EP0913491B1 - Procédé de production d'une pièce à partir d'un alliage au chrome et sa utilisation - Google Patents

Procédé de production d'une pièce à partir d'un alliage au chrome et sa utilisation Download PDF

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Publication number
EP0913491B1
EP0913491B1 EP98811018A EP98811018A EP0913491B1 EP 0913491 B1 EP0913491 B1 EP 0913491B1 EP 98811018 A EP98811018 A EP 98811018A EP 98811018 A EP98811018 A EP 98811018A EP 0913491 B1 EP0913491 B1 EP 0913491B1
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EP
European Patent Office
Prior art keywords
weight
max
workpiece
produced according
mpa
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.)
Expired - Lifetime
Application number
EP98811018A
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German (de)
English (en)
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EP0913491A1 (fr
Inventor
Peter Dr. Ernst
Peter Prof. Dr. Uggowitzer
Hannes Speidel
Markus Prof. Dr. Speidel
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
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ABB Research Ltd Switzerland
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Publication date
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Publication of EP0913491A1 publication Critical patent/EP0913491A1/fr
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent

Definitions

  • the invention is based on a method for producing a workpiece made of a chrome alloy according to the preamble of the first claim.
  • the invention also relates to the use of that produced by the process Workpiece.
  • An alloy is known from EP 0 657 556 A1 with the composition: 32-37 % By weight chrome 28-36 % By weight nickel Max. 2 % By weight manganese Max. 0.5 % By weight silicon Max. 0.1 % By weight aluminum Max. 0.03 % By weight carbon Max. 0.025 % By weight phosphorus Max. 0.01 % By weight sulfur Max. 2 % By weight molybdenum Max. 1 % By weight copper 0.3 - 0.7 % By weight nitrogen Remainder iron and manufacturing-related admixtures and impurities.
  • the alloy described in EP 0 657 556 A1 is manufactured by Krupp VDM sold under the name Nicrofer® 3033 - alloy 33.
  • Krupp VDM, Nicrofer® 3033 - alloy 33, material sheet No. 4142, June 1995 edition describes that workpieces after 15% cold working should be subjected to heat treatment at temperatures from 1080 to 1150 ° C, preferably at 1120 ° C. To achieve optimal Corrosion properties are accelerated with after heat treatment Cool water. After the heat treatment, the workpieces have the low strengths described above.
  • the invention has for its object in a method for manufacturing a workpiece made of a chrome alloy of the type mentioned Material with high strength, toughness, freedom from ferromagnetism and Freedom from susceptibility to stress corrosion cracking, both in water and in to create aqueous halide solutions.
  • the workpiece is cold worked and brought to a yield strength of at least 1000 MPa (R p0.2 ⁇ 1000 MPa) by the cold working.
  • the advantages of the invention can be seen, inter alia, in the fact that degrees of cold deformation (decrease in cross section due to cold deformation) of 20 percent and more, up to over 90 percent, bring about very excellent combinations of mechanical, physical and chemical properties. Yield strengths of 1000 MPa to well over 2000 MPa can still be achieved with good toughness (elongation at break of five to over ten percent). The result is a material of the highest strength that can meet the requirements of modern technology. Another advantage is the special physical and chemical properties that cannot be found with conventional materials of the same strength and corrosion resistance. The special physical properties of the material according to the invention are evident in the absence of ferromagnetism, which is a prerequisite for use as a cap ring material in turbogenerator construction. Due to its high stability of the face-centered cubic crystal lattice, the material according to the invention shows no deformation martensite even after severe cold working and thus remains free of ferromagnetism.
  • the present invention has provided a material which, owing to its excellent combination of mechanical strength and toughness, as well as corrosion resistance and its resistance to stress corrosion cracking and the absence of ferromagnetism, can be used specifically in the following fields of application: energy technology, offshore technology and oil drilling technology, air, and space, civil engineering, general mechanical engineering, chemical and petrochemical industry.
  • the drawing shows the yield strength R p02 , the tensile strength R m and the elongation at break A 5 depending on the degree of cold deformation.
  • the particularly preferred alloy ranges had the following composition: 32-37 % By weight chrome 28-36 % By weight nickel Max. 2 % By weight manganese Max. 0.5 % By weight silicon Max. 0.1 % By weight aluminum Max. 0.03 % By weight carbon Max. 0.025 % By weight phosphorus Max. 0.01 % By weight sulfur 0.5 - 2 % By weight molybdenum 0.3 - 1 % By weight copper 0.3 - 0.7 % By weight nitrogen Remainder iron and manufacturing-related admixtures and impurities.
  • the properties of the invention cold worked alloys are summarized in Table 1. Two comparison alloys are included in the table. It is about the alloys most used today worldwide for the alloy according to the invention Use as material for highly stressed generator rotor cap rings.
  • the cold-formed alloy according to the invention is obviously distinguished by an unusually good combination of strength, ductility and toughness.
  • the decisive superiority of the cold-formed chrome-based alloy is evident in the corrosion properties and resistance to stress corrosion cracking. It is known that the corrosion resistance of austenitic steels increases in proportion to the chromium, molybdenum and nitrogen content, corresponding to the empirical active sum% Cr + 3.3% Mo + 20% N. An effective total value of approximately 45 is achieved with the alloy according to the invention.
  • the corrosion resistance is therefore at a level which is significantly higher than that of the steels used today for generator rotor cap rings with 18% Cr, 18% Mn, 0.6N or 18% Mn, 5% Cr, 0.55% C.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)

