EP0104139B1 - Aluminium alloy - Google Patents

Aluminium alloy Download PDF

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Publication number
EP0104139B1
EP0104139B1 EP83810377A EP83810377A EP0104139B1 EP 0104139 B1 EP0104139 B1 EP 0104139B1 EP 83810377 A EP83810377 A EP 83810377A EP 83810377 A EP83810377 A EP 83810377A EP 0104139 B1 EP0104139 B1 EP 0104139B1
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EP
European Patent Office
Prior art keywords
content
iron
aluminium alloy
aimgsi
alloys
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83810377A
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German (de)
French (fr)
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EP0104139A1 (en
Inventor
Pius Schwellinger
Alois Ried
Jürgen Timm
Manfred Heckler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcan Holdings Switzerland AG
Original Assignee
Schweizerische Aluminium AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schweizerische Aluminium AG filed Critical Schweizerische Aluminium AG
Priority to AT83810377T priority Critical patent/ATE20607T1/en
Publication of EP0104139A1 publication Critical patent/EP0104139A1/en
Application granted granted Critical
Publication of EP0104139B1 publication Critical patent/EP0104139B1/en
Expired legal-status Critical Current

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Classifications

    • 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 aluminum alloys of the genus AIMgSi.
  • Such hardenable alloys are used in most of the manufacturing processes customary for aluminum alloys, for example for extrusion, rolling and hot pressing products. Such products can then be subjected to a heat aging treatment to achieve high strength.
  • the silicon and magnesium contents are selected and, if necessary, further alloying elements, for example up to 1% manganese, up to 1% copper or up to 0.35% chromium, are added.
  • Vanadium additives are also known to reduce the quenching sensitivity of extruded products.
  • An aluminum alloy is known from FR-A-2 078 965 with 0.4 to 1.0% Mg, 0.4 to 0.9% Si, 0.03 to 0.4% Cr, 0.03 to 0.2% Zr, up to 0.50% Zn, up to 0.30% Cu, up to 0.15 % Fe, up to 0.15% V, up to 0.10% Ti, 0.03-0.4 Mn and up to 0.008% B.
  • this object is achieved by an aluminum alloy which consists of 0.3 to 1.0% magnesium, 0.3 to 1.2% silicon, 0.1 to 0.5% iron, 0.05 to 0.20% vanadium, to 0.4% copper, a manganese content that is 1/4 to 2 / 3 of the iron content, and optionally a cobalt content that is 1/4 to 1/2 of the iron content, the rest is aluminum and impurities.
  • the fine-grained recrystallized state which is mainly due to the vanadium content, increases the cold formability of rolled and pressed products. Furthermore, it contributes to more uniform material properties and increases the strength level compared to coarse-grained recrystallized structure. In addition, the pressability is promoted in all its aspects.
  • Manganese which is in a range from 1/4 to 2/3 of the iron content, forms ternary phases together with aluminum, silicon and iron, which, thanks to their dimensions and distribution, significantly increase toughness. A manganese / iron ratio between 1/3 and 1/2 has proven to be particularly favorable.
  • Iron contents below 0.25% are particularly suitable to prevent edge cracking and the occurrence of press fleas during extrusion.
  • cobalt is added in a proportion by weight of 1/4 to 1/2 that of iron.
  • the ternary phases formed from Al, Co, Fe and Mn prevent embrittlement by means of their shape and arrangement. This also improves the pressability. However, if the manganese or cobalt content is above the specified limits, the pressability is reduced again.
  • the Cu content which contributes to the increase in strength without significantly increasing the required hot-forming force, should not exceed 0.25% if susceptibility to corrosion is to be specifically avoided.
  • Alloys 1 to 3 were processed into extruded products.
  • the alloys (E) according to the invention differ from the conventional ones (H) in particular in the better bendability of the thermally hardened profiles.
  • Alloys 4 were processed into hot pressed parts (forged).
  • the thermoformability of 4 U was significantly better than that of 4 H. While the hot-hardened forgings made of 4 H had considerable coarse grain and thus, in addition to the uneven and in places deep strengths, could not be decoratively anodized, the workpiece made of 4 E was characterized by very fine grain .
  • Alloys 5 were processed into sheet metal and deformed before heat hardening.
  • the sheet 5 E showed both in the deep drawing ability, as well in the toughness better values.

Abstract

0.05 to 0.2% vanadium and manganese in a concentration equal to 1/4 to 2/3 of the iron concentration are added to an aluminum wrought alloy containing 0.3-1.0% Mg, 0.3-1.2% Si, 0.1-0.5% Fe and up to 0.4% Cu. This alloy is employed mainly for the manufacture of extruded products.

