EP1327006B1 - Austenitic nickel/chrome/cobalt/molybdenum/tungsten alloy and use thereof - Google Patents

Austenitic nickel/chrome/cobalt/molybdenum/tungsten alloy and use thereof Download PDF

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EP1327006B1
EP1327006B1 EP01972053A EP01972053A EP1327006B1 EP 1327006 B1 EP1327006 B1 EP 1327006B1 EP 01972053 A EP01972053 A EP 01972053A EP 01972053 A EP01972053 A EP 01972053A EP 1327006 B1 EP1327006 B1 EP 1327006B1
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molybdenum
cobalt
chromium
max
nickel
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EP1327006A1 (en
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Ulrich Brill
Reinhard Weiss
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VDM Metals GmbH
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ThyssenKrupp VDM GmbH
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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
    • C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
    • 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

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  • the invention relates to an austenitic nickel-chromium-cobalt-molybdenum-tungsten alloy.
  • nickel based alloys are widely used in heat engines, e.g. Internal combustion engines, stationary and flying gas turbines because they are in the temperature range of 700 - 900 ° C with exceptionally good strength properties feature.
  • GB-A 929,687 a nickel-chromium-cobalt-molybdenum alloy, that by adding 2.0 - 3.5% titanium, 0 - 0.8% aluminum and 2 - 5.25% niobium for a significant increase in strength through ⁇ '- and ⁇ '' excretion will help.
  • Tungsten is used as a substitution element for molybdenum up to 10 Atomic% approved, tantalum is up to 3 wt .-% as a substitution element suggested by niobium.
  • GB-A 1,036,179 essentially describes only a limitation of the elements specified in GB-A 929,687, with the exception that Iron is no longer permitted as an alloying element.
  • a nickel-chromium-cobalt-molybdenum alloy is also disclosed in US Pat. No. 4,981,644 described by titanium, aluminum, niobium and tantalum is precipitation hardening, but with regard to the elements rhenium, Molybdenum and tungsten only have a total content of 1.0 - 8.5% prescribes.
  • WO-A 90/03450 describes a precipitation hardening alloy, at that compared to US-A 4,981,644 for the precipitation-hardening Elements Al, Ti, Nb and Ta not only have upper but also lower limits be specified; In contrast, rhenium, hafnium and vanadium are only used set with upper limit.
  • GB-A 1,336,409 describes a nickel-chromium-cobalt-molybdenum alloy, where the sum of the precipitation hardening elements Aluminum and titanium is limited to 0.8 - 2.1%.
  • tungsten is a nickel-chromium-molybdenum-cobalt alloy in US Pat. No. 4,877,461 with improved creep resistance described.
  • EP-B 0633 325 discloses an alloy based on US-A 4,877,461 for a nickel-chromium-cobalt-molybdenum alloy in addition to limiting aluminum and titanium to 0.5 - 2.0% by weight and the addition of max. 5% by weight of tungsten 0.7-2.5% by weight of tantalum as beneficial for strength.
  • a nickel-based alloy is known from US Pat. No. 5,017,249, which is said to be particularly suitable for use in turbines and engines. The same has (in percent by weight) about 18 to 25% Cr, up to 12% Mo, up to 15% W, up to 15% Co, up to 8% Fe, up to 3% Al, up to 5% Ti, approximately 0.04 to 0.15% C, up to 0.04% N, up to 0.02% B, about 0.05 to 0.75% Si, up to 0.5% Zr, balance Ni.
  • This alloy is also distinguished by the fact that a rectified recrystallized microstructure containing 0.5 to 3% M 6 C carbides with ⁇ 3 ⁇ m should be provided.
  • a nickel-chromium-cobalt-molybdenum alloy is disclosed in US Pat. No. 3,859,060 presented that are used as welding material in wire or strip form should arrive. The same contains (in percent by weight) about 20 to 24% Cr, about 0.8 to 1.5% Al, about 9.5 to 20% Co, about 7 to 12% Mo, max. 0.15% C, up to 0.6% Ti, up to 0.006% B, up to 0.1% Zr, up to 0.05% Mg, balance Ni. No tungsten is used in this alloy. In certain cases, small amounts of rare earths, such as Ce or La can be added in the form of mixed metals in contents up to 0.15%, to increase oxidation resistance.
  • rare earths such as Ce or La can be added in the form of mixed metals in contents up to 0.15%, to increase oxidation resistance.
  • nickel-chromium-cobalt-molybdenum alloys of the type mentioned at the beginning so that with sufficient resistance to oxidation, the values for warm and Creep rupture strength are improved so that the lifespan of from objects made of such alloys is significantly increased.
  • the material should be used as a formable and weldable wrought alloy his.
  • a preferred austenitic nickel-chromium-cobalt-molybdenum-tungsten alloy (in% by mass) has the following composition carbon 0.05 to 0.10% chrome 21 to 23% cobalt 12 to 13% molybdenum 10 to 11% aluminum 1.0 to 1.5% tungsten 5.1 to 7.0% yttrium 0.04 to 0.07% boron 0.001 to 0.005% titanium Max. 0.50% silicon Max. 0.50% iron Max. 2% manganese Max. 0.5% nickel rest including unavoidable melt-related contaminants.
  • the nickel-chromium-cobalt-molybdenum-tungsten alloy according to the invention in deviation from the previous state of the art, clearly shows more than 5 % By mass of tungsten and does not add tantalum Improvement of heat and creep rupture strength. Alloying 0.01 up to 0.10 mass% yttrium also improves the cyclic Oxidation resistance.
  • the objects mentioned can be derived from the invention Manufacture material easily, since it is not only well thermoformable, but also for cold processing operations - such as Cold rolling on thinner Dimensions, folding, deep drawing, flanging - the necessary forming capacity has.
  • FIGS. 1 to 4 show very clearly, on the basis of the lifetimes reached at 700 ° C., 750 ° C., 800 ° C. and 850 ° C. in the stress rupture test, the superiority of the alloys 1-4 according to the invention compared to the prior art representing alloys 5 - 7.
  • composition of alloys 1-7 is shown in Table 1 .

