FR2432050A1 - PROCESS FOR IMPROVING THE STRUCTURE OF AUSTENIC CHROME-NICKEL STEEL TUBES - Google Patents

PROCESS FOR IMPROVING THE STRUCTURE OF AUSTENIC CHROME-NICKEL STEEL TUBES

Info

Publication number
FR2432050A1
FR2432050A1 FR7907836A FR7907836A FR2432050A1 FR 2432050 A1 FR2432050 A1 FR 2432050A1 FR 7907836 A FR7907836 A FR 7907836A FR 7907836 A FR7907836 A FR 7907836A FR 2432050 A1 FR2432050 A1 FR 2432050A1
Authority
FR
France
Prior art keywords
improving
austenic
chrome
temperature
steel tubes
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
FR7907836A
Other languages
French (fr)
Other versions
FR2432050B1 (en
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.)
Forschungszentrum Karlsruhe GmbH
Original Assignee
Kernforschungszentrum Karlsruhe GmbH
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 Kernforschungszentrum Karlsruhe GmbH filed Critical Kernforschungszentrum Karlsruhe GmbH
Publication of FR2432050A1 publication Critical patent/FR2432050A1/en
Application granted granted Critical
Publication of FR2432050B1 publication Critical patent/FR2432050B1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
    • C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

a. L'invention concerne un procédé pour améliorer la structure de tubes étirés en aciers chrome-nickel austénitiques. b. On soumet les pièces, dans une avant-dernière etape de la fabrication, à un recuit intermédiaire à une température inférieure de 50 à 150 degrés K à la température du recuit de dissolution, ensuite à un formage à froid avec une déformation de 15 % au maximum et pour finir au recuit de dissolution où la température est de l'ordre de 1353 à 1423 degrés K. c. Ce procédé permet d'améliorer nettement les propriétés physiques des tubes ainsi fabriqués, ce qui leur donne une plus longue durée de fonctionnement.at. The invention relates to a method for improving the structure of drawn tubes of austenitic chromium-nickel steels. b. The parts are subjected, in a penultimate manufacturing step, to intermediate annealing at a temperature 50 to 150 degrees K below the temperature of the dissolution annealing, then to cold forming with a strain of 15% at maximum and finally at dissolution annealing where the temperature is of the order of 1353 to 1423 degrees K. c. This process makes it possible to significantly improve the physical properties of the tubes thus manufactured, which gives them a longer service life.

FR7907836A 1978-07-29 1979-03-28 PROCESS FOR IMPROVING THE STRUCTURE OF AUSTENIC CHROME-NICKEL STEEL TUBES Expired FR2432050B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782833339 DE2833339C2 (en) 1978-07-29 1978-07-29 Process for improving the structure of drawn tubes made of austenitic chromium-nickel steels

Publications (2)

Publication Number Publication Date
FR2432050A1 true FR2432050A1 (en) 1980-02-22
FR2432050B1 FR2432050B1 (en) 1988-07-01

Family

ID=6045707

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7907836A Expired FR2432050B1 (en) 1978-07-29 1979-03-28 PROCESS FOR IMPROVING THE STRUCTURE OF AUSTENIC CHROME-NICKEL STEEL TUBES

Country Status (3)

Country Link
DE (1) DE2833339C2 (en)
FR (1) FR2432050B1 (en)
GB (1) GB2027627B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5681658A (en) 1979-12-05 1981-07-03 Nippon Kokan Kk <Nkk> Austenitic alloy pipe with superior hot steam oxidation resistance
US4359350A (en) * 1981-03-27 1982-11-16 The United States Of America As Represented By The Department Of Energy High post-irradiation ductility thermomechanical treatment for precipitation strengthened austenitic alloys
US4421572A (en) * 1982-03-18 1983-12-20 The United States Of America As Represented By The United States Department Of Energy Thermomechanical treatment of alloys
US5702543A (en) * 1992-12-21 1997-12-30 Palumbo; Gino Thermomechanical processing of metallic materials
US6129795A (en) * 1997-08-04 2000-10-10 Integran Technologies Inc. Metallurgical method for processing nickel- and iron-based superalloys
US6086691A (en) * 1997-08-04 2000-07-11 Lehockey; Edward M. Metallurgical process for manufacturing electrowinning lead alloy electrodes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1439636A (en) * 1964-07-08 1966-05-20 Atomic Energy Authority Uk Improvements in heat treatment of metals
FR1475970A (en) * 1965-03-01 1967-04-07 Atomic Energy Authority Uk Sheathing tubes
GB1124287A (en) * 1964-12-03 1968-08-21 Atomic Energy Authority Uk Improvements in the treatment of stainless steel tubes
US3723193A (en) * 1970-10-27 1973-03-27 Atomic Energy Commission Process for producing a fine-grained 316 stainless steel tubing containing a uniformly distributed intragranular carbide phase
FR2343052A1 (en) * 1976-03-01 1977-09-30 Kubota Ltd Fine grained stainless steel prods. - produced by deformation and recrystallisation heat treatment giving resistance to intercrystalline corrosion

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB993613A (en) * 1963-11-22 1965-06-02 Sandvikens Jernverks Ab Alloy steels and articles made therefrom

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1439636A (en) * 1964-07-08 1966-05-20 Atomic Energy Authority Uk Improvements in heat treatment of metals
GB1124287A (en) * 1964-12-03 1968-08-21 Atomic Energy Authority Uk Improvements in the treatment of stainless steel tubes
FR1475970A (en) * 1965-03-01 1967-04-07 Atomic Energy Authority Uk Sheathing tubes
US3723193A (en) * 1970-10-27 1973-03-27 Atomic Energy Commission Process for producing a fine-grained 316 stainless steel tubing containing a uniformly distributed intragranular carbide phase
FR2343052A1 (en) * 1976-03-01 1977-09-30 Kubota Ltd Fine grained stainless steel prods. - produced by deformation and recrystallisation heat treatment giving resistance to intercrystalline corrosion

Also Published As

Publication number Publication date
DE2833339A1 (en) 1980-02-07
FR2432050B1 (en) 1988-07-01
DE2833339C2 (en) 1983-12-15
GB2027627B (en) 1982-05-19
GB2027627A (en) 1980-02-27

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Legal Events

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