EP1165848A1 - STRUCTURAL COMPONENT MADE OF AN ALUMINUM ALLOY OF THE AlMgSi TYPE - Google Patents

STRUCTURAL COMPONENT MADE OF AN ALUMINUM ALLOY OF THE AlMgSi TYPE

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Publication number
EP1165848A1
EP1165848A1 EP00903476A EP00903476A EP1165848A1 EP 1165848 A1 EP1165848 A1 EP 1165848A1 EP 00903476 A EP00903476 A EP 00903476A EP 00903476 A EP00903476 A EP 00903476A EP 1165848 A1 EP1165848 A1 EP 1165848A1
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EP
European Patent Office
Prior art keywords
structural component
alloy
component according
max
sheet
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Granted
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EP00903476A
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German (de)
French (fr)
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EP1165848B1 (en
Inventor
Jürgen Timm
Corrado Bassi
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3A Composites International AG
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Alcan Technology and Management Ltd
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Publication of EP1165848A1 publication Critical patent/EP1165848A1/en
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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
    • C22F1/05—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
    • 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

  • Structural component made of an aluminum alloy of the type AlMgSi
  • the invention relates to a structural component made of an aluminum alloy of the AlMgSi type, with a high absorption capacity for kinetic energy through plastic deformation.
  • the invention also encompasses a body part made of aluminum alloy, with high flexibility without crack and orange peel formation, in particular in the form of a two-sheet structure such as the bonnet, door and trunk lid of a passenger car.
  • Crash behavior is an increasingly important aspect in vehicle construction; this applies to road traffic as well as to rail traffic.
  • Manufacturers of road and rail vehicles are increasingly turning to dimensioning special components or even entire assemblies of the vehicle so that they absorb as much energy as possible in a collision, thereby reducing the risk of injury to passengers.
  • the mechanical properties of the materials and joining zones used are of crucial importance.
  • the aim is to absorb as much energy as possible before breaking. This can be achieved by a low ratio of yield strength to strength.
  • An important material characteristic is also a high elongation.
  • the requirements for the finished component must also be observed. In terms of construction, for example, a certain strength level, certain minimum values of the elongation, corrosion resistance or other essential characteristic values can be specified.
  • EP-A-0805219 discloses a structural component made of an AlMgSi alloy for use in vehicle construction.
  • the structural component is manufactured in a conventional manner by extrusion.
  • the invention is based on the object of creating a structural component of the type mentioned at the outset which fulfills the requirements with regard to crash behavior achieved with extruded structural components.
  • the alloy used for structural components should also be able to be used to manufacture body parts.
  • the structural component according to the invention preferably has a part formed from sheet metal and connected to form a tubular part or hollow body.
  • the tubular part is preferably rectangular in cross section, but can in principle have any cross-sectional shape.
  • the tubular part can be further shaped by internal high pressure forming.
  • the plate can be connected to a tubular part by any type of connection, for example by welding, gluing, riveting or screwing.
  • the alloy used for the structural component can also be used for the production of body parts, in particular in the form of a two-sheet structure such as the bonnet, door and trunk lid of a motor vehicle, which considerably simplifies the scrap recycling or recyclability of structural components and body panels.
  • the structural component according to the invention is particularly suitable as a safety component in vehicle construction, in particular in the automotive sector.
  • the alloy according to the invention can be processed in a customary manner by continuous casting or strip casting, hot and / or cold rolling into sheet metal or strip.
  • solution annealing is carried out in a continuous belt furnace in a temperature range from 520 ° C. to 580 ° C. with subsequent quenching. Quenching can be carried out in the usual way, usually with water or with air, depending on the sheet thickness.
  • solution annealing care must be taken to ensure that all soluble components such as Si and Mg 2 Si pass into solid solutions and are in the supersaturated state after cooling.
  • the cooling rate can have a significant effect on the mechanical properties, because if the cooling rate is too slow, Si and Mg 2 Si separate out at the grain boundaries and thus significantly deteriorate the crash and bending behavior. In addition, the hardenability and the corrosion behavior are impaired.
  • the structural components and body parts according to the invention are preferably used in the heat-cured state, in particular in the heat treatment state T6.
  • This state of heat treatment can be generated in body parts during a paint baking cycle.
  • the strips or sheets used to produce the structural components according to the invention and the body parts are preferably in a thickness range from 0.8 to 4 mm.
  • the strips and sheets can additionally be chemically or electrochemically pretreated and / or provided with a dry lubricant coating prior to finishing.