Description

Die Erfindung betrifft Aluminiumlegierungen der Gattung AIMgSi. Solche aushärtbaren Legierungen werden bei den meisten, bei Aluminiumlegierungen üblichen Herstellungsverfahren eingesetzt, beispielsweise für Strangpress-, Walz- und Warmpress-Produkte. Solche Produkte können dann zur Erreichung hoher Festigkeiten einer Warmauslagerungsbehandlung unterzogen werden. Je nach gewünschter Festigkeit des Produkts werden die Silizium- und Magnesiumgehalte gewählt und gegebenenfalls noch weitere Legierungselemente, beispielsweise bis zu 1 % Mangan, bis zu 1 % Kupfer oder bis zu 0.35 % Chrom zugesetzt. Speziell zur Verringerung der Abschreckempfindlichkeit von Strangpressprodukten sind auch Vanadiumzusätze bekannt. Aus der FR-A-2 078 965 ist eine Aluminiumlegierung bekannt mit 0.4 bis 1.0 % Mg, 0.4 bis 0.9 % Si, 0.03 bis 0.4 % Cr, 0.03 bis 0.2 % Zr, bis 0.50 % Zn, bis 0.30 % Cu, bis 0.15 % Fe, bis 0.15 % V, bis 0.10 % Ti, 0,03-0,4 Mn und bis 0.008 % B.The invention relates to aluminum alloys of the genus AIMgSi. Such hardenable alloys are used in most of the manufacturing processes customary for aluminum alloys, for example for extrusion, rolling and hot pressing products. Such products can then be subjected to a heat aging treatment to achieve high strength. Depending on the desired strength of the product, the silicon and magnesium contents are selected and, if necessary, further alloying elements, for example up to 1% manganese, up to 1% copper or up to 0.35% chromium, are added. Vanadium additives are also known to reduce the quenching sensitivity of extruded products. An aluminum alloy is known from FR-A-2 078 965 with 0.4 to 1.0% Mg, 0.4 to 0.9% Si, 0.03 to 0.4% Cr, 0.03 to 0.2% Zr, up to 0.50% Zn, up to 0.30% Cu, up to 0.15 % Fe, up to 0.15% V, up to 0.10% Ti, 0.03-0.4 Mn and up to 0.008% B.

All diese Massnahmen zur Erreichung einer gewissen Festigkeit gehen jedoch auf Kosten einer oder mehrerer anderen wünschbaren Eigenschaften, wie Zähigkeit, Biegbarkeit, Widerstandsfähigkeit gegen Korrosion und, speziell bei Strangpressprodukten, gleichmässige Oberfläche, Abwesenheit von Pressflöhen, gute Längspreßschweissnähte, Möglichkeit zum Verpressen komplizierterer Profile sowie Einsatz wirtschaftlicher Pressgeschwindigkeiten.However, all these measures to achieve a certain strength come at the cost of one or more other desirable properties, such as toughness, flexibility, resistance to corrosion and, especially in the case of extruded products, a uniform surface, absence of press flutes, good longitudinal weld seams, the possibility of pressing more complicated profiles and use economical press speeds.

In Kenntnis dieser Schwierigkeiten bei der Wahl einer in aller Hinsicht befriedigenden Legierung hat sich der Erfinder die Aufgabe gestellt, für den Bereich der aushärtbaren AIMgSi-Legierungen solche Legierungszusätze zu finden, welche für alle Festigkeitsstufen und unter Anwendung der üblichen Fertigungswege Produkte ermöglichen, welche den vielseitigen Anforderungen genügen.Knowing these difficulties in the selection of an alloy that is satisfactory in all respects, the inventor has set himself the task of finding alloy additives for the area of hardenable AIMgSi alloys which enable products for all strength levels and using the usual production methods, which allow the versatile Requirements met.

Erfindungsgemäss wird diese Aufgabe durch eine Aluminiumlegierung gelöst, welche aus 0.3 bis 1.0 % Magnesium, 0.3 bis 1.2 % Silizium, 0.1 bis 0.5 % Eisen, 0.05 bis 0.20 % Vanadium, bis 0.4 % Kupfer, einem Mangangehalt, der 1/4 bis 2/3 des Eisengehalts beträgt, sowie wahlweise einen Kobaltgehalt, der 1/4 bis 1/2 des Eisengehalts beträgt, Rest Aluminium und Verunreinigungen besteht.According to the invention, this object is achieved by an aluminum alloy which consists of 0.3 to 1.0% magnesium, 0.3 to 1.2% silicon, 0.1 to 0.5% iron, 0.05 to 0.20% vanadium, to 0.4% copper, a manganese content that is 1/4 to 2 / 3 of the iron content, and optionally a cobalt content that is 1/4 to 1/2 of the iron content, the rest is aluminum and impurities.

