EP1914327A1 - Nickel-base superalloy - Google Patents

Nickel-base superalloy Download PDF

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Publication number
EP1914327A1
EP1914327A1 EP06021724A EP06021724A EP1914327A1 EP 1914327 A1 EP1914327 A1 EP 1914327A1 EP 06021724 A EP06021724 A EP 06021724A EP 06021724 A EP06021724 A EP 06021724A EP 1914327 A1 EP1914327 A1 EP 1914327A1
Authority
EP
European Patent Office
Prior art keywords
superalloy
nickel
base superalloy
component
range
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.)
Withdrawn
Application number
EP06021724A
Other languages
German (de)
French (fr)
Inventor
Magnus Hasselqvist
Gordon Mccolvin
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP06021724A priority Critical patent/EP1914327A1/en
Priority to PCT/EP2007/059936 priority patent/WO2008046708A1/en
Priority to JP2009532751A priority patent/JP5124582B2/en
Priority to EP07803558.1A priority patent/EP2076616B1/en
Priority to US12/311,873 priority patent/US20100296962A1/en
Priority to CN200780038506XA priority patent/CN101528959B/en
Publication of EP1914327A1 publication Critical patent/EP1914327A1/en
Withdrawn legal-status Critical Current

Links

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
    • C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%

Definitions

  • the invention relates to nickel-base superalloys and to components containing these alloys.
  • Nickel-base superalloys are used in applications where a combination of high strength and a strong resistance to chemical attacks at high temperatures is needed. They are employed for the production of components of gas turbines such as blades and vanes. These parts are arranged in the hot section of a turbine and thus have to withstand high temperatures and an aggressive atmosphere.
  • Nickel-base superalloys and components of the above mentioned kind are disclosed for example in US 6,818,077 , US 6,419,763 , US 6,177,046 , EP 0 789 087 and EP 0 637 474 .
  • the nickel-base superalloy of the invention comprises in wt%: Co + Fe + Mn 0 - 20 Al 4 - 6 Cr >12 - 20 Ta >7.5 - 15 Ti 0 - ⁇ 0.45 V 0 - 1 Nb 0 - ⁇ 0.28 Mo 0 - 2.5 Mo + W + Re + Rh 2 - 8 Ru + Os + Ir + Pt + Pd 0 - 4 Hf 0 - 1.5 C + B + Zr 0 - 0.5 Ca + Mg + Cu 0 - 0.5 Y + La + Sc + Ce + Actinides + Lanthanides 0 - 0.5 Si 0 - 0.5 Ni balance
  • Nb and V can be added to the superalloy, but since they are detrimental to the oxidation resistance, they should at most be added in limited quantities.
  • the amount of Ti should not exceed 0.45 and the amount of V should not exceed 1 wt% respectively.
  • the amount of matrix strengthening elements Mo, W, Re and Rh is between 2 and 8 wt%.
  • Hf, C, B, Zr, Ca, Mg, Cu, Y, La, Sc, Ce, actinites and lanthanides, and Si can be present in the superalloy in order to adapt its properties to special needs such as grain boundary strengtheners, oxide scale fortification, and compatibility with specific coating systems.
  • the content of Ti can be in the range (in wt%) of 0-0.40. Preferably it can be 0-0.35, more preferably 0-0.30 and most preferably 0-0.20.
  • the content of Nb (in wt%) can be in the range of 0-0.25, preferably 0-0.20, more preferably 0-0.15 and most preferably 0-0.10.
  • the content of C (in wt%) can be in the range of 0-0.15, preferably 0-0.08, more preferably 0.01-0.06 and most preferably 0.02-0.04.
  • the superalloy of the invention can also contain B in the range (in wt%) of 0-0.02, preferably 0-0.01, more preferably 0.001-0.008 and most preferably 0.003-0.007.
  • a conventional cast component, directionally solified component and a single crystal component, which comprise the super alloy are provided.
  • a conventional cast or a single crystal component consisting of a superalloy which comprises in wt%: Co + Fe + Mn 0 - 20 Al 4 - 6 Cr >12 - 20 Ta >7.5 - 15 Ti 0 - 1.5 V 0 - 1 Ti + Nb + V 0 - 2 Mo 0 - 2.5 Mo + W + Re + Rh 2 - 8 Ru + Os + Ir + Pt + Pd 0 - 4 Hf 0 - 1.5 C + B + Zr 0 - 0.5 Ca + Mg + Cu 0 - 0.5 Y + La + Sc + Ce + Actinides + Lanthanides 0 - 0.5 Si 0 - 0.5 Ni balance is provided.
  • the components of the invention can especially be part of a gas turbine, for example a turbine blade or vane.
  • the particle content was measured to be ⁇ 60 vol%.

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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)

Abstract

The invention relates to nickel-base superalloy comprising in wt%, especially consisting of: Co + Fe + Mn 0 - 20, Al 4 - 6, Cr >12 - 20, Ta >7.5 - 15, Ti 0 - <0.45, V 0 - 1, Nb 0 - <0.28, Mo 0 - 2.5, Mo + W + Re + Rh 2 - 8, Ru + Os + Ir + Pt + Pd 0 - 4, Hf 0 - 1.5, C + B + Zr 0 - 0.5, Ca + Mg + Cu 0 - 0.5, Y + La + Sc + Ce + Actinides + Lanthanides 0 - 0.5 Si 0 - 0.5 Ni balance and unavoidable impurities.

