EP0260465A1 - Oxide dispersion-strengthened nickel-base superalloy with improved corrosion resistance - Google Patents

Oxide dispersion-strengthened nickel-base superalloy with improved corrosion resistance Download PDF

Info

Publication number
EP0260465A1
EP0260465A1 EP87112012A EP87112012A EP0260465A1 EP 0260465 A1 EP0260465 A1 EP 0260465A1 EP 87112012 A EP87112012 A EP 87112012A EP 87112012 A EP87112012 A EP 87112012A EP 0260465 A1 EP0260465 A1 EP 0260465A1
Authority
EP
European Patent Office
Prior art keywords
oxide dispersion
corrosion resistance
improved corrosion
nickel
weight
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.)
Granted
Application number
EP87112012A
Other languages
German (de)
French (fr)
Other versions
EP0260465B1 (en
Inventor
Peter Jongenburger
Robert Dr. Singer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0260465A1 publication Critical patent/EP0260465A1/en
Application granted granted Critical
Publication of EP0260465B1 publication Critical patent/EP0260465B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
    • C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
    • C22C32/0026—Matrix based on Ni, Co, Cr or alloys thereof

Definitions

  • the invention relates to the further development of oxide dispersion-hardened nickel-based superalloys with overall optimal properties with regard to high-temperature strength, long-term stability and resistance to oxidation and corrosion in an aggressive atmosphere.
  • nickel-based alloys that contain finely divided dispersoids in the form of oxides. Most of the time, the latter are Y 2 D 3 particles.
  • oxide dispersion hardened alloys of this type is the nickel-base alloy of the following composition, available from INCO under the trade name MA 6000:
  • INCO has developed a new alloy to improve the anti-corrosion properties. It has the following composition:
  • This alloy which has higher Cr and Al contents compared to MA 6000, has improved corrosion resistance, but tends to become unstable due to the formation of brittle phases in certain temperature ranges, which deteriorate the mechanical properties.
  • the powder was comparatively coarse. Particles larger than 300 ⁇ m in diameter were retained using a sieve. The fractions below were used again.
  • the alloy powder was mixed with fine Y 2 O 3 powder with a maximum particle diameter of 1 ⁇ m and a maximum crystallite diameter of 100 nm. Then the powder mixture was mechanically alloyed in the attritor for 36 hours under an argon atmosphere.
  • the Attritor S-1 from Netzsch, Federal Republic of Germany had a volume of 3 liters and a filling of 12 kg steel balls. The capacity for the powder was 1 kg.
  • the resistance to oxidation and corrosion was better than that of the known alloy with the trade name MA 6000.
  • Samples with a smooth surface were subjected to a temperature cycle in air and the specific weight change per unit area was determined after 1000 cycles.
  • One cycle lasted approximately one hour: the test specimen was heated to a temperature of 1000 ° C. and left at this temperature for 1 hour. Then, it was cooled and reheated at a rate of 500 ° C / min, and so on.
  • the change in weight is a measure of the resistance to oxidation.
  • the change in weight was + 0.5 mg / cm 2 surface
  • the resistance to oxidation was determined by weight change as defined in Example I and was
  • the resistance to oxidation was determined by weight change as defined in Example I and was
  • the invention is not limited to the exemplary embodiments.
  • the alloys can preferably be within the following composition limits:
  • the alloys can also contain cobalt as an alloying element:
  • Cobalt increases strength and improves workability.
  • composition also proves to be advantageous:

