EP1118686B1 - Aluminium cast alloy - Google Patents

Aluminium cast alloy Download PDF

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EP1118686B1
EP1118686B1 EP01810014A EP01810014A EP1118686B1 EP 1118686 B1 EP1118686 B1 EP 1118686B1 EP 01810014 A EP01810014 A EP 01810014A EP 01810014 A EP01810014 A EP 01810014A EP 1118686 B1 EP1118686 B1 EP 1118686B1
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max
alloy
use according
weight
alloy contains
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German (de)
French (fr)
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EP1118686A1 (en
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Hubert Koch
Horst Schramm
Peter Krug
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Aluminium Rheinfelden GmbH
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Aluminium Rheinfelden GmbH
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    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/12—Making non-ferrous alloys by processing in a semi-solid state, e.g. holding the alloy in the solid-liquid phase
    • 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

Definitions

  • the invention relates to the use of an aluminum alloy for die casting, for thixocasting or thixo forging.
  • Die casting technology has developed so far today that it is possible To produce castings with high quality standards.
  • the quality of one Die-cast piece depends not only on the machine setting and the selected method, but also to a large extent from the chemical Composition and structure of the cast alloy used. These last two parameters are known to influence the Pourability, the feeding behavior (G. Schindelbauer, J. Czikel “Mold filling capacity and volume deficit of common aluminum die casting alloys " Giessereiforschung 42, 1990, pp. 88/89), the mechanical properties and - particularly important in die casting - the lifespan of the Casting tools (L.A. Norström, B. Klarenfjord, M. Svenson "General Aspects on Wash-out Mechanism in Aluminum Diecasting Dies ", 17th International NADCA Diecasting Congress 1993, Cleveland OH).
  • EP-A-808 911 or EP-A-801 139 disclose AlMg alloys with the participation of Mn, Co, V and Zr.
  • AlMg alloys are also known, which are characterized by high ductility distinguished. Such an alloy is for example in US-A-5 573 606. However, these alloys have the disadvantage of high mold wear and bring problems with molding what productivity significantly reduced.
  • EP-A-0 911 420 describes an aluminum alloy suitable for die casting, thixocasting and thixo forging with (in% by weight) 2.0-3.5 mg, 0.15-0.35 Si, 0, 20 - 1.2 Mn, max. 0.40 Fe, max. 0.10 Cu max. 0.05 Cr, max. 0.10 Zu, max. 0.003 Be, max. 0.20 Ti, max. 0.60 Co and max. 0.80 Ce known.
  • the alloy should also be easy to weld, a high corrosion resistance have and in particular no susceptibility to stress corrosion cracking demonstrate.
  • the one used to make the alloy The degree of purity of the aluminum used corresponds to a smelting aluminum quality Al 99.8 H.
  • the alloy content is set as a general condition to keep close to the wrought alloy groups so that when later recycling of alloys used in vehicle construction, for example a reusable alloy system is retained or with mixing associated with an increase in entropy is limited.
  • the alloy In the as-cast state, the alloy has a well molded ⁇ phase.
  • the eutectic predominantly made of Al 6 (Mn, Fe) phases, is very fine and therefore leads to a highly ductile fracture behavior.
  • the manganese content prevents sticking in the mold and ensures good mold release.
  • the magnesium content in connection with manganese gives the casting a high level of design stability, so that very little or no distortion can be expected even when demolding.
  • this alloy can also be used for use thixocasting or thixo forging.
  • the ⁇ phase forms in the Remelt immediately, giving excellent thixotropic properties available. At the usual heating speeds, a grain size becomes of ⁇ 100 ⁇ m.
  • Zircon increases the proof stress and produces a finer grain, so that the required mechanical properties, in particular the yield strength in the as-cast state, can be achieved.
  • the tendency of the casting to stick in the mold can be drastically reduced and the molding behavior can be significantly improved if additional is added to manganese cobalt and / or cerium.
  • the alloy preferably contains therefore 0.3 to 0.6% by weight of cobalt and / or 0.05 to 0.8% by weight, in particular 0.1 to 0.5% by weight of cerium.
  • the alloy contains 0.005 to 0.15% by weight, in particular 0.01 to 0.03 % By weight vanadium in order to improve the pourability or the flowability. Tests have shown that the mold filling capacity can be determined by a Vanadium addition is significantly improved. It also prevents vanadium the tendency to scratch known with AIMg alloys, especially because no beryllium is added to the alloy.
  • the aluminum alloy is particularly suitable for thixocasting or thixo forging.
  • the aluminum alloy is intended in particular for processing in die casting, it can of course also be cast using other methods, for example sand casting gravity die Low-pressure casting Thixocasting / Thixoforging Squeeze casting
  • the alloy is easy to weld, shows excellent casting behavior, a practically negligible tendency to stick and can be shaped well.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Forging (AREA)

