EP1165848B1 - USE OF AN ALUMINUM ALLOY OF THE AlMgSi TYPE AS SAFETY PART IN VEHICLES - Google Patents

USE OF AN ALUMINUM ALLOY OF THE AlMgSi TYPE AS SAFETY PART IN VEHICLES Download PDF

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Publication number
EP1165848B1
EP1165848B1 EP00903476A EP00903476A EP1165848B1 EP 1165848 B1 EP1165848 B1 EP 1165848B1 EP 00903476 A EP00903476 A EP 00903476A EP 00903476 A EP00903476 A EP 00903476A EP 1165848 B1 EP1165848 B1 EP 1165848B1
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alloy
maximum
ranging
sheet
suited
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German (de)
French (fr)
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EP1165848A1 (en
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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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    • 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

  • the invention relates to the use of an aluminum alloy of the type AlMgSi.
  • Crash behavior is an increasingly important aspect in vehicle construction; this applies to road traffic as well as to rail traffic.
  • Manufacturer of road and rail vehicles are moving more and more, special ones Dimension components or even entire assemblies of the vehicle so that they absorb as much energy as possible in a collision, to reduce the risk of injury to passengers.
  • crash elements are the mechanical ones Properties of the materials and joining zones used by of crucial importance.
  • the aim is the greatest possible absorption of energy before breaking. This can be due to a low ratio from yield strength to strength.
  • An important material characteristic is also a high stretch.
  • the requirements for are also to be observed the finished component.
  • a certain one Strength level certain minimum values of elongation, corrosion resistance or other essential parameters are specified.
  • EP-A-0805219 discloses a structural component made of an AlMgSi alloy for use in vehicle construction.
  • the structural component is made in a conventional manner manufactured by extrusion.
  • EP-A-0 801 139 discloses one for the production of im Components from a hollow body used in vehicle construction by means of AlMgSi alloy suitable for internal high pressure forming.
  • the alloy disclosed by document EP-A-0 801 139 contains in% by weight: 0.3-1.6 Si; 0.3-1.3 mg; ⁇ 0.9 Cu; ⁇ 0.5 Fe; 0.05-0.3 V; ⁇ 0.5 Mn; ⁇ 0.3 Co; ⁇ 0.3 Cr; ⁇ 0.8 Ni; ⁇ 0.3 Zr; as well as further alloy elements individually max. 0.05, max. 0.15 and Al as Rest.
  • Document EP-A-0 808 911 discloses a component and a safety part in US Pat Vehicle construction from an alloy in% by weight: 0.3-1.6 Si; 0.3-1.3 mg; ⁇ 0.9 Cu; ⁇ 0,5 Fe; 0.05-0.3 V; ⁇ 0.5 Mn; ⁇ 0.3 Co; ⁇ 0.3 Cr; ⁇ 0.8 Ni; ⁇ 0.3 Zr; as well as others Alloy elements individually max. 0.05, max. 0.15 and Al as the rest.
  • Document EP-A-0 714 993 A discloses rolled sheets made of an alloy suitable for the production of deep-drawn automobile body parts, which in% by weight contain the alloy elements Mg and Si by means of the trapezoid ABCDE with the coordinates: Si mg A 0.50 0.35 B 0.50 0.60 C 0.95 0.60 D 0.95 0.40 e 0.80 0.35 and 0.05-0.4 Cu; ⁇ 0.25 Fe; ⁇ 0.15 Mn; 0.05-0.2 V as an optional element; as well as further alloy elements individually max. 0.05, max. 0.15 and Al as the rest.
  • Document EP-A-0 811 700 discloses rolled sheets made of an alloy suitable for the production of deep-drawn automobile body parts, which in% by weight contain the alloy elements Mg and Si by means of the trapezoid ABCDE with the coordinates: Si mg A 0.50 0.35 B 0.50 0.60 C 0.95 0.60 D 0.95 0.40 e 0.80 0.35 and 0.15-0.45 Cu; 0.25-0.55 Fe; 0.05-0.20 Mn; 0.05-0.50 Zn; 0.05-0.2 V as an optional element; as well as further alloy elements individually max. 0.10, total max. 0.30 and Al as the rest.
  • the document US-A-4 525 326 discloses rolled sheets of an alloy which are described in US Pat % By weight: 0.3-1.2 Si; 0.3-1.0 mg; ⁇ 0.4 Cu; 0.1-0.5 Fe; 0.05-0.2 V; 1 / 2Fe to 2 / 3Fe Mn; and Al as the rest.
  • document US-A-4 525 326 discloses one Alloy in% by weight: 0.60 Si; 0.55 mg; 0.17 Cu; 0.21 Fe; 0.10 V; 0.06 Mn; and Al as the rest.
  • the invention has for its object a structural component to create which with extruded structural components achieved requirements with regard to crash behavior.
  • Alloy used for structural components also for the production of body parts can be used.
  • the structural component has a formed from sheet metal and part connected to 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 is further expanded by hydroforming reshaped.
  • connection of the sheet to a tubular part can be done by any Connection type, for example by welding, gluing rivets or screwing.
  • the alloy used for the structural component can also be used for production of body parts, in particular in the form of a two-sheet structure such as a bonnet, Door and trunk lid of a passenger car are used, what is the scrap recycling or recyclability of structural components and body panels significantly simplified.
  • the structural component is used as a safety part in vehicle construction, especially in the automotive sector.
  • the alloy can be processed in the usual way by continuous casting or strip casting, hot and / or cold rolling to form 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 constituents 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 Si and Mg 2 Si precipitate at the grain boundaries if the cooling rate is too slow 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 are preferred in the heat-cured state, especially in the heat treatment state T6, used.
  • This state of heat treatment can affect body parts generated during a paint baking cycle.
  • the strips or sheets used are preferably in a thickness range from 0.8 to 4 mm.
  • the strips and sheets can also be chemically treated before they are finished or pretreated electrochemically and / or with a dry lubricant coating be provided.
  • An alloy of the composition (% by weight) 0.59 Si 0.55 mg 0.15 Fe 0.07 Cu 0.10 V 0.08 mn and a standard alloy AA 6016 used for automotive applications as a comparative alloy was 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.
  • An alloy of the composition (% by weight) 0.60 Si 0.53 mg 0.20 Fe 0.14 Cu 0.15 V 0.07 mn 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. Solution annealing was carried out at 560 ° C. with subsequent quenching in water.
  • An alloy of the composition (% by weight) 0.57 Si 0.53 mg 0.18 Fe 0.07 Cu 0.006 V 0.07 mn 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. Solution annealing was carried out at 560 ° C. with subsequent quenching in water.
  • the crash behavior was determined in a quasi-static compression test with notes rated from 1 to 3, with 3 being the top grade.
  • the quasi-static compression test is used to assess energy-absorbing components.
  • the wished Behavior is characterized by regular folding without Cracking.
  • the appearance of the compressed samples was compared with the Notes 3 (no cracking, even folding), 2 (roughened, slightly torn), and 1 (crack formation).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (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)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Braking Arrangements (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Laminated Bodies (AREA)
  • Superstructure Of Vehicle (AREA)
  • Resistance Welding (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

