EP0259232B1 - Gut bearbeitbare und schweissbare Aluminiumlegierung und Verfahren zu ihrer Herstellung - Google Patents

Gut bearbeitbare und schweissbare Aluminiumlegierung und Verfahren zu ihrer Herstellung Download PDF

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Publication number
EP0259232B1
EP0259232B1 EP87420190A EP87420190A EP0259232B1 EP 0259232 B1 EP0259232 B1 EP 0259232B1 EP 87420190 A EP87420190 A EP 87420190A EP 87420190 A EP87420190 A EP 87420190A EP 0259232 B1 EP0259232 B1 EP 0259232B1
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Prior art keywords
alloy
solution treatment
delimited
homogenisation
trapezium
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EP87420190A
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English (en)
French (fr)
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EP0259232A1 (de
EP0259232B2 (de
Inventor
Didier Constant
Gilbert Gutmann
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Constellium Issoire SAS
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Pechiney Rhenalu SAS
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Priority to AT87420190T priority Critical patent/ATE64763T1/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

Definitions

  • the invention relates to a weldable boilermaking aluminum alloy containing essentially Si, Mg and Cu and to its manufacturing process.
  • alloys of the 6000 series according to the nomenclature of the Aluminum Association have been developed essentially in the form of profiles, although some of these alloys such as 6061 or 6082, are commonly found in the form of sheets or strips, intended for the stamping.
  • Patent application FR 2 375 332 describes a process in which an alloy rich in Si is treated so as to obtain a fine sub-micron precipitation (0.1 to 0.5 ⁇ m) of Si in supersaturation; this size is intermediate between the eutectic phases present in the alloy and that of the hardening phases usually observed in AI-Si-Mg-Cu alloys.
  • French patent application FR 2 360 684 describes an AI-Si-Mg-Cu alloy containing at least one of the recrystallization inhibiting elements from the group Mn, Cr, Zr.
  • the alloy comprises (in% by weight) contents of Si and Mg defined by the trapezoid of coordinates: remains AI.
  • the maximum Si / Mg ratio (BC side of the trapezoid) remains equal to or greater than 2.6 approximately so as to limit the precipitation of Mg 2 Si during solidification as much as possible.
  • the fine precipitation Mg 2 Si present in the alloy results only from the heat treatments undergone.
  • the secondary elements are limited for the following reasons: As explained above, the presence of Mn is not desirable; however, it has been admitted up to 0.2% maximum due to possible contamination in this element, due to the recycling of waste. It should be noted that the alloy does not contain intentional additions of Cr and / or Zr.
  • the Ti associated with B controls, as is known, the fineness of the primary crystallization of the raw casting products (plates, strips, billets, etc.) and allows shorter homogenizations and solutions, in particular in which concerns the processing of flat products (sheets, strips).
  • the effective contents are Ti ⁇ 0.1% and B ⁇ 0.05%.
  • the Fe content is limited to 0.35% to avoid the formation of coarse primary compounds containing Fe (AIMnFeSi type).
  • a preferred composition of the alloy according to the invention (% by weight) is as follows: content of Si and Mg included in the trapezium having for apex: the limits of the other elements being the same.
  • Another preferred composition of the alloy according to the invention corresponds to the contents of Si and Mg, delimited by the trapezoid A'B'C'D 'of FIG. 1 with Cu: 0.1-0.25 and Mn ⁇ 0.15, the limits of the other elements being the same.
  • the range of manufacturing of the alloys according to the invention generally comprises the continuous or semi-continuous casting of blanks, possible homogenization, hot transformation, possible cold transformation, dissolution and tempering.
  • homogenization at high temperature between 550 C and 570 C with a holding time of 6 to 24 hours is desirable. Homogenization is preferably preceded by a slow rise in temperature.
  • the hot transformation is carried out by any known means (rolling, spinning, forging, etc.). However, this must then be carried out so as to avoid coarse recrystallizations during the operation.
  • the temperature at the end of hot transformation to avoid these recrystallizations, must imperatively be between 270 and 340 ° C.
  • the alloy After possible cold transformation, the alloy is put into a complete solution. This takes place in the temperature range between 540 and 580 C, preferably between 550 and 570 C, targeting the temperature of 560 ° C.
  • the rise in temperature before solution must be fast (V k 10. C / sec) and the setting solution is preferably performed in a 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 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, under the usual conditions; the hardening is due to the precipitation of the Mg 2 Si phase and of the complex phases AICuMg, AICuMg Si.
  • the tempering is typically carried out between 8 to 12 h around 165 C.
  • FIG. 1 represents the field of composition of the elements Si and Mg of the alloy
  • FIG. 2 represents the field of dissolution or homogenization of an alloy according to the invention, on a vertical section of the state diagram AI, Mg, Si at 0.2% Mg.
  • Dissolution (or homogenization) must be carried out in the single-phase field and in particular under the temperature conditions represented by the rectangle FGHI for the general range and F'G'H'l 'for the preferred range.
  • This heat treatment therefore requires a precise industrial tool.
  • the dissolution of these was carried out in a passage oven at a speed of 20 m / min, the time for keeping at temperature of 560 ° C. being of the order of 1 minute and the rate of temperature rise of around 25 ° C / sec.
  • the anisotropy was estimated by making buckets and measuring the rate of the horns according to the AFNOR NF-A-50-301 standard. This value is equal to 7%.
  • the grain size measured by metallography is 40 ⁇ m.
  • Sheets cut from the dissolved metal were finished by shaping parts of the automobile body, in this case a front cover.
  • the assembly was then brought, in an oven, to 165 ° C for 10 h.
  • the shear strength of the welded joints thus obtained is of the order of 280 MPa. We can see the good properties obtained after welding and tempering.
  • the metal undergoes after quenching only the finishing operations (such as dressing, leveling, etc.) which are strictly necessary.
  • the alloys according to the invention are mainly used in the fields of automobile bodywork and the bodywork.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Arc Welding In General (AREA)
  • Heat Treatment Of Steel (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Heat Treatment Of Articles (AREA)
  • Filtering Materials (AREA)
  • Mold Materials And Core Materials (AREA)

