EP3030684A1 - Tôle à ailettes en alliage d'aluminium haute résistance pour échangeurs de chaleur - Google Patents

Tôle à ailettes en alliage d'aluminium haute résistance pour échangeurs de chaleur

Info

Publication number
EP3030684A1
EP3030684A1 EP14755495.0A EP14755495A EP3030684A1 EP 3030684 A1 EP3030684 A1 EP 3030684A1 EP 14755495 A EP14755495 A EP 14755495A EP 3030684 A1 EP3030684 A1 EP 3030684A1
Authority
EP
European Patent Office
Prior art keywords
aluminum alloy
fin stock
ingot
heat exchanger
stock material
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.)
Withdrawn
Application number
EP14755495.0A
Other languages
German (de)
English (en)
Inventor
Andrew D. Howells
Kevin Michael Gatenby
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.)
Novelis Inc Canada
Novelis Inc
Original Assignee
Novelis Inc Canada
Novelis Inc
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
Application filed by Novelis Inc Canada, Novelis Inc filed Critical Novelis Inc Canada
Publication of EP3030684A1 publication Critical patent/EP3030684A1/fr
Withdrawn legal-status Critical Current

Links

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
    • C22C21/10—Alloys based on aluminium 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • 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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/124—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and being formed of pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/04—Fastening; Joining by brazing

Definitions

  • the present invention relates to the fields of material science, material chemistry, metallurgy, aluminum alloys, aluminum fabrication, and related fields.
  • the present invention provides novel aluminum alloys for use in the production of heat exchanger fins, which are, in turn, employed in various heat exchanger devices, for example, motor vehicle radiators, condensers, evaporators and related devices.
  • a DC fin stock material was developed with desirable pre-braze (HI 4 temper) and post-braze mechanical properties, sag resistance, corrosion resistance and conductivity.
  • the aluminum alloy fin stock alloy displays larger grain and improved strength before brazing.
  • the present invention provides an aluminum alloy fin stock alloy material with higher strength, improved corrosion resistance and improved sag resistance for use in heat exchangers, such as automotive heat exchangers.
  • This aluminum alloy fin stock alloy material was made by direct chill casting.
  • the aluminum alloy fin stock alloy can be used in various applications, for example heat exchangers.
  • the aluminum alloy fin stock alloy can be used in automotive heat exchangers such as radiators, condensers and evaporators.
  • the DC fin stock material comprises about 0.8-1.4% Si, 0.4- 0.8% Fe, 0.05-0.4% Cu, 1.2-1.7% Mn and 1.2-2.3% Zn, remainder aluminum. All % values are in weight (wt)%.
  • the DC fin stock material comprises about 0.9-1.3% Si, 0.45-0.75% Fe, 0.10-0.30% Cu, 1.3-1.7% Mn and 1.30-2.2% Zn, remainder aluminum.
  • the DC fin stock material comprises about 0.9-1.2% Si, 0.50-0.75% Fe, 0.15-0.30% Cu, 1.4-1.6% Mn and 1.4-2.1% Zn, remainder aluminum.
  • Cr and/or Zr or other grain size controlling elements may be present in these alloy compositions up to 0.2 % each, up to 0.15% %, up to 0.1 %, up to 0.05 %, or up to 0.03 %. All % values are in weight (wt)%.
  • alloy compositions described herein may contain other minor elements sometimes referred to as unintentional elements, below 0.05%.
  • the ingots described herein are made with a Direct Chill (DC) process, which is commonly used throughout the aluminum sheet industry, whereby a large ingot -1.5 m x 0.6 m x 4 m is cast from a large holding furnace which supplies metal to a shallow mold or molds supplied with cooling water.
  • the solidifying ingot is continuously cooled by the direct impingement of the cooling water and is withdrawn slowly from the base of the mold until the full ingot or ingots are completed.
  • the ingot rolling surfaces are machined to remove surface segregation and irregularities.
  • the machined ingot is preheated for hot rolling.
  • the preheating temperature and duration are controlled to low levels to preserve a large grain size and high strength after the finished fin stock is brazed.
  • the ingot is hot rolled to form a coil which is then cold rolled.
  • the cold rolling process takes place in several steps and an interanneal in the range of about 300-450°C is applied to recrystallize the material prior to the final cold rolling step.
  • the material is cold rolled to obtain the desired final gauge and slit in narrow strips suitable for the manufacture of radiators and other automotive heat exchangers.
  • a pre-heat of the ingots prior to hot rolling is conducted in such a way that the final metal temperature achieved is about 480°C and is held there for an average of about 4 hours (typically a minimum of about 2 hours and a maximum of about 12 hours).
  • ingots (about 8 to 30) are charged to a furnace and preheated with gas or electricity to the rolling temperature.
  • Aluminum alloys are typically rolled in the range of about 450°C to about 560°C. If the temperature is too cold, the roll loads are too high, and if the temperature is too hot, the metal may be too soft and break up in the mill. In this case the preheat temperature is low relative to other aluminum products and the hold time is relatively short, to limit the growth of dispersoids that would decrease the final post braze grain size.
  • a hot mill is scheduled to roll many different ingots and alloys and cannot always roll the ingots at minimum soak time. In one embodiment, the minimum soak time at about 480°C is about 2 hours.
  • the inter-anneal temperature applied was about 400°C for an average of about 3 hours followed by applying % cold work (CW) of about 29% to final gauge.
  • the % CW is the degree of cold rolling applied to get the material in the final required strength range.
  • the % cold work is defined as: (initial gauge - final gauge)* 100/ initial gauge. As cold work increases, the H 14 strength increases, but final post braze grain size and sag resistance is decreased. 29 % is relatively low for most aluminum rolling applications.
  • a pre heat practice at about 480°C for an average of 4 hours is employed with an interanneal temperature of about 300-400°C and % CW of about 25-35% to final gauge.
  • a DC case alloy composition was made.
  • the composition range of the alloy was within the following specification: 1.1 ⁇ 0.1% Si, 0.6 ⁇ 0.1% Fe, 0.2 ⁇ 0.05% Cu, 1.4 ⁇ 0.1% Mn and 1.50 ⁇ 0.1% Zn with the remainder aluminum.
  • the alloy material had a minimum ultimate tensile strength of ⁇ T30MPa.
  • the alloy material had an average conductivity after brazing of -43 IACS (International Annealed Copper Standard (i.e., pure copper is 100% conductivity)) and an open circuit potential corrosion value (vs. Standard Calomel Electrode (SCE)) of -741 mV.
  • IACS International Annealed Copper Standard (i.e., pure copper is 100% conductivity)
  • SCE Standard Calomel Electrode
  • the alloy material produced exhibited a sag value between 28 mm where the final gauge was 49 ⁇ , and 43 mm where the final gauge was 83 ⁇ , which was within the required specifications at these gauges. These values were measured after applying a simulated brazing cycle whereby the sample was heated to a temperature of 605°C and cooled to room temperature in a period of about 20 minutes to simulate the temperature time profile of a commercial brazing process.
  • the alloy material produced varied in gauge between 49 and 83 ⁇ .

