EP0375572B1 - Tiefziehbare Aluminiumlegierung, die Silicium, Magnesium und Kupfer enthält - Google Patents

Tiefziehbare Aluminiumlegierung, die Silicium, Magnesium und Kupfer enthält Download PDF

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Publication number
EP0375572B1
EP0375572B1 EP89420499A EP89420499A EP0375572B1 EP 0375572 B1 EP0375572 B1 EP 0375572B1 EP 89420499 A EP89420499 A EP 89420499A EP 89420499 A EP89420499 A EP 89420499A EP 0375572 B1 EP0375572 B1 EP 0375572B1
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European Patent Office
Prior art keywords
alloy
content
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elements
solution treatment
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EP89420499A
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English (en)
French (fr)
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EP0375572A1 (de
Inventor
Daniel Ferton
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Constellium Issoire SAS
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Pechiney Rhenalu SAS
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Priority to AT89420499T priority Critical patent/ATE90978T1/de
Publication of EP0375572A1 publication Critical patent/EP0375572A1/de
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    • 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
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon

Definitions

  • the invention relates to an Al alloy essentially containing Si, Mg and Cu intended for the manufacture of stampable sheets or strips, in particular sheets used in automobile bodywork.
  • US-A-4,614,552 describes an Al alloy for stamping containing essentially from 0.65 to 0.79% (by weight) Cu; from 0.62 to 0.82% Mg; from 0.6 to 1.0% Si; 0.1 to 0.5% Mn; up to 0.4% Fe; up to 0.10% Ti; remains Al.
  • anti-recrystallizing elements such as Mn, Cr and / or Zr, however in limited quantities.
  • a preferred composition of the alloy according to the invention therefore comprises an Mn content of less than or equal to 0.2% and contents of Cr and Zr ⁇ 0.05% each.
  • the manufacturing range used generally includes the following operations: . continuous or semi-continuous casting of blanks, possible homogenization, hot transformation, possible cold transformation, dissolution and tempering.
  • homogenization at high temperature between 520 ° C and 560 ° C with a holding time of 6 to 24 hours is desirable. Homogenization is preferably preceded by a slow rise in temperature.
  • the temperature at the end of hot transformation to avoid these recrystallizations, must imperatively be between 270 ° and 320 ° C.
  • the alloy After possible cold transformation, the alloy is put into a complete solution. This takes place in the temperature range between 520 and 560 ° C, and preferably between 530 ° and 550 ° C by targeting the temperature of 550 ° C.
  • the rise in temperature before dissolving must be rapid (V ⁇ 10 ° C / sec) and dissolving preferably performed either in a pass-through oven or in a sheet-to-sheet processing oven.
  • the processing time varies from a few seconds to a few minutes, without being able to exceed one hour.
  • the sheets and strips thus obtained have good isotropy and an average grain size generally not exceeding 60 ⁇ m.
  • the quenching must be rapid and depends on the thickness of the product. For sheets and strips, it is generally carried out in calm or pulsed air.
  • the parts undergo hardening income, under the usual conditions; the hardening is due to the precipitation of the Mg2Si phase and of AlCuMgSi complex phases. Tempering is typically carried out between 8 and 12 hrs around 165 ° C.
  • FIG. 1 giving the field of composition of alloys in the Mg-Si plane and is illustrated by the following example: - A 1100x300x2850 mm3 plate of the following weight composition was poured semi-continuously:
  • This plate was homogenized at 530 ° C-8h and immediately hot rolled; up to 4 mm thick, the final rolling temperature was 300 ° C; the strip thus obtained has been cold rolled until 1.2 mm thick, then dissolved in a passing oven at 550 ° C (about 1 min at temperature) at a speed of 20 m / min and quenched in a mist (air + water).
  • an alloy with the following weight composition If: 1%; Mg: 0.4%; Cu: 0.15%; Mn: 0.1%; rest Al and usual impurities having followed the same range of transformation and heat treatment as above, has the following characteristics in state T4:

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cookers (AREA)
  • Continuous Casting (AREA)
  • Conductive Materials (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Lead Frames For Integrated Circuits (AREA)

Claims (7)