Description

  • The invention relates to nickel-base superalloys and to components containing these alloys.
  • Nickel-base superalloys are used in applications where a combination of high strength and a strong resistance to chemical attacks at high temperatures is needed. They are employed for the production of components of gas turbines such as blades and vanes. These parts are arranged in the hot section of a turbine and thus have to withstand high temperatures and an aggressive atmosphere.
  • Nickel-base superalloys and components of the above mentioned kind are disclosed for example in US 6,818,077 , US 6,419,763 , US 6,177,046 , EP 0 789 087 and EP 0 637 474 .
  • It is an object of the present invention to provide a nickel-base superalloy, which combines high strength, high oxidation resistance, high corrosion resistance, microstructural stability and a large heat treatment window. It is a further object of the present invention to provide components, which comprise such a superalloy.
  • These objects are solved by the superalloy of claim 1 and the components of claims 7, 8, 9 and 10.
  • The nickel-base superalloy of the invention comprises in wt%:
    Co + Fe + Mn 0 - 20
    Al 4 - 6
    Cr >12 - 20
    Ta >7.5 - 15
    Ti 0 - <0.45
    V 0 - 1
    Nb 0 - <0.28
    Mo 0 - 2.5
    Mo + W + Re + Rh 2 - 8
    Ru + Os + Ir + Pt + Pd 0 - 4
    Hf 0 - 1.5
    C + B + Zr 0 - 0.5
    Ca + Mg + Cu 0 - 0.5
    Y + La + Sc + Ce +
    Actinides + Lanthanides 0 - 0.5
    Si 0 - 0.5
    Ni balance
  • Especially the superalloy consists of these elements.
  • It contains significant levels of Al, Cr and Ta to provide a combination of high strength, high oxidation resistance, high corrosion resistance.
  • Along Ta with other partical strengtheners like Ti, Nb and V can be added to the superalloy, but since they are detrimental to the oxidation resistance, they should at most be added in limited quantities. The amount of Ti should not exceed 0.45 and the amount of V should not exceed 1 wt% respectively.
  • The amount of matrix strengthening elements Mo, W, Re and Rh is between 2 and 8 wt%.
  • Other elements like Hf, C, B, Zr, Ca, Mg, Cu, Y, La, Sc, Ce, actinites and lanthanides, and Si can be present in the superalloy in order to adapt its properties to special needs such as grain boundary strengtheners, oxide scale fortification, and compatibility with specific coating systems.
  • The content of Ti can be in the range (in wt%) of 0-0.40. Preferably it can be 0-0.35, more preferably 0-0.30 and most preferably 0-0.20.
  • It was also found that the content of Nb (in wt%) can be in the range of 0-0.25, preferably 0-0.20, more preferably 0-0.15 and most preferably 0-0.10.
  • According to another embodiment of the invention the content of C (in wt%) can be in the range of 0-0.15, preferably 0-0.08, more preferably 0.01-0.06 and most preferably 0.02-0.04.
  • The superalloy of the invention can also contain B in the range (in wt%) of 0-0.02, preferably 0-0.01, more preferably 0.001-0.008 and most preferably 0.003-0.007.
  • According to one aspect of the invention a conventional cast component, directionally solified component and a single crystal component, which comprise the super alloy are provided.
  • According to another aspect of the invention, a conventional cast or a single crystal component consisting of a superalloy, which comprises in wt%:
    Co + Fe + Mn 0 - 20
    Al 4 - 6
    Cr >12 - 20
    Ta >7.5 - 15
    Ti 0 - 1.5
    V 0 - 1
    Ti + Nb + V 0 - 2
    Mo 0 - 2.5
    Mo + W + Re + Rh 2 - 8
    Ru + Os + Ir + Pt + Pd 0 - 4
    Hf 0 - 1.5
    C + B + Zr 0 - 0.5
    Ca + Mg + Cu 0 - 0.5
    Y + La + Sc + Ce + Actinides + Lanthanides 0 - 0.5
    Si 0 - 0.5
    Ni balance
    is provided.
  • Especially the superalloy consists of these elements.
  • The components of the invention can especially be part of a gas turbine, for example a turbine blade or vane.
  • In the following one preferred embodiment of the invention is described. A superalloy was cast which had the composition given in table 1. Table 1
    Element wt%
    Co 4.12
    Cr 14.2
    Mo 0.96
    W 2.51
    Al 5.47
    Ta 10.1
    Hf 0.41
    C 0.04
    B 0.005
  • In order to characterize the properties of the cast superalloy different experiments were conducted.
  • Solutioning experiments for 4h at 1220, 1250, 1260, 1270 and 1300°C followed by water quenching were done. At 1220°C residual particles were seen and at 1250, 1260, 1270 and 1300°C full solutioning without incipient melting was observed.
  • Further a heat treatment at 1250°C for 8h, 1100°C for 4h and 850°C for 24h was applied. SEM and TEM analysis showed a very regular microstructure with primary particles of ~0.35 µm side length and a significant amount of secondary particles (see figures 1 and 2).
  • No trace of TCP phases were found. The particle content was measured to be ~60 vol%.
  • Accordingly it was shown that the superalloy posses a large heat treatment window and a good microstructural stability.

