27 Procede de moulage d'un alliage de titane Not-in-force EP1851350B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL06707301T PL1851350T3 (pl) 2005-02-25 2006-02-27 Sposób odlewania stopu tytanowego
EP06707301A EP1851350B1 (fr) 2005-02-25 2006-02-27 Procede de moulage d'un alliage de titane

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05004173A EP1696043A1 (fr) 2005-02-25 2005-02-25 Procédé de couler un alliage a base de titan
PCT/EP2006/001790 WO2006089790A1 (fr) 2005-02-25 2006-02-27 Procede de moulage d'un alliage de titane
EP06707301A EP1851350B1 (fr) 2005-02-25 2006-02-27 Procede de moulage d'un alliage de titane

Publications (2)

Publication Number Publication Date
EP1851350A1 EP1851350A1 (fr) 2007-11-07
EP1851350B1 true EP1851350B1 (fr) 2009-08-05

Family

ID=34933944

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05004173A Withdrawn EP1696043A1 (fr) 2005-02-25 2005-02-25 Procédé de couler un alliage a base de titan
EP06707301A Not-in-force EP1851350B1 (fr) 2005-02-25 2006-02-27 Procede de moulage d'un alliage de titane

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP05004173A Withdrawn EP1696043A1 (fr) 2005-02-25 2005-02-25 Procédé de couler un alliage a base de titan

Country Status (18)

Country Link
EP (2) EP1696043A1 (fr)
JP (1) JP5155668B2 (fr)
KR (1) KR101341298B1 (fr)
CN (1) CN100594248C (fr)
AR (1) AR052391A1 (fr)
AT (1) ATE438746T1 (fr)
AU (1) AU2006218029B2 (fr)
BR (1) BRPI0607832A2 (fr)
CA (1) CA2597248C (fr)
DE (1) DE502006004443D1 (fr)
DK (1) DK1851350T3 (fr)
ES (1) ES2328955T3 (fr)
MX (1) MX2007010366A (fr)
PL (1) PL1851350T3 (fr)
RU (1) RU2402626C2 (fr)
TW (1) TWI395821B (fr)
WO (1) WO2006089790A1 (fr)
ZA (1) ZA200707586B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102019401B (zh) * 2010-12-30 2012-05-23 哈尔滨工业大学 一种小型钛合金或钛铝合金复杂铸件的铸造成形方法
JP5885169B2 (ja) * 2011-02-23 2016-03-15 国立研究開発法人物質・材料研究機構 Ｔｉ−Ｍｏ合金とその製造方法
CN102294436B (zh) * 2011-09-19 2013-01-02 哈尔滨实钛新材料科技发展有限公司 一种钛合金及钛铝合金的低成本精密铸造方法
RU2492275C1 (ru) * 2012-01-11 2013-09-10 Открытое Акционерное Общество "Корпорация Всмпо-Ависма" Способ изготовления плит из двухфазных титановых сплавов
CN102978554A (zh) * 2012-11-13 2013-03-20 安徽春辉仪表线缆集团有限公司 一种旋塞阀的钛合金阀杆制备方法
CN104550949A (zh) * 2013-10-24 2015-04-29 中国科学院金属研究所 一种电子束快速成形Ti-6Al-4V三维金属零件的方法
CN105817608B (zh) * 2016-04-29 2019-01-18 南京宝泰特种材料股份有限公司 一种钛合金熔炼浇铸方法
CN111850346A (zh) * 2020-08-06 2020-10-30 西部金属材料股份有限公司 一种无需固溶时效处理的高强钛合金及其制备方法
KR20220122374A (ko) 2021-02-26 2022-09-02 창원대학교 산학협력단 티타늄 진공원심주조방법

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WO2005106056A2 (fr) * 2004-04-29 2005-11-10 Leibniz-Institut Für Festkörper- Und Werkstoffforschung Dresden E.V. Corps moules deformables a froid realises en alliages a base de titane et procede de fabrication

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JPS5217307A (en) * 1975-07-31 1977-02-09 Kobe Steel Ltd Process for heat treatment of beta-type titanium alloy
JPH0686638B2 (ja) * 1985-06-27 1994-11-02 三菱マテリアル株式会社 加工性の優れた高強度Ｔｉ合金材及びその製造方法
US4612066A (en) * 1985-07-25 1986-09-16 Lev Levin Method for refining microstructures of titanium alloy castings
US4857269A (en) * 1988-09-09 1989-08-15 Pfizer Hospital Products Group Inc. High strength, low modulus, ductile, biopcompatible titanium alloy
JP2541341B2 (ja) * 1990-05-15 1996-10-09 大同特殊鋼株式会社 Ｔｉ，Ｔｉ合金の精密鋳造方法および精密鋳造装置
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Also Published As

Publication number Publication date
BRPI0607832A2 (pt) 2009-06-13
WO2006089790A1 (fr) 2006-08-31
TWI395821B (zh) 2013-05-11
EP1696043A1 (fr) 2006-08-30
AR052391A1 (es) 2007-03-14
JP2008531288A (ja) 2008-08-14
DK1851350T3 (da) 2009-10-19
EP1851350A1 (fr) 2007-11-07
ES2328955T3 (es) 2009-11-19
CN100594248C (zh) 2010-03-17
AU2006218029B2 (en) 2011-07-21
CN101128609A (zh) 2008-02-20
JP5155668B2 (ja) 2013-03-06
RU2007135062A (ru) 2009-03-27
ZA200707586B (en) 2008-10-29
CA2597248C (fr) 2016-04-19
CA2597248A1 (fr) 2006-08-31
MX2007010366A (es) 2007-10-17
PL1851350T3 (pl) 2010-01-29
TW200643182A (en) 2006-12-16
RU2402626C2 (ru) 2010-10-27
KR20070105379A (ko) 2007-10-30
ATE438746T1 (de) 2009-08-15
DE502006004443D1 (de) 2009-09-17
KR101341298B1 (ko) 2013-12-12
AU2006218029A1 (en) 2006-08-31

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