EP2876177B1 - Material from laves phase and ferritic fe-al phase - Google Patents

Material from laves phase and ferritic fe-al phase Download PDF

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Publication number
EP2876177B1
EP2876177B1 EP13194100.7A EP13194100A EP2876177B1 EP 2876177 B1 EP2876177 B1 EP 2876177B1 EP 13194100 A EP13194100 A EP 13194100A EP 2876177 B1 EP2876177 B1 EP 2876177B1
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EP
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Prior art keywords
material according
phase
laves phase
laves
ferritic
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EP13194100.7A
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German (de)
French (fr)
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EP2876177A1 (en
Inventor
Wilfried Smarsly
Gerhard Sauthoff
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MTU Aero Engines AG
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MTU Aero Engines AG
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Priority to ES13194100.7T priority Critical patent/ES2634089T3/en
Priority to EP13194100.7A priority patent/EP2876177B1/en
Priority to US14/550,659 priority patent/US20150147220A1/en
Publication of EP2876177A1 publication Critical patent/EP2876177A1/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/02—Alloys based on vanadium, niobium, or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum

Definitions

  • the present invention relates to a material for components of turbomachines, in particular of stationary gas turbines and aircraft engines, which comprises at least one Laves phase and one ferritic phase with Fe and Al, as well as a corresponding component.
  • turbomachines such as stationary gas turbines or aircraft engines
  • components such as blades, disks and the like
  • turbomachinery which must withstand both the high temperatures and the aggressive environmental conditions in the operation of turbomachinery, and in particular at the partially prevailing high temperatures sufficient Must have strength and creep resistance.
  • various materials are known in the prior art, which meet the requirements together with suitable coatings.
  • the potential of previously used materials, such as iron and nickel - based alloys already largely exhausted, so that further efficiency gains for turbomachinery must be achieved, for example by higher working temperatures through novel materials.
  • Examples are in the DE 10 2005 061 790 A1 or the US 8,012,271 B2 described.
  • a material based on an iron-based alloy is proposed, which has intercalated Laves phases.
  • the iron-base alloy material is an iron-aluminum-chromium alloy
  • the Laves intermetallic phases are based on ternary systems containing the constituents iron, aluminum, niobium and / or tantalum.
  • Such materials have due to the ordered intermetallic phases, even at high temperatures high strengths, so they meet the requirements for the application for corresponding components in gas turbines at operating temperatures in the range of more than 730 ° C can meet.
  • the material should meet the other requirements for a high-temperature material for use in turbomachinery and components made of this material should be easy to manufacture.
  • the invention proposes a material which has fractions of a ferritic phase with iron and aluminum and at least one Laves phase, the proportion of the at least one Laves phase making up the largest proportion of the material.
  • the Laves phase (s) form the framework or matrix of the material and the incorporated ferritic phase serves to improve the ductility of the material, since the ferritic Fe - Al phase is less hard than the Laves. Phases are.
  • a material is proposed in which the largest proportion is formed by the hard and high-strength and heat-resistant Laves phases and a ferritic iron-aluminum phase and possibly further occurring phases have lower proportions of the material.