Die Erfindung betrifft die Verwendung einer Aluminiumlegierung vom Typ AlMgSi.The invention relates to the use of an aluminum alloy of the type AlMgSi.

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 absorbieren, 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. Manufacturer of road and rail vehicles are moving more and more, special ones Dimension components or even entire assemblies of the vehicle so that they absorb as much energy as possible in a collision, to reduce the risk of injury to passengers. Next The structural design of these so-called crash elements are the mechanical ones Properties of the materials and joining zones used by of crucial importance. The aim is the greatest possible absorption of energy before breaking. This can be due to a low ratio from yield strength to strength. An important material characteristic is also a high stretch. The requirements for are also to be observed the finished component. In terms of construction, for example, a certain one Strength level, certain minimum values of elongation, corrosion resistance or other essential parameters are 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 wünschenswert, 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 developed a large number of aluminum alloys led for automotive applications. A single aluminum alloy would be ideal that could be used for various parts in automotive engineering. Especially with regard to the recycling of scrap or the recyclability of so-called space frame structures in automotive engineering, it would be desirable the frame parts manufactured today from extruded profiles, the Body panels as well as the structural components from one and the same To be able to manufacture alloy. Different components in one automobile however, often require different properties. For example an aluminum alloy should be very easy to form for exterior sheet metal applications to allow stretching, deep drawing and bending at the same time but 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 flexibility without cracking and Orange peel formation, as these components are often flared get connected.

