EP3141623B1 - Kostengünstige hochfeste einzelkristall-superlegierungen mit verringertem re- und ru-gehalt - Google Patents

Kostengünstige hochfeste einzelkristall-superlegierungen mit verringertem re- und ru-gehalt Download PDF

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Publication number
EP3141623B1
EP3141623B1 EP16181107.0A EP16181107A EP3141623B1 EP 3141623 B1 EP3141623 B1 EP 3141623B1 EP 16181107 A EP16181107 A EP 16181107A EP 3141623 B1 EP3141623 B1 EP 3141623B1
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Prior art keywords
pwa
alloy
alloys
single crystal
bubble
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English (en)
French (fr)
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EP3141623A1 (de
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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%.
  • 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.
  • EP 1057899 A2 discloses compositions and single-crystal articles of hafnium-modified and/or zirconium modified nickel-based alloys.
  • the present invention can be seen to provide a lower cost high strength nickel based alloy broadly comprising 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, up to 3.0 wt% ruthenium, and the balance nickel.
  • 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%.
  • Re is also thought to reduce the coarsening rate of the ⁇ ' phase, contributing to improving creep strength.
  • 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 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 second 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 (6)

  1. Nickelbasierte Legierung, die aus Folgendem besteht: von 1,0 bis 3,0 Gew.-% Chrom, bis zu 2,5 Gew.-% Molybdän, von 11 bis 16 Gew.-% Wolfram, von 4,0 bis 8,0 Gew.-% Tantal, von 5,7 bis 6,5 Gew.-% Aluminium, von 11 bis 15 Gew.-% Kobalt, von 2,0 bis 4,0 Gew.-% Rhenium, von 0,2 bis 0,6 Gew.-% Hafnium, bis zu 0,05 Gew.-% Yttrium, bis zu 3,0 Gew.-% Ruthenium und dem Rest Nickel.
  2. Nickelbasierte Legierung nach Anspruch 1, wobei das Chrom in einer Menge von 1,5 bis 2,5 Gew.-% und das Molybdän in einer Menge von 0,5 bis 1,5 Gew.-% vorliegt.
  3. Nickelbasierte Legierung nach Anspruch 1 oder 2, wobei das Wolfram in einer Menge von 11,5 bis 13,5 Gew.-% vorliegt.
  4. Nickelbasierte Legierung nach Anspruch 1, 2 oder 3, wobei das Tantal in einer Menge von 5,0 bis 7,0 Gew.-%, das Aluminium in einer Menge von 5,8 bis 6,25 Gew.-% und das Kobalt in einer Menge von 11,5 bis 13,5 Gew.-% vorliegt.
  5. Nickelbasierte Legierung nach einem der Ansprüche 1 bis 4, wobei das Rhenium in einer Menge von 2,5 bis 3,5 Gew.-%, das Hafnium in einer Menge von 0,2 bis 0,4 Gew.-% und das Yttrium in einer Menge von 0,001 bis 0,01 Gew.-% vorliegt.
  6. Nickelbasierte Legierung nach einem der Ansprüche 1 bis 5, wobei der Gesamthalt von Ruthenium und Rhenium nicht größer als 6,0 Gew.-% ist.
EP16181107.0A 2008-12-01 2009-12-01 Kostengünstige hochfeste einzelkristall-superlegierungen mit verringertem re- und ru-gehalt Active EP3141623B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11871408P 2008-12-01 2008-12-01
EP09252708.4A EP2218798B1 (de) 2008-12-01 2009-12-01 Kostengünstigere hochfeste Einzelkristall-Superlegierungen mit reduziertem Re- und Ru-Gehalt

Related Parent Applications (2)

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EP09252708.4A Division EP2218798B1 (de) 2008-12-01 2009-12-01 Kostengünstigere hochfeste Einzelkristall-Superlegierungen mit reduziertem Re- und Ru-Gehalt
EP09252708.4A Division-Into EP2218798B1 (de) 2008-12-01 2009-12-01 Kostengünstigere hochfeste Einzelkristall-Superlegierungen mit reduziertem Re- und Ru-Gehalt

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EP3141623A1 EP3141623A1 (de) 2017-03-15
EP3141623B1 true EP3141623B1 (de) 2019-05-29

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EP16181107.0A Active EP3141623B1 (de) 2008-12-01 2009-12-01 Kostengünstige hochfeste einzelkristall-superlegierungen mit verringertem re- und ru-gehalt
EP09252708.4A Active EP2218798B1 (de) 2008-12-01 2009-12-01 Kostengünstigere hochfeste Einzelkristall-Superlegierungen mit reduziertem Re- und Ru-Gehalt

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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
US20110076180A1 (en) * 2009-09-30 2011-03-31 General Electric Company Nickel-Based Superalloys and Articles
US20110076181A1 (en) * 2009-09-30 2011-03-31 General Electric Company Nickel-Based Superalloys and Articles
US9850765B2 (en) 2011-12-07 2017-12-26 MTU Aero Engines AG Rhenium-free or rhenium-reduced nickel-base superalloy
US9551049B2 (en) 2012-08-28 2017-01-24 United Technologies Corporation High elastic modulus shafts and method of manufacture
ES2625825T3 (es) * 2012-10-26 2017-07-20 MTU Aero Engines AG Súper-aleación a base de níquel exenta de renio y resistente a la fluencia
US8858876B2 (en) 2012-10-31 2014-10-14 General Electric Company Nickel-based superalloy and articles
WO2015183955A2 (en) 2014-05-27 2015-12-03 Questek Innovations Llc Highly processable single crystal nickel alloys
ES2682362T3 (es) 2015-05-05 2018-09-20 MTU Aero Engines AG Superaleación a base de níquel exenta de renio con baja densidad

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US4169742A (en) 1976-12-16 1979-10-02 General Electric Company Cast nickel-base alloy article
US4765850A (en) 1984-01-10 1988-08-23 Allied-Signal Inc. Single crystal nickel-base super alloy
CA1315572C (en) 1986-05-13 1993-04-06 Xuan Nguyen-Dinh Phase stable single crystal materials
AU630623B2 (en) * 1988-10-03 1992-11-05 General Electric Company An improved article and alloy therefor
DE59904846D1 (de) 1999-05-20 2003-05-08 Alstom Switzerland Ltd Nickel-Basis-Superlegierung
US6444057B1 (en) * 1999-05-26 2002-09-03 General Electric Company Compositions and single-crystal articles of hafnium-modified and/or zirconium-modified nickel-base superalloys
EP1184473B1 (de) * 2000-08-30 2005-01-05 Kabushiki Kaisha Toshiba Monokristalline Nickel-Basis-Legierungen und Verfahren zur Herstellung und daraus hergestellte Hochtemperaturbauteile einer Gasturbine
JP3840555B2 (ja) 2001-05-30 2006-11-01 独立行政法人物質・材料研究機構 Ｎｉ基単結晶超合金
US20030041930A1 (en) 2001-08-30 2003-03-06 Deluca Daniel P. Modified advanced high strength single crystal superalloy composition
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US7338259B2 (en) * 2004-03-02 2008-03-04 United Technologies Corporation High modulus metallic component for high vibratory operation
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Publication number Publication date
US20100135846A1 (en) 2010-06-03
EP3141623A1 (de) 2017-03-15
EP2218798A2 (de) 2010-08-18
EP2218798B1 (de) 2016-09-14
EP2218798A3 (de) 2011-11-23

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