WO2008108688A1 - Composition d'un alliage à base de nickel résistant à la chaleur pour coulée monocristalline (et variantes) - Google Patents

Composition d'un alliage à base de nickel résistant à la chaleur pour coulée monocristalline (et variantes) Download PDF

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Publication number
WO2008108688A1
WO2008108688A1 PCT/RU2008/000129 RU2008000129W WO2008108688A1 WO 2008108688 A1 WO2008108688 A1 WO 2008108688A1 RU 2008000129 W RU2008000129 W RU 2008000129W WO 2008108688 A1 WO2008108688 A1 WO 2008108688A1
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WO
WIPO (PCT)
Prior art keywords
nickel
alloy
heat
tungsten
tantalum
Prior art date
Application number
PCT/RU2008/000129
Other languages
English (en)
Russian (ru)
Inventor
Yrii Sergeevich Eliseev
Igor Mikhailovich Razumovskii
Valerii Aleksandrovich Poklad
Olga Gennadievna Ospennikova
Valentin Nikolaevich Larionov
Aleksandr Vyacheslavovich Logunov
Original Assignee
Federalnoe Gosudarstvennoe Unitarnoe Predpriyatie 'moskovskoe Mashinostroitelnoe Proizvodstvennoe Predpriyatie 'salut'
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 Federalnoe Gosudarstvennoe Unitarnoe Predpriyatie 'moskovskoe Mashinostroitelnoe Proizvodstvennoe Predpriyatie 'salut' filed Critical Federalnoe Gosudarstvennoe Unitarnoe Predpriyatie 'moskovskoe Mashinostroitelnoe Proizvodstvennoe Predpriyatie 'salut'
Publication of WO2008108688A1 publication Critical patent/WO2008108688A1/fr