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Abstract

The invention relates to an austenitic nickel/chrome/cobalt/molybdenum/tungsten alloy, comprising (in mass %): carbon: 0.05 to 0.10%; chromium: 21 to 23%; cobalt: 10 to 15%; molybdenum: 10 to 11%; aluminium: 1.0 to 1.5%; tungsten: 5.1 to 8.0%; yttrium: 0.01 to 0.10%; boron: 0.001 to 0.010%; titanium: max. 0.50%; silicon: max. 0.50%; iron: max. 2%; manganese: max. 0.5%; nickel: remainder; including unavoidable impurities caused by the smelting process.

Description

Die Erfindung betrifft eine austenitische Nickel-Chrom-Cobalt-Molybdän-Wolfram-Legierung.The invention relates to an austenitic nickel-chromium-cobalt-molybdenum-tungsten alloy.

Es ist bekannt, dass Nickelbasislegierungen einen weitverbreiteten Einsatz in Wärmekraftmaschinen, wie z.B. Verbrennungsmotoren, stationären und fliegenden Gasturbinen finden, weil sie gerade im Temperaturbereich von 700 - 900 °C über außergewöhnlich gute Festigkeitseigenschaften verfügen.It is known that nickel based alloys are widely used in heat engines, e.g. Internal combustion engines, stationary and flying gas turbines because they are in the temperature range of 700 - 900 ° C with exceptionally good strength properties feature.

Viele dieser Legierungen enthalten nennenswerte Anteile an γ'- und γ"-Phasen, die entscheidend zur Festigkeitssteigerung im Temperaturbereich von 700 - 900 °C beitragen. Zur Ausscheidung der γ'- und γ''-Phasen werden meist die Legierungselemente Aluminium, Titan, Tantal und Niob genutzt.Many of these alloys contain significant amounts of γ'- and γ "phases, the crucial to increasing strength in the temperature range contribute from 700 - 900 ° C. For the elimination of the γ'- and γ '' phases are mostly the alloy elements aluminum, titanium, tantalum and niobium used.

