EP1645647A1 - Cold age hardenable Al-alloy and process of the manufacture of a cast part - Google Patents

Cold age hardenable Al-alloy and process of the manufacture of a cast part Download PDF

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EP1645647A1
EP1645647A1 EP05019300A EP05019300A EP1645647A1 EP 1645647 A1 EP1645647 A1 EP 1645647A1 EP 05019300 A EP05019300 A EP 05019300A EP 05019300 A EP05019300 A EP 05019300A EP 1645647 A1 EP1645647 A1 EP 1645647A1
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weight
alloy
max
casting
cast aluminum
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EP1645647B2 (en
EP1645647B8 (en
EP1645647B1 (en
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Jana Dipl.-Ing. Borchmann
Ursula Dipl.-Ing. Carlson
Ina Dipl.-Ing. Diederichs-Mittler
Andreas Dr. Ing. Kleine
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Trimet Aluminium SE
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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
    • C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C22C21/04—Modified aluminium-silicon alloys
    • 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

Definitions

  • the invention relates to a cold-hardening cast aluminum alloy, which was melted on the basis of metallurgical aluminum Al 99.9 and at high tensile strength and yield strength still has an elongation of well over 1%, and a method for producing an aluminum casting.
  • the alloy 226A (VDS list) is known as a standardized casting alloy of the type G-AlSi8Cu3.
  • the chemical composition of this alloy is given in weight percent (Gw%) as follows: silicon 7.5-9.5 Gw%, iron max 0.8 Gw%, copper 2-3.5 Gw%, manganese 0.15-0 , 65% by weight, magnesium 0.05-0.55% by weight, nickel max 0.35% by weight, zinc max 1.2% by weight, titanium max 0.25% by weight, lead max 0.25% by weight, chromium max 0.15% by weight, balance aluminum and other admixtures 0.05% (individually) and 0.25% by weight (total).
  • a cold-hardening cast aluminum alloy and a process for producing a cast aluminum part with high tensile strength and yield strength with simultaneously improved ductility should be specified.
  • the alloy should be easy to cast and suitable for the production of thermally highly stressable castings.
  • the castings should also be well weldable by conventional means.
  • the inventive method for producing a cold-curing aluminum casting is preferably in the melting of the alloy Silicon 6 -11% by weight Copper 2.0 - 4.0% by weight Manganese 0.65 - 1.0% by weight Zinc 0,5 - 3,5 Gw% Strontium 0.01 - 0.04 Gw% Magnesium max 0.55 Gw% Iron max 0.2 Gw% Titanium max 0.2 Gw%. based on primary metal / metallurgical metal of purity Al 99.9 with the addition of at least one of the following elements silver, samarium, nickel, cadmium, beryllium and a cold aging of 7 - 9 days immediately following the casting process.
  • microstructures were compared. It was found that only small contents of Mg 2 Si phases were formed in the alloy according to the invention, but a very pronounced thermally stable Al-Sc-Zr curing phase was present. The recrystallization temperature was likewise markedly increased in the case of the alloy according to the invention. Furthermore, the number of beta-Al-Fe-Si needles was reduced by about 80%, which suggests a significantly improved ductility of the alloy according to the invention.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Laminated Bodies (AREA)
  • Continuous Casting (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Conductive Materials (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Forging (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

Cold hardening Al alloy based on primary metal/foundry Al of purity 99.9% or melted (sic) to give a primary alloy of higher purity, higher tensile strength and extension limit with an elongation greater than 1% contains (wt.%):Si (6-11), Cu (2.0-4.0), Mn (0.65-1.0), Zn (0.5-3.5), Sr (0.01-0.03), Mn 0.55 maximum, and Fe and Ti each 0.2 maximum. An independent claim is included for a method of preparing an Al casting part from the above composition.