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 made in a conventional manner manufactured by extrusion.

Die EP-A-0 801 139 offenbart eine zur Herstellung von im Fahrzeugbauverwendeten Bauteilen aus einem Hohlkörper durch Innenhochdruckumformen geeigneten Legierung von Typ AlMgSi.EP-A-0 801 139 discloses one for the production of im Components from a hollow body used in vehicle construction by means of AlMgSi alloy suitable for internal high pressure forming.

Die vom Dokument EP-A-0 801 139 offenbarte Legierung enthält in Gew-% : 0,3-1,6 Si; 0,3-1,3 Mg; ≤0,9 Cu; ≤0,5 Fe; 0,05-0,3 V; ≤0,5 Mn; ≤0,3 Co; ≤0.3 Cr; ≤0.8 Ni; ≤0.3 Zr; sowie weitere Legierungselemente einzeln max. 0,05, insgesamt max. 0,15 und Al als Rest.The alloy disclosed by document EP-A-0 801 139 contains in% by weight: 0.3-1.6 Si; 0.3-1.3 mg; ≤0.9 Cu; ≤0.5 Fe; 0.05-0.3 V; ≤0.5 Mn; ≤0.3 Co; ≤0.3 Cr; ≤0.8 Ni; ≤0.3 Zr; as well as further alloy elements individually max. 0.05, max. 0.15 and Al as Rest.

Das Dokument EP-A-0 808 911 offenbart ein Bauteil sowie ein Sicherheitsteil im Fahrzeugbau aus einer Legierung, die in Gew-% : 0,3-1,6 Si; 0,3-1,3 Mg; ≤0,9 Cu; ≤0,5 Fe; 0,05-0,3 V; ≤0,5 Mn; ≤0,3 Co; ≤0.3 Cr; ≤0.8 Ni; ≤0.3 Zr; sowie weitere Legierungselemente einzeln max. 0,05, insgesamt max. 0,15 und Al als Rest, enthält.Document EP-A-0 808 911 discloses a component and a safety part in US Pat Vehicle construction from an alloy in% by weight: 0.3-1.6 Si; 0.3-1.3 mg; ≤0.9 Cu; ≤0,5 Fe; 0.05-0.3 V; ≤0.5 Mn; ≤0.3 Co; ≤0.3 Cr; ≤0.8 Ni; ≤0.3 Zr; as well as others Alloy elements individually max. 0.05, max. 0.15 and Al as the rest.

Das Dokument EP-A-0 714 993 A offenbart zur Herstellung tiefgezogener Automobilkarroserieteile geeignete gewalzte Bleche aus einer Legierung, die in Gew-% den Gehalt der Legierungselemente Mg und Si durch das Trapez ABCDE mit den Koordinaten : Si Mg A 0,50 0,35 B 0,50 0,60 C 0,95 0,60 D 0,95 0,40 E 0,80 0,35 und 0,05-0,4 Cu; ≤0,25 Fe; ≤0,15 Mn; 0,05-0,2 V als optionales Element; sowie weitere Legierungselemente einzeln max. 0,05, insgesamt max. 0,15 und Al als Rest, enthält.Document EP-A-0 714 993 A discloses rolled sheets made of an alloy suitable for the production of deep-drawn automobile body parts, which in% by weight contain the alloy elements Mg and Si by means of the trapezoid ABCDE with the coordinates: Si mg A 0.50 0.35 B 0.50 0.60 C 0.95 0.60 D 0.95 0.40 e 0.80 0.35 and 0.05-0.4 Cu; ≤0.25 Fe; ≤0.15 Mn; 0.05-0.2 V as an optional element; as well as further alloy elements individually max. 0.05, max. 0.15 and Al as the rest.

Das Dokument EP-A-0 811 700 offenbart zur Herstellung tiefgezogener Automobilkarroserieteile geeignete gewalzte Bleche aus einer Legierung, die in Gew-% den Gehalt der Legierungselemente Mg und Si durch das Trapez ABCDE mit den Koordinaten : Si Mg A 0,50 0,35 B 0,50 0,60 C 0,95 0,60 D 0,95 0,40 E 0,80 0,35 und 0,15-0,45 Cu; 0,25-0,55 Fe; 0,05-0,20 Mn; 0,05-0,50 Zn; 0,05-0,2 V als optionales Element; sowie weitere Legierungselemente einzeln max. 0,10, insgesamt max. 0,30 und Al als Rest, enthält.Document EP-A-0 811 700 discloses rolled sheets made of an alloy suitable for the production of deep-drawn automobile body parts, which in% by weight contain the alloy elements Mg and Si by means of the trapezoid ABCDE with the coordinates: Si mg A 0.50 0.35 B 0.50 0.60 C 0.95 0.60 D 0.95 0.40 e 0.80 0.35 and 0.15-0.45 Cu; 0.25-0.55 Fe; 0.05-0.20 Mn; 0.05-0.50 Zn; 0.05-0.2 V as an optional element; as well as further alloy elements individually max. 0.10, total max. 0.30 and Al as the rest.

Das Dokument US-A-4 525 326 offenbart gewalzte Bleche aus einer Legierung, die in Gew-% : 0,3-1,2 Si; 0,3- 1,0 Mg; ≤0,4 Cu; 0,1-0,5 Fe; 0,05-0,2 V; 1/2Fe bis 2/3Fe Mn; und Al als Rest, enthält. Insbesondere offenbart das Dokument US-A-4 525 326 eine Legierung, die in Gew-% : 0,60 Si; 0,55 Mg; 0,17 Cu; 0,21 Fe; 0,10 V; 0,06 Mn; und Al als Rest, enthält.The document US-A-4 525 326 discloses rolled sheets of an alloy which are described in US Pat % By weight: 0.3-1.2 Si; 0.3-1.0 mg; ≤0.4 Cu; 0.1-0.5 Fe; 0.05-0.2 V; 1 / 2Fe to 2 / 3Fe Mn; and Al as the rest. In particular, document US-A-4 525 326 discloses one Alloy in% by weight: 0.60 Si; 0.55 mg; 0.17 Cu; 0.21 Fe; 0.10 V; 0.06 Mn; and Al as the rest.

Der Erfindung liegt die Aufgabe zugrunde, ein Strukturbauteil 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 has for its object a structural component to create which with extruded structural components achieved requirements with regard to crash behavior. In addition, the Alloy used for structural components also for the production of body parts can be used.

Zur erfindungsgemässen Lösung der Aufgabe führt eine Verwendung mit dem Merkmalen von Anspruch 1. Use according to the invention has the features of claim 1.

Das Strukturbauteil weist 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. Der rohrförmige Teil ist durch Innenhochdruckumformen weiter umgeformt.The structural component has a formed from sheet metal and part connected to 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 is further expanded by hydroforming reshaped.

Die Verbindung des Blechs zu einem rohrförmigen Teil kann durch eine beliebige Verbindungsart erfolgen, beispielsweise durch Schweissen, Kleben Niete oder Verschrauben.The connection of the sheet to a tubular part can be done by any Connection type, for example by welding, gluing rivets 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 production of body parts, in particular in the form of a two-sheet structure such as a bonnet, Door and trunk lid of a passenger car are used, what is the scrap recycling or recyclability of structural components and body panels significantly simplified.

Das Strukturbauteil ist verwendet als Sicherheitsteil im Fahrzeugbau, insbesondere im Automobilbereich. The structural component is used as a safety part in vehicle construction, especially in the automotive sector.