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)
  • Crystallography & Structural Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Continuous Casting (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Laminated Bodies (AREA)
  • Metal Rolling (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

Cette invention concerne un matériau allié de tôle à ailettes en alliage d'aluminium pour échangeurs de chaleur, présentant une résistance supérieure et une résistance améliorée au gauchissement. Ledit matériau allié de tôle à ailettes en alliage d'aluminium est fabriqué par coulée semi-continue (DC).
EP14755495.0A 2013-08-08 2014-08-08 Tôle à ailettes en alliage d'aluminium haute résistance pour échangeurs de chaleur Withdrawn EP3030684A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361863568P 2013-08-08 2013-08-08
PCT/US2014/050346 WO2015021383A1 (fr) 2013-08-08 2014-08-08 Tôle à ailettes en alliage d'aluminium haute résistance pour échangeurs de chaleur

Publications (1)

Publication Number Publication Date
EP3030684A1 true EP3030684A1 (fr) 2016-06-15

Family

ID=51398901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14755495.0A Withdrawn EP3030684A1 (fr) 2013-08-08 2014-08-08 Tôle à ailettes en alliage d'aluminium haute résistance pour échangeurs de chaleur

Country Status (9)

Country Link
US (1) US20160195346A1 (fr)
EP (1) EP3030684A1 (fr)
JP (1) JP2016534223A (fr)
KR (2) KR20160042056A (fr)
CN (1) CN105452499A (fr)
BR (1) BR112016002234A2 (fr)
CA (1) CA2919193A1 (fr)
MX (1) MX2016001557A (fr)
WO (1) WO2015021383A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9719156B2 (en) 2011-12-16 2017-08-01 Novelis Inc. Aluminum fin alloy and method of making the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2919662C (fr) * 2013-08-08 2020-08-25 Novelis Inc. Tole a ailettes en alliage d'aluminium a haute resistance pour echangeur de chaleur
WO2016022457A1 (fr) 2014-08-06 2016-02-11 Novelis Inc. Alliage d'aluminium pour ailettes d'échangeur de chaleur
CN105734368B (zh) * 2014-12-24 2020-03-17 三菱铝株式会社 铝合金翅片材料、其制造方法及具备该材料的换热器

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9719156B2 (en) 2011-12-16 2017-08-01 Novelis Inc. Aluminum fin alloy and method of making the same

Also Published As

Publication number Publication date
KR20160042056A (ko) 2016-04-18
CA2919193A1 (fr) 2015-02-12
MX2016001557A (es) 2016-05-02
BR112016002234A2 (pt) 2017-08-01
CN105452499A (zh) 2016-03-30
KR20180063380A (ko) 2018-06-11
US20160195346A1 (en) 2016-07-07
WO2015021383A1 (fr) 2015-02-12
JP2016534223A (ja) 2016-11-04

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