Diese Zusätze führen dazu, dass diese Legierungen nach einer Warmumformung oder einer Lösungsglühung feinkörnig rekristallisiert vorliegen und die eisenhaltigen Teilchen günstiger verteilt sind. Diese beiden Eigenschaften bewirken eine Vielzahl vorzüglicher Verhaltensweisen der erfindungsgemässen Werkstoffe.These additives mean that these alloys are recrystallized in fine-grained form after hot working or solution annealing and that the iron-containing particles are more favorably distributed. These two properties result in a large number of excellent behaviors of the materials according to the invention.

Der vorallem durch den Vanadiumgehalt begründete feinkörnig rekristallisierte Zustand erhöht die Kaltverfombarkeit von Walz- und Pressprodukten. Im weiteren trägt er zu gleichmässigeren Werkstoffeigenschaften bei und erhöht das Festigkeitsniveau im Vergleich zu grobkörnig rekristallisiertem Gefüge. Zudem wird die Pressbarkeit in all ihren Aspekten gefördert. Mangan, das in einem Bereich von 1/4 bis zu 2/3 des Eisengehaltes vorliegt, bildet zusammen mit Aluminium, Silizium und Eisen ternäre Phasen, welche dank ihrer Abmessungen und Verteilung die Zähigkeit wesentlich erhöhen. Ein Mangan/ Eisen-Verhältnis zwischen 1/3 und 1/2 hat sich als besonders günstig erwiesen.The fine-grained recrystallized state, which is mainly due to the vanadium content, increases the cold formability of rolled and pressed products. Furthermore, it contributes to more uniform material properties and increases the strength level compared to coarse-grained recrystallized structure. In addition, the pressability is promoted in all its aspects. Manganese, which is in a range from 1/4 to 2/3 of the iron content, forms ternary phases together with aluminum, silicon and iron, which, thanks to their dimensions and distribution, significantly increase toughness. A manganese / iron ratio between 1/3 and 1/2 has proven to be particularly favorable.

Um beim Strangpressen die Kantenrissanfälligkeit und das Auftreten von Pressflöhen zu verhindern, sind Eisengehalte unterhalb 0.25 % besonders geeignet.Iron contents below 0.25% are particularly suitable to prevent edge cracking and the occurrence of press fleas during extrusion.

Soll eine speziell hohe Duktilität erzeugt werden, wird Kobalt in einem Gewichtsanteil von 1/4 bis 1/2 desjenigen des Eisens zugesetzt. Die sich bildenden ternären Phasen aus Al, Co, Fe und Mn verhindern mittels ihrer Form und Anordnung die Versprödung. Auch die Pressbarkeit wird dadurch weiter verbessert. Liegt jedoch der Mangan- oder Kobaltgehalt oberhalb der angegebenen Grenzen, wird die Pressbarkeit wieder reduziert.If a particularly high ductility is to be produced, cobalt is added in a proportion by weight of 1/4 to 1/2 that of iron. The ternary phases formed from Al, Co, Fe and Mn prevent embrittlement by means of their shape and arrangement. This also improves the pressability. However, if the manganese or cobalt content is above the specified limits, the pressability is reduced again.

Der Cu-Gehalt, der zur Festigkeitssteigerung beiträgt, ohne die benötigte Warmumformkraft wesentlich zu erhöhen, sollte 0.25 % nicht übersteigen, falls Korrosionsanfälligkeit speziell vermieden werden soll.The Cu content, which contributes to the increase in strength without significantly increasing the required hot-forming force, should not exceed 0.25% if susceptibility to corrosion is to be specifically avoided.

In den folgenden Beispielen wurden erfindungsgemässe Legierungen (E) mit herkömmlichen ungefähr gleicher Festigkeit (H) verglichen:

  • Code Typ Si Fe Cu Mn Mg V
  • 1 H AIMgSi 0.5; AA 6060.55.21.02.03.55 - 1 E.39.19.17.06.51.08
  • 2 H AIMgSi 0.8; AA 6005 A.62.21.17.06.55 - 2 E.60.21.17.06.55.10
  • 3 H AIMgSi 1.0; AA 6082 1.00.20.05.90.77 -
  • 3 E.81.19.18.06.60.09
  • 4 H AIMgSi 1.0; AA 6082 1.00.20.05.90.77 -
  • 4 E.78.21.17.06.60.09
  • 5 Hl AIMgSi 1.0; AA 6081 1.00.25.03.35.77 -
  • 5 H2 AA 6009.80.25.35.50.60 -
  • 5 E.79.21.16.08.51.10
In the following examples, alloys (E) according to the invention were compared with conventional approximately the same strength (H):
  • Code Type Si Fe Cu Mn Mg V
  • 1 H AIMgSi 0.5; AA 6060.55.21.02.03.55 - 1 E.39.19.17.06.51.08
  • 2 H AIMgSi 0.8; AA 6005 A.62.21.17.06.55 - 2 E.60.21.17.06.55.10
  • 3 H AIMgSi 1.0; AA 6082 1.00.20.05.90.77 -
  • 3 E.81.19.18.06.60.09
  • 4 H AIMgSi 1.0; AA 6082 1.00.20.05.90.77 -
  • 4 E.78.21.17.06.60.09
  • 5 Hl AIMgSi 1.0; AA 6081 1.00.25.03.35.77 -
  • 5 H2 AA 6009.80.25.35.50.60 -
  • 5 E.79.21.16.08.51.10

