EP0260465B1 - Superalliage à base de nickel et renforcé par une dispersion d'oxyde, présentant une bonne résistance à la corrosion - Google Patents

Superalliage à base de nickel et renforcé par une dispersion d'oxyde, présentant une bonne résistance à la corrosion Download PDF

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Publication number
EP0260465B1
EP0260465B1 EP87112012A EP87112012A EP0260465B1 EP 0260465 B1 EP0260465 B1 EP 0260465B1 EP 87112012 A EP87112012 A EP 87112012A EP 87112012 A EP87112012 A EP 87112012A EP 0260465 B1 EP0260465 B1 EP 0260465B1
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EP
European Patent Office
Prior art keywords
weight
oxide dispersion
corrosion resistance
improved corrosion
following composition
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.)
Expired - Lifetime
Application number
EP87112012A
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German (de)
English (en)
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EP0260465A1 (fr
Inventor
Peter Jongenburger
Robert Dr. Singer
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.)
BBC Brown Boveri AG Switzerland
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BBC Brown Boveri AG Switzerland
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Publication date
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Publication of EP0260465A1 publication Critical patent/EP0260465A1/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
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
    • C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
    • C22C32/0026—Matrix based on Ni, Co, Cr or alloys thereof

Definitions

  • Oxide dispersion-hardened superalloys based on nickel which, thanks to their excellent mechanical properties at high temperatures, are used thermally and mechanically under high stress during construction of thermal machines. Preferred use as blade materials for gas turbines.
  • the invention relates to the further development of oxide dispersion-hardened nickel-based superalloys with overall optimal properties with regard to high-temperature strength, long-term stability and resistance to oxidation and corrosion in an aggressive atmosphere.
  • Ni rest (See HF Merrick, LR Curwick and YG Kim, Nasa Report CR-135150, Contract NAS-3-19694, 1977, Cleveland, Ohio, USA and RC Benn, LR Curwick and GAJ hack, Powder Met. 1981, No. 4 , p. 191-195).
  • This alloy which has increased Cr and Al contents compared to MA 6000, has improved corrosion resistance, but tends to become unstable due to the formation of brittle phases in certain temperature ranges, which deteriorate the mechanical properties.
  • the invention has for its object an oxide dispersion hardened superalloy based on nickel Specify which, while maintaining the highest possible heat resistance, in particular creep limit, while avoiding the formation of brittle phases, has an increased resistance to sulfidation.
  • the alloy should be stable over the long term and should not change even over a long period of operation.
  • a melt of the above composition was prepared, but without the addition of Y2O3 and converted into a powder by gas atomization using argon under high pressure.
  • the powder was comparatively coarse. Particles with a diameter of over 300 ⁇ m were retained using a sieve. The fractions below were used again.
  • the alloy powder was mixed with fine Y2O3 powder with a maximum particle diameter of 1 ⁇ m and a maximum crystallite diameter of 100 nm. Then the powder mixture was mechanically alloyed in the attritor for 36 hours under an argon atmosphere.
  • the Attritor 5-1 from Netzsch, Federal Republic of Germany had a volume of 3 liters and a filling of 12 kg steel balls. The capacity for the powder was 1 kg.
  • the mechanical properties were examined. In particular, the creep rupture strength (creep limit) for a period of 5. 104 h measured at different temperatures. The values were: Temperature (° C) Creep rupture strength (MPa) 800 215 900 158 1000 138
  • the resistance to oxidation and corrosion was better than that of the known alloy with the trade name MA 6000.
  • Samples with a smooth surface were subjected to a temperature cycle in air and the specific weight change per unit area was determined after 1000 cycles.
  • One cycle lasted approximately one hour: the test specimen was heated to a temperature of 1000 ° C. and left at this temperature for 1 hour. Then, it was cooled and reheated at a rate of 500 ° C / min, and so on.
  • the change in weight is a measure of the resistance to oxidation.
  • the change in weight was + 0.5 mg / cm2 surface
  • the creep rupture strength measured on samples for a period of 5.104 h as a function of temperature was: Temperature (° C) Creep rupture strength (MPa) 800 221 900 165 1000 140
  • the resistance to oxidation was determined by weight change as defined in Example I and was + 0.5 mg / cm2 surface.
  • the creep rupture strength measured on samples for a period of 5 ⁇ 104 h as a function of temperature was: Temperature (° C) Creep rupture strength (MPa) 800 205 900 145 1000 115
  • the resistance to oxidation was determined by weight change as defined in Example I and was + 0.4 mg / cm2 surface.
  • the invention is not restricted to the exemplary embodiments.
  • the hafnium improves cross-strength in particular.
  • Cobalt increases strength and improves workability

