EP2218798B1 - Superalliages monocristallins hautement résistants et peu onéreux avec une teneur réduite en Re et en Ru - Google Patents

Superalliages monocristallins hautement résistants et peu onéreux avec une teneur réduite en Re et en Ru Download PDF

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EP2218798B1
EP2218798B1 EP09252708.4A EP09252708A EP2218798B1 EP 2218798 B1 EP2218798 B1 EP 2218798B1 EP 09252708 A EP09252708 A EP 09252708A EP 2218798 B1 EP2218798 B1 EP 2218798B1
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alloy
alloys
single crystal
bubble
pwa
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German (de)
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EP2218798A2 (fr
EP2218798A3 (fr
Inventor
Alan D. Cetel
Dilip M. Shah
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RTX Corp
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United Technologies Corp
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
    • C22C19/057—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being less 10%

Definitions

  • All second and higher generation nickel-base directionally solidified and single crystal superalloy compositions contain additions of rhenium of at least 3 wt% (for example see EP 1571297 and EP 1057899 ).
  • Fourth generation and higher single crystal alloys contain some percentage of the element ruthenium.
  • Nickel-base superalloy single crystals are primarily used for high temperature turbine components, such as blades and vanes, where temperature capability is typically assessed by its high temperature creep resistance. Simplistically, it is well understood that to improve creep resistance, additions of refractory elements with high melting point is desirable.
  • Such elements include almost all Group IVA to VIIIA transition metals, especially Ti, Nb, Ta, Mo, W, Re, and Ru with melting points in excess of 4082°F (2250°C).
  • Ti, Nb, and Ta are known to almost exclusively replace Al in the ordered precipitate phase ⁇ '(Ni 3 Al), whereas Re and Ru are known to exclusively partition to the nickel base solid solution ⁇ -matrix.
  • W is known to partition evenly between the ⁇ -matrix and ⁇ ' phase.
  • the concentration at which such phases will form can be approximately predicted by calculating, what is called an electron vacancy number or Nv number for the ⁇ -matrix. This calculation is based on a weighed average of Nv assigned to each element. It is an industry wide practice to use such calculations, but it is known that it is not completely accurate and there are exceptions to the rule.
  • the present invention can be seen to provide a lower cost high strength nickel based alloy that consists of 3.0 to 5.2 wt% chromium, from 1.5 to 3.0 wt% molybdenum, from 6.0 to 12.5 wt% tungsten, from 5.0 to 11 wt% tantalum, from 5.5 to 6.5 wt% aluminum, from 11 to 14 wt% cobalt, from 0.001 to 1.75 wt% rhenium, from 0.2 to 0.6 wt% hafnium, up to 0.05 wt% yttrium, up to 3.0 wt% ruthenium, and the balance nickel and unavoidable impurities.
  • the best known equiaxed and columnar grain alloys were based on Mar M200, which contain 12.5 weight% of W. Also the alloy contained 2.0 weight % Ti. Development of PWA 1480 was marked by the addition of 12 weight% Ta. Subsequent development of second generation single crystal alloys such as PWA 1484 all had a marked absence of Ti. An improved second generation DS alloy, PWA 1426, was developed with Re additions similar to PWA 1484.
  • the fourth generation of single crystal alloys such as PWA 1497 have an increase in Re concentration concurrent with Ru additions. As can be seen in Fig. 1 , these alloys do not overlap in the Ta, W, (Re + Ru) space. In these higher strength alloys, the concentration of Ta never decreased below 4 wt% and W never increased beyond 6.0 wt%.
  • FIGS. 1 and 2 Useful alloys are listed in Table I and are also depicted in FIGS. 1 and 2 .
  • Fig. 1 clearly depicts that in Ta weight % vs. W weight % plots, current production alloys are outside the alloy space.