  • the crash behavior was assessed in a quasi-static compression test with grades from 1 to 3, 3 being the top grade.
  • the quasi-static compression test is used to assess energy-absorbing components.
  • the desired behavior is characterized by regular folding without cracking.
  • the appearance of the compressed samples was rated 3 (no cracking, even folding), 2 (roughened, slightly torn), and 1 (cracking).

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Body Structure For Vehicles (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Laminated Bodies (AREA)
  • Braking Arrangements (AREA)
  • Superstructure Of Vehicle (AREA)
  • Resistance Welding (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)

Abstract

An alloy of the AlMgSi type which is suited for producing structural components which are highly capable of absorbing kinetic energy by means of plastic deformation contains silicon provided in a wt. % ranging from 0.45 to 0.85, magnesium in a wt. % ranging from 0.35 to 1.0, copper in a wt. % ranging from 0.05 to 0.30, iron in a wt. % ranging from 0.05 to 0.25, vanadium in a maximum wt. % of 0.25, manganese in a maximum wt. % of 0.10, as well as impurities which result during production in a maximum wt. % of 0.05 individually and 0.15 in total, and aluminum as the remainder wt. %. The structural component is manufactured from a rolled strip or sheet of the alloy. Components made of this alloy are suited as safety parts used in the construction of vehicles. The alloy is also suited for producing vehicle body parts which comprise a high degree of flexibility without the occurrence of cracking and orange peel effects, in particular, for producing two-sheet structures such as an engine hood, door, and trunk lid of a passenger car. These structural components and vehicle body parts can be easily recycled together.

Description

Strukturbauteil aus einer Aluminiumlegierung vom Typ AlMgSiStructural component made of an aluminum alloy of the type AlMgSi
Die Erfindung betrifft ein Strukturbauteil aus einer Aluminiumlegierung vom Typ AlMgSi, mit hohem Aufnahmevermögen für kinetische Energie durch plastische Verformung. Die Erfindung umfasst auch ein Karosserieteil aus der Aluminiumlegierung, mit hoher Biegefähigkeit ohne Riss- und Orangenhautausbildung, insbesondere in Form einer Zweiblechstruktur wie Motorhaube, Tür und Koffer- raumdeckel eines Personenkraftwagens.The invention relates to a structural component made of an aluminum alloy of the AlMgSi type, with a high absorption capacity for kinetic energy through plastic deformation. The invention also encompasses a body part made of aluminum alloy, with high flexibility without crack and orange peel formation, in particular in the form of a two-sheet structure such as the bonnet, door and trunk lid of a passenger car.
Das Crash-Verhalten ist im Fahrzeugbau ein zunehmend wichtiger Aspekt; dies gilt für den Strassenverkehr ebenso wie für den Schienenverkehr. Hersteller von Strassen- und Schienenfahrzeugen gehen immer mehr dazu über, spezielle Bauelemente oder sogar ganze Baugruppen des Fahrzeugs so zu dimensionieren, dass diese bei einem Zusammenstoss möglichst viel Energie absor- bieren, um damit das Verletzungsrisiko der Passagiere zu verringern. Neben der konstruktiven Gestaltung dieser sogenannten Crash-Elemente sind die mechanischen Eigenschaften der eingesetzten Werkstoffe und Fügezonen von ausschlaggebender Bedeutung. Angestrebt wird eine möglichst grosse Absorption von Energie vor dem Bruch. Dies kann durch ein niedriges Verhältnis von Streckgrenze zu Festigkeit erreicht werden. Ein wichtiges Werkstoffmerkmal ist auch eine hohe Dehnung. Zu beachten sind auch die Anforderungen an das fertige Bauteil. Von der Konstruktion her können beispielsweise ein bestimmtes Festigkeitsniveau, bestimmte Mindestwerte der Dehnung, Korrosionsbeständigkeit oder andere wesentliche Kennwerte vorgegeben sein.Crash behavior is an increasingly important aspect in vehicle construction; this applies to road traffic as well as to rail traffic. Manufacturers of road and rail vehicles are increasingly turning to dimensioning special components or even entire assemblies of the vehicle so that they absorb as much energy as possible in a collision, thereby reducing the risk of injury to passengers. In addition to the structural design of these so-called crash elements, the mechanical properties of the materials and joining zones used are of crucial importance. The aim is to absorb as much energy as possible before breaking. This can be achieved by a low ratio of yield strength to strength. An important material characteristic is also a high elongation. The requirements for the finished component must also be observed. In terms of construction, for example, a certain strength level, certain minimum values of the elongation, corrosion resistance or other essential characteristic values can be specified.
