US20180326540A1 - Brazing sheet and production method - Google Patents

Brazing sheet and production method Download PDF

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US20180326540A1
US20180326540A1 US15/775,447 US201615775447A US2018326540A1 US 20180326540 A1 US20180326540 A1 US 20180326540A1 US 201615775447 A US201615775447 A US 201615775447A US 2018326540 A1 US2018326540 A1 US 2018326540A1
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brazing sheet
alloy
cladding
brazing
core
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Sampath Desikan
Ma WEIZENG
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Granges AB
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Granges AB
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B23K35/286—Al as the principal constituent
    • B23K35/288—Al as the principal constituent with Sn or Zn
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • B23K1/0012—Brazing heat exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
    • B23K35/0233—Sheets, foils
    • B23K35/0238—Sheets, foils layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B23K35/286—Al as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/016—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of aluminium or aluminium alloys
    • 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
    • C22C21/02—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
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C22C21/04—Modified aluminium-silicon alloys
    • 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
    • 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
    • C22F1/043—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 silicon 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
    • 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
    • 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
    • F28F21/089—Coatings, claddings or bonding layers made from metals or metal alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001—Aluminium or its alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/14—Heat exchangers
    • 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 present invention relates to an aluminium alloy brazing sheet with adequate corrosion performance at thin gauge and a process for its production.
  • the invention further relates to use of the brazing sheet for the manufacturing of a brazed heat exchanger and a brazed heat exchanger made from the brazing sheet.
  • Brazed aluminium heat exchangers such as radiators, condensers, evaporators etc. are commonly used in automotive engine cooling or air conditioning systems as well as in industrial cooling systems. They usually include of a number of parallel tubes (welded/folded/multi chamber etc.) with each tube joined typically at either end to headers. Corrugated fins brazed to the tubes separate any two adjacent tubes and transfer heat between the tube walls to a gaseous medium outside the tubes, such as ambient air.
  • the prior art discloses use of a sacrificial cladding of a less noble aluminium alloy on the inside of the tubes.
  • a cladding usually contains Zn in order to lower the corrosion potential (i.e. rendering it more negative).
  • Examples of disclosures of these kind of materials include WO2007/042206 A1, WO2007/131727 A1, WO2010/132018 A1, EP2418042 A1, EP1666190 A1, EP2130934 A1, JP2003268470 A, JP2005232506 A, JP2007216283 A, JP2008127607 A, U.S. Pat. No. 8,932,728 B2, US2010/0291400 A1 and US2011/0287277 A1.
  • a core of a so called long life alloy having very low content of Si, may be used to enable the formation of a sacrificial “brown band” at brazing.
  • the proportion of recycled scrap that can be used is limited, which is disadvantageous from a sustainability point of view.
  • Improved corrosion resistance can also be achieved by including a further layer between the core and the sacrificial cladding, but such brazing sheets are more complicated to produce.
  • a brazing sheet comprising a core layer made of a first aluminium alloy, attached to one side of said core layer a sacrificial cladding made of a second aluminium alloy, attached to the other side of said core layer a braze cladding made of a third aluminium alloy, wherein said first aluminium alloy consists of:
  • said second aluminium alloy consists of: Si 0.45-1.0 wt %; Fe ⁇ 0.4 wt %; Cu ⁇ 0.05 wt %; Mn 1.2-1.8 wt %; Ti ⁇ 10 wt %, Zn 1.3-5.5 wt %; Zr 0.05-0.20 wt %; other elements ⁇ 0.05 wt % each and ⁇ 0.2 wt % in total; Al balance up to 100 wt %; and,
  • said third aluminium alloy has a melting point lower than said first and second aluminium alloys.
  • the liquidus temperature of the third aluminium alloy is lower than the solidus temperatures of the first and of the second aluminium alloys.
  • Other elements refer to any elements present as impurities. Such elements are difficult to avoid due to impurities in the raw materials used for making the alloys, particularly when significant amounts of recycled scrap is used as is the normal practice in full scale production. Such elements may, for example, include impurities of one or more of V, Ni, Sr, etc.
  • sheet as used herein also include coiled strips.