Claims (10)

  1. A nickel-base superalloy comprising in wt%, especially consisting of: Co + Fe + Mn 0 - 20 Al 4 - 6 Cr >12 - 20 Ta >7.5 - 15 Ti 0 - <0.45 V 0 - 1 Nb 0 - <0.28 Mo 0 - 2.5 Mo + W + Re + Rh 2 - 8 Ru + Os + Ir + Pt + Pd 0 - 4 Hf 0 - 1.5 C + B + Zr 0 - 0.5 Ca + Mg + Cu 0 - 0.5 Y + La + Sc + Ce + Actinides + Lanthanides 0 - 0.5 Si 0 - 0.5 Ni balance
    and unavoidable impurities.
  2. The nickel-base superalloy as claimed in claim 1, wherein Ti is in the range (in wt%) of 0 - 0.40, preferably 0 - 0.35, more preferably 0 - 0.30 and most preferably 0 - 0.20.
  3. The nickel-base superalloy as claimed in any of the preceding claims,
    wherein Nb is in the range (in wt%) of 0 - 0.25, preferably 0 - 0.20, more preferably 0 - 0.15 and most preferably 0 - 0.10.
  4. The nickel-base superalloy as claimed in any of the preceding claims,
    wherein C is in the range (in wt%) of
    0 - 0.15, preferably 0 - 0.08, more preferably
    0.01 - 0.06 and most preferably 0.02 - 0.04.
  5. The nickel-base superalloy as claimed in any of the preceding claims,
    wherein B is in the range (in wt%) of
    0 - 0.02,
    preferably 0 - 0.01,
    more preferably
    0.001 - 0.008 and most preferably 0.003 - 0.007.
  6. A conventional cast component comprising a superalloy according to any of the claims 1 to 5.
  7. A directionally solified component comprising a superalloy according to any of the claims 1 to 5.
  8. A single crystal component comprising a superalloy according to any of the claims 1 to 5.
  9. A conventional cast or a single crystal component consisting of a superalloy which comprises in wt%, especially consisting of: Co + Fe + Mn 0 - 20 Al 4 - 6 Cr >12 - 20 Ta >7.5 - 15 Ti 0 - 1.5 V 0 - 1 Ti + Nb + V 0 - 2 Mo 0 - 2.5 Mo + W + Re + Rh 2 - 8 Ru + Os + Ir + Pt + Pd 0 - 4 Hf 0 - 1.5 C + B + Zr 0 - 0.5 Ca + Mg + Cu 0 - 0.5 Y + La + Sc + Ce + Actinides + Lanthanides 0 - 0.5 Si 0 - 0.5 Ni balance
    and unavoidable impurities.
  10. The component according to any of the claims 6 to 9,
    wherein the component is a part of a gas turbine.
EP06021724A 2006-10-17 2006-10-17 Nickel-base superalloy Withdrawn EP1914327A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP06021724A EP1914327A1 (en) 2006-10-17 2006-10-17 Nickel-base superalloy
PCT/EP2007/059936 WO2008046708A1 (en) 2006-10-17 2007-09-20 Nickel-base superalloys
JP2009532751A JP5124582B2 (en) 2006-10-17 2007-09-20 Nickel-base superalloy
EP07803558.1A EP2076616B1 (en) 2006-10-17 2007-09-20 Nickel-base superalloys
US12/311,873 US20100296962A1 (en) 2006-10-17 2007-09-20 Nickel-base superalloys
CN200780038506XA CN101528959B (en) 2006-10-17 2007-09-20 Nickel-base superalloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06021724A EP1914327A1 (en) 2006-10-17 2006-10-17 Nickel-base superalloy

Publications (1)

Publication Number Publication Date
EP1914327A1 true EP1914327A1 (en) 2008-04-23

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EP07803558.1A Active EP2076616B1 (en) 2006-10-17 2007-09-20 Nickel-base superalloys

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US (1) US20100296962A1 (en)
EP (2) EP1914327A1 (en)
JP (1) JP5124582B2 (en)
CN (1) CN101528959B (en)
WO (1) WO2008046708A1 (en)

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WO2010124923A1 (en) * 2009-04-27 2010-11-04 Siemens Aktiengesellschaft NICKEL BASE γ/ γ' SUPERALLOY WITH MULTIPLE REACTIVE ELEMENTS AND USE OF SAID SUPERALLOY IN COMPLEX MATERIAL SYSTEMS
EP2431489A1 (en) 2010-09-20 2012-03-21 Siemens Aktiengesellschaft Nickel-base superalloy
CN102876953A (en) * 2012-09-27 2013-01-16 无锡宏昌五金制造有限公司 High-temperature nickel-chromium alloy
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