WO2018036797A1 - Sx-nickel alloy having improved tmf properties, raw material, and component - Google Patents

Sx-nickel alloy having improved tmf properties, raw material, and component Download PDF

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Publication number
WO2018036797A1
WO2018036797A1 PCT/EP2017/069917 EP2017069917W WO2018036797A1 WO 2018036797 A1 WO2018036797 A1 WO 2018036797A1 EP 2017069917 W EP2017069917 W EP 2017069917W WO 2018036797 A1 WO2018036797 A1 WO 2018036797A1
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Prior art keywords
raw material
component
alloy
properties
nickel alloy
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PCT/EP2017/069917
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German (de)
French (fr)
Inventor
Eike Kohlhoff
Britta Stöhr
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Siemens Aktiengesellschaft
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Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP17755087.8A priority Critical patent/EP3472364A1/en
Priority to US16/326,409 priority patent/US20210285075A1/en
Publication of WO2018036797A1 publication Critical patent/WO2018036797A1/en

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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

  • the invention relates to a nickel-based SX alloy with improved TMF properties, a raw material and a component.
  • the LCF service life at high strain ranges is also reduced by the brittle fracture behavior between room temperature and 923 K.
  • a material having the following composition is advantageous:
  • Co Co 9.0% - 11%, especially 10%
  • Rhenium (Re) 1.0% - 1.30%, in particular 1.25%
  • Yttrium (Y) 0.017% - 0.023%, especially 0, 02%.
  • This material differs from previous Ni-SX compositions by a significantly higher proportion of chromium (Cr), a reduced proportion of rhenium (Re), the addition of silicon (Si) and yttrium (Y) and the fact that it is not titanium ( Ti), except for impurities of max. 0.1 wt. -%.
  • Silicon (Si) improves oxidation resistance
  • Si silicon
  • the LCF life is increased by the increased yield strength at low temperatures and high strain ranges. Reducing the proportion of rhenium (Re) reduces the risk of TCP phase formation, which has a very negative effect on TMF behavior, provided that it is formed during operation.
  • the reduction of rhenium (Re) also allows an increase in the chromium content without stabilizing unwanted TCP phases.
  • the new material should have oxidation properties at least at the level of Alloy 247.
  • the addition of yttrium (Y) has the effect that the material has a particularly good cyclic oxidation properties (improvement of the A1203 topcoat adhesion).
  • the silicon (Si) is mainly incorporated in the ⁇ ⁇ phase, while it is incorporated in titanium-containing materials in the ⁇ phase.
  • the accumulation of silicon (Si) in ⁇ -phase is rather undesirable because this would favor the precipitation of sputtering phases in the channels (eg G-phase).
  • the shear strength is increased by the silicon incorporation into the ⁇ ⁇ phase.

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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 an improved composition of a nickel-based superalloy with Ni-8Cr-10Co-0.6Mo-8Ta-1.25Re-5.7Al-0Ti- 0.1Hf-0.25Si-0.008B-0.0210C-0.02Y, by means of which composition improved TMF properties are achieved.

