EP0430923A1 - Aluminium alloy for components - Google Patents

Aluminium alloy for components Download PDF

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Publication number
EP0430923A1
EP0430923A1 EP90890296A EP90890296A EP0430923A1 EP 0430923 A1 EP0430923 A1 EP 0430923A1 EP 90890296 A EP90890296 A EP 90890296A EP 90890296 A EP90890296 A EP 90890296A EP 0430923 A1 EP0430923 A1 EP 0430923A1
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EP
European Patent Office
Prior art keywords
less
alloy
degrees celsius
aluminum
thickness
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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.)
Withdrawn
Application number
EP90890296A
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German (de)
French (fr)
Inventor
Martin Dipl.-Ing. Hojas
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.)
Austria Metall AG
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Austria Metall AG
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Publication of EP0430923A1 publication Critical patent/EP0430923A1/en
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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
    • 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
    • C22F1/047—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 magnesium as the next major constituent

Definitions

  • a particularly favorable alloy which is within the content ranges, is designed to contain 4.39% Mg, 0.17% Mn, 0.17% Si, 0.15% Fe, 0.01% Cu, 0, 01% Ti, 0.13% Zr, as well as other elements in a concentration below 0.01% and the rest contains aluminum of conventional purity.
  • Another, particularly advantageous alloy within the content information has also been found to be favorable for such applications where a good surface quality is desired.
  • This alloy can be used particularly in the case of complicated shapes in the motor vehicle outer skin area.
  • This is designed to have 0.56% Mg, 0.15% Mn, 0.90% Si, 0.17% Fe, 0.01% Cu, 0.03% Zn, 0.03% Ti, 0 , 14% Zr, as well as other elements in a concentration below 0.01% and aluminum commercially available as the rest.
  • alloy compositions enable the production of materials with an extremely fine structure. This is done in such a way that the molten alloy is poured, annealed and deformed in a mold, then deformed below the recrystallization temperature by at least 60%, preferably above 75%, and then annealed again.
  • the Fe and Si precipitates act as centers of maximum dislocation accumulation, as well as finely divided smallest precipitates, made of Mn, Zr, Cr and Ti in combination with the remaining alloy elements and aluminum in the direction of grain stabilization.
  • the casting can take place in pans as well as in dies or molds. Strips and sheets produced in this way have the advantage that they can be deformed in a conventional manner and bring the best values, as well as at a higher temperature, which show the extraordinarily good deformability desired in the invention, which the sheets and strips previously used for cold forming of these Alloy class did not show even when forming at a higher temperature.
  • a particularly good process for producing the alloy is designed in such a way that the alloy is cast into a rolled bar of 230 to 380 mm thickness, homogenized for 8 hours at 530 degrees Celsius, the heating rate being less than 30 degrees Celsius per hour, followed by the bars warmed again to a temperature between 510 and 530 degrees Celsius and hot rolled to a thickness of 10 mm, then cooled and cold rolled to a thickness of 2 mm and then at a temperature of up to 530 degrees Celsius and a maximum of 10 hours is annealed.
  • strains of up to 612% have been achieved in the warm tensile test.
  • the procedure was such that tensile specimens with a measuring length of 20 mm and a width of about 10 mm were cut out of the hard-rolled sheet.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metal Rolling (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

Aluminium alloy for components which undergo a high degree of plastic deformation, the said alloy containing less than 0.8% of iron, less than 4.7% of magnesium, between 0.1 and 0.2% of manganese, less than 0.2% of zirconium, less than 0.1% of copper, less than 0.95% of silicon, less than 0.05% of titanium, between 0.06 and 0.15% of chromium and aluminium of conventional purity as the remainder.

Description

Eine besonders günstige Legierung, die sich innerhalb der Gehaltsbereiche befindet, ist so gestaltet, daß sie 4,39% Mg, 0,17% Mn, 0,17% Si, 0,15% Fe, 0,01% Cu, 0,01% Ti, 0,13% Zr, sowie andere Elemente in einer Konzentration unter 0,01% und den Rest Aluminium herkömmlicher Reinheit enthält.A particularly favorable alloy, which is within the content ranges, is designed to contain 4.39% Mg, 0.17% Mn, 0.17% Si, 0.15% Fe, 0.01% Cu, 0, 01% Ti, 0.13% Zr, as well as other elements in a concentration below 0.01% and the rest contains aluminum of conventional purity.