  • the Ta in production alloys is showed by the diamond points 10 on FIG. 1 and the space with the Ta in the alloys set forth herein are shown by the squares in the space 12.
  • the same information is plotted in FIG. 2 as a bubble chart, where the size of plotting points is proportional to the concentration of (Re + Ru).
  • FIG. 1 clearly depicts that in Ta weight % vs. W weight % plots, current production alloys are outside the alloy space.
  • the Ta in production alloys is showed by the diamond points 10 on FIG. 1 and the space with the Ta in the alloys set forth herein are shown by the squares in the space 12.
  • the same information is plotted in FIG. 2 as a bubble chart, where the size of plotting points is proportional to the
  • bubble 20 is alloy PWA 1422
  • bubble 22 is alloy PWA 1480
  • bubble 24 is alloy PWA 1497
  • bubble 26 is alloy PWA 1484
  • bubble 28 is alloy 2a in Table I
  • bubble 30 is alloy 2b in Table I
  • bubble 32 is alloy 1a in Table I
  • bubble 34 is alloy 1b in Table I
  • bubble 36 is alloy 3a in Table I
  • bubble 38 is alloy 3b in Table I
  • bubble 40 is alloy 3c in Table I
  • bubble 42 is alloy PWA 1426
  • bubble 44 is alloy PWA 1426a
  • bubble 46 is alloy PWA 1426b.
  • Table I Listed in Table I are baseline compositions of the second and fourth generation single crystal alloys PWA 1484 and PWA 1497, respectively, and the second generation columnar grain (DS) alloy PWA 1426. It can be seen from FIG. 2 that using the useful alloys described herein, one can achieve the same level of creep resistance as PWA 1426, for reducing Re-containing alloys (PWA 1426a and PWA 1426b), by increasing the W content of these alloys.
  • One embodiment of a useful alloy contains from 3.0 to 5.2 wt% chromium, from 1.5 to 3.0 wt% molybdenum, from 6.0 to 12.5 wt% tungsten, from 5.0 to 11 wt% tantalum, from 5.5 to 6.5 wt% aluminum, from 11 to 14 wt% cobalt, from 0.001 to 1.75 wt% rhenium, from 0.2 to 0.6 wt% hafnium, up to 0.05 wt% yttrium, and the balance nickel.
  • Table II is a comparison of alloys having compositions within the aforesaid range with Rene N5.
  • the data shows the alloys described herein to have higher density, an equivalent or better life, better yield strength, and equivalent or better ultimate tensile strength than Rene N5.
  • a second embodiment of a useful alloy contains from 4.0 to 5.0 wt% chromium, from 1.7 to 2.3 wt% molybdenum, from 7.0 to 12.5 wt% tungsten, from 5.5 to 10 wt% tantalum, from 5.6 to 6.25 wt% aluminum, from 11.5 to 13.5 wt% cobalt, from 0.001 to 1.75 wt% rhenium, from 0.2 to 0.4 wt% hafnium, from 0.001 to 0.01 wt% yttrium, and the balance nickel.
  • a third embodiment of a useful alloy contains from 1.0 to 3.0 wt% chromium, up to 2.5 wt% molybdenum, from 11 to 16 wt% tungsten, from 4.0 to 8.0 tantalum, from 5.7 to 6.5 wt% aluminum, from 11 to 15 wt% cobalt, from 2.0 to 4.0 wt% rhenium, from 0.2 to 0.6 wt% hafnium, up to 0.05 wt% yttrium and the balance nickel.
  • a fourth embodiment of a useful alloy contains from 1.5 to 2.5 wt% chromium, from 0.5 to 1.5 wt% molybdenum, from 11.5 to 13.5 wt% tungsten, from 5.0 to 7.0 tantalum, from 5.8 to 6.25 wt% aluminum, from 11.5 to 13.5 wt% cobalt, from 2.5 to 3.5 wt% rhenium, from 0.2 to 0.4 wt% hafnium, from 0.001 to 0.01 wt% yttrium, and the balance nickel.
  • the above alloys may contain up to 3.0 wt% ruthenium.
  • the total rhenium and ruthenium content of each of the alloys may be no greater than 6.0 wt%.
  • Oxidation resistance can be maintained by the addition of at least 15 - 30 ppm yttrium or other equivalent active elements such as Ca, Mg, and other rare earth elements.
  • yttrium and other rare earth additions have not been added to alloys containing elevated levels of W, i.e. greater than 6.0 weight%.
  • the alloys described herein can fulfill the low cost requirements. Since Re and Ru raw material prices have risen in the last few years, reducing their concentration in new alloys by 50% or more (compared to existing second generation and higher alloys) will have a significant effect on master heat cost.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Claims (8)