Landscapes

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

Abstract

Oxyddispersionsgehärtete Superlegierung mit verbesserter Korrosions- und Oxydationsbeständigkeit auf der Basis von Nickel mit der nachfolgenden Zusammensetzung: Cr = 17 - 18 Gew.-%Al = 6 - 7 Gew.-%Mo = 2 - 2,5 Gew.-%W = 3 - 3,5 Gew.-%Ta = 2 - 2,5 Gew.-%Zr < 0,2 Gew.-%B < 0,02 Gew.-%C < 0,1 Gew.-%Y203 = 1 - 1,5 Gew.-%Ni = RestOxide dispersion hardened superalloy with improved corrosion and oxidation resistance based on nickel with the following composition: Cr = 17-18% by weight Al = 6-7% by weight Mo = 2-2.5% by weight W = 3 - 3.5% by weight Ta = 2 - 2.5% by weight Zr <0.2% by weight B <0.02% by weight C <0.1% by weight Y203 = 1 - 1.5% by weight Ni = balance

Description

Technisches Gebiet:Technical field:

  • Oxyddispersionsgehärtete Superlegierungen auf der Basis von Nickel, welche dank ihrer hervorragenden mechanischen Eigenschaften bei hohen Temperaturen beim Bau thermisch und mechanisch hochbeanspruchter thermischer Maschinen Verwendung finden. Bevorzugte Verwendung als Schaufelwerkstoffe für Gasturbinen.Oxide dispersion hardened superalloys based on nickel, which thanks to their excellent mechanical properties at high temperatures are used in the construction of thermally and mechanically highly stressed thermal machines. Preferred use as blade materials for gas turbines.

Die Erfindung bezieht sich auf die Weiterentwicklung von oxyddispersionsgehärteten Nickelbasis-Superlegierungen mit insgesamt optimalen Eigenschaften bezüglich Hochtemperaturfestigkeit, Langzeitstabilität und Widerstand gegen Oxydation und Korrosion in agressiver Atmosphäre.The invention relates to the further development of oxide dispersion-hardened nickel-based superalloys with overall optimal properties with regard to high-temperature strength, long-term stability and resistance to oxidation and corrosion in an aggressive atmosphere.

Insbesondere betrifft sie eine oxyddispersionsgehärtete Superlegierung mit verbesserter Korrosionsbeständigkeit auf der Basis von Nickel.In particular, it relates to an oxide dispersion hardened superalloy with improved corrosion resistance based on nickel.

Stand der Technik:State of the art:

Zum Stand der Technik wird folgende Literatur zitiert:

  • -G.H. Gessinger, Powder Metallurgy of Superalloys, Butterworths, London, 1984
  • -R.F. Singer and E. Arzt, To be published in: Conf. Proc. "High Temperature Materials for Gas Turbines", Liege, Belgium, Oktober 1986
  • -J.S. Benjamin, Metall. Trans., 1970, 1, 2943 - 2951.
The following literature is cited on the prior art:
  • -GH Gessinger, Powder Metallurgy of Superalloys, Butterworths, London, 1984
  • -RF Singer and E. Arzt, To be published in: Conf. Proc. "High Temperature Materials for Gas Turbines", Liege, Belgium, October 1986
  • -JS Benjamin, metal. Trans., 1970, 1, 2943-2951.

Im Verlauf der vergangenen Jahre ist eine neue Klasse von hochwarmfesten Superlegierungen, insbesondere für Bauteile thermischer Maschinen (Gasturbinenschaufeln) entwickelt worden. Es handelt sich um Nickelbasislegierungen, welche fein verteilte Dispersoide in Form von Oxyden enthalten. Meistens handelt es sich bei letzteren um Y2D3-Partikel. Eine der bekanntesten derartigen oxyddispersionsgehärteten Legierungen ist die von INCO unter dem Handelsnamen MA 6000 erhältliche Nickelbasislegierung folgender Zusammensetzung:

Figure imgb0001
Over the past few years, a new class of high-temperature super alloys has been developed, particularly for components of thermal machines (gas turbine blades). These are nickel-based alloys that contain finely divided dispersoids in the form of oxides. Most of the time, the latter are Y 2 D 3 particles. One of the best known oxide dispersion hardened alloys of this type is the nickel-base alloy of the following composition, available from INCO under the trade name MA 6000:
Figure imgb0001

(Vergl. H.F. Merrick, L.R. Curwick and Y.G. Kim, Nasa Report CR-135150, Contract NAS-3-19694, 1977, Cleveland, Ohio, USA und R.C. Benn, L.R. Curwick and G.A.J. Hack, Powder Met. 1981, No. 4, p. 191-195).(See HF Merrick, LR Curwick and YG Kim, Nasa Report CR-135150, Contract NAS-3-19694, 1977, Cleveland, Ohio, USA and RC Benn, LR Curwick and GAJ Hack, Powder Met. 1981, No. 4 , p. 191-195).