Claims (10)

  1. Procédé pour la fabrication d'une pièce en un alliage de chrome, se composant, en poids, de: 32 - 37 % chrome 28 - 36 % nickel max. 2 % manganèse max. 0,5 % silicium max. 0,1 % aluminium max. 0,03 % carbone max. 0,025 % phosphore max. 0,01 % soufre max. 2 % molybdène max. 1 % cuivre 0,3 - 0,7 % azote
    le reste étant du fer ainsi que des additions de fabrication et des impuretés,
    caractérisé en ce que la pièce est déformée à froid et est amenée par la déformation à froid à une limite d'élasticité d'au moins 1000 MPa (Rp0,2 ≥ 1000 MPa).
  2. Procédé pour la fabrication d'une pièce en un alliage de chrome, se composant, en poids, de: 32 - 37 % chrome 28 - 36 % nickel max. 2 % manganèse max. 0,5 % silicium max. 0,1 % aluminium max. 0,03 % carbone max. 0,025 % phosphore max. 0,01 % soufre 0,5 - 2 % molybdène 0,3 - 1 % cuivre 0,3 - 0,7 % azote
    le reste étant du fer ainsi que des additions de fabrication et des impuretés,
    caractérisé en ce que la pièce est déformée à froid et est amenée par la déformation à froid à une limite d'élasticité d'au moins 1000 MPa (Rp0,2 ≥ 1000 MPa).
  3. Procédé pour la fabrication d'une pièce suivant la revendication 1 ou 2, caractérisé en ce que le taux de déformation à froid atteint au moins 20%.
  4. Utilisation de la pièce fabriquée suivant l'une quelconque des revendications 1 à 3 pour des anneaux de retenue de générateurs/rotors.
  5. Utilisation de la pièce fabriquée suivant l'une quelconque des revendications 1 à 3 dans la technique offshore et la technique du forage pétrolier pour des soupapes, des conduites rigides, des éléments d'assemblage et des masses-tiges.
  6. Utilisation de la pièce fabriquée suivant l'une quelconque des revendications 1 à 3, dans la technique aéronautique ou astronautique pour des parties portantes ainsi que pour des éléments d'assemblage, en particulier des vis, des boulons et des rivets.
  7. Utilisation de la pièce fabriquée suivant l'une quelconque des revendications 1 à 3, dans les constructions en hauteur et dans le génie civil pour des éléments d'assemblage comme des clous, des rivets, des vis, des chevilles ainsi que pour des câbles de traction, des tirants de roche, des éléments de fixation à des façades, des ancrages de façades, des tunnels, des ponts, des toitures y compris des suspensions de toitures pour des piscines, ainsi que pour des câbles de précontrainte, des tendeurs, des plaques d'ancrage, des articulations, des ancrages de glissières de sécurité, des structures portantes, des armatures et pour des éléments portants dans la construction en acier.
  8. Utilisation de la pièce fabriquée suivant l'une quelconque des revendications 1 à 3, dans la construction des machines en général et dans l'industrie chimique et pétrochimique, où des pièces à haute résistance sont exposées, sous des contraintes mécaniques, à des agents favorisant la corrosion fissurante.
  9. Utilisation de la pièce fabriquée suivant l'une quelconque des revendications 1 à 3, pour des pièces utilisées dans la technique des transports, sur mer et sur terre, dans des véhicules amphibies, dans des systèmes de support et de conduite qui doivent en même temps résister à des charges mécaniques et à des atmosphères agressives.
  10. Utilisation de la pièce fabriquée suivant l'une quelconque des revendications 1 à 3, dans des appareils de sports et de loisirs, y compris la construction navale et les équipements de plongée.
EP98811018A 1997-10-31 1998-10-13 Procédé de production d'une pièce à partir d'un alliage au chrome et sa utilisation Expired - Lifetime EP0913491B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19748205A DE19748205A1 (de) 1997-10-31 1997-10-31 Verfahren zur Herstellung eines Werkstückes aus einer Chromlegierung und dessen Verwendung
DE19748205 1997-10-31