  1. Alliage à base de nickel, constitué de :
    de 3,0 à 5,2 % en poids de chrome,
    de 1,5 à 3,0 % en poids de molybdène,
    de 6,0 à 12,5 % en poids de tungstène,
    de 5,0 à 11 % en poids de tantale,
    de 5,5 à 6,5 % en poids d'aluminium,
    de 11 à 14 % en poids de cobalt,
    jusqu'à 1,75 % en poids de rhénium,
    de 0,2 à 0,6 % en poids de hafnium,
    jusqu'à 0,05 % en poids d'yttrium,
    jusqu'à 3,0 % en poids de ruthénium, et
    le complément est du nickel et des impuretés inévitables.
  2. Alliage à base de nickel selon la revendication 1, dans lequel ledit chrome est présent à hauteur de 4,0 à 5,0 % en poids.
  3. Alliage à base de nickel selon la revendication 1 ou 2, dans lequel ledit molybdène est présent à hauteur de 1,7 à 2,3 % en poids.
  4. Alliage à base de nickel selon la revendication 1, 2 ou 3, dans lequel ledit tungstène est présent à hauteur de 7,0 à 12,0 % en poids.
  5. Alliage à base de nickel selon l'une quelconque des revendications précédentes, dans lequel ledit tantale est présent à hauteur de 5,5 à 10 % en poids.
  6. Alliage à base de nickel selon l'une quelconque des revendications précédentes, dans lequel ledit aluminium est présent à hauteur de 5,6 à 6,25 % en poids.
  7. Alliage à base de nickel selon l'une quelconque des revendications précédentes, dans lequel ledit cobalt est présent à hauteur de 11,5 à 13,5 % en poids.
  8. Alliage à base de nickel selon l'une quelconque des revendications précédentes, dans lequel ledit rhénium est présent à hauteur de 0,001 à 1,75 % en poids, ledit hafnium est présent à hauteur de 0,2 à 0,4 % en poids et ledit yttrium est présent à hauteur de 0,001 à 0,01 % en poids.
EP09252708.4A 2008-12-01 2009-12-01 Superalliages monocristallins hautement résistants et peu onéreux avec une teneur réduite en Re et en Ru Active EP2218798B1 (fr)

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EP16181107.0A EP3141623B1 (fr) 2008-12-01 2009-12-01 Superalliages monocristallins hautement résistants et à teneur réduite en re et en ru

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US11871408P 2008-12-01 2008-12-01

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EP16181107.0A Division-Into EP3141623B1 (fr) 2008-12-01 2009-12-01 Superalliages monocristallins hautement résistants et à teneur réduite en re et en ru

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EP2218798A2 EP2218798A2 (fr) 2010-08-18
EP2218798A3 EP2218798A3 (fr) 2011-11-23
EP2218798B1 true EP2218798B1 (fr) 2016-09-14

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EP09252708.4A Active EP2218798B1 (fr) 2008-12-01 2009-12-01 Superalliages monocristallins hautement résistants et peu onéreux avec une teneur réduite en Re et en Ru

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Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100254822A1 (en) * 2009-03-24 2010-10-07 Brian Thomas Hazel Super oxidation and cyclic damage resistant nickel-base superalloy and articles formed therefrom
US20110076179A1 (en) * 2009-03-24 2011-03-31 O'hara Kevin Swayne Super oxidation and cyclic damage resistant nickel-base superalloy and articles formed therefrom
US20110076181A1 (en) * 2009-09-30 2011-03-31 General Electric Company Nickel-Based Superalloys and Articles
US20110076180A1 (en) * 2009-09-30 2011-03-31 General Electric Company Nickel-Based Superalloys and Articles
ES2670877T3 (es) 2011-12-07 2018-06-01 Mtu Aero Engines Gmbh Superaleación a base de níquel exenta de renio o con contenido reducido de renio
US9551049B2 (en) 2012-08-28 2017-01-24 United Technologies Corporation High elastic modulus shafts and method of manufacture
EP2725110B1 (fr) * 2012-10-26 2017-05-03 MTU Aero Engines GmbH Superalliage à base de nickel sans rhénium résistant au fluage
US8858876B2 (en) 2012-10-31 2014-10-14 General Electric Company Nickel-based superalloy and articles
JP6730936B2 (ja) 2014-05-27 2020-08-05 クエステック イノベーションズ リミテッド ライアビリティ カンパニー 高度に加工性の単結晶性ニッケル合金
ES2682362T3 (es) 2015-05-05 2018-09-20 MTU Aero Engines AG Superaleación a base de níquel exenta de renio con baja densidad

Citations (13)