Obwohl diese Legierung bei hohen Temperaturen vorzügliche mechanische Eigenschaften hat, genügt sie im Hinblick auf Oxydations-und Sulfidationsbeständigkeit in zahlreichen Verwendungsfällen den Anforderungen des Betriebes nicht.Although this alloy has excellent mechanical properties at high temperatures, it does not meet the requirements of the company with regard to resistance to oxidation and sulfidation in numerous applications.

Um die Antikorrosionseigenschaften zu verbessern, hat INCO eine neue Legierung entwickelt. Sie hat folgende Zusammensetzung:

Figure imgb0002
Figure imgb0003
 INCO has developed a new alloy to improve the anti-corrosion properties. It has the following composition:
Figure imgb0002
Figure imgb0003

Diese, gegenüber MA 6000 erhöhte Cr-und AI-Gehalte aufweisende Legierung hat zwar verbesserte Korrosionsbeständigkeit, neigt aber durch Bildung spröder Phasen in bestimmten Temperaturbereichen zu Instabilitäten, welche die mechanischen Eigenschaften verschlechtern.This alloy, which has higher Cr and Al contents compared to MA 6000, has improved corrosion resistance, but tends to become unstable due to the formation of brittle phases in certain temperature ranges, which deteriorate the mechanical properties.

Darstellung der Erfindung:

  • Der Erfindung liegt die Aufgabe zugrunde, eine oxyddispersionsgehärtete Superlegierung auf der Basis von Nickel anzugeben, die bei Wahrung höchstmöglicher Warmfestigkeit, insbesondere Kriechgrenze, unter Vermeidung der Bildung von spröden Phasen eine erhöhte Beständigkeit gegen Sulfidation aufweist. Die Legierung soll langzeitstabil sein und sich auch im Verlaufe längerer Betriebsdauer nicht verändern.
Presentation of the invention:
  • The invention has for its object to provide an oxide dispersion-hardened superalloy based on nickel, which while maintaining the highest possible heat resistance, in particular creep limit, while avoiding the formation of brittle phases, has an increased resistance to sulfidation. The alloy should be stable over the long term and should not change even over a long period of operation.

Diese Aufgabe wird dadurch gelöst, dass die eingangs erwähnte Superlegierung auf Nickelbasis die nachfolgende Zusammensetzung aufweist:

Figure imgb0004
Weg zur Ausführung der Erfindung:This object is achieved in that the nickel-based superalloy mentioned at the outset has the following composition:
Figure imgb0004
 Way of carrying out the invention:

Die Erfindung wird anhand der nachfolgenden Ausführungsbeispiele erläutert.The invention is explained using the following exemplary embodiments.

Ausführungsbeispiel 1:Example 1:

Es wurde eine Legierung der nachfolgenden Zusammensetzung hergestellt:

Figure imgb0005
An alloy of the following composition was produced:
Figure imgb0005

