EP0774526A1 - Superalliage fer-nickel du type IN 706 - Google Patents

Superalliage fer-nickel du type IN 706 Download PDF

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Publication number
EP0774526A1
EP0774526A1 EP96810754A EP96810754A EP0774526A1 EP 0774526 A1 EP0774526 A1 EP 0774526A1 EP 96810754 A EP96810754 A EP 96810754A EP 96810754 A EP96810754 A EP 96810754A EP 0774526 A1 EP0774526 A1 EP 0774526A1
Authority
EP
European Patent Office
Prior art keywords
iron
alloy
temperature
solution
precipitation hardening
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
EP96810754A
Other languages
German (de)
English (en)
Other versions
EP0774526B1 (fr
Inventor
Mohamed Dr. Nazmy
Corrado Noseda
Joachim Dr. Rösler
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.)
Alstom SA
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 EP0774526A1 publication Critical patent/EP0774526A1/fr
Application granted granted Critical
Publication of EP0774526B1 publication Critical patent/EP0774526B1/fr
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
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
    • 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
    • C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W

Definitions

  • the invention relates to a prior art of iron-nickel superalloys of the type IN 706 as described, for example, by J.H. Moll et al. "The Microstructure of 706, a New Fe-Ni-Base Superalloy” Met. Trans. 1971, vol. 2, pp.2143-2151, and "Heat Treatment of 706 Alloy for Optimum 1200 ° F Stress-Rupture Properties” Met. Trans. 1971, vol.2, pp.2153-2160.
  • the invention is based on the object of creating an iron-nickel superalloy of type IN 706, which is characterized by high ductility and high ductility, and at the same time to provide a method with which the ductility of a material body formed from this alloy can be additionally improved.
  • the alloy according to the invention is characterized in particular by the fact that it has practically twice the long-term ductility compared to an additive-free iron-nickel superalloy of type IN 706 with only a slightly reduced heat resistance. Suitable additions of boron and / or hafnium measure the oxidation of the grain boundaries of the alloy structure supported by tensile forces. Unwanted material fatigue phenomena, such as notch embrittlement and stress crack growth, are thus significantly reduced.
  • This alloy is therefore particularly suitable as a material for the rotors of large gas turbines.
  • the alloy has a sufficiently high heat resistance. If locally acting temperature gradients occur, because of the high ductility of the alloy, undesirable stress forces have only a very minor effect on the microstructure.
  • the ductility of the alloy according to the invention can additionally be increased by suitable heat treatment steps, which include solution annealing, cooling and precipitation hardening be further improved.
  • alloy A B C. carbon 0.01 0.01 0.01 Silicon 0.04 0.04 0.04 manganese 0.12 0.12 0.12 sulfur ⁇ 0.001 ⁇ 0.001 ⁇ 0.001 phosphorus 0.005 0.005 0.005 chrome 16.03 16.03 16.03 nickel 41.9 41.9 41.9 aluminum 0.19 0.19 0.19 cobalt 0.01 0.01 0.01 titanium 1.67 1.67 1.67 copper ⁇ 0.01 ⁇ 0.01 ⁇ 0.01 niobium 2.95 2.95 2.95 boron - 0.2 - hafnium - - 1.0 iron rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest rest
  • the elongation at break in the material bodies B 'and C' formed by the alloys according to the invention are approximately 50 to 80% higher than the elongation at break in the case of the alloy Material body A 'formed according to the prior art.
  • the tensile strengths in the material bodies B 'and C' formed by the alloys according to the invention are at least as good as the tensile strength in the material body A 'formed by the alloy according to the prior art.
  • the material bodies B 'and C' formed by the alloys according to the invention therefore at 705 ° C., in terms of their ductility, far exceed the material bodies A 'produced by the alloy according to the prior art and are at least equal in terms of their heat resistance.
  • Material bodies formed from the alloys according to the invention can be used with great advantage as rotors of large gas turbines, since they have a sufficiently high heat resistance and because local temperature gradients which cannot be avoided due to the high ductility of the material can only locally build up low stresses.
  • the abovementioned properties are achieved with the alloys according to the invention if the proportion of boron is 0.02 to 0.3 percent by weight and that of hafnium is 0.05 to 1.5 percent by weight. With a lower proportion of boron or hafnium, the grain boundaries of the alloys are no longer influenced and embrittlement occurs. If the proportion of boron or hafnium is too large, the hot-formability of the alloys deteriorates.
  • Material bodies that are good enough for many applications can be obtained if solution annealed at temperatures between 900 ° C and 1000 ° C and then in a first stage at temperatures between 700 ° C and 760 ° C and in a second stage at temperatures between 600 ° C and 650 ° C is precipitation hardened.
  • the ductility of the alloy according to the invention can be considerably improved by suitable cooling.
  • a cooling rate between 0.5 and 20 [° C./min] at which the material is led from the annealing temperature provided during solution annealing to the temperature provided during precipitation hardening is preferred.
  • solution annealing should be carried out for a maximum of 15 hours at temperatures between 900 and 1000 ° C.
  • the precipitation hardening caused by holding at certain temperatures should preferably be carried out over a period of at least 10h and at most 70h.
  • the solution-annealed starting body should be kept at a temperature of at least 10 hours and at most 50 hours in the first stage and at a temperature of at least 5 hours and at most 20 hours in the second stage.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Heat Treatment Of Articles (AREA)
EP96810754A 1995-11-17 1996-11-07 Superalliage fer-nickel du type IN 706 Expired - Lifetime EP0774526B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19542920A DE19542920A1 (de) 1995-11-17 1995-11-17 Eisen-Nickel-Superlegierung vom Typ IN 706
DE19542920 1995-11-17

