WO2014017692A1 - Alliage à base de titane-aluminium à structure lamellaire comprenant une phase beta-gamma - Google Patents

Alliage à base de titane-aluminium à structure lamellaire comprenant une phase beta-gamma Download PDF

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Publication number
WO2014017692A1
WO2014017692A1 PCT/KR2012/006931 KR2012006931W WO2014017692A1 WO 2014017692 A1 WO2014017692 A1 WO 2014017692A1 KR 2012006931 W KR2012006931 W KR 2012006931W WO 2014017692 A1 WO2014017692 A1 WO 2014017692A1
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WIPO (PCT)
Prior art keywords
beta
titanium
aluminum alloy
present
gamma phase
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PCT/KR2012/006931
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English (en)
Korean (ko)
Inventor
김성웅
나영상
김승언
염종택
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한국기계연구원
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Priority to US14/410,455 priority Critical patent/US20150322549A1/en
Publication of WO2014017692A1 publication Critical patent/WO2014017692A1/fr

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    • 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
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting

Definitions

  • the present invention improves the mechanical properties by adding carbon (C) and silicon (Si), which are effective for grain refinement and creep resistance, to lower the content to suppress the formation of precipitates, and by adding niobium (Nb) to high temperature oxidation resistance and ductility. It relates to a layered titanium-aluminum alloy comprising a beta-gamma phase so that this can be improved.
  • Titanium-aluminum based alloy is a two-phase alloy containing about 10% of Ti 3 Al as an intermetallic compound that is drawing attention as a next-generation lightweight heat-resistant material.
  • TiAl's layered structure is known to provide useful properties for practical application of TiAl as a lightweight high temperature material because of its excellent fracture toughness, fatigue strength, and creep strength, but lack of ductility at room temperature is known as the biggest obstacle to use as a casting material. have.
  • An object of the present invention is to solve the above problems, and more specifically, inexpensive tungsten (W), chromium (Cr) instead of molybdenum (Mo) and vanadium (V) are generally added for the beta phase stabilization
  • the present invention provides a layered titanium-aluminum alloy including a beta-gamma phase, which is added to increase the beta phase stabilization effect and reduce manufacturing costs.
  • the layered titanium-aluminum alloy comprising a beta-gamma phase has 40 to 46 at% aluminum (Al), 3 to 6 at% niobium (Nb), and a creep tendency of 0.2 to 0.4 at%. It comprises a supernatant, 1 to 3 at% softening resistance improver and the balance titanium, characterized in that it is produced by the solidification casting method.
  • the creep enhancer is characterized in that it comprises at least one of carbon (C) and silicon (Si).
  • the softening resistance improving agent is characterized in that any one of tungsten (W) and chromium (Cr) is adopted.
  • Example 3 is a microstructure photograph of Example 1 of a titanium-aluminum alloy having a layered structure including a beta-gamma phase according to the present invention.
  • Example 4 is a microstructure photograph of Example 2 of a titanium-aluminum alloy having a layered structure including a beta-gamma phase according to the present invention.
  • Example 5 is a microstructure photograph of Example 3 of a titanium-aluminum alloy having a layered structure including a beta-gamma phase according to the present invention.
  • Example 7 is a table comparing the tensile strength of Example 2 and Example 3 and Comparative Example of the titanium-aluminum alloy of the layered structure including the beta-gamma phase according to the present invention.
  • Embodiments of the present invention can be classified into Examples 1 to 3.
  • Example 1 was prepared by changing the amount of aluminum (Al) and niobium (Nb) while maintaining a constant composition ratio of tungsten (W) and carbon (C),
  • Example 2 changes the amount of niobium (Nb)
  • Example 3 was prepared by changing the amount of aluminum (Al) and niobium (Nb) while maintaining the amount of chromium (Cr) silicon (Si), carbon (C) constant.
  • the creep enhancer comprises at least one of carbon (C) and silicon (Si)
  • the softening resistance improver is one of tungsten (W)
  • chromium (Cr) is adopted, It has an average hardness of at least 335.6 Hv and a Young's modulus of 180 to 220 kPa without any subsequent process of.
  • FIG. 3 to 5 are microstructure photographs of Examples 1 to 3 of the titanium-aluminum alloy having a layered structure including a beta-gamma phase according to the present invention
  • FIG. 6 is a microstructure photograph of a comparative example.
  • FIG. 3 shows that all of the layers were formed by adopting tungsten (W) as a softening resistance improver and adding carbon (C) as a creep enhancer.
  • FIG. 4 is also made of tungsten (W) as a softening resistance improver and silicon (Si) as a crease enhancer to form a layered structure.
  • chromium (Cr) as a softening resistance improver, and simultaneously produced by adding carbon (C) and silicon (Si) as a creep enhancer to form a layered structure.
  • the grain size is small, but the layered structure in the grains is not clearly seen, and a weak ⁇ 2 (Ti 3 Al) phase is distributed along the grain boundaries.
  • Figure 7 is a table comparing the tensile strength of Example 2 and Example 3 and Comparative Example of the layered titanium-aluminum alloy comprising a beta-gamma phase according to the present invention, the embodiment of the present invention is 453.8 MPa While having the above tensile strength, the comparative example showed a tensile strength of 384.5 MPa to confirm that the strength of the titanium-aluminum alloy according to the present invention is significantly higher.
  • Example 8 is a table comparing the Vickers hardness of Example 1 to Example 3 and Comparative Example of the layered titanium-aluminum alloy including the beta-gamma phase according to the present invention.
  • Vickers hardness was measured three times for each sample of Examples 1 to 3 of the present invention, and the average hardness was 335.6 Hv or more.
  • Example 9 is a graph showing the tensile test results of Example 2 and Example 3 and Comparative Example of the layered titanium-aluminum alloy including the beta-gamma phase according to the present invention.
  • the tensile test was performed on the # 11 of Example 3 and the comparative example, and a Young's modulus of 180 to 220 GPa was shown.
  • molybdenum (Mo) and vanadium (V), which are generally added for beta phase stabilization, are replaced with tungsten (W) and chromium (Cr), which are inexpensive elements.
  • carbon (C) and silicon (Si) are added to reduce the grain size, but the content is lowered to suppress the formation of precipitates, thereby improving mechanical properties and adding niobium (Nb) to improve high temperature oxidation resistance and strength. It is possible to produce a layered titanium-aluminum alloy having a beta-gamma phase.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)