Die 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 Biegeverhalten hat sich als besonders vorteilhaft erwiesen, wenn eine Lösungsglühung 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 Bestandteile 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. Ausserdem wird die Aushärtbarkeit und das Korrosionsverhalten beeinträchtigt.The alloy can be processed in the usual way by continuous casting or strip casting, hot and / or cold rolling to form sheet metal or strip. To achieve optimum 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 constituents 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 Si and Mg 2 Si precipitate at the grain boundaries if the cooling rate is too slow and thus significantly deteriorate the crash and bending behavior. In addition, the hardenability and the corrosion behavior are impaired.

Die Strukturbauteile und Karosserieteile werden bevorzugt im warm ausgehärteten Zustand, insbesondere im Wärmebehandlungszustand T6, eingesetzt. Dieser Wärmebehandlungszustand kann bei Karosserieteilen während eines Lackeinbrennzyklus erzeugt werden.The structural components and body parts are preferred in the heat-cured state, especially in the heat treatment state T6, used. This state of heat treatment can affect body parts generated during a paint baking cycle.

Die zur Herstellung der Strukturbauteile und der Karosserieteile eingesetzten Bänder oder Bleche liegen bevorzugt in einem Dickenbereich von 0.8 bis 4 mm.Those for the production of structural components and body parts The strips or sheets used 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 also be chemically treated before they are finished or pretreated electrochemically and / or with a dry lubricant coating be provided.

Weitere Vorteile, Merkmale und Einzelheiten der für die Herstellung der Strukturbauteile und Karosserieteile eingesetzten Legierungsbleche ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele. Other advantages, features and details of the manufacture of the Structural components and body parts used alloy sheets emerge from the description below more preferred Embodiments.

Beispiel 1example 1

Eine Legierung der Zusammensetzung (Gew.%)
   0.59 Si
   0.55 Mg
   0.15 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. Zustand Rm MPa Rp0.2 MPa A10 % n5% r f=ri/t Crashverhalten Erfindung T4 222 113 25.8 0.30 0.57 <0.1 3 Erfindung T6 263 229 11.5 - - 0.25 3 AA 6016 T4 254 138 28.5 0.29 0.59 0.30 3 AA 6016 T6 295 258 14.2 - - 0.60 1 An alloy of the composition (% by weight)
0.59 Si
0.55 mg
0.15 Fe
0.07 Cu
0.10 V
0.08 mn
and a standard alloy AA 6016 used for automotive applications as a comparative alloy was 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. Status R m MPa R p0.2 MPa A 10 % n 5% r f = r i / t crashworthiness invention T4 222 113 25.8 00:30 00:57 <0.1 3 invention T6 263 229 11.5 - - 00:25 3 AA 6016 T4 254 138 28.5 00:29 00:59 00:30 3 AA 6016 T6 295 258 14.2 - - 0.60 1

Die Ergebnisse von Tabelle 1 zeigen deutlich das bessere Crashverhalten der erfindungsgemässen Legierung im Vergleich zur Standardlegierung AA 6016, insbesondere im warmausgehärteten Zustand.The results of Table 1 clearly show the better crash behavior of the alloy according to the invention in comparison to the standard alloy AA 6016, especially when thermoset.

Beispiel 2Example 2

Eine Legierung der Zusammensetzung (Gew.%)
   0.60 Si
   0.53 Mg
   0.20 Fe
   0.14 Cu
   0.15 V
   0.07 Mn
und eine für Automobilanwendungen eingesetzte Standardlegierung AA 6016 als Vergleichstegierung 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. Zustand Rm MPa Rp0.2 MPa A10 % n5% r f=ri/t Crashverhalten Erfindung T4 212 112 26.4 0.28 0.52 0.15 3 Erfindung T6 243 199 13.8 - - 0.25 3 AA 6016 T4 232 124 27.6 0.29 0.61 0.40 2 AA 6016 T6 283 211 17.9 - - 0.65 1 An alloy of the composition (% by weight)
0.60 Si
0.53 mg
0.20 Fe
0.14 Cu
0.15 V
0.07 mn
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. Solution annealing was carried out at 560 ° C. with subsequent quenching in water. Status R m MPa R p0.2 MPa A 10 % n 5% r f = r i / t crashworthiness invention T4 212 112 26.4 00:28 00:52 00:15 3 invention T6 243 199 13.8 - - 00:25 3 AA 6016 T4 232 124 27.6 00:29 0.61 00:40 2 AA 6016 T6 283 211 17.9 - - 0.65 1