So beschreibt z.B. die GB-A 929,687 eine Nickel-Chrom-Cobalt-Molybdän-Legierung, der durch Zusatz von 2,0 - 3,5 % Titan, 0 - 0,8 % Aluminium und 2 - 5,25 % Niob zu einer deutlichen Festigkeitssteigerung durch γ'- und γ''-Ausscheidung verholfen wird.For example, GB-A 929,687 a nickel-chromium-cobalt-molybdenum alloy, that by adding 2.0 - 3.5% titanium, 0 - 0.8% aluminum and 2 - 5.25% niobium for a significant increase in strength through γ'- and γ '' excretion will help.

Wolfram wird hierbei als Substitutionselement von Molybdän bis zu 10 Atom-% zugelassen, Tantal wird bis zu 3 Gew.-% als Substitutionselement von Niob vorgeschlagen.Tungsten is used as a substitution element for molybdenum up to 10 Atomic% approved, tantalum is up to 3 wt .-% as a substitution element suggested by niobium.

Die GB-A 1,036,179 beschreibt im Wesentlichen lediglich eine Eingrenzung der in der GB-A 929,687 angegebenen Elemente, mit der Ausnahme, dass Eisen als Legierungselement nicht mehr zugelassen ist. GB-A 1,036,179 essentially describes only a limitation of the elements specified in GB-A 929,687, with the exception that Iron is no longer permitted as an alloying element.

In der US-A 4,981,644 wird ebenfalls eine Nickel-Chrom-Cobalt-Molybdän-Legierung beschrieben, die durch Titan, Aluminium, Niob und Tantal ausscheidungshärtend ist, jedoch bezüglich der Elemente Rhenium, Molybdän und Wolfram nur einen Summengehalt von 1,0 - 8,5 % vorschreibt.A nickel-chromium-cobalt-molybdenum alloy is also disclosed in US Pat. No. 4,981,644 described by titanium, aluminum, niobium and tantalum is precipitation hardening, but with regard to the elements rhenium, Molybdenum and tungsten only have a total content of 1.0 - 8.5% prescribes.

Die WO-A 90/03450 beschreibt eine ausscheidungshärtende Legierung, bei der im Vergleich zur US-A 4,981,644 für die ausscheidungshärtenden Elemente Al, Ti, Nb und Ta nicht nur Ober-, sondern auch Untergrenzen angegeben werden; Rhenium, Hafnium und Vanadium werden dagegen nur mit Obergrenze eingestellt.WO-A 90/03450 describes a precipitation hardening alloy, at that compared to US-A 4,981,644 for the precipitation-hardening Elements Al, Ti, Nb and Ta not only have upper but also lower limits be specified; In contrast, rhenium, hafnium and vanadium are only used set with upper limit.

Der Wunsch, hochwarmfeste Legierungen auch als Knetlegierungen einsetzen zu können, d.h. zum Beispiel auch als Bleche, die umgeformt und gefügt werden können, führte zu den mischkristallverfestigten Legierungen, die nicht mehr als ca. 2 Gew.-% ausscheidungshärtende Elemente wie z.B. Aluminium, Titan und Niob enthalten.The desire to use high-temperature alloys as wrought alloys to be able to use, i.e. for example as sheets that are formed and can be added, led to the solidified alloys, the no more than about 2% by weight of precipitation hardening elements such as Contain aluminum, titanium and niobium.

So beschreibt die GB-A 1,336,409 eine Nickel-Chrom-Cobalt-Molybdän-Legierung, bei der die Summe an den ausscheidungshärtenden Elementen Aluminium und Titan auf 0,8 - 2,1 % begrenzt ist.GB-A 1,336,409 describes a nickel-chromium-cobalt-molybdenum alloy, where the sum of the precipitation hardening elements Aluminum and titanium is limited to 0.8 - 2.1%.