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Chemically Coating (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Claims (7)

  1. Superalliage à base de nickel durci par une dispersion d'oxyde ayant une résistance améliorée à la corrosion, caractérisé en ce qu'il a la composition suivante :

    Cr = 17 - 18% en poids
    Al = 6 - 7% en poids
    Mo = 2 - 2,5% en poids
    W = 3 - 3,5% en poids
    Ta = 2 - 2,5% en poids
    Zr < 0,2% en poids
    B < 0,02% en poids
    C < 0,1% en poids
    Y₂O₃ = 1 - 1,5% en poids
    Ni = reste.
  2. Superalliage durci par une dispersion d'oxyde suivant la revendication 1, caractérisé par la composition suivante :

    Cr = 17,0% en poids
    Al = 6,0% en poids
    Mo = 2,0% en poids
    W = 3,5% en poids
    Ta = 2,0% en poids
    Zr = 0,15% en poids
    B = 0,01% en poids
    C = 0,05% en poids
    Y₂O₃ = 1,1% en poids
    Ni = reste.
  3. Superalliage à base de nickel durci par une dispersion d'oxyde ayant une résistance améliorée à la corrosion, caractérisé en ce qu'il a la composition suivante :

    Cr = 17 - 18% en poids
    Al = 6 - 7% en poids
    Mo = 2 - 2,5% en poids
    W = 3 - 3,5% en poids
    Ta = 2 - 2,5% en poids
    Hf = 0,5 - 1,5% en poids
    Zr < 0,2% en poids
    B < 0,02% en poids
    C < 0,1% en poids
    Y₂O₃ = 1 - 1,5% en poids
    Ni = reste.
  4. Superalliage durci par une dispersion d'oxyde suivant la revendication 3, caractérisé par la composition suivante :

    Cr = 17,0% en poids
    Al = 6,0% en poids
    Mo = 2,0% en poids
    W = 3,5% en poids
    Ta = 2,0% en poids
    Hf = 1,0% en poids
    Zr = 0,15% en poids
    B = 0,01% en poids
    C = 0,05% en poids
    Y₂O₃ = 1,1% en poids
    Ni = reste.
  5. Superalliage à base de nickel durci par une dispersion d'oxyde ayant une résistance améliorée à la corrosion, caractérisé en ce qu'il a la composition suivante :

    Cr = 16 - 18% en poids
    Al = 6 - 7% en poids
    Co = 8 - 10% en poids
    Ta = 5 - 7% en poids
    Zr < 0,2% en poids
    B < 0,02% en poids
    C < 0,1% en poids
    Y₂O₃ = 1 - 1,5% en poids
    Ni = reste.
  6. Superalliage durci par une dispersion d'oxyde suivant la revendication 5, caractérisé par la composition suivante :

    Cr = 17,0% en poids
    Al = 6,0% en poids
    Co = 10,0% en poids
    Ta = 5,0% en poids
    Zr = 0,15% en poids
    B = 0,01% en poids
    C = 0,05% en poids
    Y₂O₃ = 1,1% en poids
    Ni = reste.
  7. Superalliage durci par une dispersion d'oxyde suivant la revendication 5, caractérisé par la composition suivante :

    Cr = 17,0% en poids
    Al = 6,0% en poids
    Co = 8,0% en poids
    Ta = 6,5% en poids
    Zr = 0,15% en poids
    B = 0,01% en poids
    C = 0,05% en poids
    Y₂O₃ = 1,1% en poids
    Ni = reste.
EP87112012A 1986-09-08 1987-08-19 Superalliage à base de nickel et renforcé par une dispersion d'oxyde, présentant une bonne résistance à la corrosion Expired - Lifetime EP0260465B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH359386 1986-09-08
CH3593/86 1986-09-08

Publications (2)

Publication Number Publication Date
EP0260465A1 EP0260465A1 (fr) 1988-03-23
EP0260465B1 true EP0260465B1 (fr) 1992-01-02

