EP0896637B1 - Aluminium - silizium - magnesium - legierung für fahrzeugkarrosserieblech - Google Patents

Aluminium - silizium - magnesium - legierung für fahrzeugkarrosserieblech Download PDF

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Publication number
EP0896637B1
EP0896637B1 EP97921897A EP97921897A EP0896637B1 EP 0896637 B1 EP0896637 B1 EP 0896637B1 EP 97921897 A EP97921897 A EP 97921897A EP 97921897 A EP97921897 A EP 97921897A EP 0896637 B1 EP0896637 B1 EP 0896637B1
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EP
European Patent Office
Prior art keywords
alloy
alloys
temperature
strip
composition
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
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English (en)
French (fr)
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EP0896637A1 (de
EP0896637B2 (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
Furukawa Electric Co Ltd
Kawasaki Steel Corp
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.)
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Application filed by Pechiney Rhenalu SAS, Furukawa Electric Co Ltd, Kawasaki Steel Corp, Kaiser Aluminum and Chemical Corp filed Critical Pechiney Rhenalu SAS
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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 especially to the manufacture of automobile body parts, for which the final income of the alloy is done during the paint curing operation.
  • AlSiMg alloy sheets have been used for many years for the manufacture of exterior elements of automobile bodywork because they have a good formability before hardening, absence of Lüders lines at deep drawing and high mechanical strength after heat treatment comprising dissolution, quenching, maturation and tempering hardening.
  • This hardening income can advantageously be obtained during the paint curing operation applied to the body element, which saves a specific treatment. This is what we usually call by hardening effect during cooking, or in English "bake hardening".
  • 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 recommends an income of 2 to 15 h at a temperature above 182 ° C.
  • This alloy has better mechanical strength and better indentation resistance than 6009 or 6010, as well as a more stable response to hardening.
  • US Patent 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 resistance greater than 6009 and a formability greater than 6010, as well as a good response to the curing by baking of the painting, which the patent recommends to carry out for approximately 1 h between 177 and 204 ° C.
  • FIG. 2 of the patent compares, for the alloys 6009, 6010 and 6111, the curves of the yield strength as a function of the curing temperature at different rates of deformation, and clearly shows that at 150 ° C, hardening has not yet started in any of the cases shown and it doesn't start to be significant only above 180 ° C.
  • ALCOA patent US 4,840,852 relates to an alloy with a higher copper content, this which explains its designation AA 2008 in the category of Al-Cu alloys of the series 2000. Its composition is: Si: 0.5 - 0.85 Mg: 0.25 - 0.55 Cu: 0.75 - 1.10 Fe: 0.05 - 0.4.
  • the preferred range for tempering is 177 - 218 ° C, and above specifically, the range 190 - 204 ° C. The only example indicates an income at 204 ° C.
  • the applicant's international application WO 95/14113 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 Al type (Mn, Fe) If and recommends a pre-income between hardening and maturation. Examples show all an income of 30 min at 180 ° C.
  • the aim of the present invention is to select, in Al-Si-Mg-Cu alloys, a narrow range of composition which allows both to achieve resistance sufficient mechanical after firing around 150 - 155 ° C and put the alloy in easy solution.
  • the subject of the invention is an aluminum alloy capable of being used for the manufacture of exterior parts of automobile bodywork, of composition (% by weight): If: 0.5 -0 8 Mg: 0.45 - 0.65 Cu: 0.55 - 0.75 Mn and / or Cr: 0.1 - 0.3 aluminum remains with the inevitable impurities, with: 1, 6 ⁇ Si + Mg + Cu ⁇ 2
  • Mg is between 0.50 and 0.60% and Cu between 0.60 and 0.70%.
  • the range of composition of the alloys according to the invention is, for Si and Mg, at inside the range 6009/6010, but with a higher copper content. Through compared to the 6111 domain, it is less loaded with magnesium, whereas on the contrary it is more so than in 2008. But its main characteristic is to have, for compared to recent body alloys with high resistance and good formability, a total quantity of addition elements, represented by the sum Si + Mg + Cu, plus low. This feature allows homogenization and implementation solution under easier conditions, but, in the area of narrow composition of the invention, this reduction does not lead, as might have been expected, to a reduction in mechanical resistance on the finished part after dissolving short and an income practiced during a paint curing around 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 between 10 and 3 mm, then rolled to cold to final thickness, generally included, for bodywork applications automotive, between 0.8 and 1.5 mm. Annealing from 1 h to 10 h between 300 and 500 ° C can be applied to the strip after hot rolling or during cold rolling.
  • the strip is dissolved between 500 and 560 ° C for a period of between 20 s and 2 min. It is followed by quenching and maturing at room temperature for more than a week.
  • the bodywork parts generally shaped by stamping and covered with paint, are subjected to an operation of baking the paint at a temperature below 170 ° C, most often around 150 ° C, and the income caused by this cooking, an elastic limit R 0.2 > 170 MPa can be reached on the part.
  • compositions according to the invention thus lead to complete dissolution, favorable to the formability of the sheet, within a period compatible with the requirements industrial productivity.
  • mechanical strength, after this short dissolution and an income associated with cooking the paintings towards 150 to 155 ° C is of the same order, and even sometimes better, than that of alloys of the prior art, however, more loaded with addition elements.
  • the alloys A and B are in accordance with the invention, the sum Si + Mg + Cu being 1.71 and 1.91 respectively.
  • Alloy F, type AA 6013 has an Mg content> 0.65.
  • the plates were homogenized for 24 h at a temperature of 555 ° C for the alloy C and 570 ° C for the other 5.
  • the efficiency of this homogenization can be assessed, in a manner known per se, by a differential enthalpy analysis (AED) on the homogenized plates. Indeed, if the homogenization is well done, this analysis leads to low peak areas (measured in J / g) and to high peak start temperatures.
  • the results obtained were as follows (Table 2): Alloy Peak area (J / g) Temperature (° C) AT - 0.015 580 B - 0.088 568 VS - 1.52 563 D - 1.04 575 E - 0.075 563 F - 0.33 580
  • the 2 alloys according to the invention have a lower peak area than the other 4, which indicates that their homogenization has been more complete.
  • the plates then followed a simulated annealing of the hot rolling by maintaining for 9 h at 500 ° C and cooling at a speed of 25 ° C / h. Then cold rolling to the thickness of 1 mm was carried out, followed by dissolution in a salt bath, partly at 550 ° C, and partly at 525 ° C, for respective durations of 30, 60, 300 and 1800 s, and finally to a hardening.
  • the quality of the solution can be assessed by differential enthalpy analysis of the samples in solution. The results of this analysis are as follows for a dissolution of 30 s at 550 ° C.
  • the 2 alloys according to the invention have a peak area less than 4 others, which shows a better solution.
  • the elastic limit of the alloy A is of the same order as that of D, and that of B is greater than that of C and D, then that alloys A and B are less loaded with additives than alloys C and D (lower Si + Mg + Cu sum).
  • alloy A has the same level of elastic limit as the alloys C, D and F, while it is significantly less loaded with addition elements hardening, and that, surprisingly, alloy B has an elastic limit higher than that of alloys C to F.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Conductive Materials (AREA)
  • Paints Or Removers (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Cookers (AREA)