Die Legierungen 1 bis 3 wurden zu Strangpressprodukten verarbeitet. Die erfindungsgemässen Legierungen (E) unterschieden sich von den herkömmlichen (H) insbesondere durch die bessere Biegefähigkeit der warm ausgehärteten Profile.Alloys 1 to 3 were processed into extruded products. The alloys (E) according to the invention differ from the conventional ones (H) in particular in the better bendability of the thermally hardened profiles.

Die Legierungen 4 wurden zu Warmpressteilen verarbeitet (geschmiedet). Die Warmformbarkeit von 4 E war wesentlich besser als diejenige von 4 H. Während die warmausgehärteten Schmiedeteile aus 4 H erhebliches Grobkorn aufwiesen und somit neben den ungleichmässigen und stellenweise tiefen Festigkeiten nicht dekorativ anodisierbar waren, zeichnete sich das Werkstück aus 4 E durch sehr feines Korn aus.Alloys 4 were processed into hot pressed parts (forged). The thermoformability of 4 U was significantly better than that of 4 H. While the hot-hardened forgings made of 4 H had considerable coarse grain and thus, in addition to the uneven and in places deep strengths, could not be decoratively anodized, the workpiece made of 4 E was characterized by very fine grain .

Die Legierungen 5 wurden zu Blech verarbeitet und vor der Warmaushärtung verformt. Das Blech 5 E wies sowohl in der Tiefziehfähigkeit, wie auch in der Zähigkeit bessere Werte auf.Alloys 5 were processed into sheet metal and deformed before heat hardening. The sheet 5 E showed both in the deep drawing ability, as well in the toughness better values.

Claims (5)

1. An aluminium alloy,
characterized in that
it consists of from 0.3 to 1.0% of magnesium,from 0.3 to 1.2% of silicon, from 0.1 to 0.5% of iron, from 0.05 to 0.20% of vanadium,up to 0.4% of copper, a manganese content which amounts to from 1/4 to 2/3 of the iron content, optionally a cobalt content which amounts to from 1/4 to 1/2 of the iron content, with the remainder aluminium and impurities.
2. An aluminium alloy as in Claim 1,
characterized by an iron content of from 0.15 to 0.25%.
3. An aluminium alloy as in Claim 1 or 2,
characterized by a copper content of from 0.10 to 0.25%.
4. An aluminium alloy as in at least one of the Claims 1 to 3, charaterized by a vanadium content of from 0.06 to 0.14%.
5. An aluminium alloy as in at least one of the Claims 1 to 4, characterized by a manganese content of from 1/3 to 1/2 of the iron content.
EP83810377A 1982-09-13 1983-08-24 Aluminium alloy Expired EP0104139B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83810377T ATE20607T1 (en) 1982-09-13 1983-08-24 ALUMINUM ALLOY.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5413/82 1982-09-13
CH541382 1982-09-13

Publications (2)

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EP0104139A1 EP0104139A1 (en) 1984-03-28
EP0104139B1 true EP0104139B1 (en) 1986-07-02

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US (1) US4525326A (en)
EP (1) EP0104139B1 (en)
AT (1) ATE20607T1 (en)
CA (1) CA1217663A (en)
DE (2) DE3243371A1 (en)
ES (1) ES525517A0 (en)
NO (1) NO160794C (en)
ZA (1) ZA836054B (en)

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RU2483320C1 (en) * 2012-03-05 2013-05-27 Василий Васильевич Ефанов Target recognition method and device for realising said method
US9840761B2 (en) 2012-04-25 2017-12-12 Norsk Hydro Asa Al—Mg—Si aluminium alloy with improved properties
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WO2015112450A1 (en) 2014-01-21 2015-07-30 Alcoa Inc. 6xxx aluminum alloys
CN106488991A (en) * 2014-03-11 2017-03-08 萨帕铝型材公司 High-strength aluminum alloy
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Also Published As

Publication number Publication date
ES8503034A1 (en) 1985-02-01
ATE20607T1 (en) 1986-07-15
NO160794C (en) 1989-05-31
CA1217663A (en) 1987-02-10
US4525326A (en) 1985-06-25
NO160794B (en) 1989-02-20
ZA836054B (en) 1984-04-25
DE3243371A1 (en) 1984-03-15
DE3364381D1 (en) 1986-08-07
EP0104139A1 (en) 1984-03-28
ES525517A0 (en) 1985-02-01
NO833184L (en) 1984-03-14

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