Zunächst wurde eine Schmelze obiger Zusammensetzung, jedoch ohne Y203 satz hergestellt und durch Gaszerstäubung mittels Argon unter hohem Druck in ein Pulver übergeführt. Das Pulver war vergleichsweise grobkörnig. Partikel von über 300 um Durchmesser wurden mittels Sieb zurückgehalten. Die darunter liegenden Fraktionen wurden weiter verwendet. Das Legierungspulver wurde mit feinem Y2O3-Pulver mit maximalem Partikeldurchmesser von 1 u.m bei maximalem Kristallitdurchmesser von 100 nm gemischt. Dann wurde die Pulvermischung während 36 h unter Argonatmosphäre im Attritor mechanisch legiert. Der Attritor S-1, Fa. Netzsch, Bundesrepublik Deutschland hatte 3 Liter Inhalt und eine Füllung von 12 kg Stahlkugeln. Die Kapazität für das Pulver betrug 1 kg.First, a melt of the above composition, but without the Y 2 0 3 set, was produced and converted into a powder by gas atomization using argon under high pressure. The powder was comparatively coarse. Particles larger than 300 µm in diameter were retained using a sieve. The fractions below were used again. The alloy powder was mixed with fine Y 2 O 3 powder with a maximum particle diameter of 1 μm and a maximum crystallite diameter of 100 nm. Then the powder mixture was mechanically alloyed in the attritor for 36 hours under an argon atmosphere. The Attritor S-1, from Netzsch, Federal Republic of Germany had a volume of 3 liters and a filling of 12 kg steel balls. The capacity for the powder was 1 kg.

Das mechanisch legierte Pulver wurde nun in eine Dose aus weichem Stahl von 73 mm Aussendurchmesser und 75 mm Höhe abgefüllt. Das Ganze-wurde unter Vakuum auf 300°C erhitzt und die Dose luftdicht verschweisst. Nun wurde das eingekapselte Pulver in einer Strangpresse bei einer Temperatur von 975°C zu einer Stange verpresst. Diese hatte einen Durchmesser von ca. 19,5 mm (Reduktionsverhältnis der Strangpresse = 14:1). Die Stahloberflächenschicht wurde durch Abdrehen entfernt, so dass die Stange schliesslich einen Durchmesser von 18 mm aufwies. Die Stange wurde nun einem Zonenglühprozess unterworfen.The mechanically alloyed powder was then filled into a can made of soft steel with an outside diameter of 73 mm and a height of 75 mm. The whole thing was heated to 300 ° C. under vacuum and the can was sealed airtight. The encapsulated powder was then pressed into a rod in an extruder at a temperature of 975 ° C. This had a diameter of approx. 19.5 mm (reduction ratio of the extrusion press = 14: 1). The steel surface layer was removed by twisting, so that the rod finally had a diameter of 18 mm. The rod has now been subjected to a zone annealing process.

Mit einem Temperaturgradienten, welcher den Wert von 8°C/mm überstieg, wurden längsgerichtete Körner mit einem Längen-zu Breitenverhältnis von mehr als 10 erreicht.With a temperature gradient exceeding 8 ° C / mm, longitudinal grains with a length to width ratio of more than 10 were achieved.

Die mechanischen Eigenschaften wurden untersucht. Insbesondere wurde die Zeitstandfestigkeit (Kriechgrenze) für eine Zeitdauer von 5 • 104 h bei verschiedenen Temperaturen gemessen. Die Werte betrugen:

Figure imgb0006
The mechanical properties were examined. In particular, the creep rupture strength (creep limit) was measured for a period of 5 • 10 4 h at different temperatures. The values were:
Figure imgb0006

Der Oxydations-und Korrosionswiderstand war besser als derjenige der bekannten Legierung mit dem Handelsnamen MA 6000.The resistance to oxidation and corrosion was better than that of the known alloy with the trade name MA 6000.

Es wurden Proben mit glatter Oberfläche einem Temperaturzyklus in Luft unterworfen und die spezifische Gewichtsveränderung per Flächeneinheit nach 1000 Zyklen bestimmt. Ein Zyklus dauerte ungefähr eine Stunde: Der Probekörper wurde auf eine Temperatur von 1000 °C aufgeheizt und während 1h bei dieser Temperatur belassen. Dann wurde er mit einer Geschwindigkeit von 500 °C/min abgekühlt und wieder erhitzt, und so fort. Die Gewichtsveränderung ist ein Mass für die Oxydationsbeständigkeit.Samples with a smooth surface were subjected to a temperature cycle in air and the specific weight change per unit area was determined after 1000 cycles. One cycle lasted approximately one hour: the test specimen was heated to a temperature of 1000 ° C. and left at this temperature for 1 hour. Then, it was cooled and reheated at a rate of 500 ° C / min, and so on. The change in weight is a measure of the resistance to oxidation.