Die Ergebnisse zeigen deutlich das bessere Crashverhalten der erfindungsgemässen 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, in particular in the hardened state.

Beispiel 3Example 3

Eine Legierung der Zusammensetzung (Gew.%)
   0.57 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. Zustand Rm MPa Rp0.2 MPa A10 % n5% r f=ri/t Crashverhalten Erfindung T4 191 120 24.4 0.22 0.50 0.10 3 Erfindung T6 257 226 11.5 - - 0.30 3 AA 6016 T4 215 131 24.8 0.24 0.58 0.40 2 AA 6016 T6 297 223 12.8 - - 0.70 1 An alloy of the composition (% by weight)
0.57 Si
0.53 mg
0.18 Fe
0.07 Cu
0.006 V
0.07 mn
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. Solution annealing was carried out at 560 ° C. with subsequent quenching in water. Status R m MPa R p0.2 MPa A 10 % n 5% r f = r i / t crashworthiness invention T4 191 120 24.4 00:22 00:50 00:10 3 invention T6 257 226 11.5 - - 00:30 3 AA 6016 T4 215 131 24.8 00:24 00:58 00:40 2 AA 6016 T6 297 223 12.8 - - 0.70 1

Die Ergebnisse von Tabelle 3 zeigen deutlich das bessere Crashverhalten der erfindungsgemässen Legierung in Vergleich zur Standardlegierung AA 6016, insbesondere im warmausgehärteten Zustand.The results of Table 3 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 3 bedeuten

T4
Wärmebehandlungszustand Lösungsglühen, Abschrecken
T6
Wärmebehandlungszustand Lösungsglühen, Abschrecken, Warmauslagerung 210°C/30 min (T6 kann auch während eines Lackeinbrennzyklus erreicht werden)
Rm
Zugfestigkeit
Rp0.2
Streckgrenze
A10
Dehnung
n5%
Verfestigungsexponent n bei 5% Dehnung
r
r-Wert = mittlere senkrechte Anisotropie
f = n / t
Biegefaktor (ri minimaler Innenradius, t Blechdicke)
In the preceding examples 1 to 3 mean
T4
Heat treatment condition solution annealing, quenching
T6
Heat treatment condition solution annealing, quenching, heat aging 210 ° C / 30 min (T6 can also be achieved during a paint baking cycle)
R m
tensile strenght
R p0.2
Stretch limit
A 10
strain
n 5%
Solidification exponent n at 5% elongation
r
r-value = mean vertical anisotropy
f = n / t
Bending factor (r i 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 determined in a quasi-static compression test with notes rated from 1 to 3, with 3 being the top grade. The quasi-static compression test is used to assess energy-absorbing components. The wished Behavior is characterized by regular folding without Cracking. The appearance of the compressed samples was compared with the Notes 3 (no cracking, even folding), 2 (roughened, slightly torn), and 1 (crack formation).

Claims (3)

  1. Use of an aluminium alloy of the AlMgSi type having the composition (in % by weight) silicon 0.50 to 0.60 magnesium 0.40 to 0.65 copper 0.05 to 0.20 iron 0.05 to 0.20 vanadium max. 0.20 manganese max. 0.10
    as well as impurities due to production individually to a maximum of 0.05 and altogether to a maximum of 0.15, with the remainder aluminium, for a component formed from rolled sheet or strip, joined to a tubular part or hollow body and formed further by internal high-pressure forming used as a safety component in vehicle construction.
  2. Use according to claim 1, characterised in that the strip or sheet is produced by continuous casting or strip casting, hot and/or cold rolling and solution annealing in a belt kiln at a temperature within the range of 520°C to 580°C with subsequent quenching.
  3. Use according to claim 1 or claim 2 in the artificially aged 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

