EP0811700B1 - Deep drawable and weldable AlMgSi type aluminium alloy - Google Patents

Deep drawable and weldable AlMgSi type aluminium alloy Download PDF

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EP0811700B1
EP0811700B1 EP97810320A EP97810320A EP0811700B1 EP 0811700 B1 EP0811700 B1 EP 0811700B1 EP 97810320 A EP97810320 A EP 97810320A EP 97810320 A EP97810320 A EP 97810320A EP 0811700 B1 EP0811700 B1 EP 0811700B1
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alloy
max
weight
annealing
weldable
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EP0811700A1 (en
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Jürgen Timm
Peter Furrer
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3A Composites International AG
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Alcan Technology and Management Ltd
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    • 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
    • C22F1/047—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 magnesium 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
    • C22C21/06—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
    • 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
    • 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
    • C22F1/05—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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions

Definitions

  • the invention relates to a deep-drawn and weldable AlMgSi type aluminum alloy in the form of strips or sheets for the production of inner skin parts of a body, especially an automobile body.
  • As part of the invention is also a method for producing the Alloy and an inner skin part produced by deep drawing.
  • AlMgSi alloy is known from JP-A-05 112840, which are used to manufacture automotive body panels by press forming and that under paint baking conditions can be cured.
  • the alloy also contains Aluminum 0.4 to 1.5% Mg, 0.24 to 1.5% Si, 0.12 to 1.5% Cu, 0.005 to 0.15% Ti and max. 0.25% Fe.
  • the alloy is also intended to create the possibility the overall component consisting of outer and inner skin parts of body parts in the interior material recycle (production scrap and end-of-life vehicles), taking minor contaminants from other automotive materials aluminum-based, steel, copper wires, etc. should be.
  • the contents (% by weight) of the alloy elements Mg and Si through the corner points A * B * C * D * with the coordinates Si mg A * 0.80 0.40 B * 0.80 0.55 C * 0.95 0.55 D * 0.95 0.40 are limited and the alloy in addition Cu 0.15-0.45 Mn 0.05-0.20 Fe 0.05 to 0.55 Zn 0.05-0.50 optionally still 0.05-0.20 as well as further alloy elements individually max. 0.10, total max. 0.30 and aluminum as the rest.
  • the copper content of the alloy according to the invention is preferably between 0.2 and 0.4% by weight.
  • zinc By adding 0.05 to 0.4% by weight, in particular 0.1 up to 0.3% by weight zinc can further increase the strength combined with a slight improvement in formability can be achieved.
  • a vanadium content of 0.05 to 0.2% by weight leads to a further improvement in the forming behavior.
  • the average grain size in the sheet should not exceed 80 ⁇ m and is preferably less than 60 microns.
  • the alloy according to the invention is carried out in the usual way Continuous or strip casting, hot and cold rolling into one Sheet or strip processed.
  • Continuous or strip casting hot and cold rolling into one Sheet or strip processed.
  • the solution annealing in one Continuous belt furnace in a temperature range of 520 ° C up to 580 ° C or up to the solidus temperature of the alloy is carried out.
  • Optimal mechanical strength values and properties can be achieved if the alloy is preferably at the latest 60 min after the solution annealing of a so-called stabilization annealing of a maximum of 24h in a temperature range from 50 ° C to 150 ° C.
  • the alloy can be rolled to final thickness, solution annealed and then a temperature range of 160 ° C to 220 ° C can be thermoset. It is advantageous also a maximum of 25% deformation after solution annealing and before final annealing in the temperature range mentioned.
  • the alloy according to the invention is particularly suitable for the production of deep-drawn inner skin parts of a body, especially an automobile body.
  • Ac-120 is the preferred material for outer skin parts.
  • the contents (% by weight) of the alloy elements Mg and Si through the corner points A'B'C'D 'with the coordinates Si mg A ' 0.50 0.35 B ' 0.50 0.50 C ' 0.75 0.50 D ' 0.75 0.35 limited, a preferred area by the corner points A "B” C “D” with the coordinates Si mg A " 0.55 0.35 B “ 0.55 0.45 C " 0.7 0.45 D " 0.7 0.35 is limited.
  • a B C (not according to the invention) Si 0.85 0.94 0.69 mg 0.40 0.40 0.37 Cu 0.40 0.25 0.38 Mn 0.08 0.08 0.06 Fe 0.25 0.25 0.23 with aluminum as the remainder and a standard body sheet alloy AA6016 (Ac-120) used as a comparison alloy for outer skin applications were processed in the usual way by continuous casting, hot and cold rolling to a sheet with a thickness of 1.3 mm.
  • the mechanical strength values and properties of the alloy according to the invention and the comparison alloy determined on sheet metal samples are compared below.