  • the material according to the invention contains 50 vol.% Or more Laves phase, in particular 60 vol.% Or more, preferably 70 vol.% Or more Laves phase, wherein only a single Laves phase can be present or several different Laves phases.
  • the Laves phases are intermetallic compounds according to the three structural types (MgCu 2 , MgZn 2 and MgNi 2 ), but the compounds given merely serve to describe the crystal structure but do not occur in this composition in the material according to the invention.
  • the Laves phases in the material according to the invention may in particular be ternary or multinary Laves phases which thus have at least three different components.
  • Multiphase Laves phases refer to Laves phases with four or more components.
  • the Laves phases may be a hexagonal intermetallic phase of composition MeMe ' 2 , where Me is metal.
  • Me Me
  • Me Me
  • quaternary or multinary Laves phases the composition is given by partial replacement of one of the components Me, Me' or Me".
  • the ternary Laves phase may be formed, in particular, on the basis of the ternary system FeTaAl, the Laves phase in particular comprising 15% by weight to 65% by weight of iron, 1% by weight to 15% by weight of aluminum and 0, 5 wt.% To 65 wt.% Tantalum may have.
  • the tantalum component in the ternary Laves phase can also be at least partially replaced by niobium, so that the Laves phase can also be formed by a quaternary system FeTaNbAl.
  • the ternary Laves phase may be formed on the basis of FeNbAl, such a ternary Laves phase in particular comprising 15% by weight to 65% by weight of iron, 1% by weight to 15% by weight of aluminum and 0 5% by weight to 55% by weight of niobium.
  • Laves phases based on ternary Laves phases may contain minor constituents of other elements present in the alloy, as described by the quaternary or multinary systems with sufficiently large proportions of such elements.
  • the Laves phases can also have chromium components, so that the described ternary Laves phases can be formed quaternary with a corresponding chromium component (FeCrTaAl or Fe-CrNbAl) or the Laves phase can be formed on the basis of a system FeCrAlTaNb. Chrome can at least partially replace the Fe content in these Laves phases.
  • the ferritic phase with iron and aluminum may be a cubic space-centered mixed crystal with aluminum and other alloying constituents.
  • the ferritic Fe-Al phase may additionally comprise chromium.
  • the material consists of 20 to 25 at.% Chromium, in particular 23 at.% Chromium, 5 to 35 at.% Aluminum, in particular 7 to 30 at.% Aluminum and 10 to 25 at.% Tantalum and / or niobium and Remaining iron and unavoidable impurities.
  • the corresponding material can be produced both by fusion metallurgy and by powder metallurgy.
  • alloy compositions are suitable for use: alloy Fe [At.%] Cr [At.%] Al [At.%] Ta [At.%] Nb [At.%] 1 40 23 27 10 0 2 40 23 27 7 3 3 40 23 27 3 7 4 40 23 27 0 10 5 60 23 7 10 0 6 60 23 7 7 3 7 60 23 7 3 7 8th 60 23 7 0 10 9 25 23 27 25 0 10 25 23 27 16 9 11 25 23 27 9 16 12 25 23 27 0 25 13 45 23 7 25 0 14 45 23 7 16 9 15 45 23 7 9 16 16 45 23 7 0 25
  • the proportions of aluminum, tantalum and niobium and correspondingly of iron can be varied, while for example a solid chromium content of the order of 23 at.% Can be provided. While the ratio of tantalum and niobium is set to values of 10 and 25 at.% Respectively, the aluminum content and, correspondingly, the iron content varies between a low aluminum content of the order of 7 at.% And a high aluminum content of the order of 27 at.%, so that correspondingly different iron contents are present. This makes it possible, in particular, to vary the ferritic Fe-Al-Cr phase and its properties, in particular with regard to ductility.