Der Einsatzbereich dieser Legierung erstreckt sich über das gesamte Feld der extrem verformten Blechteile, insbesondere Behälter mit komplizierter Formgebung und den Kraftfahrzeug-Innenhautbereich, wo auf die Oberflächenqualität geringeres Augenmerk gelegt wird, sondern die maximale, über das konventionell erzielbare Maß hinausgehende Verformbarkeit entscheidend ist.The area of application of this alloy extends over the entire field of extremely deformed sheet metal parts, in particular containers with a complicated shape and the automotive interior skin area, where less attention is paid to the surface quality, but the maximum formability that goes beyond the conventionally achievable level is decisive.

Eine andere, besonders vorteilhafte Legierung innerhalb der Gehaltsangaben hat sich ebenfalls herausgestellt, die bei solchen Einsatzzwecken günstig ist, wo eine gute Oberflächenqualität gewünscht wird. Diese Legierung ist besonders bei komplizierten Formgebungen im Kraftfahrzeug-Außenhautbereich verwendbar.Another, particularly advantageous alloy within the content information has also been found to be favorable for such applications where a good surface quality is desired. This alloy can be used particularly in the case of complicated shapes in the motor vehicle outer skin area.

Diese ist so gestaltet, daß sie 0,56% Mg, 0,15% Mn, 0,90% Si, 0,17% Fe, 0,01% Cu, 0,03% Zn, 0,03% Ti, 0,14% Zr, sowie andere Elemente in einer Konzentration unter 0,01% und Aluminium handelsüblicher Reinheit als Rest enthält.This is designed to have 0.56% Mg, 0.15% Mn, 0.90% Si, 0.17% Fe, 0.01% Cu, 0.03% Zn, 0.03% Ti, 0 , 14% Zr, as well as other elements in a concentration below 0.01% and aluminum commercially available as the rest.

Diese Legierungszusammensetzungen ermöglichen die Erzeugung von Werkstoffen mit außerordentlich feinem Gefüge. Diese erfolgt so, daß die geschmolzene Legierung in einer Form vergossen, geglüht und verformt, darauffolgend unterhalb der Rekristallisationstemperatur um wenigstens 60%, vorzugsweise über 75% verformt und anschließend wieder geglüht wird.These alloy compositions enable the production of materials with an extremely fine structure. This is done in such a way that the molten alloy is poured, annealed and deformed in a mold, then deformed below the recrystallization temperature by at least 60%, preferably above 75%, and then annealed again.

Damit kann ein feinkörniges Gefüge mit einer mittleren Korngröße unter 10 ym erzeugt werden. Dabei wirken die Fe- und Si-Ausscheidungen als Zentren höchsten Versetzungsaufstaues, sowie fein verteilte kleinste Ausscheidungen, aus Mn, Zr, Cr und Ti in Verbindungen mit den restlichen Legierungselementen und Aluminium in Richtung Kornstabilisierung.This enables a fine-grain structure with an average grain size of less than 10 μm to be produced. The Fe and Si precipitates act as centers of maximum dislocation accumulation, as well as finely divided smallest precipitates, made of Mn, Zr, Cr and Ti in combination with the remaining alloy elements and aluminum in the direction of grain stabilization.

Das Vergießen kann dabei sowohl in Pfannen, wie auch in Gesenken oder Kokillen erfolgen. So erzeugte Bänder und Bleche haben den Vorteil, daß sie sowohl auf herkömmliche Weise verformt werden können und dabei beste Werte bringen, als auch bei höherer Temperatur, die in der Erfindung angestrebte außerordentlich gute Verformbarkeit zeigen, die die bisher zur Kaltverformung herangezogenen Bleche und Bänder dieser Legierungsklasse auch bei der Umformung bei höherer Temperatur nicht zeigten.The casting can take place in pans as well as in dies or molds. Strips and sheets produced in this way have the advantage that they can be deformed in a conventional manner and bring the best values, as well as at a higher temperature, which show the extraordinarily good deformability desired in the invention, which the sheets and strips previously used for cold forming of these Alloy class did not show even when forming at a higher temperature.