Die wachsende Bedeutung der Herstellung leichterer Automobile zur Energieeinsparung hat zur Entwicklung einer grossen Anzahl von Aluminiumlegierungen für Automobilanwendungen geführt. Ideal wäre eine einzige Aluminiumlegierung, die für verschiedene Teile im Automobilbau eingesetzt werden könnte. Besonders im Hinblick auf die Schrottverwertung oder die Rezyklierbarkeit von sogenannten Space frame Strukturen im Automobilbau wäre es wünschens- wert, die heute aus stranggepressten Profilen hergestellten Rahmenteile, die Karosseriebleche als auch die Strukturkomponenten aus ein und derselben Legierung fertigen zu können. Unterschiedliche Komponenten in einem Automobil erfordern jedoch häufig unterschiedliche Eigenschaften. Beispielsweise sollte eine Aluminiumlegierung für Aussenblechanwendungen sehr gut umformbar sein, um Streckziehen, Tiefziehen und Biegen zu ermöglichen , gleichzeitig aber eine hohe Festigkeit nach dem Lackeinbrennen erreichen. Insbesondere Bleche zur Herstellung von Zweiblechstrukturen wie Motorhauben, Türen und Kofferraumdeckel sollten eine hohe Biegefähigkeit ohne Riss- und Orangenhautausbildung aufweisen, da diese Komponenten oft durch Bördeln verbunden werden.The growing importance of manufacturing lighter automobiles to save energy has led to the development of a large number of aluminum alloys for automotive applications. The ideal would be a single aluminum alloy that could be used for different parts in the automotive industry. With regard to the recycling of scrap or the recyclability of so-called space frame structures in automotive engineering, it would be desirable It is worth being able to manufacture the frame parts, the body panels and the structural components from one and the same alloy, which are now made from extruded profiles. However, different components in an automobile often require different properties. For example, an aluminum alloy for exterior sheet metal applications should be very easy to form in order to enable stretch drawing, deep drawing and bending, but at the same time achieve high strength after baking the paint. In particular, sheets for the production of two-sheet structures such as bonnets, doors and trunk lids should have a high degree of flexibility without cracking and orange peeling, since these components are often connected by flanging.
Die EP-A-0805219 offenbart ein Strukturbauteil aus einer AlMgSi-Legierung für den Einsatz im Fahrzeugbau. Das Strukturbauteil wird auf herkömmliche Weise durch Strangpressen gefertigt.EP-A-0805219 discloses a structural component made of an AlMgSi alloy for use in vehicle construction. The structural component is manufactured in a conventional manner by extrusion.
Der Erfindung liegt die Aufgabe zugrunde, ein Strukturbauteil der eingangs genannten Art zu schaffen, welches die mit stranggepressten Strukturbauteilen erreichten Anforderungen bezüglich des Crashverhaltens erfüllt. Zudem soll die für Strukturbauteile verwendete Legierung auch zur Herstellung von Karosserieteilen eingesetzt werden können.The invention is based on the object of creating a structural component of the type mentioned at the outset which fulfills the requirements with regard to crash behavior achieved with extruded structural components. In addition, the alloy used for structural components should also be able to be used to manufacture body parts.
Zur erfindungsgemässen Lösung der Aufgabe führt, dass die Legierung (in Gew.%) Silizium 0.45 bis 0.85In order to achieve the object according to the invention, the alloy (in% by weight) silicon 0.45 to 0.85
Magnesium 0.35 bis 1.0Magnesium 0.35 to 1.0
Kupfer 0.05 bis 0.30Copper 0.05 to 0.30
Eisen 0.05 bis 0.25Iron 0.05 to 0.25
Vanadium max. 0.25 Mangan max. 0.10 sowie herstellungsbedingte Verunreinigungen max. 0.05, insgesamt max. 0J5 und Aluminium als Rest enthält, und das Strukturbauteil aus gewalztem Band oder Blech der Legierung gefertigt ist.Vanadium max. 0.25 manganese max. 0.10 and manufacturing-related impurities max. 0.05, total max. 0J5 and aluminum as the rest contains, and the structural component is made of rolled strip or sheet of the alloy.
