EP2103701B1 - Alliage d'aluminium et procédé de fabrication d'un produit à partir d'un alliage d'aluminium - Google Patents

Alliage d'aluminium et procédé de fabrication d'un produit à partir d'un alliage d'aluminium Download PDF

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Publication number
EP2103701B1
EP2103701B1 EP09001885A EP09001885A EP2103701B1 EP 2103701 B1 EP2103701 B1 EP 2103701B1 EP 09001885 A EP09001885 A EP 09001885A EP 09001885 A EP09001885 A EP 09001885A EP 2103701 B1 EP2103701 B1 EP 2103701B1
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EP
European Patent Office
Prior art keywords
aluminum alloy
temperature
essentially
less
product
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
EP09001885A
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German (de)
English (en)
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EP2103701A1 (fr
Inventor
Hoch Erich
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.)
Fw Brokelmann Aluminiumwerk & Cokg GmbH
Original Assignee
Fw Brokelmann Aluminiumwerk & Cokg GmbH
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Priority to PL09001885T priority Critical patent/PL2103701T3/pl
Publication of EP2103701A1 publication Critical patent/EP2103701A1/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
    • C22C21/02—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
    • C22C21/06—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
    • 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
    • C22F1/05—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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions

Definitions

  • the invention relates to an aluminum alloy, in particular for processing by extrusion and a method for producing a product from such an aluminum alloy, wherein a semifinished product produced from the aluminum alloy is homogenized by heating, the homogenized semi-finished product is brought to use temperature and by hot processing on product form.
  • Aluminum alloys have long been known for their different properties and for very different uses in metalworking. Due to its low density, aluminum is fundamentally interesting as a metal in the construction of transport vehicles, especially for those means of transport which have to accelerate their own mass, the mass of which therefore decisively influences the energy consumption of the means of transport. Aluminum is therefore increasingly of interest as a material in vehicle and aircraft construction.
  • the advantageous low density of aluminum faces low strength and comparatively high brittleness (low yield strength and low ductility).
  • aluminum alloys which are disadvantageous in particular for applications in the body structure area, can be avoided by using small amounts of substance in aluminum alloys, with aluminum alloys being able to achieve strengths which are similar to those of steel. It is known, aluminum in the range of a total of a few mass% other elements, in particular metals, such as. As iron, silicon, copper, titanium, manganese, etc., to mix.
  • composition of the aluminum alloy itself as well as the further treatment of the aluminum alloy has a decisive influence on the strength and corrosion properties of the aluminum alloy. Slight changes in the composition of the aluminum alloy may result in surprising changes in the mechanical properties of the aluminum alloy.
  • aluminum wrought alloys are known, which are well usable for hot and cold forming and on the other hand aluminum casting alloys, which are suitable for use with casting, but a transformation can be subjected only to a very limited.
  • Other alloys are in turn suitable for curing by aging annealing, others - depending on the composition - again not.
  • the stated object is achieved according to the invention initially and essentially in the subject aluminum alloy in that the aluminum alloy has the following alloy elements in the following composition in mass%: Si 0.68 - 0.77, Fe 0.16 to 0.24, Cu 0.24-0.32, Mn 0.68 - 0.77, mg 0.58 - 0.67, Cr ⁇ 0.04, Zn ⁇ 0.1, Ti ⁇ 0.1, V ⁇ 0.04, other components (total) ⁇ 0,3 and Al rest.
  • Such an aluminum alloy is eminently suitable for hot working and can be aftertreated to easily achieve critical yield stresses R p0.2 greater than 280 MPa.
  • critical yield stresses R p0.2 greater than 280 MPa are also advantageous.
  • Such an aluminum alloy has exceptionally good properties in terms of its processibility by an extrusion process.
  • the alloying elements may vary only in a smaller tolerance range, whereby the strength properties can be achieved with greater process reliability; conversely, the requirements for the production of the aluminum alloy itself grow.
  • Such an aluminum alloy contains the already mentioned alloying elements which are in the following tolerance ranges in mass%: Si 0.70 - 0.75, Fe 0.18 - 0.22, Cu 0.26 - 0.30, Mn 0.70 - 0.75, mg 0.60 - 0.65, Cr ⁇ 0.02, Zn ⁇ 0.05, Ti ⁇ 0.05, V ⁇ 0.02, other components (total) ⁇ 0.15 and Al rest.
  • the invention therefore further relates to a method for producing a product from an aluminum alloy, wherein the aluminum alloy is configured in the aforementioned composition.
  • the semifinished product consisting of the aluminum alloy which may for example be in the form of bolts, is homogenized by keeping it in the temperature range of 550 ° C. and 590 ° C. for a period of essentially 3 to 5 hours, in particular in the temperature range between 560 ° C and 580 ° C, and it is particularly preferred if the temperature is set within the Homogenticiansphase fixed in the specified temperature ranges.
  • an operating temperature in the range of substantially 470 ° C to about 500 ° C. becomes.
  • the aluminum alloy in question here can be processed gently, without jeopardizing the previously achieved by the homogenization advantageous material properties.
  • the hot working of the semifinished product is carried out by extrusion, wherein here press speeds in the range of substantially 4m / min to 10m / min have been found to be advantageous.
  • the value of the pressing speed depends on the profile geometry to be achieved, that is, inter alia, on the forming work to be performed in the die.
  • a press speed in the range of 6m / min to 8m / min has proven to be particularly advantageous, with a press speed of 6m / min has been found suitable for most applications.
  • the cooling of the product following the hot working is of considerable importance for the material properties of the product obtained. It has been found, in particular, that a particularly rapid cooling of the product after hot working is conducive, in particular a cooling with a temperature gradient of at least -20 ° C / s, preferably an even greater cooling rate with a temperature gradient of at least -40 ° C. / s, wherein a temperature gradient of at least -50 ° C / s is particularly advantageous.
  • the effect achieved by the cooling influencing the material properties of the previously hot worked product according to a further embodiment of the method is particularly effective when the cooling of the product to a temperature of substantially below 100 ° C.
  • the strength of the product is increased by final curing, in particular by removal of the product over a period of time substantially 1 to 3 hours, preferably less than 2 hours, in a temperature range of substantially 100 ° C to 210 ° C, with a temperature range of 200 ° C to 210 ° C being preferred. Curing takes place in particular by selecting a temperature over the duration of the aging in the specified temperature ranges.
  • An aluminum alloy having the following composition in mass% is used: Si 0.71, Fe 0.22 Cu 0.28 Mn 0.71, mg 0.63 Cr 0.0014, Zn 0.0071, Ti 0.0346, V 0.0059, other components (total) 0.15 and Al rest.
  • a semi-finished product is made in the form of an aluminum bolt with a diameter of 200 mm.
  • This aluminum stud is homogenized for 5 hours at 570 ° C, resulting in a uniformly fine-grained cast structure, the globulitic and fine-celled over the entire cross section; the achieved grain size is clearly smaller than 150 ⁇ m.
  • the now present as a profile product is cooled as soon as possible from about 530 ° C to below 100 ° C, in this case within less than 10 seconds.
  • the abrupt profile cooling is essential for the material properties necessarily to be achieved in body structure engineering.
  • the extruded section thus obtained is finally cured for one hour at 205 ° C.
  • the resulting material has a yield strength R p0.2 of significantly more than 280 MPa and is able to absorb deformation work even at crash test loads without losing the inner cohesion - that is, without tearing - resulting in both the small and the true on a large scale.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Forging (AREA)
  • Extrusion Of Metal (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Cookers (AREA)
  • Powder Metallurgy (AREA)

