CA2919193A1 - High strength aluminum alloy fin stock for heat exchanger - Google Patents
High strength aluminum alloy fin stock for heat exchanger Download PDFInfo
- Publication number
- CA2919193A1 CA2919193A1 CA2919193A CA2919193A CA2919193A1 CA 2919193 A1 CA2919193 A1 CA 2919193A1 CA 2919193 A CA2919193 A CA 2919193A CA 2919193 A CA2919193 A CA 2919193A CA 2919193 A1 CA2919193 A1 CA 2919193A1
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- Prior art keywords
- aluminum alloy
- fin stock
- ingot
- heat exchanger
- stock material
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Classifications
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- 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
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- 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
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- 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
- 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
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- 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
- 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
- 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
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)
- Air-Conditioning For Vehicles (AREA)
- Metal Rolling (AREA)
- Laminated Bodies (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The present invention provides an aluminum alloy fin stock alloy material with higher strength, and improved sag resistance for use in heat exchangers. This aluminum alloy fin stock alloy material was made by direct chill (DC) casting.
Description
HIGH STRENGTH ALUMINUM ALLOY FIN STOCK FOR HEAT EXCHANGER
CROSS REFERENCE TO RELATED APPLICATIONS
The present application claims the benefit of U.S. provisional patent application Serial No. 61/863,568 filed August 8, 2013, which is incorporated herein by reference in its entirety.
FIELD OF THE INVENTION
[0001] 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.
BACKGROUND
CROSS REFERENCE TO RELATED APPLICATIONS
The present application claims the benefit of U.S. provisional patent application Serial No. 61/863,568 filed August 8, 2013, which is incorporated herein by reference in its entirety.
FIELD OF THE INVENTION
[0001] 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.
BACKGROUND
[0002] There is a need for aluminum alloy fin stock with high strength and improved sag resistance high strength for use in various heat exchanger applications including radiators for automobiles. There is a need to obtain aluminum alloy fin stock with strong pre-braze mechanical properties, good behavior during brazing, i.e., enhanced brazed material sag resistance and reduced fin erosion, and good strength and conductivity characteristics after braze for high performance heat exchanger applications.
SUMMARY
SUMMARY
[0003] The present invention provides an aluminum alloy fin stock alloy material with higher strength, and improved sag resistance for use in heat exchangers. This aluminum alloy fin stock alloy material was made by direct chill (DC) casting.
[0004] A DC fin stock material was developed with desirable pre-braze (H14 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.
[0005] The aluminum alloy fin stock alloy can be used in various applications, for example heat exchangers. The finstock is particularly useful for high performance light weight, automotive heat exchangers but could be used for other brazed applications including but not limited to HVAC. In one embodiment, the aluminum alloy fin stock alloy can be used in automotive heat exchangers such as radiators, condensers and evaporators. Other objects and advantages of the invention will be apparent from the following detailed description of embodiments of the invention.
DESCRIPTION
DESCRIPTION
[0006] 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.
[0007] This DC fin stock material exhibits desirable pre-braze (H14 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.
[0008] The aluminum alloy fin stock alloy can be used in various applications, for example heat exchangers. In one embodiment, the aluminum alloy fin stock alloy can be used in automotive heat exchangers such as radiators, condensers and evaporators.
[0009] In one embodiment, 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)%.
values are in weight (wt)%.
[0010] In another embodiment, 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.
[0011] In yet another embodiment, 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.
Si, 0.50-0.75% Fe, 0.15-0.30% Cu, 1.4-1.6% Mn and 1.4-2.1% Zn, remainder aluminum.
[0012] Optionally, 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)%.
[0013] It is to be understood that the alloy compositions described herein may contain other minor elements sometimes referred to as unintentional elements, below 0.05%.
Method of Making the Ingots
Method of Making the Ingots
[0014] 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. Once cooled from the casting process, 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. Next 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). Several 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. In practice 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. During production, 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 H14 strength increases, but final post braze grain size and sag resistance is decreased. 29 % is relatively low for most aluminum rolling applications.
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. Next 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). Several 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. In practice 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. During production, 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 H14 strength increases, but final post braze grain size and sag resistance is decreased. 29 % is relatively low for most aluminum rolling applications.
