EP2061912B1 - ALLIAGE D'ALUMINIUM DE TYPE AIZnMG ET PROCÉDÉ POUR SA PRODUCTION - Google Patents

ALLIAGE D'ALUMINIUM DE TYPE AIZnMG ET PROCÉDÉ POUR SA PRODUCTION Download PDF

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Publication number
EP2061912B1
EP2061912B1 EP07800163.3A EP07800163A EP2061912B1 EP 2061912 B1 EP2061912 B1 EP 2061912B1 EP 07800163 A EP07800163 A EP 07800163A EP 2061912 B1 EP2061912 B1 EP 2061912B1
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EP
European Patent Office
Prior art keywords
weight
aluminum
heat treatment
alloy
aluminum alloy
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.)
Active
Application number
EP07800163.3A
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German (de)
English (en)
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EP2061912A1 (fr
Inventor
Günther TRENDA
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.)
Aluminium Lend GmbH
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Aluminium Lend GmbH
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Publication of EP2061912A1 publication Critical patent/EP2061912A1/fr
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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
    • C22C21/10—Alloys based on aluminium with zinc 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
    • C22F1/053—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 zinc as the next major constituent

Definitions

  • the invention relates to aluminum alloys, in particular those aluminum alloys, which are suitable for the production of low-stress and high-strength aluminum pre-material.
  • the invention further relates to a process for producing such aluminum pre-materials.
  • Tools for plastic injection molding require low-tension and high-strength primary material.
  • the cause of stresses in the starting material are the residual stresses from the continuous casting process, caused by temperature gradients during casting, as well as those from the heat treatment, which are stresses caused by the quenching process. Tensions in the starting material lead to an impairment of the dimensional stability during machining and thus to the distortion of the component. Usually straightening due to narrow tolerances is not possible, the workpieces must be imposed.
  • the precipitation-hardenable aluminum alloy EN AW-6082 an AlMgSi1Mn alloy
  • this material is cast in the continuous casting to rectangular formats and then subjected to the formation of the precipitated at the grain boundaries alloying elements and to compensate for casting (ds concentration differences of alloying elements) of a first heat treatment (the so-called homogenization).
  • a second heat treatment to adjust the mechanical properties.
  • a forming step eg rolling
  • the state of the art here is to carry out a full cure, comprising a solution heat treatment, a subsequent quenching in cold water and a subsequent heat aging.
  • solution annealing the hardness-forming agent magnesium silicide Mg 2 Si is dissolved by diffusion in the primary mixed crystal at temperatures around 550 ° C, depending on the format, for 6 to 10 hours.
  • quenching in cold water which causes cooling to below 150 ° C in less than 20 seconds, there is a freezing of the equilibrium state set at the solution annealing temperature, which corresponds to an unbalance state at room temperature.
  • the subsequent thermal aging at temperatures of 150 to 200 ° C for 8 to 15 hours represents a targeted elimination of hardness to adjust the strength.
  • Aluminum ingots treated in this way have very good mechanical properties, but are unsuitable for use in mechanical processing because of the residual stresses created by quenching in cold water. Therefore, the aluminum billets are subjected to cold working to degrade most of the residual stresses from the quenching process. The aluminum ingots are subsequently stretched by 1 to 5% of the original length for heat treatment by means of hydraulic systems.
  • Aluminum plates produced by this extensive process are characterized by good mechanical strength, but are only low tension, a delay in mechanical processing can still occur.
  • thermomechanical load of such aluminum plates leads to a steady loss of strength and thus leads to continuously increasing wear of the tool.
  • the aluminum alloy according to the invention comprises 5.3-5.5% by weight of zinc, 0.2-0.25% by weight of chromium, 0.2-0.3% by weight of manganese and 0, 3 - 0.4 wt .-% copper.
  • the aluminum alloy according to the invention is suitable for the production of aluminum pre-material for subsequent mechanical processing or for use in cold extrusion presses.
  • the aluminum pre-material is preferably an aluminum cast plate.
  • a further object of the invention is a post-treatment of aluminum pre-fabricated from an aluminum alloy according to the invention with the aim to obtain a low-tension and high-strength aluminum pre-material, which for the subsequent mechanical processing and the workpieces produced from the starting material, eg base plates for plastic injection molds, advantageous mechanical properties ensures.
  • This after-treatment according to the invention provides a first heat treatment at up to 480 ° C., a cooling to room temperature and a subsequent second heat treatment at up to 200 ° C.
  • cold aging occurs at about room temperature for 2 to 5 days.
  • a second heat treatment in two stages.
  • a temperature of 80 to 120 ° C during a period of 6 to 12 hours is preferably provided while in the second stage a Temperature of 135 to 150 ° C for 10 to 16 hours is provided.
  • AlZnMg alloys of different composition were cast in a series of continuous castings into rectangular formats of 1550 x 250 x 3000 mm and tested for their mechanical properties after complete cold curing.
  • a tensile test according to EN 10002-5 was carried out; the values given are average values of 20 tensile specimens each.
  • the AIZnMg alloys were further compared with the known reference alloy EN AW-6082, which was treated in the manner conventional in the art.
  • the alloy was quenched in the condition T651, ie solution treated, stretched to 1-3% low tension, cured while hot, subjected to mechanical testing.
  • the mechanical characteristics obtained are as follows: Tensile strength R M [MPa] 0.2% proof stress P P0.2 [MPa] Elongation at break A5 [%] Brinell Hardness HB 10 288 248 7.5 90
  • the sample plates prepared from the alloys of Experiments 1 to 3 were stress relieved in a first heat treatment step at 400 to 450 ° C for 40 to 80 minutes, after cooling to room temperature at a rate of about 200 ° C / h a second heat treatment was carried out to shorten the cold curing at temperatures of 85 to 120 ° C for 24 to 26 hours.
  • the alloys of tests 1 to 3 of the currently commonly used alloy A are superior in terms of mechanical strength, elongation at break and Brinell hardness.
  • the alloy according to the invention exhibits a significantly higher tensile strength both with respect to the reference alloy and with respect to the alloys of Experiments 1 and 2 and is distinguished from the reference alloy by a significantly higher Brinell hardness value.
  • An aluminum casting plate of an alloy having the composition of Experiment 3 was subjected to a post-treatment according to Experiment 3, except that the second heat treatment was carried out in two stages.
  • the first stage included a heat treatment at about 90 ° C for 8 to 10 hours; the second stage included a heat treatment at about 145 ° C for 14 to 16 hours.
  • temperatures of the heat treatments which are advantageous for achieving the desired mechanical characteristics and the duration of the respective heat treatments required for this purpose can vary within the ranges specified in the patent claims, depending on the composition of the particular aluminum alloy according to the invention.
  • the optimum parameters for the particular alloy according to the invention can easily be determined by the person skilled in the art by means of experiments that are in his or her abilities.
  • the higher hardness in comparison to the reference alloy increases the resistance to mechanical stress in use, the property of cold curing in the alloys according to the invention leads after thermal stress to a healing effect of the mechanical properties.
  • the durability of e.g. Tools for plastic injection molding is thereby significantly increased.
  • the high hardness of the alloys according to the invention in the cold-cured state and their compared to the reference alloy significantly reduced elongation also bring in the machining very short-breaking chips, the achievable surface quality, characterized by roughness and the visual impression is therefore improved compared to the reference alloy.
  • the alloys according to the invention are also outstandingly suitable for decorative anodic oxidation.
  • the chromium content minimizes the tendency of the stress corrosion cracking alloy of the present invention to have a negative influence on the anodic oxidation due to the maximum content of 0.3% by weight.