Auf ungefähr gleich hohem Niveau, nämlich 0,5 - 2,25 %, aber mit einem Zusatz von bis zu 5 % Wolfram wird in der US-A 4,877,461 eine Nickel-Chrom-Molybdän-Cobalt-Legierung mit verbesserter Zeitstandfestigkeit beschrieben.At about the same level, namely 0.5 - 2.25%, but with one The addition of up to 5% tungsten is a nickel-chromium-molybdenum-cobalt alloy in US Pat. No. 4,877,461 with improved creep resistance described.

Mit der EP-B 0633 325 wird eine Legierung offenbart, die aufbauend auf der US-A 4,877,461 für eine Nickel-Chrom-Cobalt-Molybdän-Legierung neben der Limitierung von Aluminium und Titan auf 0,5 - 2,0 Gew.-% und dem Zusatz von max. 5 Gew.-% Wolfram 0,7 - 2,5 Gew.-% Tantal als vorteilhaft für die Festigkeit ausweist.EP-B 0633 325 discloses an alloy based on US-A 4,877,461 for a nickel-chromium-cobalt-molybdenum alloy in addition to limiting aluminum and titanium to 0.5 - 2.0% by weight and the addition of max. 5% by weight of tungsten 0.7-2.5% by weight of tantalum as beneficial for strength.

Zwar ist es gelungen, durch die Absenkung von Aluminium und Titan auf 0,5 - 2,0 Gew.-% und den Zusatz von Wolfram und Tantal zu Nickel-Chrom-Cobalt-Molybdän-Legierungen warmfeste, umform- und fügbare Blechwerkstoffe herzustellen, dennoch blieb die erzielte Warmfestigkeit immer deutlich unter derjenigen der ausscheidungshärtenden Legierung zurück.Although it has succeeded in lowering aluminum and titanium 0.5 - 2.0% by weight and the addition of tungsten and tantalum to nickel-chromium-cobalt-molybdenum alloys heat-resistant, formable and joinable Manufacture of sheet materials, but the heat resistance achieved remained always well below that of the precipitation hardening alloy back.

Durch die US-A 5,017,249 ist eine Nickel-Basislegierung bekannt geworden, die insbesondere für den Einsatz in Turbinen und Motoren geeignet sein soll. Selbige weist ( in Gewichtsprozent) etwa 18 bis 25% Cr, bis zu 12 % Mo, bis zu 15 % W, bis zu 15% Co, bis zu 8% Fe, bis zu 3% Al, bis zu 5% Ti, etwa 0,04 bis 0,15% C, bis zu 0,04% N, bis zu 0,02% B, etwa 0,05 bis 0,75% Si, bis zu 0,5% Zr, Rest Ni auf. Diese Legierung zeichnet sich darüber hinaus aus, daß eine gleichgerichtete rekristallisierte Mikrostruktur, beinhaltend 0,5 bis 3% M6C Carbide mit < 3 µm gegeben sein soll.A nickel-based alloy is known from US Pat. No. 5,017,249, which is said to be particularly suitable for use in turbines and engines. The same has (in percent by weight) about 18 to 25% Cr, up to 12% Mo, up to 15% W, up to 15% Co, up to 8% Fe, up to 3% Al, up to 5% Ti, approximately 0.04 to 0.15% C, up to 0.04% N, up to 0.02% B, about 0.05 to 0.75% Si, up to 0.5% Zr, balance Ni. This alloy is also distinguished by the fact that a rectified recrystallized microstructure containing 0.5 to 3% M 6 C carbides with <3 μm should be provided.