Description

Die Erfindung betrifft eine kaltaushärtende Aluminiumgusslegierung, die auf Basis von Hüttenaluminium Al 99,9 erschmolzen wurde und bei hoher Zugfestigkeit und Streckgrenze noch eine Dehnung von deutlich über 1 % aufweist, sowie ein Verfahren zur Herstellung eines Aluminiumgussteils.The invention relates to a cold-hardening cast aluminum alloy, which was melted on the basis of metallurgical aluminum Al 99.9 and at high tensile strength and yield strength still has an elongation of well over 1%, and a method for producing an aluminum casting.

Stand der TechnikState of the art

Aus dem Werkstoff-Datenblatt ENAC-46200 ist als genormte Gusslegierung vom Typ G-AlSi8Cu3 die Legierung 226A (VDS Liste) bekannt. Die chemische Zusammensetzung dieser Legierung wird in Gewichtsprozent (Gw%) wie folgt angegeben: Silicium 7,5 - 9,5 Gw%, Eisen max 0,8 Gw%, Kupfer 2 - 3,5 Gw%, Mangan 0,15 - 0,65 Gw%, Magnesium 0,05 - 0,55 Gw%, Nickel max 0,35 Gw%, Zink max 1,2 Gw%, Titan max 0,25 Gw%, Blei max 0,25 Gw%, Chrom max 0,15 Gw%, Rest Aluminium sowie andere Beimengungen 0,05% (einzeln) und 0,25Gw% (insgesamt).From the material data sheet ENAC-46200 the alloy 226A (VDS list) is known as a standardized casting alloy of the type G-AlSi8Cu3. The chemical composition of this alloy is given in weight percent (Gw%) as follows: silicon 7.5-9.5 Gw%, iron max 0.8 Gw%, copper 2-3.5 Gw%, manganese 0.15-0 , 65% by weight, magnesium 0.05-0.55% by weight, nickel max 0.35% by weight, zinc max 1.2% by weight, titanium max 0.25% by weight, lead max 0.25% by weight, chromium max 0.15% by weight, balance aluminum and other admixtures 0.05% (individually) and 0.25% by weight (total).

Aufgabenstellung Task

Ausgehend von dieser Legierung soll eine kaltaushärtende Aluminiumgusslegierung sowie ein Verfahren zur Herstellung eines Aluminiumgußteils mit hoher Zugfestigkeit und Streckgrenze bei gleichzeitig verbesserter Duktilität angegeben werden. Die Legierung soll gut vergießbar und zur Herstellung thermisch hoch beanspruchbarer Gussteile geeignet sein. Die Gussteile sollen auch mit herkömmlichen Mitteln gut schweißbar sein.Based on this alloy, a cold-hardening cast aluminum alloy and a process for producing a cast aluminum part with high tensile strength and yield strength with simultaneously improved ductility should be specified. The alloy should be easy to cast and suitable for the production of thermally highly stressable castings. The castings should also be well weldable by conventional means.

Zur Lösung des ersten Teils dieser Aufgabe wird eine neue AlSi9Cu3 mit zusätzlichen Gehalten an Mangan, Zink, Strontium und Obergrenzen für Magnesium, Eisen und Titan gemäß kennzeichnendem Teil von Patentanspruch 1 angegeben. Das neue Verfahren ist durch die im Patentanspruch 8 definierten Maßnahmen gekennzeichnet.To solve the first part of this problem, a new AlSi9Cu3 with additional levels of manganese, zinc, strontium and upper limits for magnesium, iron and titanium according to the characterizing part of claim 1 is given. The new method is characterized by the measures defined in claim 8.

