EP0157711A1 - Verfahren zur Herstellung von Gegenständen aus Al-Li-Mg-Cu Legierungen mit hoher Duktilität und Isotropie - Google Patents

Verfahren zur Herstellung von Gegenständen aus Al-Li-Mg-Cu Legierungen mit hoher Duktilität und Isotropie Download PDF

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Publication number
EP0157711A1
EP0157711A1 EP85420041A EP85420041A EP0157711A1 EP 0157711 A1 EP0157711 A1 EP 0157711A1 EP 85420041 A EP85420041 A EP 85420041A EP 85420041 A EP85420041 A EP 85420041A EP 0157711 A1 EP0157711 A1 EP 0157711A1
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EP
European Patent Office
Prior art keywords
cold
transformation
isotropy
range
hour
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Granted
Application number
EP85420041A
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English (en)
French (fr)
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EP0157711B1 (de
Inventor
Philippe Meyer
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.)
Constellium Issoire SAS
Original Assignee
Cegedur Societe de Transformation de lAluminium Pechiney SA
Pechiney Rhenalu SAS
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Application filed by Cegedur Societe de Transformation de lAluminium Pechiney SA, Pechiney Rhenalu SAS filed Critical Cegedur Societe de Transformation de lAluminium Pechiney SA
Priority to AT85420041T priority Critical patent/ATE31329T1/de
Publication of EP0157711A1 publication Critical patent/EP0157711A1/de
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    • 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
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/057—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent

Definitions

  • the invention relates to a process for obtaining Al-based alloy products containing essentially Li, Mg and Cu as main alloying elements and having high ductility and isotropy.
  • the ranges of conventional manufacturing which include in particular a homogenization of the initial products obtained either by casting or by powder metallurgy, possible scalping, hot transformation, cold transformation with one or more intermediate anneals if necessary, dissolution and tempering, with a possible strain hardening between these last two operations, lead, on alloys of the Al-Li-Mg-Cu family, to mechanical tensile characteristics (breaking load Rm, elastic limit Rp 0.2 and ductility A%) varying very significantly depending on the direction of sampling compared to the main direction of hot and cold processing (long sense) of the products.
  • the method according to the invention makes it possible to considerably improve the isotropy of the mechanical characteristics of products of alloy type Al-Li-Mg-Cu, while also improving their ductility.
  • a hot transformation at a temperature below 420 ° C, generally between 100 and 400 ° C and preferably between 300 and 350 ° C until the desired final dimensions or up to intermediate dimensions.
  • this "lukewarm" transformation is followed by the conventional solution treatment (generally between 500 ° and 550 ° C depending on the alloy) and thermomechanical hardening treatments structurally.
  • the intermediate product is generally brought to the final dimensions by cold processing, using one or more intermediate anneals, if necessary. These can be done just before cold processing and / or during it. In this case, at least one of these anneals is carried out in a temperature range between 200 and 550 ° C.
  • the holding times are of the order of a few minutes to several hours, the shortest times being generally associated with highest temperatures.
  • the cooling rate after this (or these) intermediate annealing (s) is an important parameter of the process and should preferably be between 1500 ° C / sec and 30 ° C / hour.
  • the speeds higher than 1500 ° C / sec are difficult to reach industrially, except on very thin product, and the speeds lower than 30 ° C / hour do not bring an appreciable improvement to the isotropy.
  • the intermediate annealing (s) can be conducted, as is known, either in salt bath furnaces (nitrite-nitrate, nitrate-nitrate), or in static ventilated air ovens, or in passage ovens.
  • the products undergo the usual solutions for dissolving, quenching and thermomechanical treatment for structural hardening, the dissolving constituting ipso facto the final annealing.
  • FIGS. 1 and 2 represent in polar coordinates the variations in the mechanical traction characteristics obtained on sheets according to the direction of removal according to conventional ranges (marks A to F) or according to the invention (marks 1 and 2).
  • Tensile samples were taken in the directions 0 ° (long direction L), 30 °, 60 ° and 90 ° (long direction long TL) relative to the rolling direction.
  • the tensile test pieces were taken under the same conditions as above.