Ein besonders gutes Verfahren zur Herstellung der Legierung ist so gestaltet, daß die Legierung zu einem Walzbarren von 230 bis 380 mm Dicke vergossen, 8 Stunden bei 530 Grad Celsius homogenisiert wird, wobei die Heizrate kleiner als 30 Grad Celsius pro Stunde ist, darauffolgend der Barren erneut auf eine Temperatur zwischen 510 und 530 Grad Celsius angewärmt und auf eine Dicke von 10 mm warm abgewalzt, danachfolgend abgekühlt und auf eine Dicke von 2 mm kalt abgewalzt und anschließend bei einer Temperatur bis zu maximal 530 Grad Celsius und einer Zeit von maximal 10 Stunden geglüht wird.A particularly good process for producing the alloy is designed in such a way that the alloy is cast into a rolled bar of 230 to 380 mm thickness, homogenized for 8 hours at 530 degrees Celsius, the heating rate being less than 30 degrees Celsius per hour, followed by the bars warmed again to a temperature between 510 and 530 degrees Celsius and hot rolled to a thickness of 10 mm, then cooled and cold rolled to a thickness of 2 mm and then at a temperature of up to 530 degrees Celsius and a maximum of 10 hours is annealed.

Durch diese Behandlungen sind im Warmzugversuch Dehnungen bis zu 612% erreicht worden. Dabei wurde so vorgegangen, daß aus dem walzharten Blech Zugproben ausgeschnitten wurden, die eine Meßlänge von 20 mm und eine Breite von etwa 10 mm haben.With these treatments, strains of up to 612% have been achieved in the warm tensile test. The procedure was such that tensile specimens with a measuring length of 20 mm and a width of about 10 mm were cut out of the hard-rolled sheet.

Claims (5)

Aluminiumlegierung für Bauteile, die eine hohe plastische Umformung erfahren, dadurch gekennzeichnet, daß sie weniger als 0,8% Eisen, weniger als 4,7% Magnesium, Mangan zwischen 0,1 und 0,2%, Zirkon weniger als 0,2%, Kupfer unter 0,1%, Silizium unter 0,95%, Titan unter 0,05%, Chrom zwischen 0,06 und 0,15%, sowie als Rest Aluminium herkömmlicher Reinheit enthält.Aluminum alloy for components that undergo high plastic deformation, characterized in that they contain less than 0.8% iron, less than 4.7% magnesium, manganese between 0.1 and 0.2%, zirconium less than 0.2% , Copper less than 0.1%, silicon less than 0.95%, titanium less than 0.05%, chromium between 0.06 and 0.15%, and the rest contains aluminum of conventional purity. Aluminiumlegierung für Bauteile nach Anspruch 1, dadurch gekennzeichnet, daß sie 4,39% Mg, 0,17% Mn, 0,17% Si, 0,15% Fe, 0,01% Cu, 0,01% Ti, 0,13% Zr, sowie andere Elemente in einer Konzentration unter 0,01% und den Rest Aluminium herkömmlicher Reinheit enthält.Aluminum alloy for components according to claim 1, characterized in that they contain 4.39% Mg, 0.17% Mn, 0.17% Si, 0.15% Fe, 0.01% Cu, 0.01% Ti, 0, 13% Zr, as well as other elements in a concentration below 0.01% and the rest contains aluminum of conventional purity. Aluminiumlegierung für Bauteile nach Anspruch 1, dadurch gekennzeichnet, daß sie 0,56% Mg, 0,15% Mn, 0,90% Si, 0,17% Fe, 0,01% Cu, 0,03% Zn, 0,03% Ti, 0,14% Zr, sowie andere Elemente in einer Konzentration unter 0,01% und Aluminium herkömmlicher Reinheit als Rest enthält.Aluminum alloy for components according to claim 1, characterized in that they contain 0.56% Mg, 0.15% Mn, 0.90% Si, 0.17% Fe, 0.01% Cu, 0.03% Zn, 0, 03% Ti, 0.14% Zr, as well as other elements in a concentration below 0.01% and aluminum of conventional purity as the rest. Verfahren zur Herstellung eines Gegenstandes durch große plastische Umformung aus einer Legierung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die geschmolzene Legierung in einer Form vergossen, geglüht und verformt, darauffolgend unterhalb der Rekristallisationstemperatur um wenigstens 60% (vorzugsweise über 75%) verformt und anschliessend wieder geglüht wird.Process for the production of an object by large plastic forming from an alloy according to one of the preceding claims, characterized in that the molten alloy is cast, annealed and deformed in a mold, subsequently deformed by at least 60% (preferably above 75%) below the recrystallization temperature and is then annealed again. Verfahren zur Herstellung eines Bleches mit hoher plastischer Umformbarkeit aus einer Legierung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die geschmolzene Legierung zu einem Walzbarren von 230 bis 380 mm Dicke vergossen, 8 Stunden bei 530 Grad Celsius homogenisiert, wobei die Heizrate weniger als 30 Grad Celsius pro Stunde beträgt, der Barren darauffolgend erneut auf eine Temperatur zwischen 510 und 530 Grad Celsius angewärmt und auf eine Dicke von 10 mm warm abgewalzt, danachfolgend abgekühlt und auf eine Dicke von 2 mm kalt abgewalzt wird und anschließend bei einer Temperatur bis zu maximal 530 Grad Celsius und einer Zeit von maximal 10 Stunden geglüht wird.Process for producing a sheet with high plastic formability from an alloy according to one of the preceding claims, characterized in that the molten alloy is cast into a rolled bar of 230 to 380 mm thickness, homogenized for 8 hours at 530 degrees Celsius, the heating rate being less than 30 Degrees Celsius per hour, the ingot is then heated again to a temperature between 510 and 530 degrees Celsius and hot rolled to a thickness of 10 mm, then cooled and cold rolled to a thickness of 2 mm and then at a temperature up to a maximum 530 degrees Celsius and a maximum time of 10 hours.
EP90890296A 1989-11-30 1990-11-06 Aluminium alloy for components Withdrawn EP0430923A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT272989A AT394580B (en) 1989-11-30 1989-11-30 METHOD FOR PRODUCING A SHEET FROM AN ALUMINUM ALLOY FOR COMPONENTS
AT2729/89 1989-11-30