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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)
  • Forging (AREA)
  • Powder Metallurgy (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Continuous Casting (AREA)

Claims (11)

  1. Alliage d'aluminium, caractérisé en ce qu'il comprend 5,0 - 5,8 %-poids de zinc
    1,1 - 1,2 %-poids de magnésium
    0,2 - 0,3 %-poids de chrome
    0,1 - 0,3 %-poids de manganèse
    0,1 - 0,4 %-poids de cuivre
    0,05 - 0,15 %-poids de titane
    0,005 - 0,05 %-poids de cérium
    0,005 - 0,05 %-poids de samarium
    au maximum 0,2 %-poids de silicium
    au maximum 0,3 %-poids de fer
    au maximum 0,005 %-poids de zirconium,
    le reste étant de l'aluminium.
  2. Alliage d'aluminium selon la revendication 1, caractérisé en ce qu'il comprend
    5,3 - 5,5 %-poids de zinc
    0,2 - 0,25 %-poids de chrome
    0,2 - 0,3 %-poids de manganèse
    0,3 - 0,4 %-poids de cuivre.
  3. Utilisation d'un alliage d'aluminium selon les revendications 1 et 2 pour la fabrication d'un matériau primaire de l'aluminium destiné à un usinage mécanique ultérieur.
  4. Utilisation d'un alliage d'aluminium selon les revendications 1 et 2 pour la fabrication d'un matériau primaire de l'aluminium destiné à l'extrusion à froid.
  5. Utilisation selon la revendication 3 ou 4, caractérisé en ce que, concernant le matériau primaire de l'aluminium, il s'agit d'une plaque de fonte d'aluminium.
  6. Matériau primaire de l'aluminium en alliage d'aluminium selon la revendication 1 ou 2.
  7. Matériau primaire de l'aluminium selon la revendication 6 sous forme d'une plaque de fonte d'aluminium.
  8. Procédé de fabrication de matériau primaire de l'aluminium à partir d'un alliage d'aluminium selon la revendication 1 ou 2, caractérisé en ce qu'un post-traitement comprend un premier traitement thermique jusqu'à 480 °C, un refroidissement à la température ambiante et un deuxième traitement thermique consécutif jusqu'à 200 °C.
  9. Procédé selon la revendication 8, caractérisé en ce que, avant le deuxième traitement thermique, il est réalisé une maturation à peu près à la température ambiante pendant 2 à 5 jours.
  10. Procédé selon la revendication 8 ou 9, caractérisé en ce que le deuxième traitement thermique est effectué en deux étapes.
  11. Procédé selon la revendication 10, caractérisé en ce que, dans la première étape, il est prévu une température de 80 à 120 °C pendant une durée de 6 à 12 heures, et en ce que, dans la deuxième étape, il est prévu une température de 135 à 150 °C pendant 10 à 16 heures.
EP07800163.3A 2006-09-04 2007-09-03 ALLIAGE D'ALUMINIUM DE TYPE AIZnMG ET PROCÉDÉ POUR SA PRODUCTION Active EP2061912B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0147206A AT504089B1 (de) 2006-09-04 2006-09-04 Aluminiumlegierung und verfahren zu deren herstellung
PCT/AT2007/000418 WO2008028208A1 (fr) 2006-09-04 2007-09-03 ALLIAGE D'ALUMINIUM DE TYPE AIZnMG ET PROCÉDÉ POUR SA PRODUCTION