  1. Aluminiumlegierung zur Herstellung tiefziehbarer Bleche, dadurch gekennzeichnet, daß ihre Zusammensetzung die folgende (in Gew.%) ist:
    - die Gehalte an Mg und Si liegen in einem Rechteck A'CDE' mit Koordinaten:
    Figure imgb0008
    - das Cu liegt im Bereich von 0,5 bis 0,8 %
    - die Elemente Cr und Zr jeweils unter 0,2 %
    - Mn < 0,3 %
    - Fe < 0,35 %
    - andere Elemente: jedes < 0,05 %, insgesamt < 0,15 %
    - Rest Al.
  2. Legierung nach dem Anspruch 1, dadurch gekennzeichnet, daß der Mn-Gehalt unter oder gleich 0,2 % ist und Cr und Zr jeweils < 0,05 % ist.
  3. Legierung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die mittlere Korngröße unter 80 µm und vorzugsweise unter 60 µm ist.
  4. Verfahren zum Erhalten der Produkte nach einem der Ansprüche 1 bis 3, das den kontinuierlichen oder halbkontinuierlichen Guß von Rohblöcken, eine eventuelle Homogenisierung, eine Warmverformung, eine eventuelle Kaltverformung, eine Lösungsglühung, ein Abschrecken, eine Formgebung, beispielsweise durch Tiefziehen, Falzen, Biegen, und schließlich ein Anlassen vorsieht, dadurch gekennzeichnet, daß die Endwarmverformung zwischen 270 und 320 °C erfolgt.
  5. Verfahren nach dem Anspruch 4, dadurch gekennzeichnet, daß die Homogenisierung oder die vollständige Lösungsglühung zwischen 520 und 560 °C durchgeführt werden.
  6. Verfahren nach dem Anspruch 5, dadurch gekennzeichnet, daß die Homogenisierung oder die Lösungsglühung zwischen 530 und 550 °C erfolgen.
  7. Verfahren nach einem der Ansprüche 5 oder 6, dadurch gekennzeichnet, daß der Lösungsglühung ein Temperaturanstieg mit einer Geschwindigkeit über 10 °C/s vorausgeht.
EP89420499A 1988-12-21 1989-12-19 Tiefziehbare Aluminiumlegierung, die Silicium, Magnesium und Kupfer enthält Expired - Lifetime EP0375572B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89420499T ATE90978T1 (de) 1988-12-21 1989-12-19 Tiefziehbare aluminiumlegierung, die silicium, magnesium und kupfer enthaelt.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8817621A FR2642436B1 (fr) 1988-12-21 1988-12-21 Alliage d'a1 contenant essentiellement du si, du mg et du cu pour emboutissage
FR8817621 1988-12-21

Publications (2)

Publication Number Publication Date
EP0375572A1 EP0375572A1 (de) 1990-06-27
EP0375572B1 true EP0375572B1 (de) 1993-06-23

Family

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EP89420499A Expired - Lifetime EP0375572B1 (de) 1988-12-21 1989-12-19 Tiefziehbare Aluminiumlegierung, die Silicium, Magnesium und Kupfer enthält

Country Status (5)

Country Link
EP (1) EP0375572B1 (de)
AT (1) ATE90978T1 (de)
DE (1) DE68907332T2 (de)
ES (1) ES2041438T3 (de)
FR (1) FR2642436B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2713664B1 (fr) * 1993-11-17 1996-05-24 Pechiney Rhenalu Alliage type Al-Si-Mg à ductilité et emboutissabilité améliorées et procédé d'obtention.
CH688379A5 (de) * 1994-11-29 1997-08-29 Alusuisse Lonza Services Ag Tiefziehbare und schweissbare Aluminiumlegierung vom Typ AlMgSi
FR2748035B1 (fr) * 1996-04-29 1998-07-03 Pechiney Rhenalu Alliage aluminium-silicium-magnesium pour carrosserie automobile
WO1997047779A1 (en) * 1996-06-14 1997-12-18 Aluminum Company Of America Highly formable aluminum alloy rolled sheet

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082578A (en) * 1976-08-05 1978-04-04 Aluminum Company Of America Aluminum structural members for vehicles
US4424084A (en) * 1980-08-22 1984-01-03 Reynolds Metals Company Aluminum alloy
JPS6055586B2 (ja) * 1982-11-30 1985-12-05 株式会社神戸製鋼所 ろう付用高強度耐蝕アルミニウム合金
US4614552A (en) * 1983-10-06 1986-09-30 Alcan International Limited Aluminum alloy sheet product
ATE68529T1 (de) * 1985-11-04 1991-11-15 Aluminum Co Of America Fahrzeugteil aus aluminiumlegierung.

Also Published As

Publication number Publication date
EP0375572A1 (de) 1990-06-27
ES2041438T3 (es) 1993-11-16
FR2642436B1 (fr) 1991-06-14
DE68907332T2 (de) 1993-11-11
DE68907332D1 (de) 1993-07-29
FR2642436A1 (fr) 1990-08-03
ATE90978T1 (de) 1993-07-15

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