Publications (2)

Publication Number Publication Date
EP0774526A1 true EP0774526A1 (fr) 1997-05-21
EP0774526B1 EP0774526B1 (fr) 2002-01-16

Family

ID=7777737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810754A Expired - Lifetime EP0774526B1 (fr) 1995-11-17 1996-11-07 Superalliage fer-nickel du type IN 706

Country Status (8)

Country Link
US (1) US5863494A (fr)
EP (1) EP0774526B1 (fr)
JP (1) JP3781494B2 (fr)
KR (1) KR970027351A (fr)
CN (1) CN1079840C (fr)
CA (1) CA2184960C (fr)
DE (2) DE19542920A1 (fr)
RU (1) RU2173349C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2471970A3 (fr) * 2011-01-03 2012-10-10 General Electric Company Alliage
US8313593B2 (en) 2009-09-15 2012-11-20 General Electric Company Method of heat treating a Ni-based superalloy article and article made thereby

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4123064B2 (ja) * 2003-06-13 2008-07-23 株式会社日立製作所 蒸気タービンロータおよび蒸気タービンプラント
US7156932B2 (en) * 2003-10-06 2007-01-02 Ati Properties, Inc. Nickel-base alloys and methods of heat treating nickel-base alloys
US7316057B2 (en) * 2004-10-08 2008-01-08 Siemens Power Generation, Inc. Method of manufacturing a rotating apparatus disk
US7531054B2 (en) * 2005-08-24 2009-05-12 Ati Properties, Inc. Nickel alloy and method including direct aging
US8663404B2 (en) * 2007-01-08 2014-03-04 General Electric Company Heat treatment method and components treated according to the method
US8668790B2 (en) * 2007-01-08 2014-03-11 General Electric Company Heat treatment method and components treated according to the method
US7985304B2 (en) * 2007-04-19 2011-07-26 Ati Properties, Inc. Nickel-base alloys and articles made therefrom
US10266926B2 (en) 2013-04-23 2019-04-23 General Electric Company Cast nickel-base alloys including iron
DE102015206323A1 (de) * 2015-04-09 2016-10-13 Siemens Aktiengesellschaft Bauteil mit Festigkeitsgradienten, Verfahren und Turbine
CN106480445B (zh) * 2015-09-02 2019-02-26 沈阳大陆激光工程技术有限公司 在卷取机夹送辊表面制备耐磨抗热复合涂层的合金材料
US10563293B2 (en) 2015-12-07 2020-02-18 Ati Properties Llc Methods for processing nickel-base alloys

