EP0896637B2 - Verwendung einer aluminium-silizium-magnesium-legierung zur herstellung von fahrzeugkarrosserieteilen und verfahren dieser herstellung. - Google Patents

Verwendung einer aluminium-silizium-magnesium-legierung zur herstellung von fahrzeugkarrosserieteilen und verfahren dieser herstellung. Download PDF

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Publication number
EP0896637B2
EP0896637B2 EP97921897A EP97921897A EP0896637B2 EP 0896637 B2 EP0896637 B2 EP 0896637B2 EP 97921897 A EP97921897 A EP 97921897A EP 97921897 A EP97921897 A EP 97921897A EP 0896637 B2 EP0896637 B2 EP 0896637B2
Authority
EP
European Patent Office
Prior art keywords
alloy
manufacturing
alloys
temperature
strip
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 - Lifetime
Application number
EP97921897A
Other languages
English (en)
French (fr)
Other versions
EP0896637B1 (de
EP0896637A1 (de
Inventor
Jean-Christophe Ehrström
Christophe Sigli
Georges Pillet
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
JFE Steel Corp
Furukawa Electric Co Ltd
Kaiser Aluminum and Chemical Corp
Original Assignee
Pechiney Rhenalu SAS
JFE Steel Corp
Furukawa Electric Co Ltd
Kaiser Aluminum and Chemical Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9491836&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0896637(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Pechiney Rhenalu SAS, JFE Steel Corp, Furukawa Electric Co Ltd, Kaiser Aluminum and Chemical Corp filed Critical Pechiney Rhenalu SAS
Publication of EP0896637A1 publication Critical patent/EP0896637A1/de
Publication of EP0896637B1 publication Critical patent/EP0896637B1/de
Application granted granted Critical
Publication of EP0896637B2 publication Critical patent/EP0896637B2/de
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Classifications