Publications (2)

Publication Number Publication Date
EP0913491A1 EP0913491A1 (fr) 1999-05-06
EP0913491B1 true EP0913491B1 (fr) 2001-11-28

Family

ID=7847257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98811018A Expired - Lifetime EP0913491B1 (fr) 1997-10-31 1998-10-13 Procédé de production d'une pièce à partir d'un alliage au chrome et sa utilisation

Country Status (6)

Country Link
US (2) US6406572B1 (fr)
EP (1) EP0913491B1 (fr)
JP (1) JPH11246922A (fr)
CN (1) CN1093885C (fr)
DE (2) DE19748205A1 (fr)
PL (1) PL329400A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408889B (de) 2000-06-30 2002-03-25 Schoeller Bleckmann Oilfield T Korrosionsbeständiger werkstoff
RU2514899C1 (ru) * 2013-01-30 2014-05-10 Анатолий Матвеевич Адаскин Способ термической обработки жаропрочного и жаростойкого сплава х65нвфт
RU2515145C1 (ru) * 2013-05-30 2014-05-10 Анатолий Матвеевич Адаскин Способ термической обработки жаропрочного и жаростойкого сплава х65нвфт
EP3269924A1 (fr) 2016-07-14 2018-01-17 Siemens Aktiengesellschaft Arbre de rotor et procede de fabrication d'un arbre de rotor
EA202190631A1 (ru) 2018-08-29 2021-06-09 Кеметикс Инк. Аустенитный нержавеющий сплав с превосходной коррозионной стойкостью
JP7307370B2 (ja) * 2019-10-10 2023-07-12 日本製鉄株式会社 合金材および油井用継目無管
CN115323234B (zh) * 2022-08-09 2023-08-01 东睦新材料集团股份有限公司 一种无磁低膨胀铬基合金材料的制备方法
CN119040559B (zh) * 2024-09-06 2025-08-26 中航上大高温合金材料股份有限公司 超高氮超低碳Fe-Cr-Ni基高温合金的冶炼方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4424083A (en) * 1980-11-21 1984-01-03 Exxon Research And Engineering Co. Carburization resistance of austenitic stainless steel tubes
US4400209A (en) * 1981-06-10 1983-08-23 Sumitomo Metal Industries, Ltd. Alloy for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking
US4400210A (en) * 1981-06-10 1983-08-23 Sumitomo Metal Industries, Ltd. Alloy for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking
US4421571A (en) * 1981-07-03 1983-12-20 Sumitomo Metal Industries, Ltd. Process for making high strength deep well casing and tubing having improved resistance to stress-corrosion cracking
JPS6141746A (ja) * 1984-08-01 1986-02-28 Nippon Steel Corp 熱間加工性に優れた高強度高耐食性耐熱鋼
US4761190A (en) * 1985-12-11 1988-08-02 Inco Alloys International, Inc. Method of manufacture of a heat resistant alloy useful in heat recuperator applications and product
JPS62180037A (ja) 1986-02-03 1987-08-07 Daido Steel Co Ltd 耐応力腐食割れ性に優れたオ−ステナイト系合金
US5378427A (en) * 1991-03-13 1995-01-03 Sumitomo Metal Industries, Ltd. Corrosion-resistant alloy heat transfer tubes for heat-recovery boilers
DE4342188C2 (de) * 1993-12-10 1998-06-04 Bayer Ag Austenitische Legierungen und deren Verwendung
JPH08120392A (ja) * 1994-10-21 1996-05-14 Sumitomo Metal Ind Ltd 高効率廃棄物発電ボイラ過熱器管用オーステナイト系耐食合金

Also Published As

Publication number Publication date
DE19748205A1 (de) 1999-05-06
EP0913491A1 (fr) 1999-05-06
JPH11246922A (ja) 1999-09-14
PL329400A1 (en) 1999-05-10
CN1093885C (zh) 2002-11-06
CN1221802A (zh) 1999-07-07
US20020141897A1 (en) 2002-10-03
US6406572B1 (en) 2002-06-18
DE59802224D1 (de) 2002-01-10
US6616779B2 (en) 2003-09-09

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