  • Properties after brazing refer to properties of the brazing sheet, or any article made by shaping the brazing sheet, after it has been brazed at a temperature of 600° C. for 3 minutes.
  • the brazing sheet of the invention is particularly suitable as a tube stock material with the sacrificial cladding forming the inside of the tubes made from the brazing sheet.
  • the brazing sheet is preferably a three layer material with no further layers in addition to the core, the sacrificial cladding and the braze cladding.
  • the total thickness of the brazing sheet is preferably from 0.15 to 0.6 mm, more preferably from 0.15 to 0.25 mm and most preferably from 0.18 to 0.22 mm.
  • the sacrificial cladding constitutes from 3 to 20%, more preferably from 4 to 15% and most preferably from 5 to 12% of the total thickness of the brazing sheet.
  • the braze cladding constitutes from 3 to 20%, most preferably from 5 to 15% of the total thickness of the brazing sheet.
  • the special combination of the composition of the core alloy (i.e. the first aluminium alloy) and the composition of the sacrificial cladding alloy (i.e. the second aluminium alloy) enables production from material with high proportion of scrap, particularly scrap containing Si and Fe, at the same time as, after brazing, acceptable resistance against corrosion attacks from both sides of a tube made from the brazing sheet is achieved.
  • the brazing sheet of the invention thus has adequate protection against corrosion in spite of the fact that the Si and Mn content in the core alloy preferably are set so no sacrificial brown band (an area of the core close to the interface against the braze cladding comprising Mn and Si containing particles formed by penetration of Si from the braze cladding through solid solution) is formed at brazing. It is also possible to produce the brazing sheet by rolling without increased risk for bending in the rolling line caused by too high differences in deformation resistance between the layers.
  • the core contains intermetallic particles comprising Cr, particularly particles also comprising Al, Fe, Mn and Cu.
  • the residual braze cladding contains intermetallic particles comprising Cr, particularly particles also comprising Al, Fe, Mn and Cu.
  • Intermetallic particles referred to above preferably have an average mean equivalent diameter in the range from 0.5 to 10 ⁇ m. It could have been expected that AlFeCuMn particles would create a potential difference increasing the corrosion. However, it has been found that the material of the invention, comprising Cr containing particles, shows improved resistance to particularly pitting corrosion.
  • the brazing sheet Before brazing, the brazing sheet has good formability so that different designs of brazed and/or folded tubes can be made, such as B-type or multi-port tubes.
  • the core alloy comprises 0.2-1.0 wt %, preferably >0.2-1.0 wt % (i.e. from more than 0.2 up to 1.0 wt %) of Si. Most preferably the content of Si is 0.25-1.0 wt %, particularly 0.3-1.0 wt %.
  • the comparatively high amount of Si means that no sacrificial brown band is formed at brazing.
  • the core alloy comprises 0.15-0.9 wt %, preferably >0.2-0.7 wt % (i.e. from more than 0.2 up to 0.7 wt %) of Fe.
  • the specified content of Fe enables use of comparatively high amounts of scrap contaminated with Fe. Too high content of Fe leads to formation of large intermetallic particles.
  • the core alloy comprises 0.2-1.0 wt %, preferably 0.4-0.8 wt % of Cu.
  • the presence of Cu increases the strength and increases the corrosion potential.
  • too high content of Cu increases the sensitivity to hot cracking during casting, lowers the solidus temperature and may also increase the susceptibility of the materials to intergranular corrosion after brazing.
  • the core alloy comprises 1.0-1.6 wt %, preferably 1.1-1.5 wt % of Mn.
  • Mn in the core increases the strength, particularly when present in particles but to some extent also in solid solution.
  • a sufficiently high Mn content in the core a large number of particles can be precipitated during preheating and subsequent hot rolling during production of the brazing sheet, and after brazing a substantial potential gradient between the core and sacrificial cladding can be obtained because of the large difference of Mn in solid solution. Too high content of Mn may lead to large primary particles being formed during casting, which is undesirable in the manufacture of thin material.
  • the core alloy comprises ⁇ 0.3 wt %, preferably ⁇ 0.2 wt % of Mg, most preferably ⁇ 0.15 wt %, e.g. 0.05-0.15 wt % of Mg.