[0015] In one embodiment 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.
to final gauge.
[0016] The finished cold rolled coil is then slit into many narrow strips of the width required by the heat exchanger manufacturer for forming, assembly and brazing into the finished heat exchanger.
[0017] The following example will serve to further illustrate the present invention without, at the same time, however, constituting any limitation thereof. On the contrary, it is to be clearly understood that resort may be had to various embodiments, modifications and equivalents thereof which, after reading the description herein, may suggest themselves to those skilled in the art without departing from the spirit of the invention.
Example
Example
[0018] 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 ¨130MPa. 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. The alloy material produced exhibited a sag value between 28 mm where the final gauge was 49 gm, and 43 mm where the final gauge was 83 gm, 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 gm.
conductivity)) and an open circuit potential corrosion value (vs. Standard Calomel Electrode (SCE)) of -741 mV. The alloy material produced exhibited a sag value between 28 mm where the final gauge was 49 gm, and 43 mm where the final gauge was 83 gm, 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 gm.
[0019] All patents, patent applications, publications, and abstracts cited above are incorporated herein by reference in their entirety. Various embodiments of the invention have been described in fulfillment of the various objectives of the invention.
It should be recognized that these embodiments are merely illustrative of the principles of the present invention. Numerous modifications and adaptations thereof will be readily apparent to those of skill in the art without departing from the spirit and scope of the invention as defined in the following claims.
It should be recognized that these embodiments are merely illustrative of the principles of the present invention. Numerous modifications and adaptations thereof will be readily apparent to those of skill in the art without departing from the spirit and scope of the invention as defined in the following claims.
Claims (16)
1. An aluminum alloy comprising about 0.8-1.4 wt% Si, 0.4-0.8 wt% Fe, 0.05-0.4 wt%
Cu, 1.2-1.7 wt% Mn and 1.20-2.3 wt% Zn with the remainder as Al.
Cu, 1.2-1.7 wt% Mn and 1.20-2.3 wt% Zn with the remainder as Al.
2. The aluminum alloy of claim 1, comprising about 0.9-1.3 wt% Si, 0.45-0.75 wt% Fe, 0.10-0.3 wt% Cu, 1.3-1.7 wt% Mn and 1.30-2.2 wt% Zn, with the remainder as Al.
3. The aluminum alloy of claim 1, comprising about 0.9-1.2 wt% Si, 0.5-0.75 wt% Fe, 0.15-0.3 wt% Cu, 1.4-1.6 wt% Mn and 1.4-2.1 wt% Zn, with the remainder as Al.
4. The aluminum alloy of any one of claims 1 to 3, further comprising up to 0.2 wt% of one or both of Cr or Zr.
5. An aluminum alloy fin stock material produced from the aluminum alloy of any one of claims 1 to 4 by a process, comprising:
direct chill casting the aluminum alloy into an ingot;
preheating the ingot to 450 to 560°C for 2 to 16 hours;
hot rolling the preheated ingot;
cold rolling the ingot;
inter-annealing at a temperature of 300-450°C; and, after inter-annealing, performing a final cold rolling step to achieve % cold work (%CW) of 25-35%.
direct chill casting the aluminum alloy into an ingot;
preheating the ingot to 450 to 560°C for 2 to 16 hours;
hot rolling the preheated ingot;
cold rolling the ingot;
inter-annealing at a temperature of 300-450°C; and, after inter-annealing, performing a final cold rolling step to achieve % cold work (%CW) of 25-35%.
6. The aluminum alloy fin stock material of claim 5, wherein the ingot is preheated at 480°C for 2-12 hours.
7. The aluminum alloy fin stock material of claim 5 or 6, wherein the inter-annealing temperature is 300-400°C.
8. The aluminum alloy fin stock material of any one of claims 5 to 7, having a minimum ultimate tensile strength of ¨130MPa, measured after brazing.
9. The aluminum alloy fin stock material of any one of claims 5 to 7, having a corrosion potential of -700 mV or less, measured after brazing.
10. A heat exchanger comprising the aluminum alloy of any one of claims 1 to 4 or the aluminum alloy fin stock material of any one of claims 5 to 9.
11. The heat exchanger of claim 10, wherein the heat exchanger is an automotive heat exchanger.
12. The heat exchanger of claim 10, wherein the heat exchanger is a radiator, a condenser or an evaporator.
13. Use of the aluminum alloy of any one of claims 1 to 4 or the aluminum alloy fin stock material of any one of claims 5 to 9 for fabrication of heat exchanger fins.
14. A process for making an aluminum alloy fin stock material, comprising:
direct chill casting the aluminum alloy of any one of claims 1 to 4 into an ingot;
preheating the ingot to 450 to 560°C for 2 to 16 hours;
hot rolling the preheated ingot;
cold rolling the ingot;
inter-annealing at a temperature of 300-450°C; and, after inter-annealing, performing a final cold rolling step to achieve % cold work (%CW) of 25-35%.
direct chill casting the aluminum alloy of any one of claims 1 to 4 into an ingot;
preheating the ingot to 450 to 560°C for 2 to 16 hours;
hot rolling the preheated ingot;
cold rolling the ingot;
inter-annealing at a temperature of 300-450°C; and, after inter-annealing, performing a final cold rolling step to achieve % cold work (%CW) of 25-35%.
15. The process of claim 14, wherein the ingot is preheated at 480°C
for 2-12 hours.
for 2-12 hours.
16. The process of claim 14 or 15, wherein the inter-annealing temperature is 300-400°C.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361863568P | 2013-08-08 | 2013-08-08 | |
US61/863,568 | 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 |
---|---|
CA2919193A1 true CA2919193A1 (en) | 2015-02-12 |
Family
ID=51398901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2919193A Abandoned CA2919193A1 (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) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR112014014440B1 (en) | 2011-12-16 | 2018-12-11 | Novelis Inc. | aluminum alloy fin and method of doing the same |
US20150041027A1 (en) * | 2013-08-08 | 2015-02-12 | Novelis Inc. | High Strength Aluminum Fin Stock for Heat Exchanger |
EP3177748B1 (en) | 2014-08-06 | 2020-09-30 | Novelis, Inc. | Aluminum alloy for heat exchanger fins |
DE102015226709A1 (en) * | 2014-12-24 | 2016-06-30 | Denso Corporation | Aluminum alloy fin stock for heat exchangers, process for its manufacture, and heat exchanger comprising the fin material |
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 |
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 |
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 |
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 |
CN1973056B (en) * | 2004-05-26 | 2010-11-24 | 克里斯铝轧制品有限公司 | Process for producing an aluminium alloy brazing sheet, aluminium 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 |
MY164145A (en) * | 2012-01-27 | 2017-11-30 | Uacj Corp | Aluminum alloy material for heat exchanger fin, manufacturing method for same, and heat exchanger using the said aluminum alloy material |
JP2014052366A (en) * | 2012-08-06 | 2014-03-20 | Ricoh Co Ltd | Optical measurement instrument and vehicle |
-
2014
- 2014-08-08 WO PCT/US2014/050346 patent/WO2015021383A1/en active Application Filing
- 2014-08-08 US US14/909,798 patent/US20160195346A1/en not_active Abandoned
- 2014-08-08 KR KR1020187015733A patent/KR20180063380A/en not_active Application Discontinuation
- 2014-08-08 CN CN201480044210.9A patent/CN105452499A/en active Pending
- 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 KR1020167006163A patent/KR20160042056A/en active Search and Examination
- 2014-08-08 MX MX2016001557A patent/MX2016001557A/en unknown
- 2014-08-08 JP JP2016533468A patent/JP2016534223A/en not_active Withdrawn
- 2014-08-08 CA CA2919193A patent/CA2919193A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
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KR20160042056A (en) | 2016-04-18 |
JP2016534223A (en) | 2016-11-04 |
WO2015021383A1 (en) | 2015-02-12 |
EP3030684A1 (en) | 2016-06-15 |
US20160195346A1 (en) | 2016-07-07 |
BR112016002234A2 (en) | 2017-08-01 |
KR20180063380A (en) | 2018-06-11 |
CN105452499A (en) | 2016-03-30 |
MX2016001557A (en) | 2016-05-02 |
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