Publications (2)

Publication Number Publication Date
EP2061912A1 EP2061912A1 (fr) 2009-05-27
EP2061912B1 true EP2061912B1 (fr) 2013-05-01

Family

ID=38626916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07800163.3A Active EP2061912B1 (fr) 2006-09-04 2007-09-03 ALLIAGE D'ALUMINIUM DE TYPE AIZnMG ET PROCÉDÉ POUR SA PRODUCTION

Country Status (9)

Country Link
US (1) US8491733B2 (fr)
EP (1) EP2061912B1 (fr)
AR (1) AR062642A1 (fr)
AT (1) AT504089B1 (fr)
CA (1) CA2697691A1 (fr)
MX (1) MX2009002390A (fr)
RU (1) RU2484169C2 (fr)
TW (1) TWI434939B (fr)
WO (1) WO2008028208A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI467026B (zh) * 2013-06-27 2015-01-01 China Steel Corp 陽極用鋁合金片及其製造方法
WO2015041867A1 (fr) * 2013-09-19 2015-03-26 United Technologies Corporation Alliages d'aluminium renforcés par dispersion durcissables par vieillissement
JP7244195B2 (ja) * 2019-07-11 2023-03-22 株式会社神戸製鋼所 ７０００系アルミニウム合金製部材の製造方法
CN111304502A (zh) * 2020-04-07 2020-06-19 台山市金桥铝型材厂有限公司 一种汽车车身用高强7000系列铝合金型材及制造方法
CN111270115A (zh) * 2020-04-07 2020-06-12 台山市金桥铝型材厂有限公司 汽车车身用的高强7000系列铝合金型材的制造方法
AR127052A1 (es) 2021-09-13 2023-12-13 Ypf Tecnologia Sa Aleación disoluble de magnesio
CN114033591A (zh) * 2021-11-16 2022-02-11 苏州星波动力科技有限公司 铝合金油轨及其成型方法和制造方法、发动机、汽车

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB598192A (en) * 1945-05-10 1948-02-12 Richard Chadwick Improvements in or relating to aluminium base alloys
CH266151A (de) 1946-06-28 1950-01-15 Ici Ltd Aluminiumlegierung.
CH268244A (de) 1947-02-19 1950-05-15 Ici Ltd Verfahren zur Verbesserung der Korrosionsbeständigkeit von Aluminiumlegierungen.
JPS6434548A (en) * 1987-07-30 1989-02-06 Furukawa Aluminium Production of high strength aluminum foil
FR2744136B1 (fr) * 1996-01-25 1998-03-06 Pechiney Rhenalu Produits epais en alliage alznmgcu a proprietes ameliorees
RU2165996C1 (ru) * 1999-10-05 2001-04-27 Государственное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" Высокопрочный сплав на основе алюминия и изделие, выполненное из него
RU2165995C1 (ru) * 1999-10-05 2001-04-27 Государственное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" Высокопрочный сплав на основе алюминия и изделие, выполненное из этого сплава
RU2215807C2 (ru) * 2001-12-21 2003-11-10 Региональный общественный фонд содействия защите интеллектуальной собственности Сплав на основе алюминия, изделие из него и способ производства изделия
US7048815B2 (en) * 2002-11-08 2006-05-23 Ues, Inc. Method of making a high strength aluminum alloy composition

Also Published As

Publication number Publication date
TWI434939B (zh) 2014-04-21
EP2061912A1 (fr) 2009-05-27
US8491733B2 (en) 2013-07-23
CA2697691A1 (fr) 2008-03-13
TW200831681A (en) 2008-08-01
RU2484169C2 (ru) 2013-06-10
US20100089506A1 (en) 2010-04-15
WO2008028208A1 (fr) 2008-03-13
MX2009002390A (es) 2009-06-08
AR062642A1 (es) 2008-11-19
AT504089B1 (de) 2008-08-15
RU2009112403A (ru) 2010-10-20
AT504089A1 (de) 2008-03-15

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