  • the presence of magnesium improves the strength of the material, but at too high amounts the brazeability is worsened, particularly when using flux at controlled atmosphere brazing (CAB), such as in the NocolocTM method.
  • CAB controlled atmosphere brazing
  • the core alloy comprises 0.05-0.15 wt %, preferably 0.06-0.13 wt % of Cr. It has been found that Cr, after brazing, is included not only in intermetallic particles in the core, but preferably also in resolidified material from the braze cladding. The presence of intermetallic Cr containing particles has been found improving the resistance against corrosion. Too high amount of Cr leads to undesirable giant primary intermetallic particles adversely affecting the hot rolling behaviour of the materials.
  • the core alloy comprises 0.05-0.25 wt %, preferably 0.06-0.15 of Zr.
  • the presence of Zr causes an increased number of very fine particles, promoting development of relatively large elongated grains after brazing, which is beneficial for the corrosion resistance. Too high content of Zr leads to large intermetallic particle formation during casting and thereby loss of the beneficial role of Zr.
  • the core alloy comprises 0.05-0.25 wt %, preferably 0.06-0.15 wt % of Ti.
  • the presence of Ti improves the corrosion resistance by promoting layer-by-layer corrosion. Too high content of Ti leads to giant intermetallic particle formation during casting, rendering the role of Ti ineffective.
  • the sacrificial cladding (i.e. the second aluminium alloy) comprises 1.3-5.5 wt %, preferably 1.5-5.0 wt %, most preferably 2.0-3.0 wt % of Zn.
  • Relatively high content of Zn is beneficial for protection against corrosion from the inside of tubes. Although high amounts of Zn may lead to increased migration of Zn into the core and making it more sensitive to corrosion from the outside, it has been found that the brazing sheet of the invention still has adequate protection against corrosion from the outside. If the content of Zn is too low the sacrificial cladding will not provide sufficient protection of the core against corrosion from the inside of tubes. Too high content of Zn decreases the melting point and can potentially also make the material more brittle and cause problems during rolling. Further, the corrosion rate may become too high.
  • the sacrificial cladding comprises 0.45-1.0 wt %, preferably 0.55-1.0 wt %, most preferably 0.65-0.90 wt % of Si.
  • the presence of Si improves the strength of the cladding material by reacting with Mn. If the Si content is too low the number of AlMnSi dispersoids formed is insufficient for improving the strength to a desired level. Further, too low content of Si decreases the amount of recycled scrap that can be used for the production. Too high content of Si is undesired as it lowers the melting point of the cladding.
  • the sacrificial cladding comprises ⁇ 0.4 wt %, preferably ⁇ 0.3 wt % of Fe.
  • the presence of small amounts of Fe cannot be avoided in practice since it is usually included as an impurity in the raw materials. Too high content of Fe leads to lower corrosion resistance of the sacrificial cladding material.
  • the sacrificial cladding comprises ⁇ 0.05 wt % of Cu.
  • the acceptable content of Cu must be low to avoid extensive pitting of the sacrificial cladding material.
  • the sacrificial cladding comprises 1.2-1.8 wt %, preferably 1.4-1.8 wt % of Mn.
  • Mn improves the strength of the cladding material, as well as the resistance to erosion corrosion after brazing.
  • sufficient amount of Mn for particle induced strengthening cannot be obtained and the number of particles for improved erosion corrosion resistance will be too low.
  • Mn workability of the cladding material is deteriorated and too large intermetallic particles may be formed and negatively affect the fatigue properties.
  • the sacrificial cladding comprises 0.05-0.20 wt % of Zr.
  • the presence of Zr in the sacrificial cladding serve the same purpose as in the core.
  • the sacrificial cladding does not comprise any Mg except as an unavoidable impurity.
  • Mg would alter the mechanical properties and make it difficult to join the sacrificial cladding to the core in a rolling operation.
  • the composition of the braze cladding is not critical as long as the melting point is within the desired range, preferably from 550 to 615° C.
