EP2527479B1 - Alliage d'aluminium hautement conducteur pour produits conducteurs électriques - Google Patents

Alliage d'aluminium hautement conducteur pour produits conducteurs électriques Download PDF

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Publication number
EP2527479B1
EP2527479B1 EP11167951.0A EP11167951A EP2527479B1 EP 2527479 B1 EP2527479 B1 EP 2527479B1 EP 11167951 A EP11167951 A EP 11167951A EP 2527479 B1 EP2527479 B1 EP 2527479B1
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EP
European Patent Office
Prior art keywords
aluminium alloy
temperature
alloy
strip
electrically conductive
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
EP11167951.0A
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German (de)
English (en)
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EP2527479A1 (fr
Inventor
Olaf Dr. Engler
Simon Dr. Jupp
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.)
Speira GmbH
Original Assignee
Hydro Aluminium Rolled Products GmbH
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
Priority to PL11167951T priority Critical patent/PL2527479T3/pl
Priority to PT111679510T priority patent/PT2527479E/pt
Priority to EP11167951.0A priority patent/EP2527479B1/fr
Priority to DK11167951.0T priority patent/DK2527479T3/da
Priority to ES11167951.0T priority patent/ES2461994T3/es
Application filed by Hydro Aluminium Rolled Products GmbH filed Critical Hydro Aluminium Rolled Products GmbH
Priority to PCT/EP2012/059651 priority patent/WO2012163774A1/fr
Publication of EP2527479A1 publication Critical patent/EP2527479A1/fr
Application granted granted Critical
Publication of EP2527479B1 publication Critical patent/EP2527479B1/fr
Priority to HRP20140423AT priority patent/HRP20140423T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/023—Alloys based on aluminium