Für die genannten Legierungselemente gelten die folgenden Vorzugsbereiche:The following preferred ranges apply to the alloy elements mentioned:
Silizium 0.50 bis 0.80Silicon 0.50 to 0.80
Magnesium 0.40 bis 0.65Magnesium 0.40 to 0.65
Kupfer 0.05 bis 0.20Copper 0.05 to 0.20
Eisen 0.05 bis 0.20Iron 0.05 to 0.20
Vanadium max. 0.20.Vanadium max. 0.20.
Das erfindungsgemässe Strukturbauteil weist bevorzugt ein aus Blech geformtes und zu einen rohrförmigen Teil oder Hohlkörper verbundenes Teil auf. Der rohrförmige Teil ist bevorzugt querschnittlich rechteckig, kann jedoch grundsätzlich eine beliebige Querschnittsform aufweisen. Für komplexere Bauteilgeometrien kann der rohrförmige Teil durch Innenhochdruckumformen weiter umgeformt werden.The structural component according to the invention preferably has a part formed from sheet metal and connected to form a tubular part or hollow body. The tubular part is preferably rectangular in cross section, but can in principle have any cross-sectional shape. For more complex component geometries, the tubular part can be further shaped by internal high pressure forming.
Die Verbindung des Blechs zu einem rohrförmigen Teil kann durch eine beliebige Verbindungsart erfolgen, beispielsweise durch Schweissen, Kleben , Niete oder Verschrauben.The plate can be connected to a tubular part by any type of connection, for example by welding, gluing, riveting or screwing.
Die für das Strukturbauteil eingesetzte Legierung kann auch zur Herstellung von Karosserieteilen, insbesondere in Form einer Zweiblechstruktur wie Motorhaube, Tür und Kofferraumdeckel eines Personenkraftwagens eingesetzt werden, was die Schrottverwertung oder Rezyklierbarkeit von Strukturbauteilen und Karosserieblechen wesentlich vereinfacht.The alloy used for the structural component can also be used for the production of body parts, in particular in the form of a two-sheet structure such as the bonnet, door and trunk lid of a motor vehicle, which considerably simplifies the scrap recycling or recyclability of structural components and body panels.
Das erfindungsgemässe Strukturbauteil ist besonders geeignet als Sicherheitsteil im Fahrzeugbau, insbesondere im Automobilbereich. Die erfindungsgemässe Legierung kann auf übliche Weise durch Strang- oder Bandgiessen, Warm- und/oder Kaltwalzen zum Blech oder Band verarbeitet werden. Zur Erzielung optimaler Eigenschaften bezüglich Crash- und Biege- verhalten hat sich als besonders vorteilhaft erwiesen, wenn eine Lösungsglü- hung in einem Banddurchlaufofen in einem Temperaturbereich von 520°C bis 580°C mit anschliessendem Abschrecken durchgeführt wird. Das Abschrecken kann auf übliche Weise, je nach Blechdicke zumeist mit Wasser oder mit Luft erfolgen. Bei der Lösungsglühung ist darauf zu achten, dass alle löslichen Be- standteile wie Si und Mg2 Si in feste Lösungen übergehen und nach dem Abkühlen im übersättigtem Zustand vorliegen. Die Abkühlgeschwindigkeit kann einen wesentlichen Effekt auf die mechanischen Eigenschaften ausüben, denn Si und Mg2Si scheiden sich bei zu langsamer Abkühlrate an den Korngrenzen aus und verschlechtern damit deutlich das Crash- und Biegeverhalten. Ausser- dem wird die Aushärtbarkeit und das Korrosionsverhalten beeinträchtigt.The structural component according to the invention is particularly suitable as a safety component in vehicle construction, in particular in the automotive sector. The alloy according to the invention can be processed in a customary manner by continuous casting or strip casting, hot and / or cold rolling into sheet metal or strip. In order to achieve optimal properties with regard to crash and bending behavior, it has proven to be particularly advantageous if solution annealing is carried out in a continuous belt furnace in a temperature range from 520 ° C. to 580 ° C. with subsequent quenching. Quenching can be carried out in the usual way, usually with water or with air, depending on the sheet thickness. When solution annealing, care must be taken to ensure that all soluble components such as Si and Mg 2 Si pass into solid solutions and are in the supersaturated state after cooling. The cooling rate can have a significant effect on the mechanical properties, because if the cooling rate is too slow, Si and Mg 2 Si separate out at the grain boundaries and thus significantly deteriorate the crash and bending behavior. In addition, the hardenability and the corrosion behavior are impaired.