  • the braze cladding is an aluminium alloy comprising 4-15 wt %, most preferably 6-13 wt % of Si. Small amounts of other elements may optionally be present, such as Bi for improving the wetting and Zn for adjusting the corrosion potential, as well as unavoidable impurities.
  • a typical braze cladding may, for example, consist of 4-15 w % Si, ⁇ 0.5 wt % of Bi, ⁇ 0.25 wt % of Cu, ⁇ 0.1 wt % of Mn, ⁇ 0.2 wt % of Ti, ⁇ 0.8 wt % of Fe, ⁇ 0.05 wt % each and ⁇ 0.2 wt % in total of other elements, and balance Al.
  • compositions of the alloys are set so the sacrificial cladding is less noble than the core.
  • the compositions are preferably adjusted so the corrosion potential after brazing (measured according to ASTM G69) of the core alloy is 30-150 mV higher than for the sacrificial cladding.
  • Possible combinations of specific alloys include a core consisting of, in wt %, 0.40-0.70 Si, 0.10-0.50 Fe, 0.55-0.85 Cu, 1.0-1.6 Mn, ⁇ 0.10 Mg, ⁇ 0.10 Zn, 0.05-0.15 Cr, 0.05-0.15 Zr, 0.05.-0.15 Ti, balance Al and 0.05 each and in total 0.15 of other elements, said core being cladded on one side with a braze cladding as described above, and on the other side with a sacrificial cladding selected from one of:
  • Preferred temper in the delivery condition is strain hardened tempers such as H14 or H24.
  • Tubes made from brazing sheets of the invention can be used in any brazed heat exchanger.
  • heat exchangers for automotive include radiators, air condition evaporators and condensers, cabin heaters, charge air coolers, oil coolers and battery coolers.
  • Other examples include heat exchangers for the corresponding functions in stationary heating and cooling devices.
  • the invention also concerns a process for the production of a brazing sheet as described above.
  • the process comprises the steps of:
  • preheating the cladded ingot at a temperature from 400 to 575° C., preferably from 450 to 550° C. during 1 to 25 hours;
  • cold rolling the sheet obtained at the hot rolling to the final thickness preferably from 0.15 to 0.25 mm; and, optionally annealing the cold rolled sheet at a temperature from 200 to 300° C. during 1 to 10 hours to the desired delivery temper, such as H24.
  • desired delivery temper such as H24.
  • the ingots can be provided by any suitable casting method, preferably DC casting.
  • the degree of thickness reduction at hot rolling is preferably from 95 to 99.5%.
  • the degree of thickness reduction at cold rolling is preferably from 90 to 98%.
  • brazing sheet For the compositions of the alloys and details of the final product the above description of the brazing sheet is referred to.
  • the invention further concerns the use of a brazing sheet of the invention for the manufacturing of a brazed heat exchanger.
  • the invention finally concerns a brazed heat exchanger made by forming tubes from a brazing sheet of the invention, assembling said tubes with fins and other parts of the heat exchanger followed by brazing to joining the tubes, fins and other parts.
  • FIGS. 1-4 show SEM images of brazed materials produced in the Example described below. This Example is, however, not intended to limit the scope of the invention.
  • the core alloys are the same in Materials A and C, as well as in Materials B and D, respectively.
  • the sacrificial cladding alloys are the same in Materials A and B, as well as in Materials C and D, respectively.
  • the braze cladding alloys are the same in all the Materials. The slight differences in the exact compositions are due to inevitable variations in the production of the alloys and do not change the properties of the final materials. Similarly, the slight differences in clad ratio of the braze claddings do not change the corrosion properties of the materials after brazing.
  • Coupon samples from the above materials were brazed in a laboratory Nocolok brazing furnace at 600° C. for 3 minutes. Before brazing, each sample was cleaned by NaHCO 3 solution and ethanol. After brazing, 10 mm size disc samples from each material were cut out and placed in a three electrode cell arrangement consisting of a platinum grid as counter electrode, SCE electrode as reference and the aluminium sample as the working electrode. The samples were then investigated for their corrosion resistances using cyclic voltammetry scanning.