Claims (11)

1. Tiefziehbare und schweißbare Aluminiumlegierung,
dadurch gekennzeichnet,
daß sie (in Gew.%) Si- und Mg-Gehalte, die durch das Trapez ABCD begrenzt sind, dessen Koordinaten sind:
Figure imgb0009
Figure imgb0010
2. Legierung nach dem Anspruch 1,
dadurch gekennzeichnet,
daß sie (in Gew.%) Si- und Mg-Gehalte, die durch das Trapez A"B"C"D" begrenzt sind, dessen Koordinaten sind:
Figure imgb0011
3. Legierung nach dem Anspruch 1,
dadurch gekennzeichnet,
daß sie (in Gew.%) Si- und Mg-Gehalte, die durch das in der Figur 1 dargestellte Trapez A'B'C'D' begrenzt sind, sowie Cu 0,1 - 0,25 und Mn ≦ 0,15 enthält.
4. Legierung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die mittlere Korngröße unter 80 µm ist.
5. Legierung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die mittlere Korngröße unter 60 µm ist.
6. Verfahren zur Herstellung der Erzeugnisse nach einem der Ansprüche 1 bis 5, das den Strangguß oder halbkontinuierlichen Guß von Rohlingen, eine eventuelle Homogenisierung, eine Warmverformung, eine eventuelle Kaltverformung, ein Lösungsglühen, ein Abschrecken, eine Kaltformgebung und schließlich ein Anlassen umfaßt,
dadurch gekennzeichnet,
daß die Endwarmverformung zwischen 270 und 340 ° C stattfindet.
7. Verfahren nach dem Anspruch 6,
dadurch gekennzeichnet,
daß die Homogenisierung oder das vollständige Lösungsglühen zwischen 540 und 580 ° C durchgeführt werden.
8. Verfahren nach dem Anspruch 7,
dadurch gekennzeichnet,
daß die Homogenisierung oder das Lösungsglühen zwischen 550 und 570 ° C stattfinden.
9. Verfahren nach einem der Ansprüche 7 oder 8,
dadurch gekennzeichnet,
daß dem Lösungsglühen ein Temperaturanstieg mit einer Geschwindigkeit über 10 C/s vorausgeht.
EP87420190A 1986-07-07 1987-07-02 Gut bearbeitbare und schweissbare Aluminiumlegierung und Verfahren zu ihrer Herstellung Expired - Lifetime EP0259232B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87420190T ATE64763T1 (de) 1986-07-07 1987-07-02 Gut bearbeitbare und schweissbare aluminiumlegierung und verfahren zu ihrer herstellung.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR8610028A FR2601040B1 (fr) 1986-07-07 1986-07-07 Alliage d'aluminium chaudronnable et soudable et son procede de fabrication
FR8610028 1986-07-07
CA000552025A CA1340260C (fr) 1986-07-07 1987-11-17 Alliage d'aluminium chaudronnable et soudable et son procede de fabrication

Publications (3)

