EP0375572A1 - 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
EP0375572A1
EP0375572A1 EP89420499A EP89420499A EP0375572A1 EP 0375572 A1 EP0375572 A1 EP 0375572A1 EP 89420499 A EP89420499 A EP 89420499A EP 89420499 A EP89420499 A EP 89420499A EP 0375572 A1 EP0375572 A1 EP 0375572A1
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EP
European Patent Office
Prior art keywords
alloy
content
contents
transformation
dissolution
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
EP89420499A
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English (en)
French (fr)
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EP0375572B1 (de
Inventor
Daniel Ferton
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 Pechiney Rhenalu SA
Pechiney Rhenalu SAS
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Filing date
Publication date
Application filed by Cegedur Pechiney Rhenalu SA, Pechiney Rhenalu SAS filed Critical Cegedur Pechiney Rhenalu SA
Priority to AT89420499T priority Critical patent/ATE90978T1/de
Publication of EP0375572A1 publication Critical patent/EP0375572A1/de
Application granted granted Critical
Publication of EP0375572B1 publication Critical patent/EP0375572B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C22C21/06—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.
  • the alloy responding to the problem posed above has the following composition by weight:
  • the Mn content is further limited since this element has the following disadvantages in higher quantities: . It gives rise to the solidification of intermetallic compounds based on Fe, Mn, Si which reduce the deformation capacity of the alloy and can initiate decohesions and ruptures, during shaping operations; . It increases the critical quenching speed and therefore limits the possibilities of heat treatments for thick products; . It gives the alloy a fairly poor corrosion behavior; . It is not suitable for short-term homogenizations, such as those generally obtained in passage ovens.
  • 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: Yes 1.05% Mg 0.4% Cu 0.7% Mn 0.25% + Fe 0.24% Ti 0.035% Rest A1
  • 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: R 0.2 (MPa) Rm (MPa) AT (%) 100 205 26.5

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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)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Lead Frames For Integrated Circuits (AREA)
  • Conductive Materials (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
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
FR8817621 1988-12-21
FR8817621A FR2642436B1 (fr) 1988-12-21 1988-12-21 Alliage d'a1 contenant essentiellement du si, du mg et du cu pour emboutissage

Publications (2)

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

Family

ID=9373742

Family Applications (1)

Application Number Title Priority Date Filing Date
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)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014113A1 (fr) * 1993-11-17 1995-05-26 Pechiney Rhenalu Alliage de type aluminium-silicon-magnesium a ductilite et emboutissabilite ameliorees et procede d'obtention
EP0714993A1 (de) * 1994-11-29 1996-06-05 Alusuisse-Lonza Services AG Tiefziehbare und schweissbare Aluminiumlegierung vom Typ ALMgSi
FR2748035A1 (fr) * 1996-04-29 1997-10-31 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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2360684A1 (fr) * 1976-08-05 1978-03-03 Aluminum Co Of America Elements de structure ameliores en aluminium, pour vehicules automobiles
US4424084A (en) * 1980-08-22 1984-01-03 Reynolds Metals Company Aluminum alloy
US4614552A (en) * 1983-10-06 1986-09-30 Alcan International Limited Aluminum alloy sheet product
WO1987002712A1 (en) * 1985-11-04 1987-05-07 Aluminum Company Of America Aluminum alloy vehicular member
US4788037A (en) * 1982-11-30 1988-11-29 Kabushiki Kaisha Kobe Seiko Sho High strength, corrosion-resistant aluminum alloys for brazing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2360684A1 (fr) * 1976-08-05 1978-03-03 Aluminum Co Of America Elements de structure ameliores en aluminium, pour vehicules automobiles
US4424084A (en) * 1980-08-22 1984-01-03 Reynolds Metals Company Aluminum alloy
US4788037A (en) * 1982-11-30 1988-11-29 Kabushiki Kaisha Kobe Seiko Sho High strength, corrosion-resistant aluminum alloys for brazing
US4614552A (en) * 1983-10-06 1986-09-30 Alcan International Limited Aluminum alloy sheet product
WO1987002712A1 (en) * 1985-11-04 1987-05-07 Aluminum Company Of America Aluminum alloy vehicular member

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014113A1 (fr) * 1993-11-17 1995-05-26 Pechiney Rhenalu Alliage de type aluminium-silicon-magnesium a ductilite et emboutissabilite ameliorees et procede d'obtention
FR2713664A1 (fr) * 1993-11-17 1995-06-16 Pechiney Rhenalu Alliage type Al-Si-Mg à ductilité et emboutissabilité améliorées et procédé d'obtention.
EP0714993A1 (de) * 1994-11-29 1996-06-05 Alusuisse-Lonza Services AG Tiefziehbare und schweissbare Aluminiumlegierung vom Typ ALMgSi
CH688379A5 (de) * 1994-11-29 1997-08-29 Alusuisse Lonza Services Ag Tiefziehbare und schweissbare Aluminiumlegierung vom Typ AlMgSi
FR2748035A1 (fr) * 1996-04-29 1997-10-31 Pechiney Rhenalu Alliage aluminium-silicium-magnesium pour carrosserie automobile
WO1997041272A1 (fr) * 1996-04-29 1997-11-06 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

Also Published As

Publication number Publication date
FR2642436B1 (fr) 1991-06-14
ATE90978T1 (de) 1993-07-15
DE68907332T2 (de) 1993-11-11
DE68907332D1 (de) 1993-07-29
EP0375572B1 (de) 1993-06-23
FR2642436A1 (fr) 1990-08-03
ES2041438T3 (es) 1993-11-16

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