  • the cell with the inserted sample was first rinsed using SWAAT solution according to ASTM D1141-98, pH 2.8-2.9, and subsequently refilled with 300 ml of the SWAAT solution. Prior to the cyclic voltammetry scanning, N 2 gas was bubbled through the solution for 20 minutes at a rate of 300 ml/min (1 ml/) and followed by an OCP measurement for 10 minutes.
  • the scanning was carried out as follows: Polarization in the positive direction starting from ⁇ 0.05 V vs OCP to 0.30 V vs OCP which was subsequently reversed to ⁇ 0.05V vs OCP using a scanning rate of 1 mV/s. Cycles were carried out without any time gap between any two successive cycles. The scanned samples were immersed in HNO 3 acid for 10 min, cleaned by deionized water and used for metallography analysis.
  • FIGS. 1-4 SEM images of the respective material after the tenth cycle are reproduced in FIGS. 1-4 and show the corrosion at the side of the braze cladding.
  • FIG. 1 shows Material 1
  • FIG. 2 shows Material B
  • FIG. 3 shows Material C
  • FIG. 4 shows Material D.
  • Material D according to the invention has been more evenly corroded with less deep pits compared to the other materials. Such corrosion is less severe since penetration of the material then takes longer time.

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  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
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  • Physics & Mathematics (AREA)
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  • General Engineering & Computer Science (AREA)
  • Laminated Bodies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Arc Welding In General (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10730149B2 (en) 2015-11-13 2020-08-04 Gränges Ab Brazing sheet and production method
US10737357B2 (en) * 2016-05-30 2020-08-11 Uacj Corporation Brazing sheet, manufacturing method thereof, and aluminum structure brazing method

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3442792B1 (en) * 2016-04-12 2022-02-23 Gränges AB Method for manufacturing a clad sheet product
CN107755427B (zh) * 2017-09-30 2019-07-23 银邦金属复合材料股份有限公司 一种铝合金复合箔及其制备方法
CN109595972A (zh) * 2018-11-01 2019-04-09 广西瑞祺丰新材料有限公司 一种铝合金冷却管
CN111391430A (zh) * 2020-03-30 2020-07-10 银邦金属复合材料股份有限公司 铝合金复合材料、热交换器管及汽车
WO2023087957A1 (zh) * 2021-11-18 2023-05-25 格朗吉斯铝业（上海）有限公司 一种铝管、其制造方法及全铝换热器
WO2024116659A1 (ja) * 2022-11-28 2024-06-06 東洋アルミニウム株式会社 アルミニウム合金箔、アルミニウム合金箔を用いた積層体およびそれらの製造方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120129003A1 (en) * 2010-09-21 2012-05-24 Furukawa-Sky Aluminum Corp. High-strenght aluminum alloy brazing sheet and method of manufacture

Family Cites Families (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317484A (en) * 1980-06-12 1982-03-02 Sumitomo Light Metal Industries, Ltd. Heat exchanger core
AU661865B2 (en) * 1991-10-18 1995-08-10 Furukawa Aluminum Co., Ltd. Method of producing aluminum alloy heat-exchanger
DE69428242T2 (de) * 1993-08-03 2002-06-13 Nippon Denso Co., Ltd. Aluminiumlegierung zum Hartlöten; Folie zum Hartlöten von Wärmetauschern und Verfahren zur Herstellung von Wärmetauschern
NL1004415C2 (nl) 1996-11-04 1998-05-08 Hoogovens Alu Walzprod Gmbh Niet-warmtebehandelbare aluminiumlegering als kernlegering voor brazing sheet.
JP3873267B2 (ja) * 1998-09-07 2007-01-24 三菱アルミニウム株式会社 耐食性に優れた熱交換器用アルミニウム合金クラッド材
JP4019337B2 (ja) * 1998-09-07 2007-12-12 三菱アルミニウム株式会社 耐食性に優れた熱交換器用アルミニウム合金クラッド材
JP3197251B2 (ja) * 1998-09-22 2001-08-13 カルソニックカンセイ株式会社 熱交換器用犠牲防食アルミニウム合金、および熱交換器用高耐食性アルミニウム合金複合材
ES2289009T3 (es) 2000-11-07 2008-02-01 Aleris Aluminum Koblenz Gmbh Metodo para fabricar un montaje de componentes de metal diferentes mediante soldadura fuerte.