Im vorliegenden Fall betrug die Gewichtsveränderung + 0,5 mg/cm2 OberflächeIn the present case, the change in weight was + 0.5 mg / cm 2 surface

Im Vergleich die Legierung MA 6000 -10,5 mg/cm2In comparison, the alloy MA 6000 -10.5 mg / cm2

Ausführungsbeispiel II:Working example II:

Es wurde eine Legierung der nachfolgenden Zusammensetzung hergestellt.

Figure imgb0007
An alloy of the following composition was produced.
Figure imgb0007

Die Pulverherstellung und die Weiterverarbeitung erfolgte nach den unter Beispiel angegebenen Verfahrensschritten.The powder production and further processing took place according to the process steps given under example.

Die an Proben gemessene Zeitstandfestigkit (Kriechgrenze) für eine Zeitdauer von 5.104 h betrug in Funktion der Temperatur:

Figure imgb0008
The creep rupture strength measured on samples (creep limit) for a period of 5.10 4 h was as a function of temperature:
Figure imgb0008

Die Oxydationsbeständigkeit wurde durch Gewichtsveränderung gemäss Definition in Beispiel I bestimmt und betrugThe resistance to oxidation was determined by weight change as defined in Example I and was

+ 0,5 mg/cm2 Oberfläche.+ 0.5 mg / cm 2 surface.

Ausführungsbeispiel III:Working example III:

Es wurde eine Legierung der nachfolgenden Zusammensetzung hergestellt:

Figure imgb0009
An alloy of the following composition was produced:
Figure imgb0009

Die Pulverherstellung und die Weiterverarbeitung erfolgte nach den unter Beispiel I angegebenen Verfahrensschritten.The powder production and further processing took place according to the process steps given in Example I.

Die an Proben gemessene Zeitstandfestigkeit (Kriechgrenze) für eine Zeitdauer von 5•104 h betrug in Funktion der Temperatur:

Figure imgb0010
The creep rupture strength measured on samples for a period of 5 • 10 4 h as a function of temperature was:
Figure imgb0010

Die Oxydationsbeständigkeit wurde durch Gewichtsveränderung gemäss Definition in Beispiel I bestimmt und betrugThe resistance to oxidation was determined by weight change as defined in Example I and was

+ 0,4 mg/cm2 Oberfläche.+ 0.4 mg / cm 2 surface.

Die Erfindung ist nicht auf die Ausführungsbeispele beschränkt. Vorzugsweise können die Legierungen im Rahmen der nachfolgenden Zusammensetzungsgrenzen liegen:

Figure imgb0011
The invention is not limited to the exemplary embodiments. The alloys can preferably be within the following composition limits:
Figure imgb0011

Eine weitere vorteilhafte Gruppe mit Hafniumzusatz hat die nachfolgende Zusammensetzung:

Figure imgb0012
Figure imgb0013
 Another advantageous group with hafnium addition has the following composition:
Figure imgb0012
Figure imgb0013

Das Hafnium verbessert insbesondere die Querfestigkeit. Die Legierungen konnen gemäss nachfolgender Darstellung auch Kobalt als Legierungselement enthalten:

Figure imgb0014
The hafnium improves cross-strength in particular. As shown below, the alloys can also contain cobalt as an alloying element:
Figure imgb0014

Kobalt steigert die Festigkeit und verbessert die Verarbeitbarkeit.Cobalt increases strength and improves workability.