Publication Number Publication Date
EP0259232A1 EP0259232A1 (de) 1988-03-09
EP0259232B1 true EP0259232B1 (de) 1991-06-26
EP0259232B2 EP0259232B2 (de) 1998-01-28

Family

ID=25671592

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87420190A Expired - Lifetime EP0259232B2 (de) 1986-07-07 1987-07-02 Gut bearbeitbare und schweissbare Aluminiumlegierung und Verfahren zu ihrer Herstellung

Country Status (7)

Country Link
US (1) US4814022A (de)
EP (1) EP0259232B2 (de)
CA (1) CA1340260C (de)
DE (1) DE3771017D1 (de)
ES (1) ES2022918T5 (de)
FR (1) FR2601040B1 (de)
GR (2) GR3002191T3 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9318041D0 (en) * 1993-08-31 1993-10-20 Alcan Int Ltd Extrudable a1-mg-si alloys
FR2713664B1 (fr) * 1993-11-17 1996-05-24 Pechiney Rhenalu Alliage type Al-Si-Mg à ductilité et emboutissabilité améliorées et procédé d'obtention.
US5525169A (en) * 1994-05-11 1996-06-11 Aluminum Company Of America Corrosion resistant aluminum alloy rolled sheet
US5919323A (en) * 1994-05-11 1999-07-06 Aluminum Company Of America Corrosion resistant aluminum alloy rolled sheet
CH688379A5 (de) * 1994-11-29 1997-08-29 Alusuisse Lonza Services Ag Tiefziehbare und schweissbare Aluminiumlegierung vom Typ AlMgSi
US5582660A (en) * 1994-12-22 1996-12-10 Aluminum Company Of America Highly formable aluminum alloy rolled sheet
US6267922B1 (en) 1995-09-19 2001-07-31 Alcan International Limited Precipitation-hardened aluminum alloys for automotive structural applications
FR2748035B1 (fr) * 1996-04-29 1998-07-03 Pechiney Rhenalu Alliage aluminium-silicium-magnesium pour carrosserie automobile
CH690916A5 (de) * 1996-06-04 2001-02-28 Alusuisse Tech & Man Ag Tiefziehbare und schweissbare Aluminiumlegierung vom Typ AlMgSi.
EP0931170A1 (de) * 1996-09-30 1999-07-28 Alcan International Limited Aluminiumlegierung zum walzen
US6780259B2 (en) * 2001-05-03 2004-08-24 Alcan International Limited Process for making aluminum alloy sheet having excellent bendability
FR2835533B1 (fr) * 2002-02-05 2004-10-08 Pechiney Rhenalu TOLE EN ALLIAGE Al-Si-Mg POUR PEAU DE CARROSSERIE AUTOMOBILE
US6959476B2 (en) * 2003-10-27 2005-11-01 Commonwealth Industries, Inc. Aluminum automotive drive shaft
FR2979576B1 (fr) 2011-09-02 2018-07-20 Constellium France Tole plaquee pour carrosserie automobile
DE202011110888U1 (de) 2011-11-11 2017-01-24 Novelis Inc. Aluminiumlegierung
WO2013068533A1 (en) 2011-11-11 2013-05-16 Novelis Inc. Aluminium alloy
ES2501041T5 (es) 2011-11-11 2018-11-13 Novelis, Inc. Aleación de aluminio
MX2021010903A (es) 2019-03-13 2021-10-01 Novelis Inc Aleaciones de aluminio endurecibles por envejecimiento y altamente formables y metodos para hacer las mismas.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149001A (en) * 1962-04-05 1964-09-15 Aluminum Co Of America Enameled aluminous metal product
US3370943A (en) * 1965-11-04 1968-02-27 Kaiser Aluminium Chem Corp Aluminum alloy
US4082578A (en) * 1976-08-05 1978-04-04 Aluminum Company Of America Aluminum structural members for vehicles
CH624147A5 (de) * 1976-12-24 1981-07-15 Alusuisse
FR2446865A1 (fr) * 1979-01-16 1980-08-14 Pechiney Aluminium Alliage d'aluminium type a-gs a resistance mecanique et tenacite elevees

Also Published As

Publication number Publication date
GR3026104T3 (en) 1998-05-29
FR2601040B1 (fr) 1988-09-02
ES2022918T5 (es) 1998-03-16
GR3002191T3 (en) 1992-12-30
DE3771017D1 (de) 1991-08-01
EP0259232A1 (de) 1988-03-09
CA1340260C (fr) 1998-12-15
EP0259232B2 (de) 1998-01-28
FR2601040A1 (fr) 1988-01-08
US4814022A (en) 1989-03-21
ES2022918B3 (es) 1991-12-16

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