    • 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
    • C22F1/043—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 silicon as the next major constituent
    • 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
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • 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
    • 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
    • C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
    • 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 the field of aluminum alloys of the AlSiMg type, or alloys of the 6000 series according to the classification of the Aluminum Association, intended in particular for the manufacture of automobile body parts, for which the final income of the alloy is done during the cooking operation of the paint.
  • AlSiMg alloy plates have been used for many years automotive bodywork because they have good formability before curing, an absence of Lüders lines for stamping and high mechanical strength after a heat treatment comprising dissolution, quenching, ripening and tempering.
  • This hardening income can be advantageously during the baking operation of the paint applied to the bodywork element, this which saves a specific treatment. This is usually referred to as a hardening effect cooking, or in English "bake hardening”.
  • US Patent 4082578 to ALCOA discloses automotive body composition alloys (% by weight): Si: 0.4 - 1.2 Mg: 0.4 - 1.1 Cu: 0.1 - 0.6 Fe: 0.05 - 0.35 with addition of one or more of Mn, Cr or Zr. Alloys of this type have been registered at Aluminum Association under the designations 6009 and 6010. The hardening income of these alloys is effected in a manner between 190 and 205 ° C.
  • US Patent 4589932 also from ALCOA, relates to an alloy, subsequently registered under the designation AA 6013, of composition: If: 0.4 - 1.2 Mg: 0.5-1.3 Cu: 0.6-1.1 Mn: 0.1- 1.0 and advocates an income of 2 to 15 h at a temperature greater than 182 ° C.
  • This alloy has better mechanical strength and indentation resistance than 6009 or 6010, as well as a more stable cure response.
  • US Pat. No. 4,614,552 to ALCAN relates to the AA 6111 alloy of composition: If: 0.6 - 1.0 Mg: 0.62 - 0.82 Cu: 0.65 - 0.79 Mn: 0.1 - 0.5 Fe ⁇ 0.4
  • This alloy has a mechanical strength greater than 6009 and a formability greater than 6010, as well as a good response to the curing of the paint, which the patent recommends to carry out during about 1 h at 177-204 ° C.
  • FIG. 2 of the patent compares, for alloys 6009, 6010 and 6111, the curves of the elastic limit as a function of the curing temperature at different rates of deformation, and clearly shows at 150 ° C, hardening has not yet started in any of the cases shown and is not starting to significant than above 180 ° C.
  • US Pat. No. 4,840,852 to ALCOA relates to an alloy with a higher copper content, which explains its designation.
  • AA 2008 in the category of alloys Al-Cu of the series 2000. It has for composition: Si: 0,5 - 0,85 Mg: 0.25 - 0.55 Cu: 0.75 - 1.10 Fe: 0.05 - 0.4.
  • the preferred range for income is 177 - 218 ° C, and more specifically, the range 190 - 204 ° C. The only example is an income of 204 ° C.
  • the international application WO 95/14113 of the Applicant relates to a range of alloys of composition: Si: 0.5-1.3 Mg: 0.25-0.8 Cu ⁇ 0.9 Mn: 0.1-0.8 Fe ⁇ 0.5, with fine manganese precipitates of type Al (Mn, Fe) Si and advocates a precondition between quenching and maturation.
  • the examples all indicate a 30 minutes at 180 ° C.
  • the object of the present invention is to select, in Al-Si-Mg-Cu alloys, a narrow domain of composition which allows both to achieve sufficient mechanical strength after baking at 150 - 155 ° C and to put the alloy in solution easily.
  • the subject of the invention is the use of an aluminum alloy for the manufacture of exterior parts of automobile bodywork, of composition (% by weight): If: 0.5 -0 8 Mg: between 0.50 and 0.60 Cu: between 0.60 and 0.70 Mn and / or Cr: 0.1 - 0.3 remains aluminum with unavoidable impurities, with: 1.6 ⁇ Si + Mg + Cu ⁇ 2
  • the composition range of the alloys according to the invention is, for Si and Mg, within the domain 6009/6010, but with a higher copper content. Compared to the 6111 domain, it is less busy in magnesium, whereas on the contrary it is more compared to 2008. But its main characteristic is to have, for compared to recent high strength bodywork alloys and good formability, a total amount of of addition, represented by the sum Si + Mg + Cu, lower. This feature allows for homogenization and solution dissolution under easier conditions, but in the narrow composition field of the invention, this reduction does not cause, as one would expect, a decrease in mechanical strength on the finished part after a short dissolution in solution and an income practiced during a paint baking at 150 ° C.
  • the alloy according to the invention is cast in the form of plates, homogenized between 500 and 580 ° C., hot rolled to a thickness of between 10 and 3 mm, then cold rolled to the final thickness, generally included, for automotive bodywork applications, between 0.8 and 1.5 mm.
  • An annealing of 1 h to 10 h between 300 and 500 ° C can be applied to the strip after hot rolling or during cold rolling.
  • the dissolution of the strip is between 500 and 560 ° C for a period of between 20 seconds and 2 minutes. It is followed by quenching and maturing at room temperature for more than a week.
  • the body parts generally shaped by stamping and covered with paint, are subjected to a paint-baking operation at a temperature below 170 ° C, most often around 150 ° C, and the resulting income by this cooking makes it possible to reach the piece with an elastic limit R 0.2 > 170 MPa.
  • compositions according to the invention thus lead to a complete dissolution, favorable to the formability sheet metal, in a time compatible with the industrial requirements of productivity.
  • mechanical resistance, after this short dissolution and a revenue associated with baking paints to 150 at 155 ° C. is of the same order, and sometimes even better, than that of alloys of the prior art which are nevertheless more in addition elements.
  • the alloys A and B are in accordance with the invention, the sum Si + Mg + Cu being respectively 1.71 and 1.91.
  • Alloy F, of the AA 6013 type has a Mg content> 0.65.
  • the plates then followed a hot rolling simulation annealing by holding for 9 h at 500 ° C and cooling at a rate of 25 ° C / h.
  • Cold rolling was then carried out to the thickness of 1 mm, then to a solution in a salt bath, partly at 550 ° C., and partly at 525 ° C., for respective periods of time. 30, 60, 300 and 1800 s, and finally to a quench.
  • a solution in a salt bath partly at 550 ° C., and partly at 525 ° C., for respective periods of time. 30, 60, 300 and 1800 s, and finally to a quench.
  • the homogenization one can appreciate the quality of the solution solution by differential enthalpic analysis of the samples put in solution.
  • the 2 alloys according to the invention have a peak area less than the other 4, which shows a better solution in solution.
  • the dissolved samples were then matured at room temperature for 3 weeks, a traction at 2% of deformation and a return in oil bath of 20 mn to 155 ° C.
  • the increase the dissolution time does not lead to a significant increase in mechanical strength.
  • the maximum elastic limit is reached for a treatment of 30 s at 525 ° C for alloy A, and for a treatment from 30 s to 550 ° C for alloy B.
  • dissolution is not complete after 1800 s at 550 ° C for alloys C and D. This incomplete dissolution is detrimental to the formability.
  • the elastic limit of alloy A is of the same order as that of D, and that of B is greater than that of C and D, while the alloys A and B are less loaded in elements of addition that the alloys C and D (sum Si + Mg + Cu lower).
  • alloy A has the same level of elastic limit as the alloys C, D and F, whereas is significantly less charged with hardening additives, and surprisingly, alloy B has a limit elasticity greater than that of alloys C to F.