Das erfindungsgemäße Verfahren zur Herstellung eines kaltaushärtenden Aluminiumgussteils besteht bevorzugt in dem Erschmelzen der Legierung
Silicium 6 -11 Gw%
Kupfer 2,0 - 4,0 Gw%
Mangan 0,65 - 1,0 Gw%
Zink 0,5 - 3,5 Gw%
Strontium 0,01 - 0,04 Gw%
Magnesium max 0,55 Gw%
Eisen max 0,2 Gw%
Titan max 0,2 Gw% .
auf Basis von Primärmetall/Hüttenmetall der Reinheit Al 99,9 unter Zugabe mindestens eines der folgenden Elemente Silber, Samarium, Nickel, Cadmium, Beryllium sowie einer dem Gießprozess unmittelbar nachfolgenden Kaltauslagerung von 7 - 9 Tagen.The inventive method for producing a cold-curing aluminum casting is preferably in the melting of the alloy
Silicon 6 -11% by weight
Copper 2.0 - 4.0% by weight
Manganese 0.65 - 1.0% by weight
Zinc 0,5 - 3,5 Gw%
Strontium 0.01 - 0.04 Gw%
Magnesium max 0.55 Gw%
Iron max 0.2 Gw%
Titanium max 0.2 Gw%.
based on primary metal / metallurgical metal of purity Al 99.9 with the addition of at least one of the following elements silver, samarium, nickel, cadmium, beryllium and a cold aging of 7 - 9 days immediately following the casting process.

BeispieleExamples

Im folgenden wird die Erfindung anhand mehrerer Ausführungsbeispiele näher erläutert. Dabei wurden die Werte von Zugfestigkeit, Dehngrenze und Dehnung an einem im Schwerkraftkokillenguss gegossenen Probestab gemessen, der auf folgende Abmessungen abgedreht wurde: Probendicke a= 3mm, Probenbreite b= 8mm, Kopfbreite B= 12mm, Kopfhöhe h= 15mm, Anfangslänge L0= 30mm, Versuchslänge Lc= 33mm und Gesamtlänge Lt= 80mm.In the following the invention will be explained in more detail with reference to several embodiments. The values of tensile strength, yield strength and elongation were measured on a sample cast in the gravity die casting, which was turned to the following dimensions: sample thickness a = 3mm, sample width b = 8mm, head width B = 12mm, head height h = 15mm, initial length L0 = 30mm, Trial length Lc = 33mm and total length Lt = 80mm.

1. Beispiel (Erfindungsbeispiel)1st example (invention example)

Eine Gusslegierung wird in Übereinstimmung mit Patentanspruch 8 als Primärlegierung auf der Basis von Hüttenaluminium Al 99,9 mit folgender Zusammensetzung erschmolzen: Silizium 9%, Kupfer 2,7%, Mangan 1%, Zink 2%, Strontium 0,02%, Magnesium 0,5%, Eisen 0,1%, Titan 0,1%, Silber 0,1 %, Nickel 0,45%, Indium 0,1%, Beryllium 0,0005%, Rest-Aluminium und herstellungsbedingte Verunreinigungen. Nach einer Kaltauslagerung von 8 Tagen wurden an dieser Legierung im Gusszustand folgende Werte gemessen:

  • Streckgrenze Rp0,2 = 190MPa
  • Zugfestigkeit Rm = 270MPa
  • Dehnung A50mm = 1,5%
A casting alloy is melted in accordance with claim 8 as a primary alloy based on metallurgical Al 99.9 having the following composition: silicon 9%, copper 2.7%, manganese 1%, zinc 2%, strontium 0.02%, magnesium 0 , 5%, iron 0.1%, titanium 0.1%, silver 0.1%, nickel 0.45%, indium 0.1%, beryllium 0.0005%, residual aluminum and production-related impurities. After a cold aging of 8 days, the following values were measured on this alloy in the cast state:
  • Yield strength R p0.2 = 190 MPa
  • Tensile strength Rm = 270 MPa
  • Elongation A 50mm = 1.5%

2. Beispiel nach dem Stand der Technik2nd example according to the prior art

Als Vergleichslegierung wird eine 226A-Gusslegierung mit folgender Zusammensetzung verwendet:

  • Si 8%, Fe 0,6%, Cu 3,0%, Mn 0,3%, Ni 0,2%, Zn 1,0%, Ti 0,2%, Pb 0,1%, Sn 0,1%, Mg 0,45 andere Beimengungen: einzeln 0,05, insgesamt 0,25%, Rest Aluminium.
The reference alloy used is a 226A casting alloy having the following composition:
  • Si 8%, Fe 0.6%, Cu 3.0%, Mn 0.3%, Ni 0.2%, Zn 1.0%, Ti 0.2%, Pb 0.1%, Sn 0.1 %, Mg 0.45 other admixtures: individually 0.05, total 0.25%, balance aluminum.