Claims (12)

  1. Alliage d'aluminium, en particulier destiné à être utilisé dans un procédé d'extrusion,
    caractérisé par
    une composition en % en masse de : Si 0, 68 - 0,77, Fe 0,16 - 0,24, Cu 0,24 - 0,32, Mn 0,68 - 0,77, Mg 0,58 - 0,67, Cr < 0,04, Zn < 0,1, Ti < 0,1, V < 0,04, autres composants (au total) < 0,3 et Al le solde.
  2. Alliage d'aluminium selon la revendication 1, caractérisé en ce que les plages de tolérance des teneurs en % en masse sont plus étroites et valent : Si 0,70 - 0,75, Fe 0,18 - 0,22, Cu 0,26 - 0,30, Mn 0,70 - 0,75, Mg 0, 60 - 0,65, Cr < 0,02, Zn < 0,05, Ti < 0,05, V < 0,02, autres composants (au total) < 0,15 et Al le solde.
  3. Alliage d'aluminium selon les revendications 1 ou 2, caractérisé en ce que les teneurs en les autres composants représentent moins de 0,1 % en masse, en particulier moins de 0,05 % en masse et de façon tout particulièrement préférable moins de 0,02 % en masse.
  4. Procédé de fabrication d'un produit à partir d'un alliage d'aluminium, dans lequel un produit semi-fini fabriqué en l'alliage d'aluminium est homogénéisé par chauffage (recuit d'homogénéisation), le produit semi-fini homogénéisé est amené à la température d'utilisation et transformé en le produit par traitement thermique,
    caractérisé en ce que
    l'alliage d'aluminium est configuré selon l'une des revendications 1 à 3.
  5. Procédé selon la revendication 4, caractérisé en ce que le produit semi-fini, en particulier en forme de barre, est homogénéisé en étant maintenu essentiellement pendant une durée de 3 à 5 heures dans la plage de température de 550°C à 590°C, en particulier dans la plage de température de 560°C et 580°C et de préférence à une température fixe dans les plages de température indiquées.
  6. Procédé selon les revendications 4 ou 5,
    caractérisé en ce que l'homogénéisation du produit semi-fini entraîne la formation de grains d'une taille inférieure à 150 µm ou de grains d'une taille ASTM E 112 G = 5 ou supérieure.
  7. Procédé selon l'une des revendications 4 à 6,
    caractérisé en ce que pour le traitement thermique, le produit semi-fini est amené à une température d'utilisation essentiellement comprise dans la plage de 450°C à 500°C et de préférence à une température d'utilisation essentiellement comprise entre 470°C et environ 500°C.
  8. Procédé selon l'une des revendications 4 à 7, caractérisé en ce que le traitement thermique du produit semi-fini s'effectue par extrusion, en particulier à une vitesse d'extrusion essentiellement comprise dans la plage de 4 m/min à 10 m/min et en particulier à une vitesse d'extrusion essentiellement comprise dans la plage de 6 m/min à 8 m/min.
  9. Procédé selon l'une des revendications 4 à 8, caractérisé en ce qu'après le traitement thermique, le produit est refroidi rapidement, en particulier à un gradient de température d'au moins -20°C/s, de préférence à un gradient de température d'au moins -40°C/s et de façon plus particulièrement préférable à une gradient de température d'au moins -50°C/s.
  10. Procédé selon la revendication 9, caractérisé en ce que le refroidissement du produit s'effectue jusqu'à une température essentiellement inférieure à 100°C.
  11. Procédé selon l'une des revendications 4 à 10, caractérisé en ce que le produit est ensuite durci, en particulier en étant entreposé essentiellement pendant une durée de 1 à 3 heures, de préférence inférieure à deux heures, dans une plage de température comprise essentiellement entre 190°C et 210°C, de préférence dans une plage de température comprise essentiellement entre 200°C et 210°C et de préférence à une température essentiellement fixe dans la plage de température indiquée.
  12. Utilisation du procédé selon l'une des revendications 8 à 10 pour fabriquer un profilé extrudé pour la construction de châssis de véhicules.
EP09001885A 2008-02-20 2009-02-11 Alliage d'aluminium et procédé de fabrication d'un produit à partir d'un alliage d'aluminium Active EP2103701B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09001885T PL2103701T3 (pl) 2008-02-20 2009-02-11 Stop aluminiowy i sposób wytwarzania produktu ze stopu aluminiowego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008010157A DE102008010157A1 (de) 2008-02-20 2008-02-20 Aluminiumlegierung und Verfahren zur Herstellung eines Produkts aus einer Aluminiumlegierung