Claims (3)

  1. Verwendung einer Aluminiumlegierung der Zusammensetzung (Gew.-%):
    Si: 0,5 - 0,8 Mg: 0,50 bis 0,60 Cu: 0,60 bis 0,70 Mn und/oder Cr: 0,1 - 0,3 Rest Aluminium mit den unvermeidbaren Verunreinigungen, mit: 1,6 < Si + Mg + Cu < 2,0
    für die Herstellung von Fahrzeugkarosserie-Außenteilen.
  2. Verfahren zur Herstellung eines lackierten Karosserieteils aus Aluminiumlegierung, umfassend:
    das Gießen einer Platte aus der Legierung der Zusammensetzung (Gew.-%):
    Si: 0,5 - 0,8 Mg: 0,50 bis 0,60 Cu: 0,60 bis 0,70 Mn und/oder Cr: 0,1 - 0,3 Rest Aluminium mit den unvermeidbaren Verunreinigungen, mit: 1,6 < Si + Mg + Cu < 2,0,
    das Homogenisieren dieser Platte bei einer Temperatur zwischen 500 und 580°C,
    das Warmwalzen der Platte zu einem Band von 10 mm bis 3 mm Dicke, gefolgt von einem Kaltwalzen auf eine Dicke von 0,8 bis 1,5 mm,
    das Lösungsglühen des Walzbandes bei einer Temperatur zwischen 500 und 560°C während 20 s bis 2 min, gefolgt von einem Abschrecken und einer mehr als einwöchigen Kaltauslagerung bei Raumtemperatur,
    das Herstellen eines Teils aus diesem Band und seine Beschichtung mit flüssigem Lack,
    das Einbrennen dieses Lacks bei einer Temperatur zwischen 150 und 170°C.
  3. Verfahren nach Anspruch 2, bei dem das Band nach dem Warmwalzen oder während des Kaltwalzens einer ein- bis zehnstündigen Glühung zwischen 300 und 500°C unterworfen wird.
EP97921897A 1996-04-29 1997-04-28 Verwendung einer aluminium-silizium-magnesium-legierung zur herstellung von fahrzeugkarrosserieteilen und verfahren dieser herstellung. Expired - Lifetime EP0896637B2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9605595 1996-04-29
FR9605595A FR2748035B1 (fr) 1996-04-29 1996-04-29 Alliage aluminium-silicium-magnesium pour carrosserie automobile
PCT/FR1997/000755 WO1997041272A1 (fr) 1996-04-29 1997-04-28 Alliage aluminium-silicium-magnesium pour carrosserie automobile

Publications (3)

Publication Number Publication Date
EP0896637A1 EP0896637A1 (de) 1999-02-17
EP0896637B1 EP0896637B1 (de) 2000-05-24
EP0896637B2 true EP0896637B2 (de) 2005-07-27

Family

ID=9491836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97921897A Expired - Lifetime EP0896637B2 (de) 1996-04-29 1997-04-28 Verwendung einer aluminium-silizium-magnesium-legierung zur herstellung von fahrzeugkarrosserieteilen und verfahren dieser herstellung.

Country Status (5)

Country Link
EP (1) EP0896637B2 (de)
DE (1) DE69702133T3 (de)
ES (1) ES2146467T5 (de)
FR (1) FR2748035B1 (de)
WO (1) WO1997041272A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2855083B1 (fr) * 2003-05-20 2006-05-26 Pechiney Rhenalu Procede de fabrication de pieces en alliage d'aluminium soudees par friction
FR2856368B1 (fr) * 2003-06-18 2005-07-22 Pechiney Rhenalu Piece de peau de carrosserie automobile en tole d'alliage ai-si-mg fixee sur structure acier
DE102004035043A1 (de) * 2004-07-20 2006-04-13 Daimlerchrysler Ag Verfahren zum Umformen eines Leichtmetall-Blechs und entsprechendes Leichtmetall-Blechbauteil
EP2096187A1 (de) 2008-02-28 2009-09-02 Georg Fischer Engineering AG Verfahren zum gleichzeitigen Wärmebehandeln und Beschichten eines Aluminiumbauteils sowie nach dem Verfahren hergestelltes Bauteil
EP3842561B1 (de) * 2019-12-23 2022-08-17 Novelis Koblenz GmbH Verfahren zur herstellung eines walzprodukts aus aluminiumlegierung

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3682059D1 (de) * 1985-11-04 1991-11-28 Aluminum Co Of America Fahrzeugteil aus aluminiumlegierung.
FR2601040B1 (fr) * 1986-07-07 1988-09-02 Cegedur Alliage d'aluminium chaudronnable et soudable et son procede de fabrication
FR2642436B1 (fr) * 1988-12-21 1991-06-14 Pechiney Rhenalu Alliage d'a1 contenant essentiellement du si, du mg et du cu pour emboutissage
JP2700838B2 (ja) * 1991-01-25 1998-01-21 スカイアルミニウム株式会社 自動車ホイールリム用のロール成形加工用アルミニウム合金圧延板の製造方法
JPH05125506A (ja) * 1991-10-31 1993-05-21 Furukawa Alum Co Ltd 焼付け硬化性成形用アルミニウム合金板の製造方法
JPH05306440A (ja) * 1992-04-30 1993-11-19 Furukawa Alum Co Ltd 焼付硬化性に優れた成形用アルミニウム合金板の製造方法
JPH0747808B2 (ja) * 1993-02-18 1995-05-24 スカイアルミニウム株式会社 成形性および焼付硬化性に優れたアルミニウム合金板の製造方法
JP3443866B2 (ja) * 1993-04-02 2003-09-08 ヤマハ株式会社 ペダル鍵盤構造
US5616189A (en) * 1993-07-28 1997-04-01 Alcan International Limited Aluminum alloys and process for making aluminum alloy sheet
FR2713664B1 (fr) * 1993-11-17 1996-05-24 Pechiney Rhenalu Alliage type Al-Si-Mg à ductilité et emboutissabilité améliorées et procédé d'obtention.
JPH07197219A (ja) * 1993-12-28 1995-08-01 Furukawa Electric Co Ltd:The 成形用アルミニウム合金板材の製造方法
JPH0860285A (ja) * 1994-06-16 1996-03-05 Furukawa Electric Co Ltd:The アルミニウム合金製バンパー補強材およびその製造方法
US5662750A (en) * 1995-05-30 1997-09-02 Kaiser Aluminum & Chemical Corporation Method of manufacturing aluminum articles having improved bake hardenability

Also Published As

Publication number Publication date
ES2146467T5 (es) 2006-03-01
FR2748035B1 (fr) 1998-07-03
FR2748035A1 (fr) 1997-10-31
WO1997041272A1 (fr) 1997-11-06
DE69702133T2 (de) 2000-11-09
EP0896637B1 (de) 2000-05-24
EP0896637A1 (de) 1999-02-17
DE69702133D1 (de) 2000-06-29
DE69702133T3 (de) 2006-04-20
ES2146467T3 (es) 2000-08-01

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