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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)

Description

GEBIET DER ERFINDUNGFIELD OF THE INVENTION

Die vorliegende Erfindung betrifft einen Werkstoff für Bauteile von Strömungsmaschinen, insbesondere von stationären Gasturbinen und Flugzeugtriebwerken, der zumindest eine Laves - Phase und eine ferritische Phase mit Fe und Al umfasst, sowie ein entsprechendes Bauteil.The present invention relates to a material for components of turbomachines, in particular of stationary gas turbines and aircraft engines, which comprises at least one Laves phase and one ferritic phase with Fe and Al, as well as a corresponding component.

STAND DER TECHNIKSTATE OF THE ART

In Strömungsmaschinen, wie stationären Gasturbinen oder Flugzeugtriebwerken, werden Bauteile, wie beispielsweise Schaufeln, Scheiben und dergleichen, eingesetzt, die sowohl den hohen Temperaturen als auch den aggressiven Umgebungsbedingungen beim Betrieb der Strömungsmaschinen widerstehen müssen, als auch insbesondere bei den teilweise herrschenden hohen Temperaturen eine ausreichende Festigkeit und Kriechbeständigkeit aufweisen müssen. Hierzu sind im Stand der Technik verschiedene Werkstoffe bekannt, die zusammen mit geeigneten Beschichtungen den Anforderungen genügen. Allerdings ist das Potential der bisher eingesetzten Werkstoffe, wie beispielsweise Eisen - und Nickel - Basis - Legierungen, bereits weitgehend ausgeschöpft, so dass weitere Effizienzsteigerungen für Strömungsmaschinen beispielsweise durch höhere Arbeitstemperaturen durch neuartige Werkstoffe erreicht werden müssen.In turbomachines, such as stationary gas turbines or aircraft engines, components, such as blades, disks and the like, are used, which must withstand both the high temperatures and the aggressive environmental conditions in the operation of turbomachinery, and in particular at the partially prevailing high temperatures sufficient Must have strength and creep resistance. For this purpose, various materials are known in the prior art, which meet the requirements together with suitable coatings. However, the potential of previously used materials, such as iron and nickel - based alloys, already largely exhausted, so that further efficiency gains for turbomachinery must be achieved, for example by higher working temperatures through novel materials.

So gibt es bereits Bestrebungen, Legierungen mit Partikeln aus Laves - Phasen zu verfestigen, welche aufgrund ihrer geordneten, intermetallischen Struktur günstige Festigkeitswerte auch bei hohen Einsatztemperaturen erwarten lassen.There are already efforts to solidify alloys with particles of Laves phases, which due to their ordered, intermetallic structure can be expected favorable strength values even at high operating temperatures.

Beispiele hierfür sind in der DE 10 2005 061 790 A1 bzw. der US 8,012,271 B2 beschrieben. Dort wird ein Werkstoff auf Basis einer Eisenbasislegierung vorgeschlagen, der intermetallische Laves - Phasen eingelagert hat. Bei dem Eisenbasislegierungswerkstoff handelt es sich um eine Eisen - Aluminium - Chrom - Legierung und die intermetallischen Laves - Phasen beruhen auf ternären Systemen mit den Bestandteilen Eisen, Aluminium, Niob und/oder Tantal. Derartige Werkstoffe weisen aufgrund der geordneten intermetallischen Phasen auch bei hohen Temperaturen hohe Festigkeiten auf, sodass sie die Anforderungen für die Anwendung bei entsprechenden Komponenten in Gasturbinen bei Betriebstemperaturen im Bereich von mehr als 730°C erfüllen können.Examples are in the DE 10 2005 061 790 A1 or the US 8,012,271 B2 described. There, a material based on an iron-based alloy is proposed, which has intercalated Laves phases. The iron-base alloy material is an iron-aluminum-chromium alloy, and the Laves intermetallic phases are based on ternary systems containing the constituents iron, aluminum, niobium and / or tantalum. Such materials have due to the ordered intermetallic phases, even at high temperatures high strengths, so they meet the requirements for the application for corresponding components in gas turbines at operating temperatures in the range of more than 730 ° C can meet.

Trotz der bereits bekannten Werkstoffe besteht weiterhin Bedarf, verbesserte Werkstoffe für den Einsatz in Gasturbinen bei Temperaturen oberhalb von 700°C bereitzustellen.Despite the materials already known, there is still a need to provide improved materials for use in gas turbines at temperatures above 700 ° C.

OFFENBARUNG DER ERFINDUNGDISCLOSURE OF THE INVENTION AUFGABE DER ERFINDUNGOBJECT OF THE INVENTION

Es ist deshalb Aufgabe der vorliegenden Erfindung, einen Werkstoff für Bauteile einer Gasturbine, insbesondere eines Flugzeugtriebwerks bereitzustellen, der insbesondere bei Temperaturen üben 700 °C eingesetzt werden kann und durch ein geringes spezifisches Gewicht sowohl zur Leistungssteigerung der Gasturbine, als auch zur Gewichtsreduktion insbesondere bei Flugzeugtriebwerken beiträgt. Gleichzeitig soll der Werkstoff den übrigen Anforderungen an einen Hochtemperaturwerkstoff für den Einsatz bei Strömungsmaschinen gerecht werden und Bauteile aus diesem Werkstoff sollen einfach hergestellt werden können.It is therefore an object of the present invention to provide a material for components of a gas turbine, in particular an aircraft engine, which can be used especially at temperatures practicing 700 ° C and a low specific weight both to increase the performance of the gas turbine, as well as for weight reduction, especially in aircraft engines contributes. At the same time the material should meet the other requirements for a high-temperature material for use in turbomachinery and components made of this material should be easy to manufacture.

