EP0410252A1 - Oxydations- und korrosionsbeständige Hochtemperaturlegierung hoher Zähigkeit bei Raumtemperatur für gerichtete Erstarrung auf der Basis einer intermetallischen Verbindung des Typs Nickelaluminid - Google Patents

Oxydations- und korrosionsbeständige Hochtemperaturlegierung hoher Zähigkeit bei Raumtemperatur für gerichtete Erstarrung auf der Basis einer intermetallischen Verbindung des Typs Nickelaluminid Download PDF

Info

Publication number
EP0410252A1
EP0410252A1 EP90113560A EP90113560A EP0410252A1 EP 0410252 A1 EP0410252 A1 EP 0410252A1 EP 90113560 A EP90113560 A EP 90113560A EP 90113560 A EP90113560 A EP 90113560A EP 0410252 A1 EP0410252 A1 EP 0410252A1
Authority
EP
European Patent Office
Prior art keywords
oxidation
room temperature
intermetallic compound
directional solidification
temperature alloy
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.)
Ceased
Application number
EP90113560A
Other languages
German (de)
English (en)
French (fr)
Inventor
Mohamed Dr. Nazmy
Markus Staubli
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.)
ABB Asea Brown Boveri Ltd
ABB AB
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Publication of EP0410252A1 publication Critical patent/EP0410252A1/de
Ceased legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel

Definitions

  • High-temperature alloys with high resistance to oxidation and corrosion based on intermetallic compounds which are suitable for directional solidification and complement conventional nickel-based superalloys.
  • the invention relates to the further development and improvement of the alloys based on the intermetallic compound Ni3Al with further additives which increase the heat resistance and the resistance to oxidation.
  • the intermetallic compound Ni3Al has some interesting properties that make it appear attractive as a construction material in the medium temperature range. Among other things, this includes their low density compared to super alloys. However, their technical usability in the present form is opposed to their brittleness and their insufficient corrosion resistance. The former can be improved by adding boron, but also higher strength values can be achieved (comp. CTLiu et al, "Nickel Aluminides for structural use", Journal of Metals, May 1986, pp. 19-21). Nonetheless, this method, even when using high cooling speeds in the production of tapes, has not given any practical results.
  • the corrosion and oxidation resistance of such alloys based on Ni3Al can be improved by adding silicon or chromium (see MWGrünling and R. Bauer, "The role of Silicon in corrosion resistant high temperature coatings", Thin Films, Vol. 95, 1982, pp. 3-20).
  • the alloying of silicon is the more feasible route than that of chromium, since the intermetallic compound Ni3Si which occurs simultaneously is completely miscible in Ni3Al. It is therefore an isomorphic state, with no further, undesirable phases being formed (see Shouichi Ochiai et al, "Alloying behavior of Ni3Al; Ni3Ga, Ni3Si and Ni3Ge", Acta Met. Vol. 32, No. 2, pp. 289, 1984).
  • the invention has for its object to provide an alloy of high toughness at room temperature with high oxidation and corrosion resistance, especially against sulfidation at high temperatures and high heat resistance in the temperature range of 400 to 800 ° C, which is well suited for directional solidification and essentially consists of an intermetallic compound of the nickel aluminide type with further additives.
  • the alloy should have a hot flow limit of at least 900 MPa and a hot tensile strength of at least 950 MPa in the temperature range from 400 to 700 ° C. Furthermore, it should have a high ductility and toughness, especially at room temperature.
  • the figure refers to a representation of the yield point ⁇ 0.2 and the tensile strength ⁇ B in MPa as a function of the temperature T in ° C.
  • Curve 1 represents the flow limit for a new alloy with 17.5 at% Al; 2 at% Si; 4 at% Nb; 0.5 at% B; Rest Ni. It reaches a maximum of over 1100 MPa at a temperature of approx. 500 ° C. At 700 ° C the yield point is still 950 MPa, at 800 ° C it is still over 800 MPa.
  • Curve 2 relates to the course of the tensile strength for the same alloy. Their value rises from room temperature from 950 MPa to over 1130 MPa at 500 ° C and falls to 700 ° C to 970 MPa and for 800 ° C to 860 MPA.
  • the melt was poured into a cast blank of approximately 140 mm in diameter and approximately 160 mm in height.
  • the blank was forced under vacuum to solidify in the form of rods with a diameter of approx. 15 mm and a length of approx. 140 mm.
  • Example 2 The melt was poured off in exactly the same way as in Example 1, melted again under vacuum and forced into directional solidification in the form of a rod.
  • the bars produced in this way had the same dimensions as those of Example 1.
  • the strength values were the same as those of the figure comparable.
  • the maxima were shifted to slightly lower temperatures (just below 500 ° C).
  • Example 1 The directionally solidified bars and the tensile specimens were produced as in Example 1. The strength values were in the same order of magnitude as in this example. The maxima were shifted to higher temperatures (approx. 600 ° C).
  • Example 2 The procedure was exactly the same as in Example 1. The strength values were still slightly above those of Example 1. The maxima were at a temperature of approx. 700 ° C.
  • the invention is not restricted to the exemplary embodiments.
  • the Si has a favorable effect on the high-temperature corrosion resistance, while the Nb increases the heat resistance and shifts its maximum to higher temperatures.
  • the ductility at room temperature is comparatively high, which has a favorable effect on the assembly of components in the construction of thermal machines and during commissioning.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Powder Metallurgy (AREA)
  • Coating By Spraying Or Casting (AREA)
EP90113560A 1989-07-26 1990-07-16 Oxydations- und korrosionsbeständige Hochtemperaturlegierung hoher Zähigkeit bei Raumtemperatur für gerichtete Erstarrung auf der Basis einer intermetallischen Verbindung des Typs Nickelaluminid Ceased EP0410252A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2789/89 1989-07-26
CH2789/89A CH678633A5 (enrdf_load_stackoverflow) 1989-07-26 1989-07-26