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Classifications

    • 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

  • the invention relates to metallurgy of alloys, namely to the production of nickel-based alloys used for parts with a single crystal structure, for example, turbine blades operating at high temperatures.
  • the technical result, to which the claimed invention is directed, is to increase the heat resistance of nickel alloys for single crystal casting, for example, gas turbine engine blades.
  • the heat-resistant nickel alloy contains chromium, aluminum, tungsten, tantalum, cobalt, yttrium, cerium, lanthanum and nickel in the following ratio of components (wt.%): Chromium - 0.5-4.0 aluminum - 4 , 0-7.0 tungsten - 12.0-16.0 tantalum - 3.0-12.0 cobalt - 4.0-9.0 yttrium - 0.003-0.1 lanthanum - 0.001 - 0.1 cerium - 0.003 - 0.1 nickel - the rest is up to 100%.
  • the technical result to which the claimed invention is directed according to the second embodiment is to increase the heat resistance of nickel alloys for single crystal casting, for example, gas turbine engine blades, improve the casting properties of the alloy, its technological plasticity and increase the corrosion resistance of the claimed alloy.
  • the specified technical result is achieved in that the heat-resistant nickel alloy containing chromium, aluminum, titanium, molybdenum, tungsten, tantalum, cobalt, niobium, yttrium, lanthanum, cerium and nickel, additionally contains carbon, in the following ratio (wt.%): Chromium - 0.5-4.0
  • SUBSTITUTE SHEET (RULE 26) aluminum - 4.0-7.0 titanium ⁇ 2.0 molybdenum ⁇ 4.0 tungsten - 12.0-16.0 tantalum - 3.0-12.0 cobalt 4.0-9.0 niobium ⁇ 2.0 yttrium - 0.003 - 0.1 lanthanum - 0.001 - 0.1 cerium - 0.003-0.1 carbon ⁇ 0, 1 nickel - the rest is up to 100%.
  • SUBSTITUTE SHEET (RULE 26) The authors analyzed the alloying system of heat-resistant nickel alloys in terms of the binding energy (cohesion energy) of the alloying elements. Considering the binding energy of elements as a fundamental parameter that determines the level of mechanical properties and operational characteristics of the material, the distribution of alloying elements of heat-resistant alloys by the values of binding energy for a generalized alloying system of nickel heat-resistant alloys: Ni, Co, Cr, V, Ti, Al, Ru, Mo, Nb, Zr, Hf, Ta, W, Re, Os, Ir.
  • SUBSTITUTE SHEET (RULE 26) the highest possible level when its maximum content is limited by the solubility of tungsten in the nickel alloy. It should be borne in mind that tungsten or rhenium substitution with tungsten is impractical, since the cohesive strength of the alloy will not increase with such a replacement.
  • the next element for alloying nickel heat-resistant alloys is tantalum. It is advisable to introduce tantalum into heat-resistant alloys against the background of a high tungsten content, controlling the possibility of the release of Ta-containing intermediate phases in the alloy.
  • a feature of the inventive alloy according to the first embodiment is a high tungsten content in the range from 12.0 to 16.0 wt.%.
  • the upper limit of the tungsten content limits the concentration range, beyond which increases the likelihood of tungsten precipitation from the solid solution in the form of an ⁇ -phase, which is not
  • SUBSTITUTE SHEET (RULE 26) by such an effective hardener as the ⁇ '-phase based on Ni ⁇ l, and when the tungsten content is below 12 wt.%, its stabilizing effect on the structure and a favorable effect on heat resistance are weakened.
  • the claimed amount of tantalum is introduced into the composition of the heat-resistant nickel alloy against the background of a high tungsten content.
  • the alloying system of the inventive alloy (KC-I) is balanced in such a way that the ⁇ -phase is not released in the alloy despite the fact that tantalum, like tungsten, has a bcc lattice.
  • the effect of tantalum on the properties of the claimed alloy is largely similar to the effect of tungsten, tantalum is also characterized by high cohesive strength, which is also characteristic of the alloy, claimed in a given ratio of components. Tantalum is distributed between the ⁇ -matrix and the hardening ⁇ '-phase, stabilizing and strengthening both main phases of the heat-resistant alloy.
  • the introduction of the inventive composition of the heat-resistant alloy of the claimed amount of chromium is due to the need to increase its heat resistance. With an increase in the chromium content above 4 wt.%, The probability of the formation of a topologically close packed (TPU) phase based on chromium increases, which embrittle the alloy.
  • TPU topologically close packed
  • the alloying of the alloy with cobalt in the claimed amounts is due to the need to improve the technological characteristics of the alloy - technological plasticity and casting properties, as well as corrosion resistance.
  • SUBSTITUTE SHEET (RULE 26)
  • the system of microalloying additives namely the combined use of lanthanum, yttrium and cerium in the claimed amounts provides stabilization of structural defects in the single crystals of the inventive alloy, and together with other components of the alloy composition provides increased heat resistance compared to the prototype.
  • a feature of the inventive alloy in the second embodiment is the similarity of the effects of tungsten, tantalum, cobalt and a system of microalloying additives (yttrium, lanthanum and cerium), but besides this, the properties of the inventive alloy in the second embodiment are affected by the presence of titanium, molybdenum, niobium and carbon in its composition.
  • Aluminum and titanium are the main ⁇ 'forming elements, the amount of which on the one hand ensures the formation of the necessary content of the strengthening ⁇ ' phase, and on the other hand, limits the volume of excess eutectic ( ⁇ '+ ⁇ ) and contributes to an increase in the corrosion resistance of the alloy.
  • Niobium and molybdenum - provide increased material durability in the temperature range of ⁇ 1000 0 C. Carbon is introduced into the alloy to form the second hardening phase of heat-resistant alloys - carbides. The total content in the inventive alloy of carbon and carbide-forming elements ensures the absence of embrittlement TPU phases.
  • the inventive composition of heat-resistant nickel alloy according to the second option in quantitative and qualitative composition provides, along with increased heat resistance, improved casting properties of the alloy and its technological ductility and increased corrosion resistance.
  • Embodiments of the invention SUBSTITUTE SHEET (RULE 26)
  • alloys were cast according to the first and second variants. Alloy casting was carried out in a Kristall vacuum induction furnace with a capacity of 5-10 kg.
  • the order of introduction of the components of the claimed alloy compositions is standard: nickel, chromium, cobalt, tungsten, molybdenum, tantalum, carbon, melting, carbon deoxidation, the subsequent introduction of titanium, aluminum and microalloying additives (elements with high oxygen activity) and casting.
  • T 900 ° C
  • ⁇ yo 467 MPa
  • ⁇ 500 371 MPa
  • T 900 ° C
  • ⁇ yo 440 MPa
  • ⁇ soo 35OMPa
  • T 900 ° C
  • ⁇ yo 471 MPa
  • ⁇ 5 ⁇ o 379 MPa
  • test results show that, compared with the prototype of the inventive alloys according to the first and second options ensure the achievement of the claimed technical result.