Description

SX-Nickel -Legierung mit verbesserten TMF-Eigenschaften, Rohmaterial und Bauteil  SX-nickel alloy with improved TMF properties, raw material and component
Die Erfindung betrifft eine nickelbasierte SX-Legierung mit verbesserten TMF-Eigenschaften, ein Rohmaterial und ein Bauteil . The invention relates to a nickel-based SX alloy with improved TMF properties, a raw material and a component.
Um eine höhere Turbineneintrittstemperatur und damit einen höheren Wirkungsgrad zu ermöglichen, werden derzeit SX-Werk- stoffe aus Nickelbasis untersucht. Diese Werkstoffe sollen über eine deutlich höhere Kriechbeständigkeit im Vergleich zu den bekannten SX-Werkstoffen und insbesondere bei hohen Temperaturen über eine deutlich erhöhte Zugfestigkeit verfügen. Allerdings zeigt sich in ersten Untersuchungen zum TMF-Ver- halten, dass die Werkstoffe bei tieferen Temperaturen (373K) und hohen Dehnschwingbreiten zu einem spröden Verhalten und damit zu reduzierten TMF-Lebensdauern tendiert. In order to enable a higher turbine inlet temperature and thus a higher degree of efficiency, SX materials based on nickel are currently being investigated. These materials should have a significantly higher creep resistance compared to the known SX materials and especially at high temperatures on a significantly increased tensile strength. However, initial studies on the TMF behavior show that the materials tend to exhibit brittle behavior and thus reduced TMF lifetimes at lower temperatures (373 K) and high strain ranges.
Die LCF-Lebensdauer bei hohen Dehnschwingbreiten wird eben- falls durch das Sprödbruchverhalten zwischen Raumtemperatur und 923 K reduziert. The LCF service life at high strain ranges is also reduced by the brittle fracture behavior between room temperature and 923 K.
Während früher die Kriecheigenschaften als lebensdauerbestimmend galten, gewinnen die TMF-Eigenschaften jedoch zunehmend an Bedeutung. Dies liegt an verbesserten Kühlluftkonzepten, die für lokale kalte und heiße Bereiche sorgen: Gleichzeitig werden die Zeitabschnitte einer stationären Nutzung zunehmend kürzer. Die systematische Untersuchung von TMF-Eigenschaften befindet sich noch ganz am Anfang. Daher sind die Probleme dieses Werkstoffs bislang nicht bekannt geworden.  While the creep properties used to be lifetime-determining, the TMF properties are becoming increasingly important. This is due to improved cooling air concepts that provide for local cold and hot areas: At the same time, the periods of stationary use are increasingly shorter. The systematic study of TMF properties is still in its infancy. Therefore, the problems of this material have not been known.
Es ist daher Aufgabe der Erfindung oben genanntes Problem zu lösen . It is therefore an object of the invention to solve the above-mentioned problem.
Die Aufgabe wird gelöst durch eine Legierung gemäß Anspruch 1, ein Rohmaterial gemäß Anspruch 2 und ein Bauteil gemäß Anspruch 3. In den Unteransprüchen sind weitere vorteilhafte Maßnahmen aufgelistet, die beliebig miteinander kombiniert werden können, um weitere Vorteile zu erzielen. The object is achieved by an alloy according to claim 1, a raw material according to claim 2 and a component according to claim 3. In the dependent claims further advantageous measures are listed, which can be combined with each other in order to achieve further advantages.
Die Beschreibung stellt nur Ausführungsbeispiele der Erfindung dar . The description is only exemplary embodiments of the invention.
Vorzugsweise ist ein Werkstoff mit der folgenden Zusammenset- zung vorteilhaft: Preferably, a material having the following composition is advantageous:
Nickelbasierte Legierung,  Nickel-based alloy,
zumindest aufweisend (in Gew.-%) : at least comprising (in% by weight):
Chrom (Cr) 7,0% - 9,0%, insbesondere 8,0%,  Chromium (Cr) 7.0% - 9.0%, in particular 8.0%,
Kobalt (Co) 9,0% - 11%, insbesondere 10%,  Cobalt (Co) 9.0% - 11%, especially 10%,
Molybdän (Mo) 0,4% - 0,8%, insbesondere 0,6%,  Molybdenum (Mo) 0.4% - 0.8%, in particular 0.6%,
Tantal (Ta) 7,0% - 9,0%, insbesondere 8,0%,  Tantalum (Ta) 7.0% - 9.0%, especially 8.0%,
Wolfram (W) 7,0% - 9,0%, insbesondere 8,0%,  Tungsten (W) 7.0% - 9.0%, in particular 8.0%,
Rhenium (Re) 1,0% - 1,30%, insbesondere 1,25%,  Rhenium (Re) 1.0% - 1.30%, in particular 1.25%,
Aluminium (AI) 5,0% - 6,4%, insbesondere 5,7%,  Aluminum (AI) 5.0% - 6.4%, in particular 5.7%,
Hafnium (Hf) 0,08% - - 0,12%, insbesondere 0,1%,  Hafnium (Hf) 0.08% - - 0.12%, in particular 0.1%,
Silizium (Si) 0,018% - 0,32%, insbesondere 0,25%,  Silicon (Si) 0.018% - 0.32%, in particular 0.25%,
Bor (B) 0, 003% - 0,015%, insbesondere 0,008%  Boron (B) 0, 003% - 0.015%, especially 0.008%
Kohlenstoff (C) 0,01% - - 0,05%, insbesondere 0, 0210  Carbon (C) 0.01% - - 0.05%, especially 0, 0210