In der US-A 3,859,060 wird eine Nickel-Chrom-Cobalt-Molybdän-Legierung vorgestellt, die als Schweißmaterial in Draht- oder Bandform zum Einsatz gelangen soll. Selbige beinhaltet (in Gewichtsprozent) etwa 20 bis 24% Cr, etwa 0,8 bis 1,5% Al, etwa 9,5 bis 20% Co, etwa 7 bis 12% Mo, max. 0,15% C, bis zu 0,6% Ti, bis zu 0,006% B, bis zu 0,1% Zr, bis zu 0,05% Mg, Rest Ni. In dieser Legierung kommt kein Wolfram zum Einsatz. In bestimmten Fällen können geringe Mengen an Seltenen Erden, wie Ce oder La in Form von Mischmetallen in Gehalten bis zu 0,15% zugesetzt werden, um die Oxidationsbeständigkeit zu erhöhen. A nickel-chromium-cobalt-molybdenum alloy is disclosed in US Pat. No. 3,859,060 presented that are used as welding material in wire or strip form should arrive. The same contains (in percent by weight) about 20 to 24% Cr, about 0.8 to 1.5% Al, about 9.5 to 20% Co, about 7 to 12% Mo, max. 0.15% C, up to 0.6% Ti, up to 0.006% B, up to 0.1% Zr, up to 0.05% Mg, balance Ni. No tungsten is used in this alloy. In In certain cases, small amounts of rare earths, such as Ce or La can be added in the form of mixed metals in contents up to 0.15%, to increase oxidation resistance.

Es ist daher die Aufgabe der vorliegenden Erfindung, Nickel-Chrom-Cobalt-Molybdän-Legierungen der eingangs genannten Art so auszugestalten, dass bei ausreichender Oxidationsbeständigkeit die Werte für die Warm- und Zeitstandfestigkeit so verbessert sind, dass die Lebensdauer von aus solchen Legierungen gefertigten Gegenständen deutlich erhöht wird. Der Werkstoff soll als umformbare und schweißbare Knetlegierung einsetzbar sein.It is therefore the object of the present invention, nickel-chromium-cobalt-molybdenum alloys of the type mentioned at the beginning so that with sufficient resistance to oxidation, the values for warm and Creep rupture strength are improved so that the lifespan of from objects made of such alloys is significantly increased. The The material should be used as a formable and weldable wrought alloy his.

Gelöst wird diese Aufgabe durch eine austenitische Nickel-Chrom-Cobalt-Molybdän-Wolfram-Legierung, wie sie in Anspruch 1 angegeben ist.This task is solved by an austenitic nickel-chromium-cobalt-molybdenum-tungsten alloy, as stated in claim 1.

Eine bevorzugte austenitische Nicket-Chrom-Cobalt-Molybdän-Wolfram-Legierung hat (in Masse- %) folgende Zusammensetzung Kohlenstoff 0,05 bis 0,10 % Chrom 21 bis 23 % Cobalt 12 bis 13 % Molybdän 10 bis 11 % Aluminium 1,0 bis 1,5 % Wolfram 5,1 bis 7,0 % Yttrium 0,04 bis 0,07 % Bor 0,001 bis 0,005 % Titan max. 0,50 % Silizium max. 0,50 % Eisen max. 2 % Mangan max. 0,5 % Nickel Rest einschließlich unvermeidbarer erschmelzungsbedingter Verunreinigungen.A preferred austenitic nickel-chromium-cobalt-molybdenum-tungsten alloy (in% by mass) has the following composition carbon 0.05 to 0.10% chrome 21 to 23% cobalt 12 to 13% molybdenum 10 to 11% aluminum 1.0 to 1.5% tungsten 5.1 to 7.0% yttrium 0.04 to 0.07% boron 0.001 to 0.005% titanium Max. 0.50% silicon Max. 0.50% iron Max. 2% manganese Max. 0.5% nickel rest including unavoidable melt-related contaminants.

Die erfindungsgemäße Nickel-Chrom-Cobalt-Molybdän-Wolfram-Legierung weist in Abkehr vom bisherigen Stand der Technik deutlich mehr als 5 Masse-% Wolfram auf und verzichtet auf den Zusatz von Tantal zur Verbesserung der Warm- und Zeitstandfestigkeit. Das Zulegieren von 0,01 bis 0,10 Masse-% Yttrium verbessert zudem die zyklische Oxidationsbeständigkeit.The nickel-chromium-cobalt-molybdenum-tungsten alloy according to the invention in deviation from the previous state of the art, clearly shows more than 5 % By mass of tungsten and does not add tantalum Improvement of heat and creep rupture strength. Alloying 0.01 up to 0.10 mass% yttrium also improves the cyclic Oxidation resistance.