Abstract

A deep drawing weldable Al alloy of the AlMgSi type comprises: (i) the alloy elements Mg and Si limited by the trapezium ABCDE with coordinates A(Si:0.50; Mg:0.35), B(Si:0.50; Mg:0.60), C(Si:0.95; Mg:0.60), D(Si:0.95; Mg:0.40) and E (Si:0.80; Mg:0.35) and the alloy further contains additions of Cu 0.15-0.45; Mn 0.05-0.20; Fe 0.25-0.55 and Zn 0.15-0.50. Also claimed is the production of the alloy by continuous casting, hot or cold rolling and solution treatment at 520-580 degrees C up to the solidus temp. of the alloy.

Description

Die Erfindung betrifft eine tiefziehbare und schweissbare Aluminiumlegierung vom Typ AlMgSi in der Form von Bändern oder Blechen zur Herstellung von Innenhautteilen einer Karosserie, insbesondere einer Automobilkarossene. Im Rahmen der Erfindung liegt auch ein Verfahren zur Herstellung der Legierung sowie ein durch Tiefziehen hergestelltes Innenhautteil.The invention relates to a deep-drawn and weldable AlMgSi type aluminum alloy in the form of strips or sheets for the production of inner skin parts of a body, especially an automobile body. As part of the invention is also a method for producing the Alloy and an inner skin part produced by deep drawing.

In der Praxis bekannte Legierungen, die zur Herstellung von Karosserieblechen für die Automobilindustrie eingesetzt werden, sind in DE-A-27 14 395, US-A-4 082 578 und EP-B-0 259 232 beschrieben. Jede dieser Legierungen hat ihre Vorzüge, indem gewisse mechanische Eigenschaften wie beispielsweise die Festigkeit optimiert sind, allerdings zumeist unter Inkaufnahme einer Verschlechterung anderer Eigenschaften wie beispielsweise des Umformvermögens.Alloys known in practice for the production of Body panels used for the automotive industry are in DE-A-27 14 395, US-A-4 082 578 and EP-B-0 259 232. Each of these alloys has its advantages by certain mechanical properties such as the strength is optimized, but usually with a trade-off deterioration of other properties such as for example the formability.

Aus der JP-A-05 112840 ist eine AlMgSi-Legierung bekannt, die sich zur Herstellung von Automobilkarosserieblechen durch Pressumformen eignet und die unter Lackeinbrennbedingungen ausgehärtet werden kann. Die Legierung enthält neben Aluminium 0,4 bis 1,5% Mg, 0,24 bis 1,5% Si, 0,12 bis 1,5% Cu, 0,005 bis 0,15% Ti sowie max. 0,25% Fe.An AlMgSi alloy is known from JP-A-05 112840, which are used to manufacture automotive body panels by press forming and that under paint baking conditions can be cured. The alloy also contains Aluminum 0.4 to 1.5% Mg, 0.24 to 1.5% Si, 0.12 to 1.5% Cu, 0.005 to 0.15% Ti and max. 0.25% Fe.

In Europa hat sich als Werkstoff für Aussenhautteile von Karosserien die unter dem Namen Anticorodal-120 (Ac-120) bekanntgewordene Legierung AA6016 bzw. AA6116 durchgesetzt. Als Werkstoff für die Innenhaut wird neben den Legierungen AA6009 oder AA5754 auch die Legierung AA5182 eingesetzt.In Europe it has become a material for the outer skin parts of car bodies the one known as Anticorodal-120 (Ac-120) Alloy AA6016 or AA6116 prevailed. In addition to the alloys, the material for the inner skin is AA6009 or AA5754 also used the alloy AA5182.