Yttrium (Y) 0,017% - 0,023%, insbesondere 0, 02% .  Yttrium (Y) 0.017% - 0.023%, especially 0, 02%.
Dieser Werkstoff unterscheidet sich von bisherigen Ni-SX Zusammensetzungen durch einen deutlich höheren Anteil an Chrom (Cr) , einen reduzierten Anteil an Rhenium (Re) , den Zusatz von Silizium (Si) und Yttrium (Y) sowie dadurch, dass er kein Titan (Ti) enthält, bis auf Verunreinigungen von max. 0,1 Gew . - % . This material differs from previous Ni-SX compositions by a significantly higher proportion of chromium (Cr), a reduced proportion of rhenium (Re), the addition of silicon (Si) and yttrium (Y) and the fact that it is not titanium ( Ti), except for impurities of max. 0.1 wt. -%.
Der neue Werkstoff hat die folgenden Vorteile: The new material has the following advantages:
Durch den Zusatz von Silizium (Si) erhöht sich die TMF-Fes- tigkeit um den Faktor 2. Dieser Effekt beruht auf folgender Wirkung durch Silizium: The addition of silicon (Si) increases the TMF strength by a factor of 2. This effect is due to the following effect of silicon:
- Silizium (Si) verbessert die Oxidationsbeständigkeit , Silicon (Si) improves oxidation resistance,
- durch Zugabe von Silizium (Si) wird eine erhöhte Dehngrenze bei tiefen Temperaturen erzielt, die im TMF-Versuch zu reduzierten Druckspannungen im Hochtemperaturbereich unter Out- of-Phase Bedingungen und damit zu einem geringeren Rekristallisationsrisiko führt. - By adding silicon (Si) is an increased yield strength at low temperatures, which in the TMF test leads to reduced compressive stresses in the high-temperature range under out-of-phase conditions and thus to a lower risk of recrystallization.
Die LCF Lebensdauer wird durch die erhöhte Dehngrenze bei niedrigen Temperaturen und hohe Dehnschwingbreiten erhöht. Durch die Reduktion des Anteils an Rhenium (Re) sinkt das Risiko für TCP-Phasenbildung, die sich sehr negativ auf das TMF-Verhalten auswirken, sofern sie sich während des Betriebes ausbilden. The LCF life is increased by the increased yield strength at low temperatures and high strain ranges. Reducing the proportion of rhenium (Re) reduces the risk of TCP phase formation, which has a very negative effect on TMF behavior, provided that it is formed during operation.
In Kombination mit der Entfernung von Titan (Ti) ermöglicht die Reduktion an Rhenium (Re) weiterhin eine Anhebung des Chrom-Anteils ohne unerwünschte TCP-Phasen zu stabilisieren. Dadurch sollte der neue Werkstoff über Oxidationseigenschaf- ten verfügen, die mindestens auf dem Niveau des Alloy 247 liegen . Die Zugabe von Yttrium (Y) bewirkt dabei, dass der Werkstoff über eine besonders gute zyklische Oxidationseigenschaften verfügt (Verbesserung der A1203 -Deckschichthaftung) . In combination with the removal of titanium (Ti), the reduction of rhenium (Re) also allows an increase in the chromium content without stabilizing unwanted TCP phases. As a result, the new material should have oxidation properties at least at the level of Alloy 247. The addition of yttrium (Y) has the effect that the material has a particularly good cyclic oxidation properties (improvement of the A1203 topcoat adhesion).
In der titanfreien Legierung wird das Silizium (Si) vorwie- gend in der γλ -Phase eingebaut, während es in titanhaltigen Werkstoffen in der γ -Phase eingebaut wird. Die Anreicherung von Silizium (Si) in γ -Phase ist eher unerwünscht, da dies die Ausscheidung von Sprodphasen in den Kanälen begünstigen würde (z.B. G-Phase) . Weiterhin wird durch den Silizium- Einbau in die γλ -Phase deren Scherfestigkeit erhöht. In the titanium-free alloy, the silicon (Si) is mainly incorporated in the γ λ phase, while it is incorporated in titanium-containing materials in the γ phase. The accumulation of silicon (Si) in γ-phase is rather undesirable because this would favor the precipitation of sputtering phases in the channels (eg G-phase). Furthermore, the shear strength is increased by the silicon incorporation into the γ λ phase.
Durch den reduzierten Anteil an Rhenium (Re) wird die Legierung deutlich günstiger. Der γλ -Anteil ändert sich nur unwesentlich . Due to the reduced proportion of rhenium (Re), the alloy is significantly cheaper. The γ λ component changes only insignificantly.
Die Kriechbeständigkeit bleibt demnach nahezu unbeeinflusst . Die oben vorgestellte Legierung ist vollständig neu. Sofern die TMF-Lebensdauer tatsächlich um den Faktor 2 erhöht werden kann, ergeben sich folgende Vorteile: The creep resistance therefore remains virtually unaffected. The alloy presented above is completely new. If the TMF lifetime can actually be increased by a factor of 2, the following advantages result:
- Lebensdauerverlängerung der Turbinenschaufeln, - lifetime extension of the turbine blades,
- dadurch reduzierte LCCs,  - reduced LCCs,
- technische Vorreiterschaft durch eigene SX-Legierung.  - technical pioneering by own SX-alloy.