Description

Die Erfindung betrifft die Verwendung einer Aluminium Legierung zum Druckgiessen, für das Thixocasting oder das Thixoschmieden.The invention relates to the use of an aluminum alloy for die casting, for thixocasting or thixo forging.

Die Druckgusstechnik hat sich heute soweit entwickelt, dass es möglich ist, Gussstücke mit hohen Qualitätsansprüchen herzustellen. Die Qualität eines Druckgussstückes hängt aber nicht nur von der Maschineneinstellung und dem gewählten Verfahren ab, sondern in hohem Masse auch von der chemischen Zusammensetzung und der Gefügestruktur der verwendeten Gusslegierung. Diese beiden letztgenannten Parameter beeinflussen bekanntermassen die Giessbarkeit, das Speisungsverhalten (G. Schindelbauer, J. Czikel "Formfüllungsvermögen und Volumendefizit gebräuchlicher Aluminiumdruckgusslegierungen" Giessereiforschung 42, 1990, S. 88/89), die mechanischen Eigenschaften und - im Druckguss ganz besonders wichtig -- die Lebensdauer der Giesswerkzeuge (L.A. Norström, B. Klarenfjord, M. Svenson "General Aspects on Wash-out Mechanism in Aluminium Diecasting Dies", 17. International NADCA Diecastingcongress 1993, Cleveland OH).Die casting technology has developed so far today that it is possible To produce castings with high quality standards. The quality of one Die-cast piece depends not only on the machine setting and the selected method, but also to a large extent from the chemical Composition and structure of the cast alloy used. These last two parameters are known to influence the Pourability, the feeding behavior (G. Schindelbauer, J. Czikel "Mold filling capacity and volume deficit of common aluminum die casting alloys " Giessereiforschung 42, 1990, pp. 88/89), the mechanical properties and - particularly important in die casting - the lifespan of the Casting tools (L.A. Norström, B. Klarenfjord, M. Svenson "General Aspects on Wash-out Mechanism in Aluminum Diecasting Dies ", 17th International NADCA Diecasting Congress 1993, Cleveland OH).

In der Vergangenheit wurde der Entwicklung von speziell für den Druckguss anspruchsvoller Gussstücke geeigneten Legierungen wenig Aufmerksamkeit geschenkt. Die meisten Anstrengungen wurden auf die Weiterentwicklung der Verfahrenstechnik des Druckgussprozesses verwendet. Gerade von Konstrukteuren der Automobilindustrie wird aber immer mehr gefordert, schweissbare Bauteile mit hoher Duktilität im Druckguss zu realisieren, da bei hohen Stückzahlen der Druckguss die kostengünstigste Produktionsmethode darstellt. In the past, development was made specifically for die casting little attention is paid to alloys suitable for demanding castings given. Most efforts have been focused on the further development of the Process engineering of the die casting process used. Especially by designers The automotive industry, however, is facing increasing demands for weldability To realize components with high ductility in die casting, because of the high number of pieces die casting is the cheapest production method.