Die erfindungsgemässen Strukturbauteile und Karosserieteile werden bevorzugt im warm ausgehärteten Zustand, insbesondere im Wärmebehandlungszustand T6, eingesetzt. Dieser Wärmebehandlungszustand kann bei Karosse- rieteilen während eines Lackeinbrennzyklus erzeugt werden.The structural components and body parts according to the invention are preferably used in the heat-cured state, in particular in the heat treatment state T6. This state of heat treatment can be generated in body parts during a paint baking cycle.
Die zur Herstellung der erfindungsgemässen Strukturbauteile und der Karosserieteile eingesetzten Bänder oder Bleche liegen bevorzugt in einem Dickenbereich von 0.8 bis 4 mm.The strips or sheets used to produce the structural components according to the invention and the body parts are preferably in a thickness range from 0.8 to 4 mm.
Die Bänder und Bleche können vor der Endbearbeitung zusätzlich chemisch oder elektrochemisch vorbehandelt und/oder mit einer Trockenschmierstoff- Beschichtung versehen werden.The strips and sheets can additionally be chemically or electrochemically pretreated and / or provided with a dry lubricant coating prior to finishing.
Weitere Vorteile, Merkmale und Einzelheiten der für die Herstellung der erfindungsgemässen Strukturbauteile und Karosserieteile eingesetzten Legie- rungsbleche ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispieie.Further advantages, features and details of the alloy used for the production of the structural components and body parts according to the invention tion plates result from the following description of preferred exemplary embodiments.
Beispiel 1example 1
Eine Legierung der Zusammensetzung (Gew.%)An alloy of the composition (% by weight)
0.82 Si 0.57 Mg 0.22 Fe 0.07 Cu 0.005 V 0.08 Mn0.82 Si 0.57 Mg 0.22 Fe 0.07 Cu 0.005 V 0.08 Mn
und eine für Automobilanwendungen eingesetzte Standardlegierung AA 6016 als Vergleichslegierung wurden auf übliche Weise durch Stranggiessen, Warm- und Kaltwalzen zu einem Blech mit einer Dicke von 1.2 mm verarbeitet. Die Lösungsglühung erfolgte bei 540°C mit anschliessender Abschreckung in Wasser.and a standard alloy AA 6016 used for automotive applications as a comparison alloy was processed in the usual way by continuous casting, hot and cold rolling to a sheet with a thickness of 1.2 mm. The solution was annealed at 540 ° C with subsequent quenching in water.
Die an Blechproben im Wärmebehandlungszustand T4 ermittelten mechanischen Eigenschaften und Umformkennwerte der erfindungsgemäss eingesetzten Legierung und der Vergleichslegierung sind einander in Tabelle 1 gegenübergestellt.The mechanical properties and forming characteristics of the alloy used according to the invention and the comparison alloy determined on sheet metal samples in the heat treatment state T4 are compared with one another in Table 1.
Tabelle 1Table 1
Die Ergebnisse von Tabelle 1 zeigen deutlich das bessere Biegeverhalten der erfindungsgemässen Legierung im Vergleich zur Standardlegierung AA 6016. The results in Table 1 clearly show the better bending behavior of the alloy according to the invention compared to the standard alloy AA 6016.
Beispiel 2Example 2
Eine Legierung der Zusammensetzung (Gew.%)An alloy of the composition (% by weight)
0.59 Si 0.55 Mg0.59 Si 0.55 Mg
0.15 Fe 0.07 Cu 0.10 V 0.08 Mn0.15 Fe 0.07 Cu 0.10 V 0.08 Mn
und eine für Automobilanwendungen eingesetzte Standardlegierung AA 6016 als Vergleichslegierung wurden auf übliche Weise durch Stranggiessen, Warm- und Kaltwalzen zu einem Blech mit einer Dicke von 1.5 mm verarbeitet. Die Lösungsglühung erfolgte bei 540°C mit anschliessender Abschreckung in Wasser.and a standard alloy AA 6016 used for automotive applications as a comparative alloy were processed in the usual way by continuous casting, hot and cold rolling to a sheet with a thickness of 1.5 mm. The solution was annealed at 540 ° C with subsequent quenching in water.
Tabelle 2Table 2
Die Ergebnisse von Tabelle 2 zeigen deutlich das bessere Crashverhalten der erfindungsgemässen Legierung im Vergleich zur Standardlegierung AA 6016, insbesondere im warmausgehärteten Zustand. The results in Table 2 clearly show the better crash behavior of the alloy according to the invention compared to the standard alloy AA 6016, in particular in the heat-hardened state.