TECHNISCHE LÖSUNGTECHNICAL SOLUTION

Diese Aufgabe wird gelöst durch einen Werkstoff mit den Merkmalen des Anspruchs 1 sowie durch Bauteile mit den Merkmalen des Anspruchs 15. Vorteilhafte Ausgestaltungen sind Gegenstand der abhängigen Ansprüche.This object is achieved by a material having the features of claim 1 and by components having the features of claim 15. Advantageous embodiments are the subject of the dependent claims.

Die Erfindung schlägt einen Werkstoff vor, der Anteile einer ferritischen Phase mit Eisen und Aluminium sowie mindestens einer Laves - Phase aufweist, wobei der Anteil der mindestens einen Laves - Phase den größten Anteil des Werkstoffs ausmacht. Mit anderen Worten, die Laves - Phase(n) bildet bzw. bilden das Gerüst bzw. die Matrix des Werkstoffs und die eingelagerte ferritische Phase dient zur Verbesserung der Duktilität des Werkstoffs, da die ferritische Fe - Al - Phase weniger hart als die Laves - Phasen sind. Somit wird also ein Werkstoff vorgeschlagen, bei dem der größte Anteil durch die harten und hochfesten sowie warmfesten Laves - Phasen gebildet wird und eine ferritische Eisen - Aluminium - Phase sowie möglicherweise weitere vorkommende Phasen geringere Anteile am Werkstoff aufweisen.The invention proposes a material which has fractions of a ferritic phase with iron and aluminum and at least one Laves phase, the proportion of the at least one Laves phase making up the largest proportion of the material. In other words, the Laves phase (s) form the framework or matrix of the material and the incorporated ferritic phase serves to improve the ductility of the material, since the ferritic Fe - Al phase is less hard than the Laves. Phases are. Thus, a material is proposed in which the largest proportion is formed by the hard and high-strength and heat-resistant Laves phases and a ferritic iron-aluminum phase and possibly further occurring phases have lower proportions of the material.

Der erfindungsgemäße Werkstoff enthält 50 vol.% oder mehr Laves - Phase, insbesondere 60 vol.% oder mehr, vorzugsweise 70 vol.% oder mehr Laves - Phase, wobei nur eine einzige Laves - Phase vorhanden sein kann oder mehrere verschiedene Laves - Phasen. Die Laves - Phasen sind intermetallische Verbindungen gemäß den drei Strukturtypen (MgCu2, MgZn2 und MgNi2), wobei die angegebenen Verbindungen lediglich zur Beschreibung der Kristallstruktur dienen jedoch nicht in dieser Zusammensetzung im erfindungsgemäßen Werkstoff vorkommen.The material according to the invention contains 50 vol.% Or more Laves phase, in particular 60 vol.% Or more, preferably 70 vol.% Or more Laves phase, wherein only a single Laves phase can be present or several different Laves phases. The Laves phases are intermetallic compounds according to the three structural types (MgCu 2 , MgZn 2 and MgNi 2 ), but the compounds given merely serve to describe the crystal structure but do not occur in this composition in the material according to the invention.