Legierungen mit Zusätzen von nur bis zu 5 Masse-% Wolfram auch mit geringen Tantalzugaben schöpfen das durch Mischkristallhärtung zu erreichende Festigkeitspotential nicht aus. So erwiesen sich überraschender Weise, entgegen der Lehre von US-A 4,877,461 und EP-B 0633 325 Wolframgehalte über 5 % als eine sehr wirkungsvolle Möglichkeit der Festigkeitssteigerung. Der Zusatz von Wolfram ist allerdings bei gegebener Zusammensetzung begrenzt auf 8,0 Gew.-%, da bei höheren Gehalten die Warmformbarkeit nicht mehr gegeben ist.Alloys with additions of only up to 5% by mass of tungsten low tantalum additions result from mixed crystal hardening strength potential not reaching. So it turned out to be more surprising Way, contrary to the teaching of US-A 4,877,461 and EP-B 0633 325 Tungsten levels over 5% as a very effective way of Increase in strength. However, the addition of tungsten is given Composition limited to 8.0 wt .-%, because the higher the Thermoformability is no longer given.

Die erfindungsgemäße Nickel-Chrom-Cobalt-Molybdän-Wolfram-Legierung ist auf Grund ihrer exzellenten Zeitstandfestigkeit im Temperaturbereich von 700 - 900 °C besonders geeignet für Gegenstände wie z.B.

  • stationäre und fliegende Gasturbinen
  • Verbrennungskraftmaschinen
  • Komponenten in Dampfturbinen
  • Komponenten von fortschrittlichen GuD-Kraftwerken
  • Turboladern
  • HT-Ventilatoren.
The nickel-chrome-cobalt-molybdenum-tungsten alloy according to the invention is particularly suitable for objects such as, for example, owing to its excellent creep rupture strength in the temperature range from 700 to 900 ° C.
  • stationary and flying gas turbines
  • Internal Combustion Engines
  • Components in steam turbines
  • Components of advanced combined cycle power plants
  • turbochargers
  • HT fans.

Die genannten Gegenstände lassen sich aus dem erfindungsgemäßen Werkstoff leicht fertigen, da er nicht nur gut warmverformbar ist, sondern auch das für Kaltverarbeitungsvorgänge - wie z.B. Kaltwalzen auf dünnere Abmessungen, Abkanten, Tiefziehen, Bördeln - nötige Umformvermögen besitzt.The objects mentioned can be derived from the invention Manufacture material easily, since it is not only well thermoformable, but also for cold processing operations - such as Cold rolling on thinner Dimensions, folding, deep drawing, flanging - the necessary forming capacity has.

Auch das Fügen von größeren Komponenten ist auf Grund der guten Schweißeignung des Werkstoffes problemlos möglich.The joining of larger components is also due to the good ones Weldability of the material is possible without any problems.

Die Figuren 1 bis 4 zeigen sehr deutlich, anhand der bei 700 °C, 750 °C, 800 °C und 850 °C erreichten Lebensdauern im Stress-Rupture-Versuch, die Überlegenheit der erfindungsgemäßen Legierungen 1 - 4 gegenüber den den Stand der Technik repräsentierenden Legierungen 5 - 7. FIGS. 1 to 4 show very clearly, on the basis of the lifetimes reached at 700 ° C., 750 ° C., 800 ° C. and 850 ° C. in the stress rupture test, the superiority of the alloys 1-4 according to the invention compared to the prior art representing alloys 5 - 7.

Die Zusammensetzung der Legierungen 1 - 7 ist in Tabelle 1 dargestellt.The composition of alloys 1-7 is shown in Table 1 .