Durch die Weiterentwicklung der Druckgusstechnik ist es heute möglich, schweissbare und wärmebehandelbare Gussstücke von hoher Qualität herzustellen. Dies hat den Anwendungsbereich für Druckgussteile auf sicherheitsrelevante Komponenten erweitert. Für derartige Komponenten werden heute üblicherweise AISiMg-Legierungen eingesetzt, da diese eine gute Giessbarkeit bei geringem Formenverschleiss aufweisen. Damit die geforderten mechanischen Eigenschaften, insbesondere eine hohe Bruchdehnung, erreicht werden können, müssen die Gussteile einer Wärmebehandlung unterzogen werden. Diese Wärmebehandlung ist zur Einformung der Gussphasen und damit zur Erzielung eines zähen Bruchverhaltens notwendig. Eine Wärmebehandlung bedeutet in der Regel eine Lösungsglühung bei Temperaturen knapp unterhalb der Solidustemperatur mit nachfolgendem Abschrecken in Wasser oder einem anderen Medium auf Temperaturen <100°C. Der so behandelte Werkstoff weist nun eine geringe Dehngrenze und Zugfestigkeit auf. Um diese Eigenschaften auf den gewünschten Wert zu heben, wird anschliessend eine Warmauslagerung durchgeführt. Diese kann auch prozessbedingt erfolgen, z.B. durch eine thermische Beaufschlagung beim Lackieren oder durch das Entspannungsglühen einer ganzen Bauteilgruppe.Due to the further development of die casting technology, it is now possible manufacture weldable and heat-treatable castings of high quality. This has the scope for die-cast parts on safety-related Components expanded. For such components are common today AISiMg alloys are used because they are easy to cast with little mold wear. So that the required mechanical Properties, in particular a high elongation at break, can be achieved the castings must be subjected to heat treatment. This heat treatment is for molding the casting phases and thus for Achieving tough fracture behavior is necessary. A heat treatment usually means solution annealing at temperatures just below the solidus temperature with subsequent quenching in water or a other medium at temperatures <100 ° C. The material treated in this way has now have a low yield strength and tensile strength. To these properties To raise to the desired value is then a hot aging process carried out. This can also be done depending on the process, e.g. by a thermal exposure during painting or by relaxation annealing an entire component group.

Da Druckgussstücke endabmessungsnah gegossen werden, haben sie meist eine komplizierte Geometrie mit dünnen Wandstärken. Während des Lösungsglühens und besonders beim Abschreckprozess muss mit Verzug gerechnet werden, der eine Nacharbeit z.B. durch Richten der Gussstücke oder im schlimmsten Fall Ausschuss nach sich ziehen kann. Die Lösungsglühung verursacht zudem zusätzliche Kosten und die Wirtschaftlichkeit dieser Produktionsmethode könnte wesentlich erhöht werden, wenn Legierungen zur Verfügung stehen würden, die die geforderten Eigenschaften ohne eine Wärmebehandlung erfüllen.Since die castings are cast close to their final dimensions, they usually have a complicated geometry with thin walls. During solution annealing and especially in the quenching process, delays must be expected which requires rework e.g. by straightening the castings or in worst case rejects. Solution annealing causes additional costs and the economic viability of this production method could be increased significantly if alloys are available would stand the required properties without heat treatment fulfill.

EP-A-808 911 oder EP-A-801 139 offenbaren AlMg-Legierungen mit Beteiligung von Mn, Co, V und Zr.EP-A-808 911 or EP-A-801 139 disclose AlMg alloys with the participation of Mn, Co, V and Zr.

Es sind auch AlMg-Legierungen bekannt, die sich durch eine hohe Duktilität auszeichnen. Eine derartige Legierung ist beispielsweise in der US-A-5 573 606 offenbart. Diese Legierungen haben aber den Nachteil eines hohen Formenverschleisses und bringen Probleme beim Ausformen, was die Produktivität erheblich verringert.AlMg alloys are also known, which are characterized by high ductility distinguished. Such an alloy is for example in US-A-5 573 606. However, these alloys have the disadvantage of high mold wear and bring problems with molding what productivity significantly reduced.