Abstract

L'alliage de titane-aluminium à structure lamellaire comprenant une phase beta-gamma selon la présente invention comprend entre 40 et 46 % at. d'aluminium (Al), entre 3 et 6 % at. de niobium (Nb), entre 0,2 et 0,4 % at. d'un amplificateur de la propriété de fluage, 2 % at. d'un amplificateur anti-adoucissement et le complément est constitué de titane, et ledit alliage selon l'invention est produit par un procédé de fusion à l'arc sous vide.
PCT/KR2012/006931 2012-07-25 2012-08-30 Alliage à base de titane-aluminium à structure lamellaire comprenant une phase beta-gamma WO2014017692A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/410,455 US20150322549A1 (en) 2012-07-25 2012-08-30 Lamellar-structure titanium-aluminum based alloy having a beta-gamma phase

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120081170A KR101261885B1 (ko) 2012-07-25 2012-07-25 베타-감마상을 포함하는 층상 구조의 타이타늄-알루미늄계 합금
KR10-2012-0081170 2012-07-25

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WO2014017692A1 true WO2014017692A1 (fr) 2014-01-30

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US (1) US20150322549A1 (fr)
KR (1) KR101261885B1 (fr)
WO (1) WO2014017692A1 (fr)

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Publication number Priority date Publication date Assignee Title
KR101342169B1 (ko) 2013-05-20 2013-12-18 한국기계연구원 상온 연성을 갖는 타이타늄-알루미늄계 합금 잉곳
CN106868338A (zh) * 2015-12-10 2017-06-20 南京理工大学 一种取向增强的含钨高铌钛铝合金及其制备方法
KR102197604B1 (ko) * 2017-11-24 2021-01-05 한국재료연구원 고온 특성이 우수한 3d 프린팅용 타이타늄-알루미늄계 합금 및 이의 제조방법
CN108559872B (zh) * 2018-06-05 2020-06-30 中国航发北京航空材料研究院 一种TiAl合金及其制备方法
CN110527843B (zh) * 2019-09-25 2020-10-02 西北有色金属研究院 一种高铌钛合金均质铸锭的制备方法

Citations (4)

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Publication number Priority date Publication date Assignee Title
JPH06228685A (ja) * 1993-02-01 1994-08-16 Honda Motor Co Ltd 高強度高延性ＴｉＡｌ系金属間化合物およびその製造方法
US20040045644A1 (en) * 2000-05-17 2004-03-11 Volker Guther T-tial alloy-based component comprising areas having a graduated structure
KR20090063173A (ko) * 2007-12-13 2009-06-17 게카에스에스-포르슝스첸트룸 게스트하흐트 게엠베하 티타늄 알루미나이드 합금
KR20110117397A (ko) * 2010-04-21 2011-10-27 주식회사 엔아이비 티타늄-알루미늄계 금속간화합물 및 이의 제조방법

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5284620A (en) * 1990-12-11 1994-02-08 Howmet Corporation Investment casting a titanium aluminide article having net or near-net shape
US5653828A (en) * 1995-10-26 1997-08-05 National Research Council Of Canada Method to procuce fine-grained lamellar microstructures in gamma titanium aluminides

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06228685A (ja) * 1993-02-01 1994-08-16 Honda Motor Co Ltd 高強度高延性ＴｉＡｌ系金属間化合物およびその製造方法
US20040045644A1 (en) * 2000-05-17 2004-03-11 Volker Guther T-tial alloy-based component comprising areas having a graduated structure
KR20090063173A (ko) * 2007-12-13 2009-06-17 게카에스에스-포르슝스첸트룸 게스트하흐트 게엠베하 티타늄 알루미나이드 합금
KR20110117397A (ko) * 2010-04-21 2011-10-27 주식회사 엔아이비 티타늄-알루미늄계 금속간화합물 및 이의 제조방법

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KR101261885B1 (ko) 2013-05-06

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