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
• • 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.
• 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 taken into account in order to achieve the desired mechanical properties
• aluminum alloys of type AA 5xxx have electrical conductivities in the range of 15 to 25 ms / m, so that - - These in turn are not ideal for use in electrically conductive products.
• the present invention has the object to provide an aluminum alloy, which has the necessary mechanical properties and yet has an improved electrical conductivity.
• the object indicated is achieved by an aluminum alloy containing the following alloy constituents in wt. -% having :
• Alloy components in the aluminum alloy must be increased so that the aluminum alloy has as few alloy components in the aluminum matrix in a dissolved state.
• Aluminum alloy composition is achieved that the precipitation of intermetallic phases in the form of
• Al (Fe, Mn) Si ternary phases in the form of, for example, AlFeSi and binary phases, for example in the form of Mg 2 Si at
• the proportions of Si, Fe, Mn and Mg are between 0.25% by weight to 0.7% by weight in order to ensure the desired mechanical properties of the aluminum alloy.
• the aluminum alloy according to the invention is characterized in that the following applies to the proportions of Si, Fe, Mn and Mg:
• the copper content of ⁇ 0.1 wt. -% additionally improves that
• this narrow corridor also applies to the alloying constituents Fe, Mn and Mg among themselves, i. in addition:
• the aluminum alloy has the following alloy components in weight. -% on:
• Alloy components of the alloy components Si, Fe, Mn and Mg applies:
• the aluminum alloy according to the invention can be further improved with regard to its electrical conductivity by virtue of the fact that, for the alloy components, the
• Alloy components Si, Fe, Mn and Mg are:
• 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.
• Construction parts are usable.
• 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 to one
• Aluminum alloy exist, 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 P o, 2 of more than 140 MPa and an electrical conductivity of more than 31 MS / m,
• Aluminum ingot is homogenized, the ingot for a period of 2 - 12 hours at 550 ° C to 610 ° C, 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 one
• Homogenization precipitation degree 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
• Hot strip annealing which is carried out at relatively low temperatures of 280 ° C - 380 ° C. Here, too, it is attempted to pass over the moderate temperatures no further large amounts of alloy components in solution. At this solution state, in principle, nothing changes even by the final cold rolling to final thickness, so that a band produced in this way has very good electrical and mechanical properties.
• 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.
• insects are usually for the division of the mechanical
• 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
• Table 1 shows two aluminum alloys according to the invention with their alloy constituents in wt. -% specified.
• the alloys A and B are very similar and differ only significantly in the titanium content. According to the in the
• alloy examples A and B also fulfill the equations:
• 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 thus produced was cold rolled to a thickness of 2.0 mm with and without intermediate annealing and annealed with various
• the tapes produced from it were in a
• Elongation at break and electrical conductivity vary greatly.
• the yield strength of the manufactured according to the variant I and I I sheets was still more than 140 MPa, while the elongation at break and the electrical
• 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. As was to be expected, it changed more and more
• the hot strips already achieve very high values for the electrical conductivity.
• cathode sheets for zinc electrolysis can therefore only by hot rolling and thus very inexpensively from the inventive
• Aluminum alloys are particularly noticeable if good mechanical and very good electrical
• Connectors 1 are two live cables or Rails 2a, 2b connected electrically conductive.
• the connectors 1 need a good mechanical
• FIG. 2 shows an exemplary embodiment of FIG
• the illustrated electrical board 3 for example, a motor vehicle.
• the tracks 4 the part of a
• Circuitry are made of the invention according to the invention aluminum alloy and thus provide the necessary
• Fig. 3 shows in a perspective view a
• Electrode plate 5 which, for example, in the
• Zinkelelektroolyse can be used and from the
• a cathode plate holder 5a is also 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.
• a cable 6 and a ribbon cable 7 whose head 6a and 7a from 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)

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• 2011
  • 2011-05-27 ES ES11167951.0T patent/ES2461994T3/es active Active
  • 2011-05-27 PT PT111679510T patent/PT2527479E/pt unknown
  • 2011-05-27 DK DK11167951.0T patent/DK2527479T3/da active
  • 2011-05-27 PL PL11167951T patent/PL2527479T3/pl unknown
  • 2011-05-27 EP EP11167951.0A patent/EP2527479B1/de active Active
• 2012
  • 2012-05-24 WO PCT/EP2012/059651 patent/WO2012163774A1/de not_active Ceased
• 2014
  • 2014-05-09 HR HRP20140423AT patent/HRP20140423T1/hr unknown

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