Um den negativen Einfluss des Wolframs auf die zyklische Oxidationsbeständigkeit nicht nur zu kompensieren, sondern um die zyklische Oxidationsbeständigkeit noch weiter zu verbessern, ist den erfindungsgemäßen Legierungen Yttrium zulegiert worden. Der erfindungsgemäße Gehalt von 0,01 bis 0,10 % ergibt sich aus dem Minimalgehalt von 0,01 %, der für einen sichtbaren Verbesserungseffekt überhaupt erforderlich ist, und dem mit 0,10 % festgelegten Maximalgehalt, jenseits dessen mit 'Overdoping' und damit wiederum einer Verschlechterung der zyklischen Oxidationsbeständigkeit zu rechnen ist.To the negative impact of tungsten on the cyclical Resistance to oxidation not only to compensate, but to to improve cyclic oxidation resistance even further Alloys according to the invention have been alloyed with yttrium. The inventive content of 0.01 to 0.10% results from the Minimum content of 0.01%, for a visible improvement effect is required at all, and the maximum salary set at 0.10%, beyond that with 'overdoping' and thus another A deterioration in the cyclical resistance to oxidation can be expected.

Bestätigt wird der positive Effekt des Yttriums durch den in den Figuren 5 - 6 dargestellten deutlich geringeren Massenzuwachs im zyklischen Oxidationsversuch bei 700 °C und 800 °C über eine Versuchszeit von mehr als 1.000 Stunden.

Figure 00080001
The positive effect of the yttrium is confirmed by the in Figures 5 - 6 shown significantly lower mass increase in cyclic oxidation test at 700 ° C and 800 ° C over a test period of more than 1,000 hours.
Figure 00080001

Claims (7)

  1. Austenitic nickel-chromium-cobalt-molybdenum-tungsten alloy composed of (in % by mass): carbon 0.05 to 0.10% chromium 21 to 23% cobalt 10 to 15% molybdenum 10 to 11% aluminium 1.0 to 1.5% tungsten 5.1 to 8.0% yttrium 0.01 to 0.10% boron 0.001 to 0.010% titanium max. 0.50% silicium max. 0.50% iron max. 2% manganese max. 0.5% nickel rest
    including unavoidable impurities resulting from the melting process.
  2. Austenitic nickel-chromium-cobalt-molybdenum-tungsten alloy according to claim 1 composed of (in % by mass): carbon 0.05 to 0.10% chromium 21 to 23% cobalt 12 to 13% molybdenum 10 to 11 % aluminium 1.0 to 1.5% tungsten 5.1 to 7.0% yttrium 0.04 to 0.07% boron 0.001 to 0.005% titanium max. 0.50% silicium max. 0.50% iron max. 2% manganese max. 0.5% nickel rest
    including unavoidable impurities resulting from the melting process.
  3. Use of an austenitic nickel-chromium-cobalt-molybdenum-tungsten alloy according to claim 1 or 2, in particular for combusters of stationary or flying gas turbines.
  4. Use of an austenitic nickel-chromium-cobalt-molybdenum-tungsten alloy according to claim 1 or 2, in particular for compressors and turbo-superchargers of combustion engines.
  5. Use of an austenitic nickel-chromium-cobalt-molybdenum-tungsten alloy according to claim 1 or 2 for steam turbines.
  6. Use of an austenitic nickel-chromium-cobalt-molybdenum-tungsten alloy according to claim 1 or 2, in particular for shafts, hubs and blades of high temperature ventilators.
  7. Use of an austenitic nickel-chromium-cobalt-molybdenum-tungsten alloy according to claim 1 or 2, for gas and steam turbine power stations, in particular combuster walls, blades, tubes, boiler walls, membrane walls or collectors.
EP01972053A 2000-10-20 2001-09-13 Austenitic nickel/chrome/cobalt/molybdenum/tungsten alloy and use thereof Expired - Lifetime EP1327006B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10052023A DE10052023C1 (en) 2000-10-20 2000-10-20 Austenitic nickel-chrome-cobalt-molybdenum-tungsten alloy and its use
DE10052023 2000-10-20
PCT/EP2001/010557 WO2002034955A1 (en) 2000-10-20 2001-09-13 Austenitic nickel/chrome/cobalt/molybdenum/tungsten alloy and use thereof

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EP1327006A1 EP1327006A1 (en) 2003-07-16
EP1327006B1 true EP1327006B1 (en) 2004-04-14

