EP3030684A1 - High strength aluminum alloy fin stock for heat exchanger - Google Patents
High strength aluminum alloy fin stock for heat exchangerInfo
- 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- Withdrawn
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 ⁇ .
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361863568P | 2013-08-08 | 2013-08-08 | |
PCT/US2014/050346 WO2015021383A1 (en) | 2013-08-08 | 2014-08-08 | High strength aluminum alloy fin stock for heat exchanger |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3030684A1 true EP3030684A1 (en) | 2016-06-15 |
Family
ID=51398901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14755495.0A Withdrawn EP3030684A1 (en) | 2013-08-08 | 2014-08-08 | High strength aluminum alloy fin stock for heat exchanger |
Country Status (9)
Country | Link |
---|---|
US (1) | US20160195346A1 (en) |
EP (1) | EP3030684A1 (en) |
JP (1) | JP2016534223A (en) |
KR (2) | KR20180063380A (en) |
CN (1) | CN105452499A (en) |
BR (1) | BR112016002234A2 (en) |
CA (1) | CA2919193A1 (en) |
MX (1) | MX2016001557A (en) |
WO (1) | WO2015021383A1 (en) |
Cited By (1)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101988704B1 (en) * | 2013-08-08 | 2019-06-12 | 노벨리스 인크. | High strength aluminum alloy fin stock for heat exchanger |
WO2016022457A1 (en) | 2014-08-06 | 2016-02-11 | Novelis Inc. | Aluminum alloy for heat exchanger fins |
CN105734368B (en) * | 2014-12-24 | 2020-03-17 | 三菱铝株式会社 | Aluminum alloy fin material, method for producing same, and heat exchanger provided with same |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62196348A (en) * | 1986-02-20 | 1987-08-29 | Sumitomo Light Metal Ind Ltd | Fin material for heat exchanger made of aluminum alloy |
JPH1088265A (en) * | 1996-09-06 | 1998-04-07 | Sumitomo Light Metal Ind Ltd | Aluminum alloy fin material for heat exchanger, excellent in sacrificial anode effect as well as in strength after brazing |
JP3847077B2 (en) * | 2000-11-17 | 2006-11-15 | 住友軽金属工業株式会社 | Aluminum alloy fin material for heat exchangers with excellent formability and brazing |
JP2002161324A (en) * | 2000-11-17 | 2002-06-04 | Sumitomo Light Metal Ind Ltd | Aluminum alloy fin-material for heat exchanger superior in formability and brazability |
JP4166613B2 (en) * | 2002-06-24 | 2008-10-15 | 株式会社デンソー | Aluminum alloy fin material for heat exchanger and heat exchanger formed by assembling the fin material |
US7898385B2 (en) * | 2002-06-26 | 2011-03-01 | Robert William Kocher | Personnel and vehicle identification system using three factors of authentication |
JP4725019B2 (en) * | 2004-02-03 | 2011-07-13 | 日本軽金属株式会社 | Aluminum alloy fin material for heat exchanger, manufacturing method thereof, and heat exchanger provided with aluminum alloy fin material |
JP5326123B2 (en) * | 2004-05-26 | 2013-10-30 | アレリス、アルミナム、コブレンツ、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング | Aluminum alloy brazing sheet manufacturing method and aluminum alloy brazing sheet |
SE530437C2 (en) * | 2006-10-13 | 2008-06-03 | Sapa Heat Transfer Ab | Rank material with high strength and high sagging resistance |
JP5195837B2 (en) * | 2010-07-16 | 2013-05-15 | 日本軽金属株式会社 | Aluminum alloy fin material for heat exchanger |
JP5613548B2 (en) * | 2010-12-14 | 2014-10-22 | 三菱アルミニウム株式会社 | Aluminum alloy fin material for heat exchanger and heat exchanger using the fin material |
JP5836695B2 (en) * | 2011-08-12 | 2015-12-24 | 株式会社Uacj | Aluminum alloy fin material for heat exchangers with excellent strength and corrosion resistance after brazing |
JP5345264B1 (en) * | 2012-01-27 | 2013-11-20 | 古河スカイ株式会社 | Aluminum alloy material for heat exchanger fin, manufacturing method thereof, and heat exchanger using the aluminum alloy material |
JP2014052366A (en) * | 2012-08-06 | 2014-03-20 | Ricoh Co Ltd | Optical measurement instrument and vehicle |
-
2014
- 2014-08-08 CA CA2919193A patent/CA2919193A1/en not_active Abandoned
- 2014-08-08 US US14/909,798 patent/US20160195346A1/en not_active Abandoned
- 2014-08-08 MX MX2016001557A patent/MX2016001557A/en unknown
- 2014-08-08 JP JP2016533468A patent/JP2016534223A/en not_active Withdrawn
- 2014-08-08 BR BR112016002234A patent/BR112016002234A2/en not_active Application Discontinuation
- 2014-08-08 EP EP14755495.0A patent/EP3030684A1/en not_active Withdrawn
- 2014-08-08 KR KR1020187015733A patent/KR20180063380A/en not_active Application Discontinuation
- 2014-08-08 WO PCT/US2014/050346 patent/WO2015021383A1/en active Application Filing
- 2014-08-08 KR KR1020167006163A patent/KR20160042056A/en active Search and Examination
- 2014-08-08 CN CN201480044210.9A patent/CN105452499A/en active Pending
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2015021383A1 * |
Cited By (1)
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 |
---|---|
WO2015021383A1 (en) | 2015-02-12 |
MX2016001557A (en) | 2016-05-02 |
KR20160042056A (en) | 2016-04-18 |
JP2016534223A (en) | 2016-11-04 |
CA2919193A1 (en) | 2015-02-12 |
US20160195346A1 (en) | 2016-07-07 |
BR112016002234A2 (en) | 2017-08-01 |
KR20180063380A (en) | 2018-06-11 |
CN105452499A (en) | 2016-03-30 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: F28F 21/08 20060101ALI20190418BHEP Ipc: C22C 21/00 20060101AFI20190418BHEP Ipc: C22F 1/053 20060101ALI20190418BHEP Ipc: C22F 1/04 20060101ALI20190418BHEP Ipc: C22F 1/043 20060101ALI20190418BHEP Ipc: C22C 21/10 20060101ALI20190418BHEP |
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