EP0020282B1 - Procédé de fabrication de corps creux en alliage d'aluminium et produits ainsi obtenus - Google Patents

Procédé de fabrication de corps creux en alliage d'aluminium et produits ainsi obtenus Download PDF

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Publication number
EP0020282B1
EP0020282B1 EP80420064A EP80420064A EP0020282B1 EP 0020282 B1 EP0020282 B1 EP 0020282B1 EP 80420064 A EP80420064 A EP 80420064A EP 80420064 A EP80420064 A EP 80420064A EP 0020282 B1 EP0020282 B1 EP 0020282B1
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EP
European Patent Office
Prior art keywords
alloy
subjected
solidification
mpa
less
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
Application number
EP80420064A
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German (de)
English (en)
French (fr)
Other versions
EP0020282A1 (fr
Inventor
Jean Coupry
Marc Anagnostidis
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.)
Metallurgigue de Gerzat
Original Assignee
Metallurgigue de Gerzat
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Publication date
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Application filed by Metallurgigue de Gerzat filed Critical Metallurgigue de Gerzat
Publication of EP0020282A1 publication Critical patent/EP0020282A1/fr
Application granted granted Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent

Definitions

  • This invention relates to a method for manufacturing hollow bodies of aluminum alloy and to the products thus obtained, which have high ductility (in the long direction) and high toughness (in the cross direction) when they are treated with resistance levels higher than 660 MPa.
  • alloys A-ZBGU (or 7049A) according to the AFNOR 50-411 standard, the analysis of which is given in Table 1, are particularly used in the manufacture of hollow bodies under pressure, because of the high mechanical characteristics which they acquire in the quenched-tempered state (state T6).
  • the aim of this invention is therefore to solve this problem by a suitable choice partially covering the field of alloy 7049A, which makes it possible to obtain, according to the process, products having high ductility and toughness characteristics, and, by therefore, great job security.
  • the general composition of the alloys according to the invention is as follows (by weight):
  • the V content is limited to a content of less than 0.01%.
  • the products are transformed in the following way: - homogenization between 460 and 490 ° C of the cast billets, hot deformation between 320 and 420 ° C, including possibly the shrinking of one (or both) end ( s) in the case of the production of hollow bodies, dissolving between 460 and 480 ° C. and tempering suitable for obtaining a breaking load (long direction) and a limit burst stress (transverse direction) greater than or equal to 660 MPa .
  • the hot deformation is preferably carried out by reverse spinning; homogenization, dissolution and income conditions may be different from those indicated above without departing from the scope of the invention.
  • the alloys marked 1 to 12 were vertically semi-continuously cast in 0 185 mm billets, which were homogenized 24 h at 450 ° C. These billets were machined at 0 170 mm and drilled with a central hole 0 70 mm for reverse spinning of tubes 0 82 x 67.5 mm at a temperature of 365 ° C.
  • the tubes thus obtained were subjected to tensile tests in a direction parallel to the generatrices of the tube and to bursting tests under hydraulic pressure (longitudinal tear).
  • the breaking load (Rm), the elastic limit (R 0.2), the elongation (A%) and the bursting stress (RE) were noted.
  • alloys 1 to 8 the composition of which is outside the scope of the invention, while alloys 9 to 12, according to the invention, achieve them.
  • the micrographic structure of the ingot in its lower 1/3 is represented by FIG. 1 at 200 magnification. No compound larger than 35 microns in its largest dimension is observed. In addition, all the compounds out of solution are observed in the interdendritic spaces. A good part of them is moreover resolved by subsequent heat treatments.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Extrusion Of Metal (AREA)
EP80420064A 1979-06-01 1980-05-28 Procédé de fabrication de corps creux en alliage d'aluminium et produits ainsi obtenus Expired EP0020282B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7915054 1979-06-01
FR7915054A FR2457908A1 (fr) 1979-06-01 1979-06-01 Procede de fabrication de corps creux en alliage d'aluminium et produits ainsi obtenus

Publications (2)

Publication Number Publication Date
EP0020282A1 EP0020282A1 (fr) 1980-12-10
EP0020282B1 true EP0020282B1 (fr) 1982-12-29

Family

ID=9226502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80420064A Expired EP0020282B1 (fr) 1979-06-01 1980-05-28 Procédé de fabrication de corps creux en alliage d'aluminium et produits ainsi obtenus

Country Status (11)