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JP (1) JP2004530789A (en)
KR (1) KR20030043991A (en)
AT (1) ATE264407T1 (en)
AU (1) AU2001291858A1 (en)
CA (1) CA2423932A1 (en)
DE (2) DE10052023C1 (en)
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Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090217537A1 (en) * 2008-02-29 2009-09-03 Macdonald Leo Spitz Novel advanced materials blades and cutting tools
DE102008047330B3 (en) * 2008-09-16 2009-07-23 Alstom Technology Ltd. Process for the factory prefabrication of a heat-treated steel nickel alloy serpentine pipe in sections and subsequent on-site assembly
DE102008047329B3 (en) * 2008-09-16 2009-07-23 Alstom Technology Ltd. Producing and mounting nickel alloy-based superheater tube coils, for steam generators, includes forming and hardening tubes in workshop before mounting and hardening weld seams on site
US20100272597A1 (en) * 2009-04-24 2010-10-28 L. E. Jones Company Nickel based alloy useful for valve seat inserts
US7789288B1 (en) * 2009-07-31 2010-09-07 General Electric Company Brazing process and material for repairing a component
DE102011013091A1 (en) * 2010-03-16 2011-12-22 Thyssenkrupp Vdm Gmbh Nickel-chromium-cobalt-molybdenum alloy
JP2015000998A (en) * 2013-06-14 2015-01-05 三菱日立パワーシステムズ株式会社 Ni-BASED FORGING ALLOY AND BOILER PIPING AND BOILER TUBE USING THE SAME
RU2567078C1 (en) * 2014-08-28 2015-10-27 Открытое акционерное общество Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" ОАО НПО "ЦНИИТМАШ" Cast work blade with monocrystal structure, heat resistant steel based on nickel to manufacture lock part of work blade and method of heat treatment of cast blade
DE102017007106B4 (en) 2017-07-28 2020-03-26 Vdm Metals International Gmbh High temperature nickel base alloy
RU208686U1 (en) * 2021-10-03 2021-12-29 Антон Владимирович Новиков Block of three hollow turbine guide vanes for gas turbine engines and power plants

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1210566B (en) * 1961-04-01 1966-02-10 Basf Ag Process for the production of a highly corrosion-resistant and heat-resistant nickel-chromium-molybdenum alloy with increased resistance to intergranular corrosion
BE787254A (en) * 1971-08-06 1973-02-05 Wiggin & Co Ltd Henry NICKEL-CHROME ALLOYS
BE788719A (en) * 1971-09-13 1973-01-02 Cabot Corp NICKEL-BASED ALLOY RESISTANT TO HIGH TEMPERATURES AND THERMALLY STABLE OXIDIZATION
US3907552A (en) * 1971-10-12 1975-09-23 Teledyne Inc Nickel base alloys of improved properties
US3871928A (en) * 1973-08-13 1975-03-18 Int Nickel Co Heat treatment of nickel alloys
US4400211A (en) * 1981-06-10 1983-08-23 Sumitomo Metal Industries, Ltd. Alloy for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking
US4981644A (en) * 1983-07-29 1991-01-01 General Electric Company Nickel-base superalloy systems
US4765956A (en) * 1986-08-18 1988-08-23 Inco Alloys International, Inc. Nickel-chromium alloy of improved fatigue strength
US4877461A (en) * 1988-09-09 1989-10-31 Inco Alloys International, Inc. Nickel-base alloy
US5017249A (en) * 1988-09-09 1991-05-21 Inco Alloys International, Inc. Nickel-base alloy

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WO2002034955A1 (en) 2002-05-02
CA2423932A1 (en) 2003-03-27
KR20030043991A (en) 2003-06-02
HUP0302641A2 (en) 2003-11-28
AU2001291858A1 (en) 2002-05-06
DE50102012D1 (en) 2004-05-19
EP1327006A1 (en) 2003-07-16
HUP0302641A3 (en) 2005-04-28
JP2004530789A (en) 2004-10-07
US20040101433A1 (en) 2004-05-27
DE10052023C1 (en) 2002-05-16
ATE264407T1 (en) 2004-04-15

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