Definitions

  • the invention relates to an aluminum alloy for electrically conductive products, the use of the aluminum alloy, a strip or sheet produced from the aluminum alloy according to the invention and a method for producing a strip or sheet.
  • Aluminum or aluminum alloys are also used for electrically conductive or current-carrying products, since aluminum or the aluminum alloys have a good electrical conductivity.
  • the electrical conductivity ⁇ in high-purity aluminum is about 36.5 MS / m.
  • Highly pure aluminum is, however, as Construction material is not suitable because it often does not meet the required mechanical properties, such as a desired strength or yield strength. If mechanical properties are also required for electrically conductive or current-carrying products, for example, a significant reduction in the electrical conductivity must be accepted in order to provide the desired mechanical properties.
  • the cost of high purity aluminum is very high, so that correspondingly manufactured pure aluminum products are relatively expensive to manufacture.
  • the present invention has the object to provide an aluminum alloy, which has the necessary mechanical properties and yet has an improved electrical conductivity.
  • advantageous uses and a method for producing an existing of the aluminum alloy strip or sheet are proposed.
  • Fe, Si, Mn and Mg content of the aluminum alloy are then in an extremely narrow corridor and therefore lead to a particularly preferred formation of the intermetallic, precipitated phases.
  • the use of the aluminum alloy according to the invention for electrically conductive or current-carrying products is particularly advantageous.
  • the aluminum alloy according to the invention can also provide good mechanical properties in addition to the very good electrical conductivity, so that corresponding products can also be used as construction parts.
  • the aluminum alloy according to the invention is used for an electrically conductive part of a circuit arrangement, a conductor track, an electrically conductive connector, an electrical circuit board, a cable, a ribbon cable or an electrode sheet. All uses have in common that these on the one hand require very good electrical conductivities in order to have the lowest possible electrical resistance.
  • the electrically conductive parts of a circuit so as well as conductors, connectors, circuit boards, cables, ribbon cables but also electrode plates requirements for the mechanical To meet properties that are not reached by highly conductive pure aluminum. Consequently, highly conductive products that can be used in the construction and that at least partially consist of the aluminum alloy according to the invention can also be provided.
  • the object is achieved by a band or sheet consisting of an aluminum alloy according to the invention, wherein the strip or sheet after annealing at 250 ° C for 1-4 hours, a yield strength R P0.2 of more than 140 MPa and an electrical conductivity of more than 31 MS / m, preferably more than 31.5 MS / m at room temperature.
  • the outstanding properties with very high electrical conductivity and yet good yield strength make it possible to use the strip or sheet for a wide variety of uses, such as those mentioned above, while at the same time providing extremely low electrical resistances during current conduction.
  • a method of making a strip or sheet of aluminum alloy according to the invention wherein a billet of a corresponding aluminum alloy is produced, the billet for a period of 2-12 hours at 550 ° C to 610 ° C is homogenized, cooled to a temperature of 380 ° C - 500 ° C and held at this temperature for at least one hour, the ingot is then hot rolled at a temperature of 280 ° C - 500 ° C and optionally a hot strip annealing at a Temperature of 280 ° C - 380 ° C for more than an hour and then subjected optionally cold rolled to final thickness.
  • the degree of precipitation which occurs during the homogenization is improved by cooling to a temperature of 380 ° C.-500 ° C. immediately after homogenization.
  • the hot rolling temperatures of 280 ° C - 500 ° C are compared to the usual hot rolling temperatures, which up to max. 550 ° C, slightly reduced. This is intended to ensure that the hot rolling does not change alloy constituents into solutions again, but rather remains in the precipitated state. Due to the state of precipitation, the hot strip produced in this way has very high conductivities and can therefore be used cost-effectively for the production of cathode sheets.
  • the ingot may be cooled to room temperature and reheated to a temperature of 380 ° C - 520 ° C prior to hot rolling.
  • This facilitates the logistics in the production of the tapes, without causing any significant loss of mechanical or electrical properties.
  • the moderate temperatures mean that alloyed constituents present in a precipitated state do not go into solution again.
  • one or more intermediate anneals are performed during the cold rolling at a temperature of 300 ° C - 450 ° C for one hour to 4 hours. Intermediate anneals are usually performed to adjust the mechanical properties of the cold rolled strip to final thickness.
  • the method according to the invention can be further developed by subjecting the finished rolled strip to a re-annealing at a temperature of 200 ° C.-350 ° C. for at least one hour.
  • the annealing in this temperature range not only significantly improves the mechanical formability of the strip, but also supports the formation of precipitated intermetallic phases.
  • the electrical conductivity can be increased again in the strip according to the invention by a
  • FIGS. 1 to 5 schematically exemplary embodiments of advantageous uses of the aluminum alloy according to the invention.
  • the alloy examples A and B were then made with two different methods according to variants I and II into strips and then into sheets, the variant I differs from the variant II in particular by the preparation of the rolling ingot and hot rolling.
  • the ingot was homogenized for 4 hours at 550 ° C - 610 ° C and then kept for 2 hours at 400 ° C - 500 ° C and fed to the hot rolling.
  • a homogenization for 12 hours at 550 ° C - 610 ° C was performed, the ingot then cooled to room temperature and heated to 400 ° C before hot rolling to 400 °.
  • the ingot was then hot rolled in both variants to a hot strip thickness of 7.5 mm. Subsequently, a hot strip annealing at a temperature of 300 ° C - 350 ° C for more than one hour instead.
  • the hot strip produced in this way was cold rolled to a thickness of 2.0 mm with and without intermediate annealing and fed to a annealing at various temperatures.
  • the annealing temperatures were 200 ° C, 250 ° C, 300 ° C and 350 ° C in the different experiments.
  • Variant I Variant II Homogenize for 4 h at 550-610 ° C, hold for 2 h at 400 ° C to 500 ° C, feeding the hot rolling Homogenize for 12 h at 550 ° C to 610 ° C, allow to cool to room temperature, warm bars to 400 ° C to 500 ° C before hot rolling Hot rolling to 7.5 mm Hot strip annealing at 300 ° C to 350 ° C Cold rolling to 2.0 mm with / without intermediate annealing Annealing at a temperature of 200 ° C, 250 ° C, 300 ° C and 350 ° C
  • the yield strength the sheets produced according to variants I and II about 40 MPa.
  • the conductivity values could be significantly increased by the annealing, but even in the hard-rolled state they are significantly higher than those of conventional aluminum alloys, which are in the range between 15 and 29 MS / m.
  • the electrical conductivity of more than 30 MS / m is close to the values of high-purity aluminum.
  • the increasing annealing temperature in particular with decreasing yield strength, changed the breaking elongation A 80 mm , which increased to a value of 37.5% -40 %.
  • it was found that apart from the increase in the electrical conductivity ⁇ can be provided with increasing annealing temperatures, regardless of the set mechanical properties very high electrical conductivities above 30 MS / m.
  • the hot strips already achieve very high values for the electrical conductivity.
  • cathode sheets for zinc electrolysis can therefore only be produced by hot rolling and thus very cost-effectively from the aluminum alloy according to the invention.
  • the special properties of the aluminum alloy according to the invention are particularly noticeable if good mechanical and very good electrical conductivity properties are required.
  • FIG. 1 schematically illustrated connector 1 of the case.
  • the connectors 1 require a good mechanical strength in order to form a sufficiently secure connection to the cables or rails 2a, 2b and at the same time the lowest possible electrical resistance.
  • FIG. 2 Another embodiment of an advantageous use of the aluminum alloy according to the invention shows Fig. 2 ,
  • Fig. 2 an embodiment of an electrical circuit board 3, for example, of a motor vehicle is shown.
  • the printed conductors 4, which are part of a circuit arrangement, consist of the aluminum alloy according to the invention and thus provide the necessary strength of the printed circuit board.
  • the significantly improved compared to high-purity aluminum strength facilitates the production of such boards due to the improved handling of the tracks 4, since they have a higher strength.
  • Fig. 3 shows in a perspective view of an electrode sheet 5, which can be used for example in the zinc electrolysis and consists of the aluminum alloy according to the invention.
  • a cathode plate holder 5a is shown schematically, but usually consists of a different aluminum alloy.
  • the electrode sheet 5 thus has the necessary mechanical stability and allows a reduced electrical resistance in the zinc electrolysis.
  • the show 4 and 5 a cable 6 or a ribbon cable 7, the conductors 6a and 7a of the consist of aluminum alloy according to the invention.
  • cable 4 or ribbon cable 5 must meet mechanical requirements, which are readily met by the use of aluminum alloy according to the invention.
  • the use of the aluminum alloy according to the invention represents a cost-effective replacement of high-purity aluminum in the cables.

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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)
  • Conductive Materials (AREA)

Claims (11)

  1. Alliage d'aluminium destiné à des produits électriquement conducteurs, comportant les composants d'alliage selon leurs pourcentages en poids :
    0,25 % ≤ Si ≤ 0,7 %,
    0,25 % ≤ Fe ≤ 0,7 %,
    Cu < 0,1 %,
    0,25 % ≤ Mn ≤ 0,7 %,
    0,25 % ≤ Mg ≤ 0,7 %,
    Cr ≤ 0,1 %,
    Zn ≤ 0,1 %,
    Ti ≤ 0,1 %,
    le reste étant de l'Al et des impuretés inévitables dont chacune représente au maximum 0,05 %, leur somme représentant au maximum 0,15 %,
    les proportions d'alliage des composants d'alliage Si, Fe, Mn et Mg remplissant les conditions suivantes :
    | [Si%] - [Fe%] | ≤ 0,1 % et
    | [Si%] - [Mn%] | ≤ 0,1 % et
    | [Si%] - [Mg%] | ≤ 0,1 %.
  2. Alliage d'aluminium selon la revendication 1, caractérisé en ce que
    ledit alliage d'aluminium comporte les composants d'alliage suivants selon leurs pourcentages en poids
    0,4 % ≤ Si ≤ 0,6 %,
    0,4 % ≤ Fe ≤ 0,6 %,
    Cu < 0,05 %,
    0,4 % ≤ Mn ≤ 0,6 %,
    0, 4 % ≤ Mg ≤ 0,6 %,
    Cr ≤ 0,1 %,
    Zn ≤ 0,05 %,
    Ti ≤ 0,05 %,
    le reste étant de l'Al et des impuretés inévitables dont chacune représente au maximum 0,05 %, leur somme représentant au maximum 0,15 %,
    les proportions d'alliage des composants d'alliage Si, Fe, Mn et Mg remplissant les conditions suivantes :
    | [Si%] - [Fe%] | ≤ 0,1 % et
    | [Si%] - [Mn%] | ≤ 0,1 % et
    | [Si%] - [Mg%] | ≤ 0,1 %.
  3. Alliage d'aluminium selon les revendications 1 ou 2,
    caractérisé en ce que
    la teneur en Si est supérieure à la teneur en Mg.
  4. Alliage d'aluminium selon l'une des revendications 1 à 3,
    caractérisé en ce que
    les proportions d'alliage des composants d'alliage Si, Fe, Mn et Mg remplissent les conditions suivantes :
    | [Si%] - [Fe%] | ≤ 0,05 % et
    | [Si%] - [Mn%] | ≤ 0,05 % et
    | [Si%] - [Mg%] | ≤ 0,05 %.
  5. Utilisation d'un alliage d'aluminium selon l'une des revendications 1 à 4 pour des produits électriquement conducteurs ou conduisant un courant électrique.
  6. Utilisation selon la revendication 5,
    caractérisée en ce que l'on utilise ledit alliage d'aluminium pour une pièce électriquement conductrice d'un ensemble de circuits, un tracé conducteur, un connecteur enfichable électriquement conducteur, une platine électrique, un câble, un câble plat ou une tôle à électrodes.
  7. Bande ou tôle constituée d'un alliage d'aluminium selon l'une des revendications 1 à 4,
    caractérisée en ce que
    ladite bande ou tôle présente, suite à un recuit à 250 °C pendant 1 à 4 heures, une limite d'élasticité Rp0,2 supérieure à 140 MPa et une conductivité électrique supérieure à 31 MS/m, de préférence supérieure à 31,5 MS/m, à température ambiante.
  8. Procédé de fabrication d'une bande constituée d'un alliage d'aluminium selon l'une des revendications 1 à 4, consistant à fabriquer un lingot à partir d'un alliage d'aluminium correspondant, à soumettre ledit lingot à une homogénéisation réalisée entre 550 °C et 610 °C pendant une durée comprise entre 2 h et 12 h, à la refroidir à une température comprise entre 380 °C et 500 °C et à la maintenir à cette température pendant au moins 1 h, le lingot étant ensuite soumis à un laminage à chaud réalisé à une température comprise entre 280 °C et 500 °C et, optionnellement, à un recuit sous forme de bande chaude réalisé à une température comprise entre 280 °C et 380 °C pour une durée supérieure à 1 h et ensuite, optionnellement, à un laminage à froid permettant d'atteindre l'épaisseur finale.
  9. Procédé selon la revendication 8,
    caractérisé en ce que,
    en variante, ledit lingot est refroidi à température ambiante suite à l'homogénéisation et réchauffé à une température comprise entre 380 °C et 520 °C avant le laminage à chaud.
  10. Procédé selon les revendications 8 ou 9,
    caractérisé en ce que,
    pendant le laminage à froid, on réalise un ou plusieurs recuits intermédiaires à une température comprise entre 300 °C et 450 °C pendant une durée comprise entre 1 h et 4 h.
  11. Procédé selon l'une des revendications 8 à 10, ladite bande étant soumise, après toutes les étapes de laminage, à un recuit réalisé à une température comprise entre 200 °C et 350 °C pendant au moins 1 h.
EP11167951.0A 2011-05-27 2011-05-27 Alliage d'aluminium hautement conducteur pour produits conducteurs électriques Active EP2527479B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
PT111679510T PT2527479E (pt) 2011-05-27 2011-05-27 Liga de alumínio altamente condutora para produtos eletricamente condutores
EP11167951.0A EP2527479B1 (fr) 2011-05-27 2011-05-27 Alliage d'aluminium hautement conducteur pour produits conducteurs électriques
DK11167951.0T DK2527479T3 (da) 2011-05-27 2011-05-27 Højtledende aluminiumlegering til elektrisk ledende produkter
ES11167951.0T ES2461994T3 (es) 2011-05-27 2011-05-27 Aleación de aluminio altamente conductora para productos eléctricamente conductores
PL11167951T PL2527479T3 (pl) 2011-05-27 2011-05-27 Wysokoprzewodzący stop aluminium do produktów przewodzących elektryczność
PCT/EP2012/059651 WO2012163774A1 (fr) 2011-05-27 2012-05-24 Alliage d'aluminium très conducteur pour produits électroconducteurs
HRP20140423AT HRP20140423T1 (hr) 2011-05-27 2014-05-09 Visoko vodljiva aluminijska legura za elektriäśki vodljive proizvode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11167951.0A EP2527479B1 (fr) 2011-05-27 2011-05-27 Alliage d'aluminium hautement conducteur pour produits conducteurs électriques

Publications (2)

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EP2527479A1 EP2527479A1 (fr) 2012-11-28
EP2527479B1 true EP2527479B1 (fr) 2014-02-12

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EP (1) EP2527479B1 (fr)
DK (1) DK2527479T3 (fr)
ES (1) ES2461994T3 (fr)
HR (1) HRP20140423T1 (fr)
PL (1) PL2527479T3 (fr)
PT (1) PT2527479E (fr)
WO (1) WO2012163774A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2871642B1 (fr) * 2013-11-06 2019-08-28 Airbus Defence and Space GmbH Interconnecteur de cellule solaire et son procédé de fabrication
CN103556016B (zh) * 2013-11-19 2017-09-22 沈阳工业大学 一种中强度高导电率电工铝导线材料及其制备方法
EP2924135B1 (fr) 2014-03-28 2017-12-13 Hydro Aluminium Rolled Products GmbH Procédé pour la fabrication d'une bande d'un alliage d'aluminium à fermeté moyenne hautement déformable pour la fabrication de produits semi-finis ou de composants de véhicules automobiles
DE102018115850B3 (de) 2018-06-29 2019-10-02 Hydro Aluminium Rolled Products Gmbh Verfahren zur Herstellung eines Aluminiumbands mit hoher Festigkeit und hoher elektrischer Leitfähigkeit
CN115198213B (zh) * 2022-08-10 2022-12-13 华南理工大学 一种调控铝合金电导率与力学性能的复合形变热处理方法
CN115612899B (zh) * 2022-09-28 2023-07-18 国网河南省电力公司电力科学研究院 一种高导电、抗疲劳铝合金导体材料及其制备方法
WO2024208921A1 (fr) * 2023-04-04 2024-10-10 Speira Gmbh Produit laminé constitué d'aluminium pour un logement d'élément de batterie

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JPH0637681B2 (ja) * 1990-09-20 1994-05-18 住友軽金属工業株式会社 ろう付け後熱伝導度および犠牲陽極効果にすぐれた熱交換器用アルミニウム合金フィン材
JP3378819B2 (ja) * 1999-01-18 2003-02-17 古河電気工業株式会社 Ａｌ合金製自動車用導電体
JP4174526B2 (ja) * 2006-05-18 2008-11-05 株式会社神戸製鋼所 アルミニウム合金厚板の製造方法およびアルミニウム合金厚板

Also Published As

Publication number Publication date
EP2527479A1 (fr) 2012-11-28
WO2012163774A1 (fr) 2012-12-06
DK2527479T3 (da) 2014-05-05
PL2527479T3 (pl) 2014-08-29
ES2461994T3 (es) 2014-05-22
HRP20140423T1 (hr) 2014-06-20
PT2527479E (pt) 2014-05-13

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