Aus der EP-A-0 911 420 ist eine zum Druckgiessen, für das Thixocasting und das Thixoschmieden geeignete Aluminiumlegierung mit (in gew.-%) 2,0 - 3,5 Mg, 0,15 - 0,35 Si, 0,20 - 1,2 Mn, max. 0.40 Fe, max. 0,10 Cu max. 0,05 Cr, max. 0,10 Zu, max. 0.003 Be, max. 0.20 Ti, max. 0,60 Co und max. 0,80 Ce bekannt.EP-A-0 911 420 describes an aluminum alloy suitable for die casting, thixocasting and thixo forging with (in% by weight) 2.0-3.5 mg, 0.15-0.35 Si, 0, 20 - 1.2 Mn, max. 0.40 Fe, max. 0.10 Cu max. 0.05 Cr, max. 0.10 Zu, max. 0.003 Be, max. 0.20 Ti, max. 0.60 Co and max. 0.80 Ce known.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Druckgusslegierung mit hoher Bruchdehnung bei noch akzeptabler Dehngrenze zu schaffen, die eine gute Giessbarkeit aufweist und in der Form möglichst wenig klebt. Die folgenden Minimalwerte müssen im Gusszustand erreicht werden:

  • Dehnung (A5): 14% Dehngrenze (Rp 0.2): 100 MPa
    • The present invention has for its object to provide a die-cast alloy with a high elongation at break with an acceptable yield strength, which has good castability and sticks as little as possible in the mold. The following minimum values must be achieved in the as-cast state:
  • Elongation (A5): 14% proof stress (Rp 0.2): 100 MPa

    • Die Legierung soll zudem gut schweissbar sein, einen hohen Korrosionswiderstand aufweisen und insbesondere keine Anfälligkeit für Spannungsrisskorrosion zeigen.The alloy should also be easy to weld, a high corrosion resistance have and in particular no susceptibility to stress corrosion cracking demonstrate.

    Zur erfindungsgemässen Lösung führt eine Legierung mit der Zusammensetzung gemäß Anspruch 1. An alloy with the A composition according to claim 1.

    Der zur Herstellung der Legierung verwendete Reinheitsgrad des Aluminiums entspricht einem Hütten-Aluminium der Qualität Al 99.8 H.The one used to make the alloy The degree of purity of the aluminum used corresponds to a smelting aluminum quality Al 99.8 H.

    Heute wird zum Schweissen immer mehr das Laserschweissverfahren eingesetzt. Bei diesem Verfahren wird in einem relativ kleinen Bereich eine hohe Temperatur erzeugt, so dass niedrig schmelzende Elemente in dieser Gusslegierung minimiert werden müssen, um die Entstehung von Metalldampf und damit eine erhöhte Porosität gering zu halten. Die Legierung darf daher kein Beryllium enthalten.Today, laser welding is increasingly used for welding. With this method, a high level is achieved in a relatively small area Temperature creates, so low melting elements in this cast alloy must be minimized to the formation of metal vapor and thus keeping an increased porosity low. The alloy therefore must not contain beryllium.

    Des weiteren ist als Rahmenbedingung gesetzt, den Legierungsgehalt in die Nähe der Knetlegierungsgruppen zu halten, damit beim späteren Recycling von beispielsweise im Fahrzeugbau eingesetzten Legierungen ein wiederverwendbares Legierungssystem erhalten bleibt bzw. die mit einer Entropieerhöhung einhergehende Vermischung sich in Grenzen hält.Furthermore, the alloy content is set as a general condition to keep close to the wrought alloy groups so that when later recycling of alloys used in vehicle construction, for example a reusable alloy system is retained or with mixing associated with an increase in entropy is limited.