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Publication number Priority date Publication date Assignee Title
US4169742A (en) 1976-12-16 1979-10-02 General Electric Company Cast nickel-base alloy article
EP0150917A2 (fr) 1984-01-10 1985-08-07 AlliedSignal Inc. Alliage monocristallin à base de nickel
EP0362661A1 (fr) 1988-10-03 1990-04-11 General Electric Company Pièce creuse en alliage à base de nickel coulé comportant une structure de grains colonaire, alliage et procédé de sa fabrication
US4935072A (en) 1986-05-13 1990-06-19 Allied-Signal, Inc. Phase stable single crystal materials
EP1057899A2 (fr) 1999-05-26 2000-12-06 General Electric Company Compositions et articles monocristallines en superalliages de nickel, modifiés par hafnium et/ou zirconium
EP1184473A2 (fr) 2000-08-30 2002-03-06 Kabushiki Kaisha Toshiba Alliages monocristallins à base de nickel et méthode de fabriction et éléments d'un turbine à gaz à des hautes températures à partir de ceux-ci
US6419763B1 (en) 1999-05-20 2002-07-16 Alstom (Switzerland) Ltd Nickel-base superalloy
US20030041930A1 (en) 2001-08-30 2003-03-06 Deluca Daniel P. Modified advanced high strength single crystal superalloy composition
US20030075247A1 (en) 2001-05-30 2003-04-24 Yutaka Koizumi Ni-based single crystal super alloy
US20040229072A1 (en) 2002-12-16 2004-11-18 Murphy Kenneth S. Nickel base superalloy
EP1571297A2 (fr) 2004-03-02 2005-09-07 United Technologies Corporation Elément de turbine en métal avec module d' élasticité élevé pour opérations dans un champ vibrationnel élevé
CN1966750A (zh) 2005-11-18 2007-05-23 中国科学院金属研究所 一种低成本第三代镍基单晶高温合金
EP1930455A1 (fr) 2005-09-27 2008-06-11 National Institute for Materials Science Superalliage a base de nickel ne presentant pas de tendance a l' oxydation

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US6989174B2 (en) * 2004-03-16 2006-01-24 General Electric Company Method for aluminide coating a hollow article

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169742A (en) 1976-12-16 1979-10-02 General Electric Company Cast nickel-base alloy article
EP0150917A2 (fr) 1984-01-10 1985-08-07 AlliedSignal Inc. Alliage monocristallin à base de nickel
US4935072A (en) 1986-05-13 1990-06-19 Allied-Signal, Inc. Phase stable single crystal materials
EP0362661A1 (fr) 1988-10-03 1990-04-11 General Electric Company Pièce creuse en alliage à base de nickel coulé comportant une structure de grains colonaire, alliage et procédé de sa fabrication
US6419763B1 (en) 1999-05-20 2002-07-16 Alstom (Switzerland) Ltd Nickel-base superalloy
EP1057899A2 (fr) 1999-05-26 2000-12-06 General Electric Company Compositions et articles monocristallines en superalliages de nickel, modifiés par hafnium et/ou zirconium
EP1184473A2 (fr) 2000-08-30 2002-03-06 Kabushiki Kaisha Toshiba Alliages monocristallins à base de nickel et méthode de fabriction et éléments d'un turbine à gaz à des hautes températures à partir de ceux-ci
US20030075247A1 (en) 2001-05-30 2003-04-24 Yutaka Koizumi Ni-based single crystal super alloy
US20030041930A1 (en) 2001-08-30 2003-03-06 Deluca Daniel P. Modified advanced high strength single crystal superalloy composition
US20040229072A1 (en) 2002-12-16 2004-11-18 Murphy Kenneth S. Nickel base superalloy
EP1571297A2 (fr) 2004-03-02 2005-09-07 United Technologies Corporation Elément de turbine en métal avec module d' élasticité élevé pour opérations dans un champ vibrationnel élevé
EP1930455A1 (fr) 2005-09-27 2008-06-11 National Institute for Materials Science Superalliage a base de nickel ne presentant pas de tendance a l' oxydation
CN1966750A (zh) 2005-11-18 2007-05-23 中国科学院金属研究所 一种低成本第三代镍基单晶高温合金

Also Published As

Publication number Publication date
EP3141623B1 (fr) 2019-05-29
EP2218798A2 (fr) 2010-08-18
EP2218798A3 (fr) 2011-11-23
EP3141623A1 (fr) 2017-03-15
US20100135846A1 (en) 2010-06-03

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