Publications (1)

Publication Number Publication Date
EP0410252A1 true EP0410252A1 (de) 1991-01-30

Family

ID=4241628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113560A Ceased EP0410252A1 (de) 1989-07-26 1990-07-16 Oxydations- und korrosionsbeständige Hochtemperaturlegierung hoher Zähigkeit bei Raumtemperatur für gerichtete Erstarrung auf der Basis einer intermetallischen Verbindung des Typs Nickelaluminid

Country Status (7)

Country Link
US (1) US5059259A (enrdf_load_stackoverflow)
EP (1) EP0410252A1 (enrdf_load_stackoverflow)
JP (1) JPH0361344A (enrdf_load_stackoverflow)
CA (1) CA2021718A1 (enrdf_load_stackoverflow)
CH (1) CH678633A5 (enrdf_load_stackoverflow)
PL (1) PL286050A1 (enrdf_load_stackoverflow)
RU (1) RU1831511C (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7183745B2 (en) 2000-08-11 2007-02-27 Milwaukee Electric Tool Corporation Adapter for a power tool battery
US11525172B1 (en) 2021-12-01 2022-12-13 L.E. Jones Company Nickel-niobium intermetallic alloy useful for valve seat inserts

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1812144A1 (de) * 1967-12-06 1969-08-14 Union Carbide Corp Metallurgischer Werkstoff und Verfahren zu seiner Herstellung
GB2037322A (en) * 1978-10-24 1980-07-09 Izumi O Super heat resistant alloys having high ductility at room temperature and high strength at high temperatures
US4325756A (en) * 1978-12-18 1982-04-20 United Technologies Corporation Fatigue resistant nickel superalloy
EP0110268A2 (en) * 1982-11-29 1984-06-13 General Electric Company Method for imparting strength and ductility to intermetallic phases
EP0217305A2 (en) * 1985-10-03 1987-04-08 General Electric Company Cold worked tri-nickel aluminide alloy compositions
EP0217304A2 (en) * 1985-10-03 1987-04-08 General Electric Company Tri-nickel aluminide compositions and their material processing to increase strength

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922168A (en) * 1971-05-26 1975-11-25 Nat Res Dev Intermetallic compound materials