Die Gusslegierung G-AlSi8Cu3 (Werkstoff Nr. 3.2162.05) weist im Gusszustand folgende Werkstoffeigenschaften auf:

  • Streckgrenze Rp0,2 = 100 MPa
  • Zugfestigkeit Rm = 170 MPa
  • Dehnung A50mm = 1%
Cast alloy G-AlSi8Cu3 (material no. 3.2162.05) has the following material properties when cast:
  • Yield strength R p0.2 = 100 MPa
  • Tensile strength R m = 170 MPa
  • Elongation A 50mm = 1%

Vergleich der VerarbeitungseigenschaftenComparison of processing properties

Der Vergleich zwischen der Legierung 226A nach dem Stand der Technik und der erfindungsgemäßen Legierung gemäß Beispiel 1 zeigt die überlegenen Eigenschaften der erfindungsgemäßen Legierung, da die Werte für
Streckgrenze Rp0,2 = 190MPa
Zugfestigkeit Rm = 270Mpa bei gleichzeitig hoher
Dehnung A50mm= 1,5% gemessen wurden.The comparison between the prior art alloy 226A and the inventive alloy according to Example 1 shows the superior properties of the alloy according to the invention, since the values for
Yield strength R p0.2 = 190 MPa
Tensile strength Rm = 270Mpa at the same time high
Elongation A 50mm = 1.5% were measured.

Außerdem wurden die Gefügestrukturen verglichen. Dabei zeigte sich, dass bei der erfindungsgemäßen Legierung nur geringe Gehalte an Mg2Si-Phasen gebildet wurden, jedoch eine sehr ausgeprägte thermisch stabile Al-Sc-Zr-Aushärtungsphase vorhanden war. Die Rekristallisationstemperatur war bei der erfindungsgemäßen Legierung ebenfalls deutlich erhöht. Ferner war die Anzahl der Beta-Al-Fe-Si-Nadeln um ca. 80% verringert, was auf eine deutlich verbesserte Duktilität der erfindungsgemäßen Legierung schließen lässt.In addition, the microstructures were compared. It was found that only small contents of Mg 2 Si phases were formed in the alloy according to the invention, but a very pronounced thermally stable Al-Sc-Zr curing phase was present. The recrystallization temperature was likewise markedly increased in the case of the alloy according to the invention. Furthermore, the number of beta-Al-Fe-Si needles was reduced by about 80%, which suggests a significantly improved ductility of the alloy according to the invention.

Weitere Versuche zur Interpretation der GehaltsgrenzenFurther attempts to interpret the salary limits

Durch Variation der im Beispiel Nr. 1 angegebenen Gusslegierung hinsichtlich der Legierungsgrenzen wurden folgende Ergebnisse festgehalten:

1.
Magnesium: bei Gehalten von über 0,55 % wird während des Vergießens der erfindungsgemäß zusammengesetzte Basislegierung die Oxidationsneigung gefördert. Außerdem konnte bei derartig hohen Mg-Gehalten keine weitere Festigkeitssteigerung festgestellt werden, da sich Mg 2Si-Phasen bildeten.
2.
Eisen: bei Gehalten über 0,2 % wird bei allen nach Anspruch 8 vergossenen Legierungen die Dehnung deutlich herabgesetzt.
3.
Titan: Oberhalb von 0,2 % wurde keine Verbesserung des Gefüges eines nach Anspruch 1 ausgebildeten Gussteils im Hinblick auf die Rekristallisationstemperatur festgestellt.
4.
Indium und Cadmium verkürzen die Kaltauslagerungszeit der erfindungsgemäßen Legierung.
5.
Beryllium vermindert bei Magnesiumgehalten von über 0,4 bis 0,55 Gw% die Oxidationsneigung, die wiederum einen ungünstigen Einfluss auf die Dehnung hat.
6.
Cer erhöht in Aluminiumgusslegierungen der Zusammensetzung nach Anspruch 1 - 4 die Fließfähigkeit und mindert bis zu Gehalten von 0,4% die Klebneigung.
7.
Scandium erhöht die Warmfestigkeit und bildet in Verbindung mit Zirkon eine thermisch stabile Al-Sc-Zr -Aushärtungsphase.
8.
Zirkon erhöht bei der erfindungsgemäßen Gusslegierung bis zu einem Gehalt von max 0,3 % die Rekristallisationstemperatur.
9.
Zink verbessert bis zu einem Gehalt von 3,5 % bei einer nach Anspruch 1 zusammengesetzten Legierung die Formstabilität des Gussteils, bei Gehalten von mehr als 3,5% wurde keine weitere Steigerung der Formstabilität bzw. eine Verringerung der Klebeneigung festgestellt.
The following results were recorded by varying the casting alloy given in Example No. 1 with regard to the alloying limits:
1.
Magnesium: at levels of more than 0.55%, the tendency to oxidation is promoted during the casting of the base alloy according to the invention. In addition, at such high Mg contents, no further increase in strength could be observed, since Mg 2 Si phases formed.
Second
Iron: at levels above 0.2%, the elongation is significantly reduced in all alloys cast according to claim 8.
Third
Titanium: Above 0.2%, no improvement in the texture of a casting formed according to claim 1 was found in terms of the recrystallization temperature.
4th
Indium and cadmium shorten the cold aging time of the alloy according to the invention.
5th
Beryllium reduces the tendency to oxidation at magnesium contents of more than 0.4 to 0.55% by weight, which in turn has an unfavorable influence on the elongation.
6th
Cerium increases flowability in cast aluminum alloys of the composition according to claims 1-4 and reduces stickiness up to levels of 0.4%.
7th
Scandium increases the heat resistance and, in combination with zirconium, forms a thermally stable Al-Sc-Zr hardening phase.
8th.
Zirconium increases the recrystallization temperature in the cast alloy according to the invention up to a content of max. 0.3%.
9th
Zinc improves the dimensional stability of the casting up to a content of 3.5% in an alloy composed according to claim 1; at levels of more than 3.5%, no further increase in the dimensional stability or a reduction in the tendency to adhere was found.

Somit lässt sich die technische Überlegenheit der ausgewählten Parameter für die erfindungsgemäße Aluminiumgusslegierung als Ergebnis einer synergistischen Wirkung der jeweils beteiligten Legierungselemente begründen.Thus, the technical superiority of the selected parameters for the aluminum casting alloy according to the invention can be justified as the result of a synergistic effect of the respective alloying elements involved.

Claims (10)