    Die Legierung weist im Gusszustand eine gut eingeformte α-Phase auf. Das Eutektikum, überwiegend aus Al6(Mn, Fe)-Phasen, ist sehr fein ausgebildet und führt daher zu einem hochduktilen Bruchverhalten. Durch den Anteil an Mangan wird das Kleben in der Form vermieden und eine gute Entformbarkeit gewährleistet. Der Magnesiumgehalt in Verbindung mit Mangan gibt dem Gussstück eine hohe Gestaltsfestigkeit, so dass auch beim Entformen mit sehr geringem bis gar keinem Verzug zu rechnen ist.In the as-cast state, the alloy has a well molded α phase. The eutectic, predominantly made of Al 6 (Mn, Fe) phases, is very fine and therefore leads to a highly ductile fracture behavior. The manganese content prevents sticking in the mold and ensures good mold release. The magnesium content in connection with manganese gives the casting a high level of design stability, so that very little or no distortion can be expected even when demolding.

    Aufgrund der bereits eingeformten α-Phase lässt sich diese Legierung auch für das Thixocasting bzw. Thixoschmieden einsetzen. Die α-Phase formt sich beim Wiederaufschmelzen sofort ein, so dass hervorragende thixotrope Eigenschaften vorliegen. Bei den üblichen Aufheizgeschwindigkeiten wird eine Korngrösse von <100µm erzeugt.Due to the already molded α phase, this alloy can also be used for use thixocasting or thixo forging. The α phase forms in the Remelt immediately, giving excellent thixotropic properties available. At the usual heating speeds, a grain size becomes of <100µm.

    Zur Erzielung einer hohen Duktilität ist von wesentlicher Bedeutung, dass der Eisengehalt in der Legierung eingeschränkt wird. Überraschenderweise hat sich gezeigt, dass die Legierungszusammensetzung trotz geringem Eisengehalt nicht zum Kleben in der Form neigt. Entgegen der allgemeinen Ansicht, dass mit hohen Eisengehalten von mehr als 1.2 Gew.-% ein Kleben in der Form in jedem Fall verhindert werden kann, hat sich beim vorgeschlagenen Legierungstyp herausgestellt, dass bei Erhöhung des Eisengehaltes auf mehr als 0.7 Gew.-% bereits wieder eine Zunahme der Klebeneigung beobachtet wird.To achieve high ductility, it is essential that the Iron content in the alloy is restricted. Surprisingly it was shown that the alloy composition despite low iron content does not tend to stick in the mold. Contrary to the general View that with high iron contents of more than 1.2% by weight Sticking in the form can be prevented in any case proposed alloy type found that when increasing an increase in the iron content to more than 0.7% by weight the tendency to stick is observed.

    Für die einzelnen Legierungselemente werden die folgenden Gehaltsbereiche bevorzugt: Magnesium 0.60 bis 1.2 Gew.-% Mangan 0.8 bis 1.6 Gew.-% Kobalt 0.3 bis 0.6 Gew.-% Vanadium 0.01 bis 0.03 Gew.-% Zirkon 0.08 bis 0.35 Gew.-% The following content ranges are preferred for the individual alloy elements: magnesium 0.60 to 1.2% by weight manganese 0.8 to 1.6% by weight cobalt 0.3 to 0.6% by weight vanadium 0.01 to 0.03% by weight zircon 0.08 to 0.35% by weight

    Zirkon erhöht die Dehngrenze und erzeugt ein feineres Korn, so dass die geforderten mechanische Eigenschaften, insbesondere die Dehngrenze im Gusszustand, erreicht werden.Zircon increases the proof stress and produces a finer grain, so that the required mechanical properties, in particular the yield strength in the as-cast state, can be achieved.