JP3753669B2 (ja) 2002-03-18 2006-03-08 株式会社神戸製鋼所 ろう付け用アルミニウム合金複合材
US7514155B2 (en) * 2003-07-18 2009-04-07 Aleris Aluminum Koblenz Gmbh High strength aluminium alloy brazing sheet
KR20120094149A (ko) * 2003-07-18 2012-08-23 코루스 알루미늄 발쯔프로두크테 게엠베하 고강도 알루미늄합금 브레이징 시트 및 제조방법
EP1666190A4 (en) 2003-09-18 2007-02-21 Kobe Alcoa Transp Products Ltd ALUMINUM ALLOY COMPOSITE FOR SOLDERING AND HEAT EXCHANGER THEREWITH
FR2862894B1 (fr) * 2003-11-28 2007-02-16 Pechiney Rhenalu Bande en alliage d'alluminium pour brasage
JP4220410B2 (ja) 2004-02-18 2009-02-04 住友軽金属工業株式会社 熱交換器用アルミニウム合金クラッド材
US7407714B2 (en) * 2004-05-26 2008-08-05 Aleris Aluminum Koblenz Gmbh Process by producing an aluminium alloy brazing sheet, aluminium alloy brazing sheet
CN101124451A (zh) * 2005-02-17 2008-02-13 住友轻金属工业株式会社 热交换器用铝合金硬钎焊散热片材料
JP4056014B2 (ja) * 2005-04-12 2008-03-05 株式会社神戸製鋼所 アルミニウム合金製ブレージングシートおよび熱交換器用アルミニウム合金製チューブ
US20100147500A1 (en) * 2005-08-31 2010-06-17 Showa Denko K.K. Clad plate and process for production thereof
EP1934013B2 (en) * 2005-10-13 2022-05-11 Novelis Koblenz GmbH Multi-layered brazing sheet
JP4825507B2 (ja) * 2005-12-08 2011-11-30 古河スカイ株式会社 アルミニウム合金ブレージングシート
JP5049488B2 (ja) * 2005-12-08 2012-10-17 古河スカイ株式会社 アルミニウム合金ブレージングシートの製造方法
JP4702797B2 (ja) 2006-02-20 2011-06-15 住友軽金属工業株式会社 犠牲陽極材面のろう付けによる面接合性に優れたアルミニウム合金クラッド材の製造方法
WO2007131727A1 (en) 2006-05-15 2007-11-22 Aleris Aluminum Koblenz Gmbh Method of producing a clad aluminum alloy sheet for brazing purposes and sheet produced by said method
JP5068981B2 (ja) 2006-11-17 2012-11-07 古河スカイ株式会社 アルミニウム合金クラッド材
JP4181607B2 (ja) * 2007-03-29 2008-11-19 株式会社神戸製鋼所 アルミニウム合金製ブレージングシートおよびその製造方法
US8142907B2 (en) * 2007-07-19 2012-03-27 Furukawa-Sky Aluminum Corp Aluminum alloy brazing sheet having high-strength and production method therefor
CN100574972C (zh) 2007-12-20 2009-12-30 江苏常铝铝业股份有限公司 汽车热交换器用复合铝箔的制造方法
JP4473908B2 (ja) * 2007-12-27 2010-06-02 株式会社神戸製鋼所 熱交換器用アルミニウム合金クラッド材、および、その製造方法
JP5279278B2 (ja) 2008-01-09 2013-09-04 住友軽金属工業株式会社 熱交換器のチューブ材用ブレージングシート及びそれを用いる熱交換器の製造方法
CN104708867A (zh) * 2008-02-12 2015-06-17 株式会社神户制钢所 铝合金层合板
FR2931713B1 (fr) * 2008-06-02 2010-05-14 Alcan Int Ltd Bandes en alliage d'aluminium pour tubes d'echangeurs thermiques brases
DE102008059450A1 (de) * 2008-11-28 2010-06-02 Behr Gmbh & Co. Kg Aluminiumband, Lötbauteil, Herstellungsverfahren und Wärmetauscher und Verwendung
SE534283C2 (sv) * 2009-05-14 2011-06-28 Sapa Heat Transfer Ab Lodpläterad aluminiumplåt för tunna rör