Vor dem Hintergrund dieses Standes der Technik liegt der Erfindung die Aufgabe zugrunde, eine zur Herstellung von Innenhautteilen einer Karosserie geeignete Legierung des Typs AlMgSi mit folgenden Eigenschaften zu schaffen:

  • Aushärtbarkeit wie Ac-120
  • Problemlos punktschweissbar bzw. laserschweissbar mit Ac-120
  • Festigkeit gleich oder besser als Ac-120
  • Umformbarkeit (Streck- und Tiefziehen) gleich oder besser als Ac-120
  • Korrosionsbeständigkeit vergleichbar mit Ac-120.
Against the background of this prior art, the object of the invention is to create an alloy of the type AlMgSi suitable for the production of inner skin parts of a body with the following properties:
  • Curability like Ac-120
  • Spot-weldable or laser-weldable with Ac-120
  • Strength equal to or better than Ac-120
  • Formability (stretching and deep drawing) equal to or better than Ac-120
  • Corrosion resistance comparable to Ac-120.

Zudem soll mit der Legierung die Möglichkeit geschaffen werden, die aus Aussen- und Innenhautteilen bestehende Gesamtkomponente von Karosserieteilen in den Innenwerkstoff zu rezyklieren (Produktionsschrott und end-of-life vehicles), wobei auch kleinere Verunreinigungen anderer Automobilwerkstoffe auf Aluminiumbasis, aus Stahl, Kupferdrähte etc auffangbar sein sollen.The alloy is also intended to create the possibility the overall component consisting of outer and inner skin parts of body parts in the interior material recycle (production scrap and end-of-life vehicles), taking minor contaminants from other automotive materials aluminum-based, steel, copper wires, etc. should be.

Zur erfindungsgemässen Lösung der Aufgabe führt, dass die Gehalte (Gew.%) der Legierungselemente Mg und Si durch die Eckpunkte A*B*C*D* mit den Koordinaten Si Mg A* 0,80 0,40 B* 0,80 0,55 C* 0,95 0,55 D* 0,95 0,40 begrenzt sind und die Legierung zusätzlich Cu 0,15-0,45 Mn 0,05-0,20 Fe 0,05-0,55 Zn 0,05-0,50 wahlweise noch 0,05 - 0,20 sowie weitere Legierungselemente einzeln max. 0,10, insgesamt max. 0,30 und Aluminium als Rest enthält.To achieve the object according to the invention, the contents (% by weight) of the alloy elements Mg and Si through the corner points A * B * C * D * with the coordinates Si mg A * 0.80 0.40 B * 0.80 0.55 C * 0.95 0.55 D * 0.95 0.40 are limited and the alloy in addition Cu 0.15-0.45 Mn 0.05-0.20 Fe 0.05 to 0.55 Zn 0.05-0.50 optionally still 0.05-0.20 as well as further alloy elements individually max. 0.10, total max. 0.30 and aluminum as the rest.

Alle für die Legierungselemente verwendeten Gehaltsangaben beziehen sich auf Gewichtsprozente.All content information used for the alloying elements refer to percentages by weight.

Spezielle und weiterbildende Ausführungsarten der erfindungsgemässen Legierung sind Gegenstand von abhängigen Patentansprüchen.Special and further developing embodiments of the inventive Alloys are the subject of dependent claims.

Der Kupfergehalt der erfindungsgemässen Legierung liegt bevorzugt zwischen 0,2 und 0,4 Gew.%.The copper content of the alloy according to the invention is preferably between 0.2 and 0.4% by weight.

Durch einen Zusatz von 0,05 bis 0,4 Gew.%, insbesondere 0,1 bis 0,3 Gew.% Zink kann eine weitere Festigkeitssteigerung verbunden mit einer leichten Verbesserung des Umformvermögens erreicht werden.By adding 0.05 to 0.4% by weight, in particular 0.1 up to 0.3% by weight zinc can further increase the strength combined with a slight improvement in formability can be achieved.

Ein Gehalt an Vanadium von 0,05 bis 0,2 Gew.% führt zu einer weiteren Verbesserung des Umformverhaltens.A vanadium content of 0.05 to 0.2% by weight leads to a further improvement in the forming behavior.

Die mittlere Korngrösse im Blech sollte 80 µm nicht übersteigen und liegt bevorzugt unter 60 µm.The average grain size in the sheet should not exceed 80 µm and is preferably less than 60 microns.