Landscapes

  • 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)

Abstract

L'invention concerne la métallurgie, notamment la fabrication d'alliages à base de nickel utilisés pour des pièces à structure monocristalline telles que des aubes de turbines à gaz fonctionnant à des températures élevées. Dans un premier mode de réalisation, l'alliage de l'invention est caractérisé par une résistance à la chaleur élevée et comprend, en % en masse : 0,5-4,0 de chrome, 4,0-7,0 d'aluminium, 12,0-16,0 de tungstène, 3,0-12,0 de tantale, 4,0-9,0 de cobalt, 0,003-0,1 d'yttrium, 0,001-0,1 de lanthane, 0,003-0,1 de cérium, le reste étant du nickel. Dans un deuxième mode de réalisation, l'alliage possède une résistance à la chaleur plus élevée, une coulabilité améliorée, une plasticité technique et une meilleure résistance à la corrosion; il contient, en % en masse : 0,5-4,0 de chrome, 4,0-7,0 d'aluminium, ≤ 2,0 de titane, ≤ 4,0 de molybdène, 12,0-16,0 de tungstène, 3,0-12,0 de tantale, 4,0-9,0 de cobalt, ≤ 2,0 de niobium, 0,003-0,1 d'yttrium, 0,001-0,1 de lanthane, 0,003-0,1 de cérium, ≤ 0,1 de carbone, le reste étant du nickel.
PCT/RU2008/000129 2007-03-07 2008-03-06 Composition d'un alliage à base de nickel résistant à la chaleur pour coulée monocristalline (et variantes) WO2008108688A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2007108480 2007-03-07
RU2007108480/02A RU2348724C2 (ru) 2007-03-07 2007-03-07 Состав жаропрочного никелевого сплава для монокристального литья (варианты)

Publications (1)

Publication Number Publication Date
WO2008108688A1 true WO2008108688A1 (fr) 2008-09-12

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PCT/RU2008/000129 WO2008108688A1 (fr) 2007-03-07 2008-03-06 Composition d'un alliage à base de nickel résistant à la chaleur pour coulée monocristalline (et variantes)

Country Status (2)

Country Link
RU (1) RU2348724C2 (fr)
WO (1) WO2008108688A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2484167C1 (ru) * 2012-03-27 2013-06-10 Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" (ФГУП "ВИАМ") СПЛАВ НА ОСНОВЕ ИНТЕРМЕТАЛЛИДА Ni3Al И ИЗДЕЛИЕ, ВЫПОЛНЕННОЕ ИЗ НЕГО

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU1513934C (ru) * 1988-01-04 1995-04-10 Всесоюзный научно-исследовательский институт авиационных материалов Монокристаллический сплав на основе никеля
SU1827121A3 (ru) * 1991-06-28 1995-07-09 Всероссийский научно-исследовательский институт авиационных материалов Монокристаллический сплав на основе никеля
US6007645A (en) * 1996-12-11 1999-12-28 United Technologies Corporation Advanced high strength, highly oxidation resistant single crystal superalloy compositions having low chromium content
RU2219272C1 (ru) * 2002-08-29 2003-12-20 Открытое акционерное общество "Композит" Жаропрочный литейный сплав на основе никеля

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU1513934C (ru) * 1988-01-04 1995-04-10 Всесоюзный научно-исследовательский институт авиационных материалов Монокристаллический сплав на основе никеля
SU1827121A3 (ru) * 1991-06-28 1995-07-09 Всероссийский научно-исследовательский институт авиационных материалов Монокристаллический сплав на основе никеля
US6007645A (en) * 1996-12-11 1999-12-28 United Technologies Corporation Advanced high strength, highly oxidation resistant single crystal superalloy compositions having low chromium content
RU2219272C1 (ru) * 2002-08-29 2003-12-20 Открытое акционерное общество "Композит" Жаропрочный литейный сплав на основе никеля

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KOLACHEV B.A. ET AL.: "Metallovedenie i termicheskaya obrabotka tvsetnykh metallov i splavov", MOSCOW, MISIS, 2005, pages 335 - 337 *

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RU2348724C2 (ru) 2009-03-10
RU2007108480A (ru) 2008-09-20

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