    Die Klebeneigung des Gussstücks in der Form kann weiter drastisch vermindert und das Ausformverhalten wesentlich verbessert werden, wenn zusätzlich zu Mangan Kobalt und/oder Cer zugegeben wird. Bevorzugt enthält die Legierung daher 0.3 bis 0.6 Gew. °/a Kobalt und/oder 0.05 bis 0.8 Gew.-%, insbesondere 0.1 bis 0.5 Gew.-% Cer.The tendency of the casting to stick in the mold can be drastically reduced and the molding behavior can be significantly improved if additional is added to manganese cobalt and / or cerium. The alloy preferably contains therefore 0.3 to 0.6% by weight of cobalt and / or 0.05 to 0.8% by weight, in particular 0.1 to 0.5% by weight of cerium.

    Die Legierung enthält 0.005 bis 0.15 Gew.-%, insbesondere 0.01 bis 0.03 Gew.-% Vanadium, um die Giessbarkeit bzw. das Fliessvermögen zu verbessern. Versuche haben gezeigt, dass das Formfüllungsvermögen durch eine Vanadiumzugabe wesentlich verbessert wird. Ausserdem verhindert Vanadium die bei AIMg-Legierungen bekannte Verkrätzungsneigung, insbesondere weil der Legierung kein Beryllium zugesetzt wird. Ein Gehalt von max. 0.2 Gew.-% Titan, insbesondere von 0.1 bis 0.18 Gew.-% Titan, bewirkt eine zusätzliche Komfeinung. Der Gehalt an Titan ist auf max. 0.2 Gew.-% beschränkt um die Duktilität der Legierung nicht zu beeinträchtigen. Ein Gehalt von max. 0.5 Gew.-%, bevorzugt 0.1 bis 0.4 Gew.-%, insbesondere 0.2 bis 0.35 Gew.-% Hafnium, steigert die Dehngrenze, ohne die Duktilität zu beeinträchtigen.The alloy contains 0.005 to 0.15% by weight, in particular 0.01 to 0.03 % By weight vanadium in order to improve the pourability or the flowability. Tests have shown that the mold filling capacity can be determined by a Vanadium addition is significantly improved. It also prevents vanadium the tendency to scratch known with AIMg alloys, especially because no beryllium is added to the alloy. A salary of max. 0.2% by weight Titanium, in particular from 0.1 to 0.18% by weight of titanium, causes an additional one Grain refinement. The titanium content is limited to max. 0.2% by weight limited by Ductility of the alloy is not affected. A salary of max. 0.5 % By weight, preferably 0.1 to 0.4% by weight, in particular 0.2 to 0.35% by weight Hafnium, increases the yield strength without affecting ductility.

    Die Aluminiumlegierung eignet sich besonders gut für das Thixocasting bzw. Thixoschmieden.The aluminum alloy is particularly suitable for thixocasting or thixo forging.

    Obwohl die Aluminiumlegierung insbesondere zur Verarbeitung im Druckguss vorgesehen ist, kann sie selbstverständlich auch mit anderen Verfahren vergossen werden, z.B.
       Sandguss
       Schwerkraftkokillenguss
       Niederdruckguss
       Thixocasting/Thixoschmieden
       Squeeze casting    Although the aluminum alloy is intended in particular for processing in die casting, it can of course also be cast using other methods, for example
    sand casting
    gravity die
    Low-pressure casting
    Thixocasting / Thixoforging
    Squeeze casting

    Die grössten Vorteile ergeben sich jedoch bei Giessverfahren, die mit hohen Abkühlungsgeschwindigkeiten ablaufen, wie beispielsweise beim Druckgiessverfahren.However, the greatest advantages result from casting processes that use high Cooling speeds occur, such as in the die casting process.