Claims

Patentansprüche claims
Nickelbasierte Legierung, Nickel-based alloy,
zumindest aufweisend (in Gew.  at least having (in wt.
Chrom (Cr) 7,0% - 9,0%, insbesondere 8,0%, Chromium (Cr) 7.0% - 9.0%, in particular 8.0%,
Kobalt (Co) 9,0% - 11%, insbesondere 10%,Cobalt (Co) 9.0% - 11%, especially 10%,
Molybdän (Mo) 0,4% - 0,8%, insbesondere 0,6%,Molybdenum (Mo) 0.4% - 0.8%, in particular 0.6%,
Tantal (Ta) 7,0% - 9,0%, insbesondere 8,0%,Tantalum (Ta) 7.0% - 9.0%, especially 8.0%,
Wolfram (W) 7,0% - 9,0%, insbesondere 8,0%,Tungsten (W) 7.0% - 9.0%, in particular 8.0%,
Rhenium (Re) 1,0% - 1,30%, insbesondere 1,25%,Rhenium (Re) 1.0% - 1.30%, in particular 1.25%,
Aluminium (AI) 5,0% - 6,4%, insbesondere 5,7%,Aluminum (AI) 5.0% - 6.4%, in particular 5.7%,
Hafnium (Hf) 0,08% - - 0,12%, insbesondere 0,1%,Hafnium (Hf) 0.08% - - 0.12%, in particular 0.1%,
Silizium (Si) 0,018% - 0,32%, insbesondere 0,25%,Silicon (Si) 0.018% - 0.32%, in particular 0.25%,
Bor (B) 0, 003% - 0,015%, insbesondere 0,008%Boron (B) 0, 003% - 0.015%, especially 0.008%
Kohlenstoff (C) 0,01% - - 0,05%, insbesondere 0, 0210Carbon (C) 0.01% - - 0.05%, especially 0, 0210
Yttrium (Y) 0,017% - 0,023%, insbesondere 0, 02%, insbesondere bestehend aus diesen Elementen. Yttrium (Y) 0.017% - 0.023%, in particular 0, 02%, especially consisting of these elements.
2. Rohmaterial, 2. raw material,
insbesondere Pulver,  especially powder,
zumindest aufweisend eine Legierung gemäß Anspruch 1.  at least comprising an alloy according to claim 1.
3. Bauteil, 3rd component,
zumindest aufweisend eine Legierung gemäß Anspruch 1 oder hergestellt aus einem Rohmaterial gemäß Anspruch 2.  at least comprising an alloy according to claim 1 or prepared from a raw material according to claim 2.
4. Bauteil nach Anspruch, 4. Component according to claim,
das ein Turbinenbauteil darstellt,  which represents a turbine component,
insbesondere eine Turbinenschaufel .  in particular a turbine blade.
5. Legierung, Rohmaterial oder Bauteil nach einem der vorhergehenden Ansprüche, 5. alloy, raw material or component according to one of the preceding claims,
die/das kein Titan (Ti) aufweist. which does not contain titanium (Ti).
6. Legierung, Rohmaterial oder Bauteil nach einem der vorhergehenden Ansprüche, 6. Alloy, raw material or component according to one of the preceding claims,
die/das kein Zirkon (Zr) aufweist.  that does not have zirconium (Zr).
PCT/EP2017/069917 2016-08-22 2017-08-07 Sx-nickel alloy having improved tmf properties, raw material, and component WO2018036797A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17755087.8A EP3472364A1 (en) 2016-08-22 2017-08-07 Sx-nickel alloy having improved tmf properties, raw material, and component
US16/326,409 US20210285075A1 (en) 2016-08-22 2017-08-07 Sx-nickel alloy having improved tmf properties, raw material, and component