Kaltaushärtende Aluminiumgusslegierung, die auf Basis von Primärmetall/Hüttenaluminium der Reinheit Al 99,9 oder einer höheren Reinheitsstufe als Primärlegierung erschmolzen wurde und bei hoher Zugfestigkeit und Streckgrenze noch eine Dehnung von über 1 % aufweist, gekennzeichnet durch folgende Legierungsgehalte in Gewichts(Gw)%: Silicium 6 -11 Gw% Kupfer 2,0 - 4,0 Gw% Mangan 0,65 - 1,0 Gw% Zink 0,5 - 3,5 Gw% Strontium 0,01 - 0,03 Gw% Magnesium max 0,55 Gw% Eisen max 0,2 Gw% Titan max 0,2 Gw%. Cold-hardening cast aluminum alloy, which has been melted on the basis of primary metal / metallurgical aluminum of purity Al 99.9 or a higher purity grade as primary alloy and still exhibits an elongation of more than 1% at high tensile strength and yield strength, characterized by the following alloy contents in weight (W)%: Silicon 6 -11% by weight Copper 2.0 - 4.0% by weight Manganese 0.65 - 1.0% by weight Zinc 0,5 - 3,5 Gw% Strontium 0.01 - 0.03% by weight Magnesium max 0.55 Gw% Iron max 0.2 Gw% Titanium max 0.2 Gw%. Aluminiumgusslegierung nach Anspruch 1, dadurch gekennzeichnet, dass zur Verbesserung der Dehnung auf Werte von über 1,5% bei gleichzeitig hohen Werten an Zugfestigkeit Rm ≥ 230MPa und Streckgrenze Rp02 ≥ 170MPa folgende Elemente einzeln oder in Kombination in die Aluminiumgusslegierung zugesetzt werden: - Silber 0,01 - 0,80 Gw% - Samarium 0,01 - 1,0 Gw% - Nickel 0,01 - 0,40 Gw% . Cast aluminum alloy according to claim 1, characterized in that to improve the elongation to values of more than 1.5% with simultaneously high values of tensile strength R m ≥ 230MPa and yield strength R p02 ≥ 170MPa the following elements are added individually or in combination in the aluminum casting alloy: - Silver 0.01 - 0.80 Gw% - Samarium 0.01 - 1.0 Gw% - Nickel 0.01-0.40 Gw%. Aluminiumgusslegierung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass durch Zugabe von Zirkon die Rekristallisationstemperatur erhöht wird.Cast aluminum alloy according to claim 1 or 2, characterized in that the recrystallization temperature is increased by adding zirconium. Aluminiumgusslegierung nach Anspruch 1 - 3, dadurch gekennzeichnet, dass durch Zugabe von Scandium eine thermische stabile Al-Sc-Zr-Phase gebildet wird.Cast aluminum alloy according to claim 1-3, characterized in that a thermal stable Al-Sc-Zr phase is formed by the addition of scandium. Aluminiumgusslegierung nach Anspruch 1 - 4, dadurch gekennzeichnet, dass durch Zugabe von Cer die Fließfähigkeit erhöht und die Klebneigung verringert wird.Cast aluminum alloy according to claim 1 - 4, characterized in that the addition of cerium increases the flowability and the tendency to stick is reduced. Aluminiumgusslegierung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass zur Verkürzung der Kaltauslagerungszeit folgende Legierungselemente einzeln oder zusammen in der Al-Gußlegierung enthalten sind: Cadmium 0,01 - 0,30 Gw% Indium 0,01 - 0,20 Gw%. Cast aluminum alloy according to one of claims 1 to 5, characterized in that, in order to shorten the cold aging time, the following alloying elements are contained individually or together in the Al casting alloy: Cadmium 0.01 - 0.30 Gw% Indium 0.01-0.20% by weight. Aluminiumgusslegierung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zur Verminderung der Oxidation bei erhöhten Magnesiumgehalten in der Al-Gusslegierung zusätzlich Beryllium bis zu 0,001 Gw% enthalten ist.Cast aluminum alloy according to one of the preceding claims, characterized in that in order to reduce the oxidation at elevated magnesium levels in the Al casting alloy additionally beryllium is up to 0.001% by weight. Verfahren zur Herstellung eines kaltaushärtenden Aluminium-Gussteils, das bei hoher Zugfestigkeit und Streckgrenze eine Dehnung von deutlich über 1 % aufweist, dadurch gekennzeichnet, dass eine AlSiCu-Gußlegierung auf der Basis von Primärmetall/Hüttenmetall der Reinheit Al 99,9 oder reiner erschmolzen wird enthaltend folgende Legierungselemente in Gewichts-(Gw)- %: Silizium 6 -11 Gw% Kupfer 2,0 - 4,0 Gw% Mangan 0,65 - 1,0 Gw% Zink 0,5 - 3,5 Gw% Strontium 0,01 - 0,04 Gw% Magnesium max 0,55 Gw% Eisen max 0,2 Gw% Titan max 0,2 Gw% wahlweise mindestens eines der Elemente Silber 0,01-0,08, Samarium 0,01-1,0 , Nickel 0,01-0,40 , Cadmium 0,01-0,30 , Indium 0,01-0,20 und Beryllium bis zu 0,001 Gw.% , wobei sich dem Gießvorgang unmittelbar nachfolgend eine Kaltauslagerung von 7 - 9 Tagen anschließt.Process for the preparation of a cold-hardening aluminum casting, which has an elongation of well over 1% at high tensile strength and yield strength, characterized in that an AlSiCu casting alloy based on primary metal / metal halide of purity Al 99.9 or pure is melted following alloying elements in weight (Gw) -%: Silicon 6 -11% Copper 2.0 - 4.0% by weight Manganese 0.65 - 1.0% by weight Zinc 0,5 - 3,5 Gw% Strontium 0.01 - 0.04 Gw% Magnesium max 0.55 Gw% Iron max 0.2 Gw% Titanium max 0.2 Gw% optionally at least one of silver 0.01-0.08, samarium 0.01-1.0, nickel 0.01-0.40, cadmium 0.01-0.30, indium 0.01-0.20 and Beryllium up to 0.001% by weight, with the casting immediately followed by a cold aging of 7-9 days. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass der AlSiCu-Gusslegierung weitere Elemente aus der Gruppe Zirkon, Scandium oder Cer zugesetzt werden, wobei als herstellungsbedingte Verunreinigungen bis zu 0,05 Gw% (einzeln) und insgesamt max 0,2 Gw% im Rest Aluminium vorliegen.A method according to claim 8, characterized in that the AlSiCu casting alloy further elements from the group zirconium, scandium or cerium are added, wherein as production-related impurities up to 0.05 Gw% (individually) and a total of max 0.2 Gw% in the rest Aluminum present. Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass zur Verbesserung der Festigkeitswerte bei gleichbleibend hoher Dehnung von über 1,5% nach der Kaltauslagerung eine Warmauslagerung bei 160 bis 240°C durchgeführt wird.A method according to claim 8 or 9, characterized in that to improve the strength values at a consistently high elongation of more than 1.5% after the cold aging, a thermal aging at 160 to 240 ° C is performed.
EP05019300.2A 2004-10-08 2005-09-06 Cold age hardenable Al-alloy and process of the manufacture of a cast part Active EP1645647B8 (en)