Insbesondere erweist sich auch die nachfolgende Zusammensetzung als vorteilhaft:

Figure imgb0015
In particular, the following composition also proves to be advantageous:
Figure imgb0015

Claims (7)

1. Oxyddispersionsgehärtete Superlegierung mit verbesserter Korrosionsbeständigkeit auf der Basis von Nickel, dadurch gekennzeichnet, dass sie die nachfolgende Zusammensetzung aufweist:
Figure imgb0016
 1. Oxide dispersion hardened superalloy with improved corrosion resistance based on nickel, characterized in that it has the following composition:
Figure imgb0016
 2. Oxyddispersionsgehärtete Superlegierung mit verbesserter Korrosionsbeständigkeit auf der Basis von Nickel, dadurch gekennzeichnet, dass sie die nachfolgende Zusammensetzung aufweist:
Figure imgb0017
Figure imgb0018
 2. Oxide dispersion hardened superalloy with improved corrosion resistance based on nickel, characterized in that it has the following composition:
Figure imgb0017
Figure imgb0018
 3. Oxyddispersionsgehärtete Superlegierung mit verbesserter Korrosionsbeständigkeit auf der Basis von Nickel, dadurch gekennzeichnet, dass sie die nachfolgende Zusammensetzung aufweist:
Figure imgb0019
 3. Oxide dispersion hardened superalloy with improved corrosion resistance based on nickel, characterized in that it has the following composition:
Figure imgb0019
 4. Oxyddispersionsgehärtete Superlegierung mit verbesserter Korrosionsbeständigkeit auf der Basis von Nickel, dadurch gekennzeichnet, dass sie die nachfolgende Zusammensetzung aufweist:
Figure imgb0020
 4. Oxide dispersion hardened superalloy with improved corrosion resistance based on nickel, characterized in that it has the following composition:
Figure imgb0020
 5. Oxyddispersionsgehärtete Superlegierung mit verbesserter Korrosionsbeständigkeit auf der Basis von Nickel, dadurch gekennzeichnet, dass sie die nachfolgende Zusammensetzung aufweist:
Figure imgb0021
 5. Oxide dispersion hardened superalloy with improved corrosion resistance based on nickel, characterized in that it has the following composition:
Figure imgb0021
 6. Oxyddispersionsgehärtete Superlegierung mit verbesserter Korrosionsbeständigkeit auf der Basis von Nickel, dadurch gekennzeichnet, dass sie die nachfolgende Zusammensetzung aufweist:
Figure imgb0022
 6. Oxide dispersion hardened superalloy with improved corrosion resistance based on nickel, characterized in that it has the following composition:
Figure imgb0022
 7. Oxyddispersionsgehärtete Superlegierung mit verbesserter Korrosionsbeständigkeit auf der Basis von Nickel, dadurch gekennzeichnet, dass sie die nachfolgende Zusammensetzung aufweist:
Figure imgb0023
Figure imgb0024
 7. Oxide dispersion hardened superalloy with improved corrosion resistance based on nickel, characterized in that it has the following composition:
Figure imgb0023
Figure imgb0024
EP87112012A 1986-09-08 1987-08-19 Oxide dispersion-strengthened nickel-base superalloy with improved corrosion resistance Expired - Lifetime EP0260465B1 (en)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=4259333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112012A Expired - Lifetime EP0260465B1 (en) 1986-09-08 1987-08-19 Oxide dispersion-strengthened nickel-base superalloy with improved corrosion resistance

Country Status (5)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0398121A1 (en) * 1989-05-16 1990-11-22 Asea Brown Boveri Ag Process for producing coarse columnar grains directionally oriented along their length in an oxide dispersion hardened nickel base superalloy
EP0488716A1 (en) * 1990-11-29 1992-06-03 Ngk Insulators, Ltd. Sintered metal bodies and manufacturing method therefor
EP0507364A1 (en) * 1991-03-30 1992-10-07 PM HOCHTEMPERATUR-METALL GmbH Oxide dispersion strengthened, precipitation hardenable nickel-chromium alloy
EP0525816A1 (en) * 1991-08-02 1993-02-03 Isover Saint-Gobain Method and apparatus for manufacturing mineral wool, and mineral wool produced thereby