Publications (2)

Publication Number Publication Date
EP2103701A1 EP2103701A1 (fr) 2009-09-23
EP2103701B1 true EP2103701B1 (fr) 2010-06-09

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EP09001885A Active EP2103701B1 (fr) 2008-02-20 2009-02-11 Alliage d'aluminium et procédé de fabrication d'un produit à partir d'un alliage d'aluminium

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Country Link
EP (1) EP2103701B1 (fr)
AT (1) ATE470731T1 (fr)
DE (2) DE102008010157A1 (fr)
DK (1) DK2103701T3 (fr)
ES (1) ES2346828T3 (fr)
PL (1) PL2103701T3 (fr)
PT (1) PT2103701E (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013162374A1 (fr) 2012-04-25 2013-10-31 Norsk Hydro Asa Alliage d'aluminium al-mg-si à propriétés améliorées

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013525608A (ja) 2010-04-26 2013-06-20 サパ アーベー 階層状の微細構造を有する損傷耐性アルミ材
CN107675034B (zh) * 2017-09-18 2019-03-22 山东友升铝业有限公司 一种改善挤压型材粗晶用变形铝合金
CN113403509B (zh) * 2021-06-23 2022-11-08 上海嘉朗实业南通智能科技有限公司 一种高强度铝合金螺栓材料及其制备方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT71986B (de) * 1914-02-26 1916-06-26 Schwenningen Textilmaschf Pickerführung für Oberschlagwebstühle mit selbsttätiger Spulenauswechslung.
JPS56123346A (en) * 1980-02-29 1981-09-28 Showa Alum Corp Aluminum alloy for extrusion with superior hardenability
DE3243371A1 (de) * 1982-09-13 1984-03-15 Schweizerische Aluminium AG, 3965 Chippis Aluminiumlegierung
JPH11310841A (ja) * 1998-04-28 1999-11-09 Nippon Steel Corp 疲労強度に優れたアルミニウム合金押出形材およびその製造方法
US6630039B2 (en) * 2000-02-22 2003-10-07 Alcoa Inc. Extrusion method utilizing maximum exit temperature from the die
NO312597B1 (no) * 2000-11-08 2002-06-03 Norsk Hydro As En metode for tildannelse av formede produkter av en aluminiumslegering samt anvendelse av samme
CN1237195C (zh) * 2001-07-09 2006-01-18 克里斯铝轧制品有限公司 可焊高强度铝合金轧制产品及其制造方法
US7422645B2 (en) * 2005-09-02 2008-09-09 Alcoa, Inc. Method of press quenching aluminum alloy 6020

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013162374A1 (fr) 2012-04-25 2013-10-31 Norsk Hydro Asa Alliage d'aluminium al-mg-si à propriétés améliorées

Also Published As

Publication number Publication date
PL2103701T3 (pl) 2011-04-29
DE102008010157A1 (de) 2009-09-03
DE502009000030D1 (de) 2010-07-22
ATE470731T1 (de) 2010-06-15
DK2103701T3 (da) 2011-01-10
PT2103701E (pt) 2010-08-24
EP2103701A1 (fr) 2009-09-23
ES2346828T3 (es) 2010-10-20

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