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US11471984B2 (en) 2018-06-28 2022-10-18 Scandium International Mining Corporation Control of recrystallization in cold-rolled AlMn(Mg)ScZr sheets for brazing applications
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US8574382B2 (en) 2007-05-24 2013-11-05 Aluminium Rheinfelden Gmbh Heat-resistant aluminium alloy
WO2011098213A3 (en) * 2010-02-11 2011-12-08 Trimet Aluminium Ag Method and device for producing motor vehicle chassis parts
US9446447B2 (en) 2010-02-11 2016-09-20 Ksm Castings Group Gmbh Method and device for producing motor vehicle chassis parts
US10041161B2 (en) 2010-02-11 2018-08-07 Trimet Aluminium Se Method and device for producing motor vehicle chassis parts
US11471984B2 (en) 2018-06-28 2022-10-18 Scandium International Mining Corporation Control of recrystallization in cold-rolled AlMn(Mg)ScZr sheets for brazing applications
CN108866460A (en) * 2018-07-20 2018-11-23 合肥工业大学 A kind of aging technique of Al-Si-Mg-Zr-Ti-Sc alloy
CN117646138A (en) * 2024-01-30 2024-03-05 鸿劲新材料研究(南通)有限公司 Explosion-proof aluminum alloy material and preparation method thereof

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EP1645647B2 (en) 2013-06-12
EP1645647B8 (en) 2013-07-24
ATE380260T1 (en) 2007-12-15
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EP1645647B1 (en) 2007-12-05

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