Die erfindungsgemässe Legierung wird auf übliche Weise durch Strang- oder Bandgiessen, Warm- und Kaltwalzen zu einem Blech oder Band verarbeitet. Zur Erzielung der vorstehend beschriebenen optimalen Eigenschaften der Legierung bezüglich Festigkeit und Umformverhalten hat sich als besonders vorteilhaft herausgestellt, wenn die Lösungsglühung in einem Banddurchlaufofen in einem Temperaturbereich von 520°C bis 580°C bzw. bis zur Solidustemperatur der Legierung durchgeführt wird.The alloy according to the invention is carried out in the usual way Continuous or strip casting, hot and cold rolling into one Sheet or strip processed. To achieve the above described optimal properties of the alloy with respect Strength and forming behavior has proven to be special it is found to be advantageous if the solution annealing in one Continuous belt furnace in a temperature range of 520 ° C up to 580 ° C or up to the solidus temperature of the alloy is carried out.

Optimale mechanische Festigkeitswerte und Eigenschaften lassen sich erzielen, wenn die Legierung vorzugsweise spätestens 60 min nach der Lösungsglühung einer sogenannten Stabilisierungsglühung von maximal 24h in einem Temperaturbereich von 50°C bis 150°C unterzogen wird.Optimal mechanical strength values and properties can be achieved if the alloy is preferably at the latest 60 min after the solution annealing of a so-called stabilization annealing of a maximum of 24h in a temperature range from 50 ° C to 150 ° C.

Die Legierung kann bei Bedarf auf Enddicke abgewalzt, lösungsgeglüht und anschliessend einem Temperaturbereich von 160°C bis 220 °C warmausgehärtet werden. Vorteilhaft ist auch eine Umformung um maximal 25% nach der Lösungsglühung und vor der Endglühung im erwähnten Temperaturbereich.If necessary, the alloy can be rolled to final thickness, solution annealed and then a temperature range of 160 ° C to 220 ° C can be thermoset. It is advantageous also a maximum of 25% deformation after solution annealing and before final annealing in the temperature range mentioned.

Wenn mit der Legierung lackierte Karosserieteile hergestellt werden, kann es vorteilhaft sein, die Endglühung mit der Lackeinbrennung zu kombinieren.When body parts are painted with the alloy , it can be advantageous to use the final annealing to combine the paint baking.

Die erfindungsgemässe Legierung ist insbesondere geeignet zur Herstellung tiefgezogener Innenhautteile einer Karosserie, insbesondere einer Automobilkarosserie.The alloy according to the invention is particularly suitable for the production of deep-drawn inner skin parts of a body, especially an automobile body.

Als Werkstoff für Aussenhautteile wird heute bevorzugt Ac-120 eingesetzt. Bei einer ebenfalls für Aussenhautteile geeigneten Legierungszusammensetzung sind die Gehalte (Gew.%) der Legierungselemente Mg und Si durch die Eckpunkte A'B'C'D' mit den Koordinaten Si Mg A' 0,50 0,35 B' 0,50 0,50 C' 0,75 0,50 D' 0,75 0,35 begrenzt, wobei ein bevorzugter Bereich durch die Eckpunkte A"B"C"D" mit den Koordinaten Si Mg A" 0,55 0,35 B" 0,55 0,45 C" 0,7 0,45 D" 0,7 0,35 begrenzt ist.Ac-120 is the preferred material for outer skin parts. In the case of an alloy composition which is also suitable for outer skin parts, the contents (% by weight) of the alloy elements Mg and Si through the corner points A'B'C'D 'with the coordinates Si mg A ' 0.50 0.35 B ' 0.50 0.50 C ' 0.75 0.50 D ' 0.75 0.35 limited, a preferred area by the corner points A "B" C "D" with the coordinates Si mg A " 0.55 0.35 B " 0.55 0.45 C " 0.7 0.45 D " 0.7 0.35 is limited.

Beide der vorstehend erwähnten Aussenhautwerkstoffe lassen sich problemlos mit dem erfindungsgemässen Innenhautwerkstoff als Gesamtkomponente eines Karosserieteils in den Innenwerkstoff rezyklieren.Leave both of the above-mentioned outer skin materials easily with the inner skin material according to the invention as a total component of a body part in the inner material recycle.

Weitere Vorteile, Merkmale und Einzelheiten der erfindungsgemässen Legierung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigt in ihrer einzigen Figur ein Diagramm mit den Gehaltsgrenzen der Legierungselemente Mg und Si für die erfindungsgemässe Legierung und für weitere als Aussenhautwerkstoffe eingesetzte bzw. geeignete Legierungen.Further advantages, features and details of the inventive Alloy result from the description below preferred embodiments and based on the drawing; this shows a diagram in its single figure with the content limits of the alloying elements Mg and Si for the alloy according to the invention and for more than Outer skin materials used or suitable alloys.

Legierungen der ZusammensetzungAlloys of the composition

A B C (nicht erfindungsgemäss) Si 0,85 0,94 0,69 Mg 0,40 0,40 0,37 Cu 0,40 0,25 0,38 Mn 0,08 0,08 0,06 Fe 0,25 0,25 0,23 mit Aluminium als Rest und eine für Aussenhautanwendungen eingesetzte Standardkarosserieblechlegierung AA6016 (Ac-120) als Vergleichslegierung wurden auf übliche Weise durch Stranggiessen, Warm- und Kaltwalzen zu einem Blech mit einer Dicke von 1,3 mm verarbeitet. Die an Blechproben ermittelten mechanischen Festigkeitswerte und Eigenschaften der erfindungegemässen Legierung und der Vergleichslegierung sind nachfolgend einander gegenübergestellt. Rm
(MPa) Rp0,2
(MPa) Rp0,2/Rm A10
(%) n5% r A 235 125 0,54 22,5 0,28 0,68 B 242 134 0,55 25,8 0,27 0,68 C 212 106 0,50 26,5 0,30 0,65 Ac-120 222 114 0,51 28,0 0,27 0,55 A B C (not according to the invention) Si 0.85 0.94 0.69 mg 0.40 0.40 0.37 Cu 0.40 0.25 0.38 Mn 0.08 0.08 0.06 Fe 0.25 0.25 0.23 with aluminum as the remainder and a standard body sheet alloy AA6016 (Ac-120) used as a comparison alloy for outer skin applications were processed in the usual way by continuous casting, hot and cold rolling to a sheet with a thickness of 1.3 mm. The mechanical strength values and properties of the alloy according to the invention and the comparison alloy determined on sheet metal samples are compared below. R m
(MPa) R p0.2
(MPa) R p0.2 / R m A 10
(%) n 5% r A 235 125 0.54 22.5 0.28 0.68 B 242 134 0.55 25.8 0.27 0.68 C 212 106 0.50 26.5 0.30 0.65 Ac-120 222 114 0.51 28.0 0.27 0.55

Die Bleche wurden in praxisnahen Versuchen tiefgezogen und weiteren, bei der Herstellung von Karosserieteilen üblichen Umformoperationen unterzogen. Ebenfalls wurden Versuche zur Verschweissbarkeit der erfindungsgemässen Legierung mit Ac-120 durchgeführt. Die Praxistests haben die aufgrund obiger Messwerte zu erwartenden Verbesserungen der erfindungsgemässen Legierung gegenüber Legierungen nach dem Stand der Technik bestätigt.The sheets were deep-drawn in practical tests and other, usual in the manufacture of body parts Undergone forming operations. Attempts have also been made to Weldability of the alloy according to the invention with Ac-120 carried out. The practical tests are based on the above Measured values expected improvements of the inventive Alloy compared to the state of the art Technology confirmed.

Ein Vergleich der beiden erfindungsgemässen Legierungszusammensetzungen A und B mit der Standardkarosserielegierung Ac-120 lässt sich wie folgt zusammenfassen:

  • Die Aushärtbarkeit der Legierungen A und B ist vergleichbar mit derjenigen von Ac-120. Ein geringer Si-Ueberschuss von Ac-120 wird kompensiert durch den Cu-Gehalt der Legierungen A und B.
  • Der verhältnismässig geringe Kupfergehalt der Legierungen A und B erlaubt ein problemloses Verschweissen mit Ac-120.
  • Die Festigkeit der Legierung A und B ist infolge des erhöhten Mg- bzw. Cu-Gehaltes gegenüber Ac-120 erhöht.
  • Bezüglich der Umformoperationen Streckziehen und Tiefziehen zeigen die Legierungen A und B ein gegenüber Ac-120 gleiches oder sogar besseres Verhalten.
  • Die Korrosionsbeständigkeit der Legierungen A und B ist mit derjenigen von Ac-120 vergleichbar. Ein erhöhter Cu-Gehalt der erfindungsgemässen Legierung wird kompensiert durch einen geringeren Si-Ueberschuss.
A comparison of the two alloy compositions A and B according to the invention with the standard body alloy Ac-120 can be summarized as follows:
  • The hardenability of alloys A and B is comparable to that of Ac-120. A slight Si excess of Ac-120 is compensated for by the Cu content of alloys A and B.
  • The relatively low copper content of alloys A and B enables problem-free welding with Ac-120.
  • The strength of alloys A and B is increased compared to Ac-120 due to the increased Mg or Cu content.
  • With regard to the forming operations of stretch drawing and deep drawing, alloys A and B show the same or even better behavior than Ac-120.
  • The corrosion resistance of alloys A and B is comparable to that of Ac-120. An increased Cu content of the alloy according to the invention is compensated for by a smaller excess of Si.

Die als Aussenhautwerkstoff häufig eingesetzte Standardkarosserielegierung Ac-120 lässt sich problemlos in den erfindungsgemässen Innenhautwerkstoff rezyklieren. Dieser Vorteil ergibt sich ohne weiteres aus den Gehaltsbereichen für die Hauptelemente der erfindungsgemässen Legierung:

Si
Ac-120 mit ca. 1,1% Si ist in grossem Umfang auffangbar, da alle anderen relevanten Aluminium-Knetwerkstoffe geringere Si-Gehalte aufweisen.
Mg
Der Mg-Gehalt ist gegenüber demjenigen von Ac-120 erhöht, d.h. es sind auch Zusätze von AlMg-Werkstoffen auffangbar.
Cu
Der geringe Cu-Gehalt von Ac-120 erlaubt problemlos das Auffangen kleinerer Cu-Verunreinigungen wie z.B. Kupferdrähte.
Fe
Der beschränkte Fe-Gehalt von Ac-120 ermöglicht auch problemlos das Auffangen kleinerer Verunreinigungen aus Stahl.
The standard body alloy Ac-120, which is frequently used as the outer skin material, can be easily recycled into the inner skin material according to the invention. This advantage results directly from the content ranges for the main elements of the alloy according to the invention:
Si
Ac-120 with approx. 1.1% Si can be collected to a large extent, since all other relevant aluminum kneading materials have lower Si contents.
mg
The Mg content is higher than that of Ac-120, ie additions of AlMg materials can also be collected.
Cu
The low Cu content of Ac-120 allows smaller Cu contaminants such as copper wires to be collected without any problems.
Fe
The limited Fe content of Ac-120 also allows small impurities from steel to be captured without any problems.

Claims (9)

  1. Deep-drawable, weldable AlMgSi-type aluminium alloy in the form of strips or sheets for the production of interior panelling parts of a body, in particular a car body, in which the contents (% by weight) of the alloying elements Mg and Si are delimited by the corner points A* B* C* D* with the coordinates Si Mg A* 0.80 0.40 B* 0.80 0.55 C* 0.95 0.55 D* 0.95 0.40
    and the alloy additionally contains Cu 0.15 - 0.45 Mn 0.05 - 0.20 Fe 0.25 - 0.55 Zn 0.05 - 0.50 and optionally also V 0.05 - 0.2
    and other alloying elements individually to a max. of 0.10 and in total to a max. of 0.30, with the balance aluminium.
  2. Alloy according to claim 1, characterised in that it contains 0.2 to 0.4 % by weight Cu.
  3. Alloy according to claim 1 or claim 2, characterised in that it contains 0.05 to 0.4 % by weight, in particular 0.1 to 0.3 % by weight Zn.
  4. Alloy according to one of claims 1 to 3, characterised in that the mean grain size is a max. of 80 µm, preferably a max. of 60 µm.
  5. Process for the production of an alloy according to one of claims 1 to 4 by continuous casting or strip casting and hot and cold rolling, in which solution annealing is carried out in a belt kiln over a temperature range of 520°C to 580°C or to the solidus temperature of the alloy.
  6. Process according to claim 5, characterised in that, after the solution annealing, preferably no more than 60 minutes after the solution annealing, the alloy is subjected to stabilisation annealing for a maximum of 24 hours over a temperature range of 50°C to 150°C.
  7. Process according to claim 5 or claim 6, characterised in that the alloy is worked to a max. of 25 % after the solution annealing and is then aged over a temperature range of 160°C to 220°C.
  8. Process according to claim 7, characterised in that the final annealing is carried out as paint baking.
  9. Interior panelling parts of a body, in particular a car body, produced by deep drawing from an alloy according to one of claims 1 to 4.
EP97810320A 1996-06-04 1997-05-26 Deep drawable and weldable AlMgSi type aluminium alloy Expired - Lifetime EP0811700B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH01401/96A CH690916A5 (en) 1996-06-04 1996-06-04 Thermaformed and weldable aluminum alloy of the AlMgSi type.
CH140196 1996-06-04
CH1401/96 1996-06-04

Publications (2)

Publication Number Publication Date
EP0811700A1 EP0811700A1 (en) 1997-12-10
EP0811700B1 true EP0811700B1 (en) 2002-06-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97810320A Expired - Lifetime EP0811700B1 (en) 1996-06-04 1997-05-26 Deep drawable and weldable AlMgSi type aluminium alloy

Country Status (5)

Country Link
EP (1) EP0811700B1 (en)
AT (1) ATE219158T1 (en)
CH (1) CH690916A5 (en)
DE (1) DE59707470D1 (en)
ES (1) ES2177920T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6355090B1 (en) * 1998-04-08 2002-03-12 The Furukawa Electric Co., Ltd. Method of manufacturing aluminum alloy for flattening material and aluminum alloy flattening material for automobiles
CH693673A5 (en) * 1999-03-03 2003-12-15 Alcan Tech & Man Ag Use of an aluminum alloy of the AlMgSi type for the production of structural components.
FR2835533B1 (en) * 2002-02-05 2004-10-08 Pechiney Rhenalu AL-Si-Mg ALLOY SHEET FOR AUTOMOTIVE BODY SKIN
US20050000609A1 (en) * 2002-12-23 2005-01-06 Butler John F. Crash resistant aluminum alloy sheet products and method of making same
EP1533394A1 (en) 2003-11-20 2005-05-25 Alcan Technology & Management Ltd. Car body component
EP2156945A1 (en) 2008-08-13 2010-02-24 Novelis Inc. Clad automotive sheet product
CN104532080A (en) * 2014-12-31 2015-04-22 东莞市东兴铝业有限公司 Aluminum alloy materials for car exhaust pipe and preparation method thereof

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Publication number Priority date Publication date Assignee Title
US3135633A (en) * 1959-09-08 1964-06-02 Duralumin Heat treatment process improving the mechanical properties of aluminiummagnesium-silicon alloys
US4082578A (en) * 1976-08-05 1978-04-04 Aluminum Company Of America Aluminum structural members for vehicles
CH624147A5 (en) * 1976-12-24 1981-07-15 Alusuisse
DE3243371A1 (en) * 1982-09-13 1984-03-15 Schweizerische Aluminium AG, 3965 Chippis ALUMINUM ALLOY
US4808247A (en) * 1986-02-21 1989-02-28 Sky Aluminium Co., Ltd. Production process for aluminum-alloy rolled sheet
FR2601040B1 (en) * 1986-07-07 1988-09-02 Cegedur SOLDERABLE AND WELDABLE ALUMINUM ALLOY AND MANUFACTURING METHOD THEREOF
JPH0674480B2 (en) * 1987-09-03 1994-09-21 本田技研工業株式会社 Forming and welding alloy sheet excellent in weldability, rust resistance, formability and bake hardenability, and method for producing the same
JPH05112840A (en) * 1991-10-18 1993-05-07 Nkk Corp Baking hardenability al-mg-si alloy sheet excellent in press formability and its manufacture
CH685707A5 (en) * 1991-12-16 1995-09-15 Alusuisse Lonza Services Ag Body panel.
JP2626958B2 (en) * 1993-03-16 1997-07-02 スカイアルミニウム株式会社 Method for producing aluminum alloy sheet excellent in formability and bake hardenability
CA2197547C (en) * 1994-09-06 2001-05-01 Michael Jackson Bull Heat treatment process for aluminum alloy sheet
CH688379A5 (en) * 1994-11-29 1997-08-29 Alusuisse Lonza Services Ag Thermaformed and weldable aluminum alloy of the AlMgSi type

Also Published As

Publication number Publication date
ATE219158T1 (en) 2002-06-15
DE59707470D1 (en) 2002-07-18
ES2177920T3 (en) 2002-12-16
EP0811700A1 (en) 1997-12-10
CH690916A5 (en) 2001-02-28

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