SE534693C2 (sv) 2009-05-14 2011-11-22 Sapa Heat Transfer Ab Lodpläterad aluminiumplåt med hög hållfasthet och utmärkta korrosionsegenskaper
JP5576666B2 (ja) * 2010-02-08 2014-08-20 株式会社神戸製鋼所 熱交換器に用いられるアルミニウム合金クラッド材およびそれに用いるアルミニウム合金クラッド材用芯材
US8247084B2 (en) 2010-05-18 2012-08-21 Kobe Steel, Ltd. Aluminum alloy brazing sheet
US9216468B2 (en) * 2010-10-28 2015-12-22 Kanto Yakin Kogyo Co., Ltd. Method for brazing aluminum members and brazing apparatus used for same
EP2418042A1 (en) 2011-01-17 2012-02-15 Aleris Aluminum Koblenz GmbH Aluminium brazing sheet material for tubes
JP5873343B2 (ja) * 2012-01-29 2016-03-01 株式会社デンソー 高耐食性アルミニウム合金ブレージングシート、ならびに、これを用いた自動車用熱交換器の流路形成部品
US8932728B2 (en) * 2012-03-15 2015-01-13 Kobe Steel, Ltd. Aluminum-alloy clad sheet
CN103575140A (zh) * 2012-07-19 2014-02-12 格伦格斯有限公司 用于电力电子设备和电池冷却的具有焊接管的紧凑型铝换热器
JP5352001B1 (ja) * 2012-12-21 2013-11-27 三菱アルミニウム株式会社 アルミニウム材のろう付方法およびろう付構造体
JP6186239B2 (ja) * 2013-10-15 2017-08-23 株式会社Uacj アルミニウム合金製熱交換器
PT2015104760B (pt) * 2014-01-07 2019-12-12 Uacj Corp Material revestido de liga de alumínio e método para produção do mesmo, e permutador de calor utilizando o referido material revestido de liga de alumínio e método para produção do mesmo
EP3093356B1 (en) * 2014-01-10 2018-03-21 UACJ Corporation Cladded aluminium-alloy material and production method therefor, and heat exchanger using said cladded aluminium-alloy material and production method therefor
JP6228500B2 (ja) * 2014-03-28 2017-11-08 株式会社神戸製鋼所 アルミニウム合金製ブレージングシート
JP6286335B2 (ja) * 2014-09-30 2018-02-28 株式会社神戸製鋼所 アルミニウム合金製ブレージングシート
WO2016056306A1 (ja) * 2014-10-09 2016-04-14 株式会社Uacj アルミニウム合金ブレージングシートおよびろう付け方法
JP6498911B2 (ja) * 2014-11-10 2019-04-10 三菱アルミニウム株式会社 高強度・高耐食性・素材高伸びを有するアルミニウム合金ブレージングシート
WO2016143119A1 (ja) * 2015-03-12 2016-09-15 三菱アルミニウム株式会社 ろう付け後の耐食性に優れるブレージングシート
JP5945361B1 (ja) * 2015-03-20 2016-07-05 株式会社神戸製鋼所 ろう材および熱交換器用ブレージングシート
JP2017082266A (ja) * 2015-10-26 2017-05-18 株式会社神戸製鋼所 表面処理アルミニウム合金及び表面処理アルミニウム合金クラッド材
US20180326540A1 (en) 2015-11-13 2018-11-15 Gränges Ab Brazing sheet and production method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120129003A1 (en) * 2010-09-21 2012-05-24 Furukawa-Sky Aluminum Corp. High-strenght aluminum alloy brazing sheet and method of manufacture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10730149B2 (en) 2015-11-13 2020-08-04 Gränges Ab Brazing sheet and production method
US10737357B2 (en) * 2016-05-30 2020-08-11 Uacj Corporation Brazing sheet, manufacturing method thereof, and aluminum structure brazing method

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