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6412465B1 (en) 2000-07-27 2002-07-02 Federal-Mogul World Wide, Inc. Ignition device having a firing tip formed from a yttrium-stabilized platinum-tungsten alloy
JP2013181213A (en) * 2012-03-01 2013-09-12 Hokkaido Univ Oxide dispersion strengthening type nickel-based superalloy

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754902A (en) * 1968-06-05 1973-08-28 United Aircraft Corp Nickel base superalloy resistant to oxidation erosion
US3926568A (en) * 1972-10-30 1975-12-16 Int Nickel Co High strength corrosion resistant nickel-base alloy
US4386976A (en) * 1980-06-26 1983-06-07 Inco Research & Development Center, Inc. Dispersion-strengthened nickel-base alloy

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738817A (en) * 1968-03-01 1973-06-12 Int Nickel Co Wrought dispersion strengthened metals by powder metallurgy
US3728088A (en) * 1968-03-01 1973-04-17 Int Nickel Co Superalloys by powder metallurgy
US3776704A (en) * 1968-03-01 1973-12-04 Int Nickel Co Dispersion-strengthened superalloys
US3809545A (en) * 1969-08-25 1974-05-07 Int Nickel Co Superalloys by powder metallurgy
US3660049A (en) * 1969-08-27 1972-05-02 Int Nickel Co Dispersion strengthened electrical heating alloys by powder metallurgy
NL171309C (en) * 1970-03-02 1983-03-01 Hitachi Ltd METHOD FOR THE MANUFACTURE OF A SEMICONDUCTOR BODY FORMING A SILICONE DIOXIDE LAYER ON A SURFACE OF A SILICONE MONOCRYSTALLINE BODY
US3749612A (en) * 1971-04-06 1973-07-31 Int Nickel Co Hot working of dispersion-strengthened heat resistant alloys and the product thereof
US3743548A (en) * 1971-05-06 1973-07-03 Cabot Corp Dispersion hardened metals having improved oxidation characteristics at elevated temperature
US4080204A (en) * 1976-03-29 1978-03-21 Brunswick Corporation Fenicraly alloy and abradable seals made therefrom
JPS58193335A (en) * 1982-05-06 1983-11-11 Sumitomo Electric Ind Ltd Dispersion strengthened type nickel base heat resistant sintered alloy and preparation thereof
US4599214A (en) * 1983-08-17 1986-07-08 Exxon Research And Engineering Co. Dispersion strengthened extruded metal products substantially free of texture
US4631082A (en) * 1985-02-20 1986-12-23 Pfizer Hospital Products Group Inc. Cobalt-chromium superalloy

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754902A (en) * 1968-06-05 1973-08-28 United Aircraft Corp Nickel base superalloy resistant to oxidation erosion
US3926568A (en) * 1972-10-30 1975-12-16 Int Nickel Co High strength corrosion resistant nickel-base alloy
US4386976A (en) * 1980-06-26 1983-06-07 Inco Research & Development Center, Inc. Dispersion-strengthened nickel-base alloy