Country Link
US (1) US4345951A (es)
EP (1) EP0020282B1 (es)
BE (1) BE883565A (es)
CA (1) CA1118190A (es)
CH (1) CH644402A5 (es)
DE (1) DE3061495D1 (es)
ES (1) ES8102198A1 (es)
FR (1) FR2457908A1 (es)
IT (1) IT1130700B (es)
NO (1) NO153184C (es)
ZA (1) ZA803235B (es)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4863528A (en) * 1973-10-26 1989-09-05 Aluminum Company Of America Aluminum alloy product having improved combinations of strength and corrosion resistance properties and method for producing the same
FR2517702B1 (es) * 1981-12-03 1985-11-15 Gerzat Metallurg
US5221377A (en) * 1987-09-21 1993-06-22 Aluminum Company Of America Aluminum alloy product having improved combinations of properties
FR2640644B1 (fr) * 1988-12-19 1991-02-01 Pechiney Recherche Procede d'obtention par " pulverisation-depot " d'alliages d'al de la serie 7000 et de materiaux composites a renforts discontinus ayant pour matrice ces alliages a haute resistance mecanique et bonne ductilite
EP0694084B1 (en) * 1993-04-15 2001-09-19 Luxfer Group Limited Method of making hollow bodies
FR2716896B1 (fr) * 1994-03-02 1996-04-26 Pechiney Recherche Alliage 7000 à haute résistance mécanique et procédé d'obtention.
US5496426A (en) * 1994-07-20 1996-03-05 Aluminum Company Of America Aluminum alloy product having good combinations of mechanical and corrosion resistance properties and formability and process for producing such product
IL156386A0 (en) 2000-12-21 2004-01-04 Alcoa Inc Aluminum alloy products and artificial aging method
FR2838135B1 (fr) 2002-04-05 2005-01-28 Pechiney Rhenalu PRODUITS CORROYES EN ALLIAGES A1-Zn-Mg-Cu A TRES HAUTES CARACTERISTIQUES MECANIQUES, ET ELEMENTS DE STRUCTURE D'AERONEF
FR2838136B1 (fr) * 2002-04-05 2005-01-28 Pechiney Rhenalu PRODUITS EN ALLIAGE A1-Zn-Mg-Cu A COMPROMIS CARACTERISTIQUES STATISTIQUES/TOLERANCE AUX DOMMAGES AMELIORE
DE502005001724D1 (de) 2005-01-19 2007-11-29 Fuchs Kg Otto Abschreckunempfindliche Aluminiumlegierung sowie Verfahren zum Herstellen eines Halbzeuges aus dieser Legierung
US8083871B2 (en) 2005-10-28 2011-12-27 Automotive Casting Technology, Inc. High crashworthiness Al-Si-Mg alloy and methods for producing automotive casting
US8673209B2 (en) * 2007-05-14 2014-03-18 Alcoa Inc. Aluminum alloy products having improved property combinations and method for artificially aging same
US8840737B2 (en) * 2007-05-14 2014-09-23 Alcoa Inc. Aluminum alloy products having improved property combinations and method for artificially aging same
US8206517B1 (en) 2009-01-20 2012-06-26 Alcoa Inc. Aluminum alloys having improved ballistics and armor protection performance

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB552972A (en) * 1942-06-12 1943-05-03 Nat Smelting Co Improvements in or relating to aluminium base alloys
FR1322510A (fr) * 1962-05-02 1963-03-29 Aluminum Co Of America Perfectionnement à des articles en alliage à base d'aluminium obtenu par traitement thermique
DE2052000C3 (de) * 1970-10-23 1974-09-12 Fa. Otto Fuchs, 5882 Meinerzhagen Verwendung einer hochfesten Aluminiumlegierung
US4305763A (en) * 1978-09-29 1981-12-15 The Boeing Company Method of producing an aluminum alloy product

Also Published As

Publication number Publication date
NO801611L (no) 1980-12-02
BE883565A (fr) 1980-12-01
ZA803235B (en) 1981-05-27
ES491989A0 (es) 1980-12-16
DE3061495D1 (en) 1983-02-03
FR2457908A1 (fr) 1980-12-26
FR2457908B1 (es) 1984-03-02
IT8022416A0 (it) 1980-05-29
NO153184C (no) 1986-01-29
ES8102198A1 (es) 1980-12-16
US4345951A (en) 1982-08-24
IT1130700B (it) 1986-06-18
CH644402A5 (fr) 1984-07-31
CA1118190A (fr) 1982-02-16
EP0020282A1 (fr) 1980-12-10
NO153184B (no) 1985-10-21

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