Beispiel 3Example 3
Eine Legierung der Zusammensetzung (Gew.%)An alloy of the composition (% by weight)
0.60 Si 0.53 Mg0.60 Si 0.53 Mg
0.20 Fe 0.14 Cu 0.15 V 0.07 Mn0.20 Fe 0.14 Cu 0.15 V 0.07 Mn
und eine für Automobilanwendungen eingesetzte Standardlegierung AA 6016 als Vergleichslegierung wurden auf übliche Weise durch Stranggiessen, Warm- und Kaltwalzen zu einem Blech mit einer Dicke von 1.5 mm verarbeitet. Die Lösungsglühung erfolgte bei 560°C mit anschliessender Abschreckung in Wasser.and a standard alloy AA 6016 used for automotive applications as a comparative alloy were processed in the usual way by continuous casting, hot and cold rolling to a sheet with a thickness of 1.5 mm. The solution was annealed at 560 ° C with subsequent quenching in water.
Tabelle 3Table 3
Die Ergebnisse zeigen deutlich das bessere Crashverhalten der erfindungsge- mässen Legierung im Vergleich zur Standardlegierung AA 6016, insbesondere im warmausgehärteten Zustand.The results clearly show the better crash behavior of the inventive alloy compared to the standard alloy AA 6016, especially when hot-hardened.
Beispiel 4Example 4
Eine Legierung der Zusammensetzung (Gew.%)An alloy of the composition (% by weight)
0.57 Si 0.53 Mg 0.18 Fe 0.07 Cu 0.006 V 0.07 Mn0.57 Si 0.53 Mg 0.18 Fe 0.07 Cu 0.006 V 0.07 Mn
und eine für Automobilanwendungen eingesetzte Standardlegierung AA 6016 als Vergleichslegierung wurden auf übliche Weise durch Stranggiessen, Warm- und Kaltwalzen zu einem Blech mit einer Dicke von 2.0 mm verarbeitet. Die Lösungsglühung erfolgte bei 560°C mit anschliessender Abschreckung in Wasser.and a standard alloy AA 6016 used for automotive applications as a comparison alloy was processed in the usual way by continuous casting, hot and cold rolling to a sheet with a thickness of 2.0 mm. The solution was annealed at 560 ° C with subsequent quenching in water.
Tabelle 4Table 4
Die Ergebnisse von Tabelle 4 zeigen deutlich das bessere Crashverhalten der erfindungsgemässen Legierung in Vergleich zur Standardlegierung AA 6016, insbesondere im warmausgehärteten Zustand.The results of Table 4 clearly show the better crash behavior of the alloy according to the invention in comparison to the standard alloy AA 6016, especially when thermoset.
In den vorangehenden Beispielen 1 bis 4 bedeutenIn the preceding examples 1 to 4 mean
T4 Wärmebehandlungszustand Lösungsglühen, AbschreckenT4 Heat treatment condition solution annealing, quenching
T6 Wärmebehandlungszustand Lösungsglühen, Abschrecken, Warmauslagerung 210°C/30 min (T6 kann auch während eines Lackeinbrennzyklus erreicht werden) Rm Zugfestigkeit Rpo.2 Streckgrenze A10 Dehnung n5% Verfestigungsexponent n bei 5% Dehnung r r-Wert = mittlere senkrechte Anisotropie p f =- Biegefaktor (r- minimaler Innenradius, t Blechdicke)T6 heat treatment condition solution annealing, quenching, hot aging 210 ° C / 30 min (T6 can also be achieved during a paint baking cycle) R m tensile strength R p o .2 yield strength A 10 elongation n 5 % hardening exponent n at 5% elongation r r value = average vertical anisotropy pf = - bending factor (r- minimum inner radius, t sheet thickness)
Das Crashverhalten wurde in einem quasi-statischen Stauchversuch mit Noten von 1 bis 3 bewertet, wobei 3 die Bestnote ist. Der quasi-statische Stauchversuch dient zur Beurteilung von energieabsorbierenden Komponenten. Das gewünschte Verhalten ist charakterisiert durch ein regelmässiges Falten ohne Rissbildung. Das Erscheinungsbild der gestauchten Proben wurde mit den Noten 3 (keine Rissbildung, gleichmässige Faltung), 2 (aufgerauht, leicht eingerissen), und 1 (Rissbildung) beurteilt. The crash behavior was assessed in a quasi-static compression test with grades from 1 to 3, 3 being the top grade. The quasi-static compression test is used to assess energy-absorbing components. The desired behavior is characterized by regular folding without cracking. The appearance of the compressed samples was rated 3 (no cracking, even folding), 2 (roughened, slightly torn), and 1 (cracking).