Claims (5)

  1. Aluminiumlegierung, insbesondere zur Herstellung von Fahrzeugkarosserieblechteilen, mit der Zusammensetzung (in % der Masse):
    Si : 0,5 - 0,8
    Mg : 0,45 - 0,65
    Cu : 0,55 - 0,75
    Mn und/oder Cr: 0,1 - 0,3
    Rest Aluminium mit den unvermeidbaren Verunreinigungen,
    mit 1,6 < Si + Mg + Cu < 2,0.
  2. Aluminiumlegierung nach Anspruch 1, dadurch gekennzeichnet, dass Mg im Bereich von 0,50 bis 0,60% liegt.
  3. Aluminiumlegierung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass Cu im Bereich von 0,60 und 0,70% liegt.
  4. Verfahren zur Herstellung eines lackierten Karosserieteils aus der Legierung nach einem der Ansprüche 1 bis 3, umfassend :
    das Gießen einer Platte aus der Legierung mit der genannten Zusammensetzung,
    das Homogenisieren dieser Platte bei einer Temperatur von 500 bis 580°C,
    das Warmwalzen der Platte zu einem Band von 10 bis 3 mm Dicke mit nachfolgendem Kaltwalzen auf eine Dicke von 0,8 bis 1,5 mm,
    das Lösungsglühen des gewalzten Bandes bei einer Temperatur von 500 bis 560°C während 20 s bis 2 min mit nachfolgendem Abschrecken und Kaltauslagern für mehr als eine Woche bei Raumtemperatur,
    die Herstellung eines Werkstücks aus diesem Band und dessen Überzug mit einem Flüssiglack,
    das Einbrennen dieses Lacks bei einer Temperatur von 150 bis 170°C.
  5. Verfahren nach Anspruch 4, bei dem das Band nach dem Warmwalzen oder während des Kaltwalzens für 1 Std. bis 10 Std. bei 300 bis 500°C einer Glühung 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 true EP0896637B1 (de) 2000-05-24
EP0896637B2 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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784921A (en) * 1985-11-04 1988-11-15 Aluminum Company Of America Aluminum alloy automotive material
JPH04247842A (ja) * 1991-01-25 1992-09-03 Sky Alum Co Ltd 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
JPH06289852A (ja) * 1993-04-02 1994-10-18 Yamaha Corp ペダル鍵盤構造

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784921A (en) * 1985-11-04 1988-11-15 Aluminum Company Of America Aluminum alloy automotive material
JPH04247842A (ja) * 1991-01-25 1992-09-03 Sky Alum Co Ltd 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
JPH06289852A (ja) * 1993-04-02 1994-10-18 Yamaha Corp ペダル鍵盤構造

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GUPTA ET AL: 'THE PROPERTIES AND CHARACTERISTICS OF TWO NEW AUTOMOTIVE ALUMINIUM CLOSURE PANEL MATERIALS', SAE, CONGRES DU 26-29 FEVRIER 1996, DETROIT, MICHIGAN, USA. *

Also Published As

Publication number Publication date
DE69702133T2 (de) 2000-11-09
EP0896637A1 (de) 1999-02-17
FR2748035B1 (fr) 1998-07-03
EP0896637B2 (de) 2005-07-27
WO1997041272A1 (fr) 1997-11-06
ES2146467T3 (es) 2000-08-01
DE69702133D1 (de) 2000-06-29
FR2748035A1 (fr) 1997-10-31
ES2146467T5 (es) 2006-03-01
DE69702133T3 (de) 2006-04-20

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