Die Laves - Phasen im erfindungsgemäßen Werkstoff können insbesondere ternäre oder multinäre Laves - Phasen sein, die somit mindestens drei unterschiedliche Komponenten aufweisen. Multinäre Laves - Phasen bezeichnen hierbei Laves - Phasen mit vier oder mehr Komponenten. Üblicherweise kann es sich bei den Laves - Phasen um eine hexagonale, intermetallische Phase der Zusammensetzung MeMe'2 handeln, wobei Me für Metall steht. Bei einer ternären Laves - Phase ist die Zusammensetzung durch Me(Me',Me") gegeben, während bei quaternäre oder multinären Laves - Phasen die Zusammensetzung durch teilweisen Ersatz einer der Bestandteile Me, Me' oder Me" gegeben ist.The Laves phases in the material according to the invention may in particular be ternary or multinary Laves phases which thus have at least three different components. Multiphase Laves phases refer to Laves phases with four or more components. Typically, the Laves phases may be a hexagonal intermetallic phase of composition MeMe ' 2 , where Me is metal. In a ternary Laves phase, the composition is given by Me (Me ', Me "), while in quaternary or multinary Laves phases, the composition is given by partial replacement of one of the components Me, Me' or Me".

Bei der vorliegenden Erfindung kann die ternäre Laves - Phase insbesondere auf Basis des ternären Systems FeTaAl gebildet sein, wobei die Laves - Phase insbesondere 15 Gew.% bis 65 Gew.% Eisen, 1 Gew.% bis 15 Gew.% Aluminium und 0,5 Gew.% bis 65 Gew.% Tantal aufweisen kann. Der Tantal - Anteil bei der ternären Laves - Phase kann auch zumindest teilweise durch Niob ersetzt sein, so dass die Laves - Phase auch durch ein quaternäres System FeTaNbAl gebildet sein kann.In the present invention, the ternary Laves phase may be formed, in particular, on the basis of the ternary system FeTaAl, the Laves phase in particular comprising 15% by weight to 65% by weight of iron, 1% by weight to 15% by weight of aluminum and 0, 5 wt.% To 65 wt.% Tantalum may have. The tantalum component in the ternary Laves phase can also be at least partially replaced by niobium, so that the Laves phase can also be formed by a quaternary system FeTaNbAl.

Bei einer vollständigen oder nahezu vollständigen Ersetzung kann die ternäre Laves - Phase auf Basis FeNbAl gebildet sein, wobei eine derartige ternäre Laves - Phase insbesondere 15 Gew.% bis 65 Gew.% Eisen, 1 Gew.% bis 15 Gew.% Aluminium und 0,5 Gew.% bis 55 Gew.% Niob aufweisen kann.In the case of a complete or almost complete replacement, the ternary Laves phase may be formed on the basis of FeNbAl, such a ternary Laves phase in particular comprising 15% by weight to 65% by weight of iron, 1% by weight to 15% by weight of aluminum and 0 5% by weight to 55% by weight of niobium.

Bei den Laves - Phasen auf Basis ternäraren Laves - Phasen können geringe Bestandteile weiterer in der Legierung vorhandener Elemente enthalten sein, wie dies durch die quaternären oder multinären Systeme bei ausreichend großen Anteilen derartiger Elemente beschrieben ist.The Laves phases based on ternary Laves phases may contain minor constituents of other elements present in the alloy, as described by the quaternary or multinary systems with sufficiently large proportions of such elements.

Die Laves - Phasen können auch Chrom - Anteile aufweisen, so dass die beschriebenen ternären Laves - Phasen quaternär mit einem entsprechenden Chrom - Anteil (FeCrTaAl oder Fe-CrNbAl) ausgebildet sein können oder die Laves - Phase kann auf Basis eines Systems FeCrAlTaNb gebildet sein. Chrom kann bei diesen Laves - Phasen zumindest teilweise den Fe - Anteil ersetzen.The Laves phases can also have chromium components, so that the described ternary Laves phases can be formed quaternary with a corresponding chromium component (FeCrTaAl or Fe-CrNbAl) or the Laves phase can be formed on the basis of a system FeCrAlTaNb. Chrome can at least partially replace the Fe content in these Laves phases.

Bei der ferritischen Phase mit Eisen und Aluminium kann es sich um einen kubischraumzentrierten Mischkristall mit Aluminium und weiteren Legierungsbestandteilen handeln. Insbesondere kann die ferritische Fe - Al - Phase zusätzlich Chrom aufweisen.The ferritic phase with iron and aluminum may be a cubic space-centered mixed crystal with aluminum and other alloying constituents. In particular, the ferritic Fe-Al phase may additionally comprise chromium.