Claims

Patentansprüche claims
1. Strukturbauteil aus einer Aluminiumlegierung vom Typ AlMgSi, mit hohem Aufnahmevermögen für kinetische Energie durch plastische Verformung,1. Structural component made of an aluminum alloy of the type AlMgSi, with high absorption capacity for kinetic energy due to plastic deformation,
dadurch gekennzeichnet, dasscharacterized in that
die Legierung (in Gew.%)the alloy (in% by weight)
Silizium 0.45 bis 0.85Silicon 0.45 to 0.85
Magnesium 0.35 bis 1.0Magnesium 0.35 to 1.0
Kupfer 0.05 bis 0.30Copper 0.05 to 0.30
Eisen 0.05 bis 0.25Iron 0.05 to 0.25
Vanadium max. 0.25Vanadium max. 0.25
Mangan max. 0J0Manganese max. 0J0
sowie herstellungsbedingte Verunreinigungen einzeln max. 0.05, insgesamt max. 0J5 und Aluminium als Rest enthält, und das Strukturbauteil aus gewalztem Band oder Blech der Legierung gefertigt ist.and manufacturing-related impurities individually max. 0.05, total max. 0J5 and aluminum as the rest contains, and the structural component is made of rolled strip or sheet of the alloy.
2. Strukturbauteil nach Anspruch 1 , dadurch gekennzeichnet, dass die Legierung 0.50 bis 0.80 Silizium enthält.2. Structural component according to claim 1, characterized in that the alloy contains 0.50 to 0.80 silicon.
3. Strukturbauteil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Legierung 0.40 bis 0.65 Magnesium enthält.3. Structural component according to claim 1 or 2, characterized in that the alloy contains 0.40 to 0.65 magnesium.
4. Strukturbauteil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Legierung 0.05 bis 0.20 Kupfer enthält.4. Structural component according to one of claims 1 to 3, characterized in that the alloy contains 0.05 to 0.20 copper.
5. Strukturbauteil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Legierung 0.05 bis 0.20 Eisen enthält. 5. Structural component according to one of claims 1 to 4, characterized in that the alloy contains 0.05 to 0.20 iron.
6. Strukturbauteil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Legierung max. 0.20 Vanadium enthält.6. Structural component according to one of claims 1 to 5, characterized in that the alloy max. Contains 0.20 vanadium.
7. Strukturbauteil nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass es zumindest ein aus Blech geformtes und zu einem rohrförmigen Teil oder Hohlkörper verbundenes Teil aufweist.7. Structural component according to one of claims 1 to 6, characterized in that it has at least one formed from sheet metal and connected to a tubular part or hollow part.
8. Strukturbauteil nach Anspruch 7, dadurch gekennzeichnet, dass das Teil durch Innenhochdruckumformen weiter umgeformt ist.8. Structural component according to claim 7, characterized in that the part is further formed by hydroforming.
9. Strukturbauteil nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Band oder Blech durch Strang- oder Bandgiessen, Warmund/oder Kaltwalzen und Lösungsglühen in einem Banddurchlaufofen in einem Temperaturbereich von 520°C bis 580°C mit anschliessendem Abschrecken gefertigt ist.9. Structural component according to one of claims 1 to 8, characterized in that the strip or sheet is manufactured by continuous casting or strip casting, hot and / or cold rolling and solution annealing in a continuous strip furnace in a temperature range from 520 ° C to 580 ° C with subsequent quenching .
10. Verwendung eines Strukturbauteils nach einem der Ansprüche 1 bis 9 als Sicherheitsteil im Fahrzeugbau.10. Use of a structural component according to one of claims 1 to 9 as a safety part in vehicle construction.
11. Karosserieteil aus einer Aluminiumlegierung vom Typ AlMgSi, mit hoher Biegefähigkeit ohne Riss- und Orangenhautausbildung, insbesondere in Form einer Zweiblechstruktur wie Motorhaube, Tür und Kofferraumdeckel eines Personenkraftwagens,11. Body part made of an aluminum alloy of the type AlMgSi, with high flexibility without crack and orange peel formation, in particular in the form of a two-sheet structure such as the bonnet, door and trunk lid of a passenger car,
dadurch gekennzeichnet, dasscharacterized in that
die Legierung (in Gew.%)the alloy (in% by weight)
Silizium 0.45 bis 0.85 Magnesium 0.35 bis 1.0 Kupfer 0.05 bis 0.30 Eisen 0.05 bis 0.25Silicon 0.45 to 0.85 Magnesium 0.35 to 1.0 Copper 0.05 to 0.30 Iron 0.05 to 0.25
Vanadium max. 0.25 Mangan max. 0J0Vanadium max. 0.25 manganese max. 0J0
sowie herstellungsbedingte Verunreinigungen einzeln max. 0.05, insgesamt max. 0J5 und Aluminium als Rest enthält.and manufacturing-related impurities individually max. 0.05, total max. 0J5 and aluminum as the rest.
12. Strukturbauteil nach Anspruch 11 , dadurch gekennzeichnet, dass die Legierung 0.50 bis 0.80 Silizium enthält.12. Structural component according to claim 11, characterized in that the alloy contains 0.50 to 0.80 silicon.
13. Strukturbauteil nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass die Legierung 0.40 bis 0.65 Magnesium enthält.13. Structural component according to claim 11 or 12, characterized in that the alloy contains 0.40 to 0.65 magnesium.
14. Strukturbauteil nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass die Legierung 0.05 bis 0.20 Kupfer enthält.14. Structural component according to one of claims 11 to 13, characterized in that the alloy contains 0.05 to 0.20 copper.
15. Strukturbauteil nach einem der Ansprüche 11 bis 14, dadurch gekennzeichnet, dass die Legierung 0.05 bis 0.20 Eisen enthält.15. Structural component according to one of claims 11 to 14, characterized in that the alloy contains 0.05 to 0.20 iron.
16. Strukturbauteil nach einem der Ansprüche 11 bis 15, dadurch gekennzeichnet, dass die Legierung max. 0.20 Vanadium enthält.16. Structural component according to one of claims 11 to 15, characterized in that the alloy max. Contains 0.20 vanadium.
17. Karosserieteil nach einem der Ansprüche 11 bis 16, dadurch gekennzeichnet, dass das Band oder Blech durch Strang- oder Bandgiessen, Warm- und/oder Kaltwalzen und Lösungsglühen in einem Banddurchlaufofen in einem Temperaturbereich von 520°C bis 580°C mit anschliessendem Abschrecken gefertigt ist.17. Body part according to one of claims 11 to 16, characterized in that the strip or sheet by continuous casting or strip casting, hot and / or cold rolling and solution annealing in a continuous strip furnace in a temperature range from 520 ° C to 580 ° C with subsequent quenching is made.
18. Verwendung eines Strukturbauteils nach einem der Ansprüche 1 bis 9 oder einem Karosserieteil nach einem der Ansprüche 11 bis 17 im warm ausgehärteten Zustand, insbesondere im Wärmebehandlungszustand T6. 18. Use of a structural component according to one of claims 1 to 9 or a body part according to one of claims 11 to 17 in the heat-cured state, in particular in the heat treatment state T6.
EP00903476A 1999-03-03 2000-02-18 USE OF AN ALUMINUM ALLOY OF THE AlMgSi TYPE AS SAFETY PART IN VEHICLES Expired - Lifetime EP1165848B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH00391/99A CH693673A5 (en) 1999-03-03 1999-03-03 Use of an aluminum alloy of the AlMgSi type for the production of structural components.
CH39199 1999-03-03
PCT/CH2000/000088 WO2000052216A1 (en) 1999-03-03 2000-02-18 STRUCTURAL COMPONENT MADE OF AN ALUMINUM ALLOY OF THE AlMgSi TYPE

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EP1165848B1 EP1165848B1 (en) 2003-05-14

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KR (1) KR100481231B1 (en)
AT (1) ATE240414T1 (en)
BR (1) BR0008629A (en)
CA (1) CA2363116C (en)
CH (1) CH693673A5 (en)
CZ (1) CZ20013107A3 (en)
DE (1) DE50002180D1 (en)
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PT1165848E (en) 2003-08-29
CH693673A5 (en) 2003-12-15
JP2002538305A (en) 2002-11-12
BR0008629A (en) 2001-12-18
TW530093B (en) 2003-05-01
CZ20013107A3 (en) 2002-08-14
EP1165848B1 (en) 2003-05-14
DE50002180D1 (en) 2003-06-18
DK1165848T3 (en) 2003-08-11
CA2363116A1 (en) 2000-09-08
ES2193048T3 (en) 2003-11-01
KR20010102456A (en) 2001-11-15
CA2363116C (en) 2006-04-25
WO2000052216A1 (en) 2000-09-08
KR100481231B1 (en) 2005-04-07

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