Publications (2)

Publication Number Publication Date
EP1165848A1 EP1165848A1 (en) 2002-01-02
EP1165848B1 true EP1165848B1 (en) 2003-05-14

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CH (1) CH693673A5 (en)
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ES (1) ES2193048T3 (en)
PT (1) PT1165848E (en)
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WO (1) WO2000052216A1 (en)

Families Citing this family (14)

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Publication number Priority date Publication date Assignee Title
EP1380661A1 (en) * 2002-07-05 2004-01-14 Alcan Technology &amp; Management Ltd. Article made of AlMgSi alloy with a decorative anodic oxide layer
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 &amp; Management Ltd. Car body component
JP4933788B2 (en) * 2006-02-13 2012-05-16 本田技研工業株式会社 Bulge molding method and hollow molded body
CN100453671C (en) * 2006-12-12 2009-01-21 苏州有色金属加工研究院 Al-Mg-Si-Cu alloy for automobile and its production process
DE102008008326A1 (en) 2008-02-07 2011-03-03 Audi Ag aluminum alloy
EP2156945A1 (en) 2008-08-13 2010-02-24 Novelis Inc. Clad automotive sheet product
US9067623B2 (en) 2012-03-28 2015-06-30 Alcoa Inc. Crashworthy structures formed of multilayered metallic materials
CN106414782B (en) * 2014-01-21 2020-01-31 奥科宁克公司 6XXX aluminium alloy
EP3497256B1 (en) * 2016-08-15 2020-07-01 Hydro Aluminium Rolled Products GmbH Aluminum alloy and aluminum alloy strip for pedestrian impact protection
US11345980B2 (en) 2018-08-09 2022-05-31 Apple Inc. Recycled aluminum alloys from manufacturing scrap with cosmetic appeal
CN111979457A (en) * 2020-08-12 2020-11-24 烟台南山学院 Ultrahigh-plasticity aluminum alloy and preparation method thereof
CN112342442A (en) * 2020-11-23 2021-02-09 超捷紧固系统(上海)股份有限公司 Method for manufacturing and preparing materials by using aluminum functional connecting piece and fastening piece
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JPH05112840A (en) * 1991-10-18 1993-05-07 Nkk Corp Baking hardenability al-mg-si alloy sheet excellent in press formability and its manufacture
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CH688379A5 (en) * 1994-11-29 1997-08-29 Alusuisse Lonza Services Ag Thermaformed and weldable aluminum alloy of the AlMgSi type
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JP3686146B2 (en) * 1995-11-27 2005-08-24 古河スカイ株式会社 Method for producing aluminum alloy sheet for forming
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DE69633002T2 (en) * 1996-05-03 2005-07-21 Aluminum Company Of America Vehicle frame components with improved energy absorption capability, method for their manufacture and an alloy
EP0808911A1 (en) * 1996-05-22 1997-11-26 Alusuisse Technology &amp; Management AG Component
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EP0931170A1 (en) * 1996-09-30 1999-07-28 Alcan International Limited Aluminium alloy for rolled product process

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CA2363116A1 (en) 2000-09-08
ATE240414T1 (en) 2003-05-15
WO2000052216A1 (en) 2000-09-08
EP1165848A1 (en) 2002-01-02
CH693673A5 (en) 2003-12-15
KR100481231B1 (en) 2005-04-07
KR20010102456A (en) 2001-11-15
BR0008629A (en) 2001-12-18
DE50002180D1 (en) 2003-06-18
JP2002538305A (en) 2002-11-12
TW530093B (en) 2003-05-01
PT1165848E (en) 2003-08-29
DK1165848T3 (en) 2003-08-11
ES2193048T3 (en) 2003-11-01
CZ20013107A3 (en) 2002-08-14
CA2363116C (en) 2006-04-25

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