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, Band 100, Nr. 12, 19. März 1984, Seite 266, Zusammenfassung Nr. 90013s, Columbus, Ohio, US; & JP-A-58 193 335 (SUMITOMO ELECTRIC INDUSTRIES, LTD.) 11.11.1983 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0398121A1 (en) * 1989-05-16 1990-11-22 Asea Brown Boveri Ag Process for producing coarse columnar grains directionally oriented along their length in an oxide dispersion hardened nickel base superalloy
EP0488716A1 (en) * 1990-11-29 1992-06-03 Ngk Insulators, Ltd. Sintered metal bodies and manufacturing method therefor
US5427601A (en) * 1990-11-29 1995-06-27 Ngk Insulators, Ltd. Sintered metal bodies and manufacturing method therefor
EP0507364A1 (en) * 1991-03-30 1992-10-07 PM HOCHTEMPERATUR-METALL GmbH Oxide dispersion strengthened, precipitation hardenable nickel-chromium alloy
EP0525816A1 (en) * 1991-08-02 1993-02-03 Isover Saint-Gobain Method and apparatus for manufacturing mineral wool, and mineral wool produced thereby
WO1993002977A1 (en) * 1991-08-02 1993-02-18 Isover Saint-Gobain Method and apparatus for manufacturing mineral wood, and mineral wool produced thereby
US6158249A (en) * 1991-08-02 2000-12-12 Isover Saint-Gobain Apparatus for manufacturing mineral wool

Also Published As

Publication number Publication date
US4798625A (en) 1989-01-17
DE3775671D1 (en) 1992-02-13
NO873738L (en) 1988-03-09
EP0260465B1 (en) 1992-01-02
JP2630323B2 (en) 1997-07-16
JPS6369936A (en) 1988-03-30
NO873738D0 (en) 1987-09-07

Similar Documents

Publication Publication Date Title
DE69400848T2 (en) Titanium aluminide alloys with good creep resistance
DE69620998T2 (en) OXIDATION RESISTANT MOLYBENE ALLOY
DE102014001328B4 (en) Curing nickel-chromium-iron-titanium-aluminum alloy with good wear resistance, creep resistance, corrosion resistance and processability
EP0513407B1 (en) Method of manufacture of a turbine blade
DE3781394T2 (en) TITAN ALUMINUM ALLOY.
DE69734515T2 (en) SINTERED HARD ALLOY
US4464199A (en) Aluminum powder alloy product for high temperature application
DE69215404T2 (en) Microalloyed nial intermetallic compounds with improved ductility
JPS63157831A (en) Heat-resisting aluminum alloy
DE3887259T2 (en) Alloys containing gamma prime phase and process for their formation.
DE102014001330A1 (en) Curing nickel-chromium-cobalt-titanium-aluminum alloy with good wear resistance, creep resistance, corrosion resistance and processability
DE2445462B2 (en) Use of a nickel alloy
EP1015650B1 (en) Alloy based on titanium aluminides
DE102006035111B4 (en) Nickel-based alloy
DE69104507T2 (en) Valve of an internal combustion engine made of titanium alloy.
EP0260465B1 (en) Oxide dispersion-strengthened nickel-base superalloy with improved corrosion resistance
DE3784204T2 (en) THERMOMECHANICAL METHOD FOR PRODUCING A PERMANENTLY BREAK-RESISTANT NICKEL BASE ALLOY AND PRODUCT PRODUCED BY THE METHOD.
DE3782294T2 (en) DISPERSION-REINFORCED ALLOYS.
DE3013076A1 (en) SHOVEL FOR AN ADJUSTABLE TURBINE INLET GUIDE
EP0677355B1 (en) Brazing material
EP1341945B1 (en) Method for producing components with a high load capacity from tial alloys
DE2451697C2 (en) Process for the production of superalloys
EP0487276A1 (en) High temperature aluminum-base alloy
EP0425972B1 (en) Oxidation- and corrosion-resistant heat-resisting alloy, based on an intermetallic compound
EP0172852A1 (en) High temperature resistant molybdenum alloy.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB LI SE

17P Request for examination filed

Effective date: 19880715

17Q First examination report despatched

Effective date: 19900703

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB LI SE

REF Corresponds to:

Ref document number: 3775671

Country of ref document: DE

Date of ref document: 19920213

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19920831

Ref country code: CH

Effective date: 19920831

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EAL Se: european patent in force in sweden

Ref document number: 87112012.7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970716

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19970717

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19970724

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970826

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980820

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990430

EUG Se: european patent has lapsed

Ref document number: 87112012.7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990601

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST