EP1647607B1 - Alliage d'aluminium forgeable pour un échangeur de chaleur - Google Patents

Alliage d'aluminium forgeable pour un échangeur de chaleur Download PDF

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Publication number
EP1647607B1
EP1647607B1 EP05019503A EP05019503A EP1647607B1 EP 1647607 B1 EP1647607 B1 EP 1647607B1 EP 05019503 A EP05019503 A EP 05019503A EP 05019503 A EP05019503 A EP 05019503A EP 1647607 B1 EP1647607 B1 EP 1647607B1
Authority
EP
European Patent Office
Prior art keywords
weight
heat exchanger
aluminium alloy
maximum
copper
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
EP05019503A
Other languages
German (de)
English (en)
Other versions
EP1647607A1 (fr
Inventor
Norbert William Sucke
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.)
Erbsloeh Aluminium GmbH
Original Assignee
Erbsloeh Aluminium 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 claimed from DE200420015805 external-priority patent/DE202004015805U1/de
Priority claimed from DE200410049748 external-priority patent/DE102004049748A1/de
Application filed by Erbsloeh Aluminium GmbH filed Critical Erbsloeh Aluminium GmbH
Publication of EP1647607A1 publication Critical patent/EP1647607A1/fr
Application granted granted Critical
Publication of EP1647607B1 publication Critical patent/EP1647607B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/16—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes extruded
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12736—Al-base component
    • Y10T428/12764—Next to Al-base component

Definitions

  • the invention relates to an aluminum alloy which has a very high corrosion resistance and good forming properties. From such an aluminum alloy heat exchanger components can be produced, in particular heat exchanger hollow profiles or heat exchanger tubes, which are connected together with header pipes and fins by brazing to a heat exchanger.
  • Aluminum heat exchangers have found wide application, e.g. in vehicle construction, especially because of its light weight. Such a heat exchanger must have sufficient corrosion resistance and high heat exchange performance for its use in the automotive industry. For the production of the heat exchanger also good forming properties and sufficient strength of the aluminum material are important.
  • the object of the present invention is to provide an aluminum alloy, in particular for heat exchanger components, which has a high corrosion resistance with simultaneously improved forming properties for extrusion molding.
  • an aluminum alloy with minimal amounts of impurities of iron, silicon, zinc, chromium and zirconium. These impurities are already included in the base alloy. To keep these proportions as low as possible, a pure aluminum material with at least 99.85 wt% aluminum is used as the base material. This base material is made from virgin metal and usually contains no more than 0.06 wt% silicon and 0.06 wt% iron. To such a base alloy, the desired alloying components manganese, copper and titanium are added during casting. Titanium serves as a grain refining agent, with contents of 0.003 to 0.01% by weight of titanium being optimal.
  • Copper is added in% by weight of 0.15 to 0.5% by weight, preferably 0.2 to 0.4% by weight, particularly preferably 0.3% by weight of copper.
  • the amount of copper in the aluminum alloy per se does not improve the corrosion properties of the aluminum alloy. Only the occurring corrosion form is changed. If there is no copper or only very small amounts of copper are contained in the alloy, the aluminum alloy tends to pitting.
  • the proportions of copper in the alloys according to the invention lead, if corrosion phenomena should occur, to contact corrosion. This is in contrast to the occasional pitting corrosion on the entire surface uniformly distributed corrosion phenomenon that affects aluminum components to a much lesser extent negative. More than 0.5% by weight of copper should not be added to the alloy, otherwise the compressibility due to occurring AlCu phases deteriorates.
  • Manganese is a reinforcing component in the aluminum alloy and influences the mechanical properties. Very high manganese contents greater than 0.7% by weight, as in the prior art patent EP 866 746 give rise to larger precipitates in the alloy, which can then act as corrosion elements. In addition, aluminum alloys with high proportions of manganese are relatively poorly formable, ie, such an aluminum alloy can only be processed into profiles at a low pressing speed, which leads to a high level of tool wear, particularly in the case of the thin-walled heat exchanger components. Tests have shown that proportions by weight of from 0.2% by weight and greater to less than 0.7% by weight of manganese result in an aluminum alloy having sufficient strength with good formability.
  • a tested heat exchanger with multi-chamber hollow profiles made from an aluminum alloy according to the invention showed no signs of corrosion in a SWAAT test after 40 days.
  • the joining partners of the multi-chamber hollow profile in the aluminum heat exchanger namely the collector tubes and the fins made of an aluminum heat, which is less noble than the aluminum alloy according to the invention.
  • the aluminum material of the joining partners is an aluminum alloy with a weight fraction of zinc greater than 0.1% by weight, preferably 1 to 2% by weight and / or a weight fraction of copper of less than 0.15 wt%.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Forging (AREA)
  • Vehicle Body Suspensions (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Extrusion Of Metal (AREA)

Claims (9)

  1. Alliage d'aluminium forgeable présentant de bonnes caractéristiques de malléabilité et une très haute résistance à la corrosion, notamment une durée de vie supérieure à 40 jours dans des conditions du test SWAAT,
    fabriqué à partir d'un aluminium contenant au moins 99,85 % pondéraux d'aluminium, soit donc au maximum 0,15% pondéral d'impuretés inévitables, dont
    au maximum 0,1 % pondéral de fer,
    au maximum 0,1 % pondéral de silicium,
    au maximum 0,05 % pondéral de zinc,
    au maximum 0,01 % pondéral de chrome,
    au maximum 0,01 % pondéral de zirconium,
    par ajout de manganèse, cuivre et titane, de sorte à conférer à l'alliage d'aluminium la composition suivante:
    0,2 à moins de 0,7 % pondéral de manganèse,
    0,15 à 0,5 % pondéral de cuivre,
    0,003 à 0,01 % pondéral de titane,
    au maximum 0,15 % pondéral d'impuretés inévitables,
    le reste étant de l'aluminium.
  2. Alliage en aluminium selon la revendication 1, caractérisé en ce qu'il contient de préférence entre 0,4 et 0,6 % pondéraux de manganèse, et entre 0,2 et 0,4 % pondéraux de cuivre.
  3. Alliage en aluminium selon la revendication 2, caractérisé en ce qu'il contient 0,5 % pondéraux de manganèse et 0,3 % pondéraux de cuivre.
  4. Alliage en aluminium selon la revendication 1, caractérisé en ce qu'il contient au maximum 0,06 % pondéraux de fer.
  5. Composant d'échangeur thermique, en un alliage d'aluminium conforme à la revendication 1.
  6. Composant d'échangeur thermique selon la revendication 5, caractérisé en ce que l'on extrude ce composant à la presse pour lui conférer la forme d'un tube ou d'un profilé creux, de préférence d'un profilé creux plat multichambres.
  7. Échangeur thermique avec tubes collecteurs et lamelles, respectivement en un alliage à l'aluminium, et profilés creux pour échangeur thermique ou tubes d'échangeur thermique en alliage d'aluminium forgeable selon la revendication 1, les tubes collecteurs ou lamelles étant reliés par brasage dur avec les profilés creux de l'échangeur thermique ou avec les tubes de l'échangeur thermique,
    caractérisé en ce que les tubes collecteurs et/ou lamelles se composent d'un alliage à l'aluminium moins noble que les profilés creux d'échangeur thermique ou les tubes d'échangeur thermique.
  8. Échangeur thermique conformément à la revendication 7, caractérisé en ce que les tubes collecteurs et/ou les lamelles se composent d'un alliage d'aluminium contenant plus de 0,1 % pondéral de zinc, de préférence 1 à 2% pondéraux de zinc.
  9. Échangeur thermique selon les revendications 7 ou 8, caractérisé en ce que les tubes collecteurs et/ou les lamelles se composent d'un alliage d'aluminium contenant moins de 0,15% pondéral de cuivre.
EP05019503A 2004-10-13 2005-09-08 Alliage d'aluminium forgeable pour un échangeur de chaleur Active EP1647607B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200420015805 DE202004015805U1 (de) 2004-10-13 2004-10-13 Aluminiumlegierung
DE200410049748 DE102004049748A1 (de) 2004-10-13 2004-10-13 Aluminiumlegierung

Publications (2)

Publication Number Publication Date
EP1647607A1 EP1647607A1 (fr) 2006-04-19
EP1647607B1 true EP1647607B1 (fr) 2009-03-18

Family

ID=35106647

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05019503A Active EP1647607B1 (fr) 2004-10-13 2005-09-08 Alliage d'aluminium forgeable pour un échangeur de chaleur

Country Status (5)

Country Link
US (1) US20060088726A1 (fr)
EP (1) EP1647607B1 (fr)
AT (1) ATE426049T1 (fr)
DE (1) DE502005006868D1 (fr)
DK (1) DK1647607T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007142261A1 (fr) * 2006-06-06 2007-12-13 Mitsubishi Materials Corporation Substrat de montage d'élément de puissance et son procédé de fabrication, unité de montage d'élément de puissance et son procédé de fabrication, et module de puissance
US20080041501A1 (en) * 2006-08-16 2008-02-21 Commonwealth Industries, Inc. Aluminum automotive heat shields

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5286316A (en) * 1992-04-03 1994-02-15 Reynolds Metals Company High extrudability, high corrosion resistant aluminum-manganese-titanium type aluminum alloy and process for producing same
FR2816534B1 (fr) * 2000-11-16 2003-01-31 Pechiney Rhenalu Procede de fabrication d'une bande plaquee en alliage d'aluminium pour la fabrication d'echangeurs de chaleur brases
US6923876B2 (en) * 2000-11-16 2005-08-02 Pechiney Rhenalu Aluminum alloy strip manufacturing process for the manufacture of brazed heat exchangers
JP2003082428A (ja) * 2001-09-12 2003-03-19 Furukawa Electric Co Ltd:The 溶接部の耐食性に優れるアルミニウム合金ブレージングシート
JP3756439B2 (ja) * 2001-10-10 2006-03-15 三菱アルミニウム株式会社 熱交換器用高強度高耐食性アルミニウム合金押出材及びその製造方法並びに熱交換器
FR2832497B1 (fr) * 2001-11-19 2004-05-07 Pechiney Rhenalu Bandes en alliage d'aluminium pour echangeurs thermiques
AU2004207223A1 (en) * 2003-01-27 2004-08-12 Showa Denko K.K. Heat exchanger and process for fabricating same

Also Published As

Publication number Publication date
US20060088726A1 (en) 2006-04-27
DK1647607T3 (da) 2009-06-02
DE502005006868D1 (de) 2009-04-30
EP1647607A1 (fr) 2006-04-19
ATE426049T1 (de) 2009-04-15

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