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EP0430923A1 true EP0430923A1 (en) 1991-06-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005103313A1 (en) * 2004-04-23 2005-11-03 Nippon Light Metal Company, Ltd. Al-mg alloy sheet with excellent formability at high temperatures and high speeds and method of production of same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1344249A (en) * 1970-02-25 1974-01-16 Olin Corp Process for treating an aluminum base alloy
DE2353842A1 (en) * 1973-10-26 1975-04-30 Kaiser Aluminium Chem Corp Aluminium alloy sheet for integral colour anodising - composition and treatment to provide controllable uniform colour
GB2135694A (en) * 1983-02-28 1984-09-05 Mitsubishi Aluminium Superplastic aluminium alloy

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1344249A (en) * 1970-02-25 1974-01-16 Olin Corp Process for treating an aluminum base alloy
DE2353842A1 (en) * 1973-10-26 1975-04-30 Kaiser Aluminium Chem Corp Aluminium alloy sheet for integral colour anodising - composition and treatment to provide controllable uniform colour
GB2135694A (en) * 1983-02-28 1984-09-05 Mitsubishi Aluminium Superplastic aluminium alloy

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
AMERICAN SOCIETY FOR METALS: "Metal Handbook", Ausgabe 9, Band 2, 1979, Seiten 104-112, Society for Metals, Ohio, US *
K.R. VAN HORN: "Aluminium", Band 2, 1967, Seiten 343-366, Kapital 15, American Society for Metals, Ohio, US; W.C. KEITH et al.: "Automative applications outside the engine" *
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 107 (C-341)[2169], 22. April 1986; & JP-A-60 238 461 (KOBE SEIKOSHO K.K.) 27-11-1985 *
PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 181 (C-180)[1326], 10. August 1983; & JP-A-58 87 237 (MITSUBISHI ALUMINIUM K.K.) 25-05-1983 *
W. HUFNAGEL: "Aluminium Taschenbuch", Ausgabe 14, 1983, Seiten 44-45,1011-1018, Aluminium Verlag, Düsseldorf, DE *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005103313A1 (en) * 2004-04-23 2005-11-03 Nippon Light Metal Company, Ltd. Al-mg alloy sheet with excellent formability at high temperatures and high speeds and method of production of same

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Publication number Publication date
ATA272989A (en) 1991-10-15
AT394580B (en) 1992-05-11

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