Erfindungsgemäß besteht der Werkstoff aus 20 bis 25 at.% Chrom, insbesondere um 23 at.% Chrom, 5 bis 35 at.% Aluminium, insbesondere 7 bis 30 at.% Aluminium und 10 bis 25 at.% Tantal und/oder Niob sowie Rest Eisen und unvermeidbare Verunreinigungen.According to the invention, the material consists of 20 to 25 at.% Chromium, in particular 23 at.% Chromium, 5 to 35 at.% Aluminum, in particular 7 to 30 at.% Aluminum and 10 to 25 at.% Tantalum and / or niobium and Remaining iron and unavoidable impurities.

Der entsprechende Werkstoff kann sowohl schmelzmetallurgisch als auch pulvermetallurgisch hergestellt werden.The corresponding material can be produced both by fusion metallurgy and by powder metallurgy.

AUSFÜHRUNGSBEISPIELEEMBODIMENTS

Weitere Vorteile, Kennzeichen und Merkmale der vorliegenden Erfindung werden bei der nachfolgenden Beschreibung detaillierter Ausführungsbeispiele deutlich. Allerdings ist die Erfindung nicht auf diese Ausführungsbeispiele beschränkt.Further advantages, characteristics and features of the present invention will become apparent in the following description of detailed embodiments. However, the invention is not limited to these embodiments.

Für einen Einsatz bieten sich beispielsweise folgende Legierungszusammensetzungen an: Legierung Fe [At.%] Cr [At.%] Al [At.%] Ta [At.%] Nb [At.%] 1 40 23 27 10 0 2 40 23 27 7 3 3 40 23 27 3 7 4 40 23 27 0 10 5 60 23 7 10 0 6 60 23 7 7 3 7 60 23 7 3 7 8 60 23 7 0 10 9 25 23 27 25 0 10 25 23 27 16 9 11 25 23 27 9 16 12 25 23 27 0 25 13 45 23 7 25 0 14 45 23 7 16 9 15 45 23 7 9 16 16 45 23 7 0 25 For example, the following alloy compositions are suitable for use: alloy Fe [At.%] Cr [At.%] Al [At.%] Ta [At.%] Nb [At.%] 1 40 23 27 10 0 2 40 23 27 7 3 3 40 23 27 3 7 4 40 23 27 0 10 5 60 23 7 10 0 6 60 23 7 7 3 7 60 23 7 3 7 8th 60 23 7 0 10 9 25 23 27 25 0 10 25 23 27 16 9 11 25 23 27 9 16 12 25 23 27 0 25 13 45 23 7 25 0 14 45 23 7 16 9 15 45 23 7 9 16 16 45 23 7 0 25

Wie die Tabelle der Ausführungsbeispiele zeigt, können insbesondere die Anteile an Aluminium, Tantal und Niob sowie entsprechend von Eisen variiert werden, während beispielsweise ein fester Chromgehalt in der Größenordnung von 23 at.% vorgesehen werden kann. Während der Anteil von Tantal und Niob in Summe auf Werte von 10 bzw. 25 At.% eingestellt wird, variiert der Aluminiumgehalt und entsprechend der Eisengehalt zwischen einem niedrigen Aluminiumgehalt in der Größenordnung von 7 at.% und einem hohen Aluminiumgehalt in der Größenordnung von 27 at.%, sodass entsprechend unterschiedliche Eisengehalte vorliegen. Dadurch lässt sich insbesondere die ferritische Fe - Al - Cr - Phase und deren Eigenschaften insbesondere hinsichtlich der Duktilität variieren.As the table of the embodiments shows, in particular the proportions of aluminum, tantalum and niobium and correspondingly of iron can be varied, while for example a solid chromium content of the order of 23 at.% Can be provided. While the ratio of tantalum and niobium is set to values of 10 and 25 at.% Respectively, the aluminum content and, correspondingly, the iron content varies between a low aluminum content of the order of 7 at.% And a high aluminum content of the order of 27 at.%, so that correspondingly different iron contents are present. This makes it possible, in particular, to vary the ferritic Fe-Al-Cr phase and its properties, in particular with regard to ductility.