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1812144A1 (de) * 1967-12-06 1969-08-14 Union Carbide Corp Metallurgischer Werkstoff und Verfahren zu seiner Herstellung
GB2037322A (en) * 1978-10-24 1980-07-09 Izumi O Super heat resistant alloys having high ductility at room temperature and high strength at high temperatures
US4325756A (en) * 1978-12-18 1982-04-20 United Technologies Corporation Fatigue resistant nickel superalloy
EP0110268A2 (en) * 1982-11-29 1984-06-13 General Electric Company Method for imparting strength and ductility to intermetallic phases
EP0217305A2 (en) * 1985-10-03 1987-04-08 General Electric Company Cold worked tri-nickel aluminide alloy compositions
EP0217304A2 (en) * 1985-10-03 1987-04-08 General Electric Company Tri-nickel aluminide compositions and their material processing to increase strength

Also Published As

Publication number Publication date
RU1831511C (ru) 1993-07-30
CH678633A5 (enrdf_load_stackoverflow) 1991-10-15
CA2021718A1 (en) 1991-01-27
PL286050A1 (en) 1991-06-03
JPH0361344A (ja) 1991-03-18
US5059259A (en) 1991-10-22

Similar Documents

Publication Publication Date Title
DE60030668T2 (de) Hochfeste Aluminiumlegierung
DE69620998T2 (de) Oxidationsbeständige molybdänlegierung
DE69400848T2 (de) Titanaluminid-Legierungen mit guter Kriechfestigkeit
DE3719902C2 (de) Superlegierungs-Gegenstand auf Nickelbasis mit säulenartiger Kristall-Kornform
DE2445462B2 (de) Verwendung einer Nickellegierung
DE2133103A1 (de) Sich in der Hitze erholende Leigierung
DE2637443A1 (de) Poroeses dichtungsteil fuer hohe temperatur
DE3023576A1 (de) Waermebehandelter einkristallsuperlegierungsgegenstand und verfahren zu seiner herstellung
EP1015650B1 (de) Legierung auf der basis von titanaluminiden
DE2244311A1 (de) Hochtemperaturbestaendige nickellegierung
EP0465686B1 (de) Oxydations- und korrosionsbeständige Legierung für Bauteile für einen mittleren Temperaturbereich auf der Basis von dotiertem Eisenaluminid Fe3Al
DE60008116T2 (de) Superlegierung mit optimiertem Hochtemperatur-Leistungsvermögen in Hochdruck-Turbinenscheiben
DE69104507T2 (de) Ventil einer Brennkraftmaschine aus Titanlegierung.
DE1966949C3 (de) Verfahren zur Herstellung von zu hochwarmfesten Gußstücken verarbeitbaren Legierungen auf Nickelbasis
EP3054023A1 (de) Al-reiche hochtemperatur-tial -legierung
CH646999A5 (de) Gegenstand aus einer hochfesten aluminiumlegierung und verfahren zu seiner herstellung.
DE3242608C2 (de) Superlegierungen auf Nickelbasis
DE69427281T2 (de) Leichtmetall beryllium - aluminiumlegierung mit hoher festigkeit
DE69205092T2 (de) Gusslegierung auf Nickelbasis.
DE3248134A1 (de) Hochfester und korrosionsbestaendiger einkristallgegenstand aus einer legierung auf nickelbasis
EP0410252A1 (de) Oxydations- und korrosionsbeständige Hochtemperaturlegierung hoher Zähigkeit bei Raumtemperatur für gerichtete Erstarrung auf der Basis einer intermetallischen Verbindung des Typs Nickelaluminid
DE3934409A1 (de) Oxydations- und korrosionsbestaendige hochtemperaturlegierung fuer gerichtete erstarrung auf der basis einer intermetallischen verbindung des typs nickelaluminid
DE3446176A1 (de) Verfahren zur waermebehandlung von superlegierungen vor dem isostatischen warmpressen
DE69017305T2 (de) Hitzebeständiger, leichter Werkstoff auf Titan-Aluminiumbasis.
EP0425972B1 (de) Oxydations- und korrosionsbeständige Hochtemperaturlegierung auf der Basis einer intermetallischen Verbindung

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 ES FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19910711

17Q First examination report despatched

Effective date: 19930823

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

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19940226