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  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Thermal Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Continuous Casting (AREA)
  • Powder Metallurgy (AREA)
  • Metal Rolling (AREA)
  • Physical Vapour Deposition (AREA)
  • Conductive Materials (AREA)
EP85420041A 1984-03-15 1985-03-11 Verfahren zur Herstellung von Gegenständen aus Al-Li-Mg-Cu Legierungen mit hoher Duktilität und Isotropie Expired EP0157711B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85420041T ATE31329T1 (de) 1984-03-15 1985-03-11 Verfahren zur herstellung von gegenstaenden aus al-li-mg-cu legierungen mit hoher duktilitaet und isotropie.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8404481 1984-03-15
FR8404481A FR2561264B1 (fr) 1984-03-15 1984-03-15 Procede d'obtention de produits en alliages al-li-mg-cu a ductilite et isotropie elevees

Publications (2)

Publication Number Publication Date
EP0157711A1 true EP0157711A1 (de) 1985-10-09
EP0157711B1 EP0157711B1 (de) 1987-12-09

Family

ID=9302350

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85420041A Expired EP0157711B1 (de) 1984-03-15 1985-03-11 Verfahren zur Herstellung von Gegenständen aus Al-Li-Mg-Cu Legierungen mit hoher Duktilität und Isotropie

Country Status (9)

Country Link
US (1) US4652314A (de)
EP (1) EP0157711B1 (de)
JP (1) JPS60211057A (de)
AT (1) ATE31329T1 (de)
BR (1) BR8501142A (de)
CA (1) CA1268689A (de)
DE (1) DE3561163D1 (de)
FR (1) FR2561264B1 (de)
IL (1) IL74575A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2610949A1 (fr) * 1987-02-18 1988-08-19 Cegedur Procede de desensibilisation a la corrosion sous tension des alliages d'al contenant du li
EP0282421A2 (de) * 1987-02-18 1988-09-14 Pechiney Rhenalu Zugspannungsbeständiges Lithium enthaltendes Aluminiumlegierungs-Erzeugnis und Verfahren zu seiner Herstellung
EP0394155A1 (de) * 1989-04-21 1990-10-24 Pechiney Rhenalu Kalt verformbare Al-Li-Cu-Mg-Legierung mit guter Beständigkeit gegen Beschädigungen
WO1991008319A1 (en) * 1989-11-28 1991-06-13 Alcan International Limited Improvements in or relating to aluminium alloys
FR2675816A1 (fr) * 1991-04-24 1992-10-30 Hoogovens Aluminium Gmbh Procede pour la fabrication de toles d'aluminium.
EP0514292A1 (de) * 1991-05-14 1992-11-19 Pechiney Rhenalu Verfahren zur Verbesserung der Querisotropie eines dünnen Produktes aus einer AA 7000 Aluminium-Legierung
GB2262744A (en) * 1991-12-26 1993-06-30 Korea Inst Sci & Tech Thermo mechanical treatment method for providing superplasticity to al-li alloy

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61166938A (ja) * 1985-01-16 1986-07-28 Kobe Steel Ltd 展伸用Ａｌ−Ｌｉ系合金およびその製造方法
US5462712A (en) * 1988-08-18 1995-10-31 Martin Marietta Corporation High strength Al-Cu-Li-Zn-Mg alloys
US5259897A (en) * 1988-08-18 1993-11-09 Martin Marietta Corporation Ultrahigh strength Al-Cu-Li-Mg alloys
US5211910A (en) * 1990-01-26 1993-05-18 Martin Marietta Corporation Ultra high strength aluminum-base alloys
US5106430A (en) * 1990-02-12 1992-04-21 Allied-Signal, Inc. Rapidly solidified aluminum lithium alloys having zirconium
US5133931A (en) * 1990-08-28 1992-07-28 Reynolds Metals Company Lithium aluminum alloy system
US5198045A (en) * 1991-05-14 1993-03-30 Reynolds Metals Company Low density high strength al-li alloy
DE69805510T2 (de) * 1997-02-19 2002-11-21 Alcan Int Ltd Verfahren zur herstellung von blech aus aluminium-legierung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2343057A1 (fr) * 1976-03-04 1977-09-30 Alusuisse Procede pour produire des alliages d'aluminium malleables
EP0090583A2 (de) * 1982-03-31 1983-10-05 Alcan International Limited Wärmebehandlung von Aluminiumlegierungen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5441972A (en) * 1977-07-12 1979-04-03 Mitsubishi Petrochem Co Ltd Preparation of laminated composite film of biaxially oriented propylene polymer having excellent gas barrier properties

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2343057A1 (fr) * 1976-03-04 1977-09-30 Alusuisse Procede pour produire des alliages d'aluminium malleables
EP0090583A2 (de) * 1982-03-31 1983-10-05 Alcan International Limited Wärmebehandlung von Aluminiumlegierungen

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2610949A1 (fr) * 1987-02-18 1988-08-19 Cegedur Procede de desensibilisation a la corrosion sous tension des alliages d'al contenant du li
EP0282421A2 (de) * 1987-02-18 1988-09-14 Pechiney Rhenalu Zugspannungsbeständiges Lithium enthaltendes Aluminiumlegierungs-Erzeugnis und Verfahren zu seiner Herstellung
EP0282421A3 (en) * 1987-02-18 1989-01-18 Cegedur Societe De Transformation De L'aluminium Pechiney Aluminium alloy product containing lithium resistant to corrosion under tension and process for production
EP0394155A1 (de) * 1989-04-21 1990-10-24 Pechiney Rhenalu Kalt verformbare Al-Li-Cu-Mg-Legierung mit guter Beständigkeit gegen Beschädigungen
FR2646172A1 (fr) * 1989-04-21 1990-10-26 Cegedur Alliage al-li-cu-mg a bonne deformabilite a froid et bonne resistance aux dommages
WO1991008319A1 (en) * 1989-11-28 1991-06-13 Alcan International Limited Improvements in or relating to aluminium alloys
US5374321A (en) * 1989-11-28 1994-12-20 Alcan International Limited Cold rolling for aluminum-lithium alloys
FR2675816A1 (fr) * 1991-04-24 1992-10-30 Hoogovens Aluminium Gmbh Procede pour la fabrication de toles d'aluminium.
EP0514292A1 (de) * 1991-05-14 1992-11-19 Pechiney Rhenalu Verfahren zur Verbesserung der Querisotropie eines dünnen Produktes aus einer AA 7000 Aluminium-Legierung
FR2676462A1 (fr) * 1991-05-14 1992-11-20 Pechiney Rhenalu Procede pour ameliorer l'isotropie travers des produits epais en alliages d'al.
GB2262744A (en) * 1991-12-26 1993-06-30 Korea Inst Sci & Tech Thermo mechanical treatment method for providing superplasticity to al-li alloy
GB2262744B (en) * 1991-12-26 1995-01-04 Korea Inst Sci & Tech Thermo mechanical treatment method for providing superplasticity to al-li alloy

Also Published As

Publication number Publication date
US4652314A (en) 1987-03-24
CA1268689A (fr) 1990-05-08
FR2561264A1 (fr) 1985-09-20
ATE31329T1 (de) 1987-12-15
BR8501142A (pt) 1985-11-12
DE3561163D1 (en) 1988-01-21
JPS60211057A (ja) 1985-10-23
IL74575A0 (en) 1985-06-30
FR2561264B1 (fr) 1986-06-27
EP0157711B1 (de) 1987-12-09
IL74575A (en) 1988-07-31

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