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB999439A (en) * 1962-05-10 1965-07-28 Allegheny Ludlum Steel Improvements in or relating to an austenitic alloy
DE2105745A1 (de) * 1970-02-09 1971-10-21 Wiggin & Co Ltd Henry Aushärtbare Nickel-Chrom-Stahllegierung
DE2223114A1 (de) * 1971-05-12 1972-11-23 Carpenter Technology Corp Verfahren zur Waermebehandlung von Legierungen auf Nickel-Eisen-Basis und dafuer insbesondere geeignete Legierungen
GB2023649A (en) * 1978-06-22 1980-01-03 Westinghouse Electric Corp Heat treating ironnickel-chromium alloys
US5415712A (en) * 1993-12-03 1995-05-16 General Electric Company Method of forging in 706 components

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1082739B (de) * 1953-05-29 1960-06-02 Nyby Bruk Ab Verwendung nicht ausscheidungshaertender, ueberhitzungsunempfindlicher Legierungen
US3785876A (en) * 1972-09-25 1974-01-15 Special Metals Corp Treating nickel base alloys

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB999439A (en) * 1962-05-10 1965-07-28 Allegheny Ludlum Steel Improvements in or relating to an austenitic alloy
DE2105745A1 (de) * 1970-02-09 1971-10-21 Wiggin & Co Ltd Henry Aushärtbare Nickel-Chrom-Stahllegierung
DE2223114A1 (de) * 1971-05-12 1972-11-23 Carpenter Technology Corp Verfahren zur Waermebehandlung von Legierungen auf Nickel-Eisen-Basis und dafuer insbesondere geeignete Legierungen
GB2023649A (en) * 1978-06-22 1980-01-03 Westinghouse Electric Corp Heat treating ironnickel-chromium alloys
US5415712A (en) * 1993-12-03 1995-05-16 General Electric Company Method of forging in 706 components

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
MOLL J H ET AL: "HEAT TREATMENT OF 706 ALLOY FOR OPTIMUM 1200 F STRESS-RUPTURE PROPERTIES", METALLURGICAL TRANSACTIONS, vol. 2, August 1971 (1971-08-01), NEW YORK, US, pages 2153 - 2160, XP000615562 *
MOLL J H ET AL: "THE MICROSTRUCTURE OF 706, A NEW FE-NI-BASE SUPERALLOY", METALLURGICAL TRANSACTIONS, vol. 2, August 1971 (1971-08-01), NEW YORK, US, pages 2143 - 2151, XP000615561 *
WOODFORD D A: "ENVIRONMENTAL DAMAGE OF A CAST NICKEL BASE SUPERALLOY", METALLURGICAL TRANSACTIONS A, vol. 12A, February 1981 (1981-02-01), NEW YORK, US, pages 299 - 308, XP000615565 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8313593B2 (en) 2009-09-15 2012-11-20 General Electric Company Method of heat treating a Ni-based superalloy article and article made thereby
EP2471970A3 (fr) * 2011-01-03 2012-10-10 General Electric Company Alliage
US8512485B2 (en) 2011-01-03 2013-08-20 General Electric Company Alloy

Also Published As

Publication number Publication date
JPH09170054A (ja) 1997-06-30
CA2184960C (fr) 2008-01-08
JP3781494B2 (ja) 2006-05-31
DE59608591D1 (de) 2002-02-21
US5863494A (en) 1999-01-26
CN1079840C (zh) 2002-02-27
KR970027351A (ko) 1997-06-24
CA2184960A1 (fr) 1997-05-18
EP0774526B1 (fr) 2002-01-16
RU2173349C2 (ru) 2001-09-10
DE19542920A1 (de) 1997-05-22
CN1157332A (zh) 1997-08-20

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