    Aus der Konstitution der Legierung ist abzulesen, dass, wie oben bereits erwähnt, der Legierungselementgehalt im Vergleich zu herkömmlichen Gusslegierungen relativ niedrig gehalten wird. Dies führt zu einer Unempfindlichkeit für Warmrisse. Während Legierungen mit mehr als 3 Gew.-% Magnesium, die im Bereich fest/flüssig sehr weich sind und die Schrumpfkräfte die Festigkeit übersteigen, aufgrund des breiten Erstarrungsintervalles zu Warmrissen tendieren, trifft das für die vorliegende Legierung nicht zu. Bedingt durch das kleine Schmelzintervall wird dieser Temperaturbereich relativ rasch durchschritten und somit die Warmrissneigung minimiertIt can be seen from the constitution of the alloy that, as already mentioned above, the alloy element content compared to conventional cast alloys is kept relatively low. This leads to insensitivity for hot cracks. While alloys with more than 3 wt .-% magnesium, the are very soft in the solid / liquid area and the shrinking forces are the strength exceed, tend to crack due to the wide solidification interval, this does not apply to the present alloy. Due to the small Melting interval is passed through this temperature range relatively quickly and thus minimizes the tendency to crack

    Weitere Vorteile, Merkmale und Einzelheiten der erfindungsgemässen Aluminium-Gusslegierung sowie deren hervorragende Eigenschaften ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele.Further advantages, features and details of the aluminum casting alloy according to the invention as well as their excellent properties result from the following description of preferred exemplary embodiments.

    BeispieleExamples

    Aus sieben verschiedenen Legierungen wurde auf einer Druckguss-Maschine mit 400 t Schliesskraft je Legierung Töpfe mit einer Wanddicke von 3 mm und den Abmessungen 120 x 120 x 60 mm gegossen. Aus den Seitenteilen wurden Probestäbe für Zugversuche herausgearbeitet und an diesen die mechanischen Eigenschaften im Gusszustand gemessen. Die Ergebnisse sind in der nachstehenden Tabelle zusammengefasst. Hierbei bedeuten Rp0.2 die Dehngrenze, Rm die Zugfestigkeit und A5 die Bruchdehnung. Bei den angegebenen Messwerten handelt es sich um Mittelwerte aus 10 Einzelmessungen. Die Legierungen wurden auf der Basis Hütten-Aluminium der Qualität Al 99.8H erschmolzen.Seven different alloys were used on a die casting machine with 400 t clamping force per alloy pots with a wall thickness of 3 mm and the dimensions 120 x 120 x 60 mm cast. The side parts were Test rods for tensile tests worked out and the mechanical ones Properties measured in the as-cast state. The results are in the summarized below table. Rp0.2 mean the proof stress, Rm the tensile strength and A5 the elongation at break. At the specified Measured values are mean values from 10 individual measurements. The alloys were smelted on the basis of smelting aluminum quality Al 99.8H.

    Die Versuche zeigen, dass mit der erfindungsgemässen Aluminium-Gusslegierung die bezüglich der Dehngrenze und der Bruchdehnung geforderten Minimalwerte im Gusszustand erreicht werden.The tests show that with the aluminum casting alloy according to the invention the minimum values required with regard to the yield strength and elongation at break can be achieved in the as-cast state.