Family

ID=4259333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112012A Expired - Lifetime EP0260465B1 (fr) 1986-09-08 1987-08-19 Superalliage à base de nickel et renforcé par une dispersion d'oxyde, présentant une bonne résistance à la corrosion

Country Status (5)

Country Link
US (1) US4798625A (fr)
EP (1) EP0260465B1 (fr)
JP (1) JP2630323B2 (fr)
DE (1) DE3775671D1 (fr)
NO (1) NO873738L (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59007734D1 (de) * 1989-05-16 1995-01-05 Asea Brown Boveri Verfahren zur Erzeugung grober längsgerichteter Stengelkristalle in einer oxyddispersionsgehärteten Nickelbasis-Superlegierung.
US5427601A (en) * 1990-11-29 1995-06-27 Ngk Insulators, Ltd. Sintered metal bodies and manufacturing method therefor
DE4110543A1 (de) * 1991-03-30 1992-10-01 Pm Hochtemperatur Metall Gmbh Oxiddispersionsgehaertete ausscheidungshaertbare nickel-chromlegierung
CZ290109B6 (cs) * 1991-08-02 2002-06-12 Isover Saint-Gobain Způsob výroby minerální vlny z roztaveného minerálního materiálu a zařízení pro provádění tohoto způsobu
US6412465B1 (en) 2000-07-27 2002-07-02 Federal-Mogul World Wide, Inc. Ignition device having a firing tip formed from a yttrium-stabilized platinum-tungsten alloy
JP2013181213A (ja) * 2012-03-01 2013-09-12 Hokkaido Univ 酸化物分散強化型ニッケル基超合金

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776704A (en) * 1968-03-01 1973-12-04 Int Nickel Co Dispersion-strengthened superalloys
US3738817A (en) * 1968-03-01 1973-06-12 Int Nickel Co Wrought dispersion strengthened metals by powder metallurgy
US3728088A (en) * 1968-03-01 1973-04-17 Int Nickel Co Superalloys by powder metallurgy
US3754902A (en) * 1968-06-05 1973-08-28 United Aircraft Corp Nickel base superalloy resistant to oxidation erosion
US3809545A (en) * 1969-08-25 1974-05-07 Int Nickel Co Superalloys by powder metallurgy
US3660049A (en) * 1969-08-27 1972-05-02 Int Nickel Co Dispersion strengthened electrical heating alloys by powder metallurgy
NL171309C (nl) * 1970-03-02 1983-03-01 Hitachi Ltd Werkwijze voor de vervaardiging van een halfgeleiderlichaam, waarbij een laag van siliciumdioxyde wordt gevormd op een oppervlak van een monokristallijn lichaam van silicium.
US3749612A (en) * 1971-04-06 1973-07-31 Int Nickel Co Hot working of dispersion-strengthened heat resistant alloys and the product thereof
US3743548A (en) * 1971-05-06 1973-07-03 Cabot Corp Dispersion hardened metals having improved oxidation characteristics at elevated temperature
US3926568A (en) * 1972-10-30 1975-12-16 Int Nickel Co High strength corrosion resistant nickel-base alloy
US4080204A (en) * 1976-03-29 1978-03-21 Brunswick Corporation Fenicraly alloy and abradable seals made therefrom
US4386976A (en) * 1980-06-26 1983-06-07 Inco Research & Development Center, Inc. Dispersion-strengthened nickel-base alloy
JPS58193335A (ja) * 1982-05-06 1983-11-11 Sumitomo Electric Ind Ltd 分散強化型ニツケル基耐熱焼結合金およびその製造法
US4599214A (en) * 1983-08-17 1986-07-08 Exxon Research And Engineering Co. Dispersion strengthened extruded metal products substantially free of texture
US4631082A (en) * 1985-02-20 1986-12-23 Pfizer Hospital Products Group Inc. Cobalt-chromium superalloy

Also Published As

Publication number Publication date
JPS6369936A (ja) 1988-03-30
DE3775671D1 (de) 1992-02-13
NO873738L (no) 1988-03-09
JP2630323B2 (ja) 1997-07-16
EP0260465A1 (fr) 1988-03-23
NO873738D0 (no) 1987-09-07
US4798625A (en) 1989-01-17

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