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16185120.9 2016-08-22
EP16185120.9A EP3287535A1 (en) 2016-08-22 2016-08-22 Sx nickel alloy with improved tmf properties, raw material and component

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2584654A (en) * 2019-06-07 2020-12-16 Oxmet Tech Limited A nickel-based alloy
GB2607537A (en) * 2019-06-07 2022-12-07 Alloyed Ltd A nickel-based alloy
US11634792B2 (en) 2017-07-28 2023-04-25 Alloyed Limited Nickel-based alloy
GB2618754A (en) * 2019-06-07 2023-11-15 Alloyed Ltd A nickel-based alloy

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2235697A (en) * 1986-12-30 1991-03-13 Gen Electric Nickel-base superalloys
US6375766B1 (en) * 1996-10-01 2002-04-23 Siemens Aktiengesellschaft Nickel-base alloy and article manufactured thereof
WO2006067189A1 (en) * 2004-12-23 2006-06-29 Siemens Aktiengesellschaft A ni based alloy, a component, a gas turbine arrangement and use of pd in connection with such an alloy
WO2010043375A1 (en) * 2008-10-13 2010-04-22 Schmidt + Clemens Gmbh + Co. Kg Nickel-chromium alloy
EP2631324A1 (en) * 2010-10-19 2013-08-28 National Institute for Materials Science Ni-based superalloy member having heat-resistant bond coat layer formed therein

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2235697A (en) * 1986-12-30 1991-03-13 Gen Electric Nickel-base superalloys
US6375766B1 (en) * 1996-10-01 2002-04-23 Siemens Aktiengesellschaft Nickel-base alloy and article manufactured thereof
WO2006067189A1 (en) * 2004-12-23 2006-06-29 Siemens Aktiengesellschaft A ni based alloy, a component, a gas turbine arrangement and use of pd in connection with such an alloy
WO2010043375A1 (en) * 2008-10-13 2010-04-22 Schmidt + Clemens Gmbh + Co. Kg Nickel-chromium alloy
EP2631324A1 (en) * 2010-10-19 2013-08-28 National Institute for Materials Science Ni-based superalloy member having heat-resistant bond coat layer formed therein

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11634792B2 (en) 2017-07-28 2023-04-25 Alloyed Limited Nickel-based alloy
GB2584654A (en) * 2019-06-07 2020-12-16 Oxmet Tech Limited A nickel-based alloy
GB2584654B (en) * 2019-06-07 2022-10-12 Alloyed Ltd A nickel-based alloy
GB2607537A (en) * 2019-06-07 2022-12-07 Alloyed Ltd A nickel-based alloy
GB2618754A (en) * 2019-06-07 2023-11-15 Alloyed Ltd A nickel-based alloy
GB2607537B (en) * 2019-06-07 2024-02-28 Alloyed Ltd A nickel-based alloy
GB2618754B (en) * 2019-06-07 2024-04-10 Alloyed Ltd A nickel-based alloy

Also Published As

Publication number Publication date
US20210285075A1 (en) 2021-09-16
EP3472364A1 (en) 2019-04-24
EP3287535A1 (en) 2018-02-28

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