Claims (15)

  1. A material for components of a gas turbine, in particular an aircraft engine,
    comprising amounts of a ferritic phase with Fe and Al and amounts of at least one Laves phase,
    characterized in that
    the material consists of 20 to 25 at.% Cr, 5 to 35 at.% Al, and 10 to 25 at.% tantalum and/or niobium, the remainder being Fe and unavoidable impurities,
    wherein the amount of the at least one Laves phase constitutes the largest amount of the material, namely greater than or equal to 50 vol.%.
  2. The material according to claim 1,
    characterized in that
    the amount of the at least one Laves phase is greater than or equal to 60 vol.%, preferably greater than or equal to 70 vol.%.
  3. The material according to one of the preceding claims,
    characterized in that
    the Laves phase is a ternary or multinary Laves phase.
  4. The material according to claim 3,
    characterized in that
    the ternary or multinary Laves phase is formed on the basis of FeTaAl.
  5. The material according to claim 4,
    characterized in that
    the Laves phase based on FeTaAl additionally comprises Nb, which partially replaces Ta.
  6. The material according to claim 3,
    characterized in that
    the ternary or multinary Laves phase is formed on a basis of FeNbAl.
  7. The material according to claim 6,
    characterized in that
    the Laves phase based on FeNbAl additionally comprises Ta, which partially replaces Nb.
  8. The material according to one of the preceding claims,
    characterized in that
    the Laves phase contains Cr, which in particular partially replaces Fe.
  9. The material according to one of the preceding claims,
    characterized in that
    the Laves phase is formed on a basis of FeCrAlTaNb.
  10. The material according to one of the preceding claims,
    characterized in that
    the ferritic phase additionally comprises Cr.
  11. The material according to one of the preceding claims,
    characterized In that
    in the material structure the at least one Laves phase forms a matrix or a skeleton into which the ferritic phase is incorporated,
  12. The material according to one of the preceding claims,
    characterized in that
    the material has about 23 at.% Cr.
  13. The material according to one of the preceding claims,
    characterized in that
    the material has 7 to 30 at.% Al.
  14. The material according to one of the preceding claims,
    characterized in that
    the material is produced by melt metallurgy or by powder metallurgy.
  15. A component of a gas turbine, in particular an aircraft engine, comprising a material according to one of the preceding claims.
EP13194100.7A 2013-11-22 2013-11-22 Material from laves phase and ferritic fe-al phase Not-in-force EP2876177B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES13194100.7T ES2634089T3 (en) 2013-11-22 2013-11-22 Material consisting of Laves phase and Ferritic Fe-Al phase
EP13194100.7A EP2876177B1 (en) 2013-11-22 2013-11-22 Material from laves phase and ferritic fe-al phase
US14/550,659 US20150147220A1 (en) 2013-11-22 2014-11-21 MATERIAL OF LAVES PHASE AND FERRITIC Fe-Al PHASE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13194100.7A EP2876177B1 (en) 2013-11-22 2013-11-22 Material from laves phase and ferritic fe-al phase

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EP2876177A1 EP2876177A1 (en) 2015-05-27
EP2876177B1 true EP2876177B1 (en) 2017-07-12

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US (1) US20150147220A1 (en)
EP (1) EP2876177B1 (en)
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US20040011435A1 (en) * 2002-07-17 2004-01-22 Wu James B. C. Wear-resistant, corrosion-resistant cobalt-based alloys
DE102005061790A1 (en) 2005-12-23 2007-07-05 Mtu Aero Engines Gmbh Material for component of gas turbine comprises matrix based on iron alloy with intermetallic material of Laves phase
DE102009039552B4 (en) * 2009-09-01 2011-05-26 Thyssenkrupp Vdm Gmbh Process for producing an iron-chromium alloy

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EP2876177A1 (en) 2015-05-27
US20150147220A1 (en) 2015-05-28

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