    Die Legierung ist gut schweissbar, zeigt ein ausgezeichnetes Giessverhalten, eine praktisch vemachlässigbare Klebeneigung und lässt sich gut ausformen. Leg. 1 Leg.2 Leg.3 Leg.4 Leg. 5 Leg. 6 Leg.7 Si [Gew.-%] 0.05 0.045 0.036 0.08 0.035 0.045 0.12 Fe [Gew.-%] 0.10 0.38 0.23 0.24 0.23 0.10 0.30 Mn [Gew.-%] 1.40 1.42 1.43 1.19 1.62 1.48 1.35 Mg [Gew.-%] 0.83 0.98 1.00 1.15 1.102 0.89 122 Ce [Gew.-%] - - - - - 0.35 0.15 Co[Gew.-%] 0.35 0.35 0.35 0.35 0.35 0.25 0.24 Hf [Gew.-%] 0.13 - 0.32 - - - - V [Gew.-%] 0.006 0.01 0.02 0.025 0.025 0.025 0.06 Zr [Gew.-%] 0.16 020 0,22 0.21 0.23 0.23 0.25 Rp0.2[N/mm2] 110 115 117 115 125 122 136 Rm [N/mm2] 197 209 208 205 211 205 242 A5 [%] 19 15.5 17.4 16.8 14.1 15.6 19.6 The alloy is easy to weld, shows excellent casting behavior, a practically negligible tendency to stick and can be shaped well. Leg. 1 Leg.2 LEG.3 Leg.4 Leg. 5 Leg. 6 Leg.7 Si [% by weight] 00:05 0045 0036 00:08 0035 0045 00:12 Fe [% by weight] 00:10 00:38 00:23 00:24 00:23 00:10 00:30 Mn [% by weight] 1:40 1:42 1:43 1.19 1.62 1:48 1:35 Mg [% by weight] 0.83 0.98 1:00 1.15 1102 0.89 122 Ce [% by weight] - - - - - 00:35 00:15 Co [wt .-%] 00:35 00:35 00:35 00:35 00:35 00:25 00:24 Hf [% by weight] 00:13 - 00:32 - - - - V [% by weight] 0006 00:01 00:02 0025 0025 0025 00:06 Zr [% by weight] 00:16 020 0.22 00:21 00:23 00:23 00:25 R p0.2 [N / mm 2 ] 110 115 117 115 125 122 136 R m [N / mm 2 ] 197 209 208 205 211 205 242 A 5 [%] 19 15.5 17.4 16.8 14.1 15.6 19.6

    Claims (9)

    1. Use of an aluminium alloy comprising: 0.6 to 1.2 w.% magnesium max. 0.15 w.% silicon 0.5 to 2.0 w.% manganese max. 0.7 w.% iron max. 0.1 w.% copper max. 0.1 w.% zinc max. 0.2 w.% titanium 0.1 to 0.6 w.% cobalt max. 0.8 w.% cerium 0.05 to 0.5 w.% zirconium 0.005 to 0.15 w.% vanadium max. 0.5 w.% hafnium
      and aluminium as the remainder with unavoidable contaminants individually max. 0.05 w.%, total max. 0.2 w.%, for diecasting, thixocasting or thixoforging.
    2. Use according to claim 1, characterised in that the alloy contains 0.8 to 1.6 w.% manganese.
    3. Use according to claim 1 or 2, characterised in that the alloy contains max. 0.3 w.% iron.
    4. Use according to any of claims 1 to 3, characterised in that the alloy contains max. 0.3 to 0.6 w.% cobalt.
    5. Use according to any of claims 1 to 4, characterised in that the alloy contains max. 0.05 to 0.8 w.% in particular 0.1 to 0.5 w.% cerium.
    6. Use according to any of claims 1 to 5, characterised in that the alloy contains 0.08 to 0.35 w.% zirconium.
    7. Use according to any of claims 1 to 6, characterised in that the alloy contains 0.01 to 0.03 w.% vanadium.
    8. Use according to any of claims 1 to 7, characterised in that the alloy contains 0.1 to 0.4 w.%, in particular 0.20 to 0.35 w.% hafnium.
    9. Use according to any of claims 1 to 8, characterised in that the alloy as a diecasting alloy in the casting state has a elongation limit (Rp0.2) of min. 100 MPa and an elongation at break (A5) of min. 14%.
    EP01810014A 2000-01-19 2001-01-08 Aluminium cast alloy Expired - Lifetime EP1118686B1 (en)

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    EP00810040 2000-01-19
    EP00810040A EP1118685A1 (en) 2000-01-19 2000-01-19 Aluminium cast alloy
    EP01810014A EP1118686B1 (en) 2000-01-19 2001-01-08 Aluminium cast alloy

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    CN112626391B (en) * 2021-01-07 2022-05-03 重庆慧鼎华创信息科技有限公司 Low-silicon high-heat-conductivity die-casting aluminum alloy and preparation method thereof
    CN116377289A (en) * 2023-04-10 2023-07-04 帅翼驰新材料集团有限公司 High pressure cast aluminum alloy suitable for brazing

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