WO2003031667A1 - Aluminium alloy for making fin stock material - Google Patents
Aluminium alloy for making fin stock material Download PDFInfo
- Publication number
- WO2003031667A1 WO2003031667A1 PCT/EP2002/011191 EP0211191W WO03031667A1 WO 2003031667 A1 WO2003031667 A1 WO 2003031667A1 EP 0211191 W EP0211191 W EP 0211191W WO 03031667 A1 WO03031667 A1 WO 03031667A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- aluminium alloy
- stock material
- fin stock
- range
- alloy according
- Prior art date
Links
Classifications
-
- 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
-
- 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
- C22C21/003—Alloys based on aluminium containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium
-
- 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
Definitions
- the invention relates to an aluminium alloy for making fin stock material. Fin stock material is used in heat exchanger devices. The fin stock material is used for making for instance corrugated fins, by which the heat from the heat exchanger must be removed. Furthermore, the invention relates to fin stock material made from the aluminium alloy according to the invention, and to a brazed heat exchanger having fins made of this alloy. Moreover, the invention relates to a method of producing the fin stock alloy and the brazed heat exchanger.
- aluminium alloys are used for fins in heat exchanger applications because of their desirable combination of strength, weight, thermal conductivity, brazeability, corrosion resistance and formability.
- Heat exchangers from aluminium can be fabricated by stacking aluminium alloy sheets, which have been formed to a desired configuration, to form fluid passageways or tubes, and by securing aluminium alloy fins between the fluid passageways by brazing.
- the aluminium alloy sheets used to make the fluid passageways and/or the aluminium alloy used for the fins are provided with a low melting clad layer.
- the bonding between the alloy clad sheets and the fins is achieved by melting the cladding or filler material of the sheets and/or fin material.
- As a brazing method typically vacuum brazing or controlled atmosphere brazing is used.
- fin materials are used which are electrochemically anodic (less noble) relative to the fluid passageways material, so that this fin material has a sacrificial anode effect.
- This disclosed alloy is said to have an improved post-braze 0.2%-yield strength (also referred to as 0.2%-offset proof stress or 0.2% PS) over conventional alloys for the same application.
- an aluminium alloy for making fin stock material having the composition in weight percent:
- V ⁇ 0.40 and or Ti ⁇ 0.01 and or Cr ⁇ 0.01 and or Zr ⁇ 0.01 other elements up to 0.05 each, up to 0.15 in total
- This aluminium alloy has a very good thermal conductivity, thereby improving the heat exchange properties of the fins made from this aluminium alloy . Moreover, this aluminium alloy has satisfactory mechanical properties in the post-brazed condition, such as tensile strength and corrosion potential.
- this aluminium alloy is primarily intended as fin stock material for heat exchangers, it may be used for other parts of heat exchange units, such as tube plate, or other uses.
- the heat exchanger market requires a balance of properties for fin stock alloys, which includes strength, conductivity, formability, brazeability and corrosion potential. If one of these properties should be improved where the other properties must remain as good as they are, often many of the alloying elements in the composition must be changed in relation to each other.
- Si is an important alloying element in the alloy according to the invention; it is expected that Si improves the strength of the alloy by solid solution hardening and precipitation hardening. Because the solid solution in the alloy should be as low as possible for the required conductivity, the amount of Si should not be higher than 1.2 %. When the amount of Si is higher, too much Si will remain in solid solution, resulting in a lower conductivity. A more preferred range for Si is 0.4 to 0.8 %. Within this range the required combination of strength and conductivity is reached best.
- Mn is an important alloying element in conventional alloys for making fin stock material. Mn is normally added for strength. In the alloy according to this invention, the Mn content is kept very low so as to reduce the amount of solid solution in the alloy. Preferably Mn ⁇ 0.03 %, and more preferably Mn ⁇ 0.01 %, thereby improving the conductivity as much as possible. Mn may also be absent.
- Mg increases the strength of the alloy significantly, but has a detrimental effect on controlled atmosphere brazeability because it tends to interact with the flux material. For this reason the Mg content has a maximum of 0.05 %, and preferably Mg ⁇ 0.03 %, and more preferably Mg ⁇ 0.01%, to keep the Mg content as low as possible. Mg may also be absent.
- Fe is an alloying element that is present in all known aluminium alloys. Fe is added for post-braze strength. It is supposed to form precipitates with Al, Ni and Si. The solid solubility of Fe in Al is extremely low; therefore, Fe can be used to improve the strength without compromising the conductivity.
- Fe is in the range of 0.3 % to 1.6 %, and more preferably in the range of 0.7 % to 1.3 %, so as to reach a preferred strength without compromising the formability.
- Ni is also present to improve the post-braze strength of the alloy. Like Fe, the solid solubility of Ni in Al is extremely low; therefore, Ni can be used to improve the strength without compromising the conductivity. However, when the Ni content is > 2 %, the formability becomes too low. Ni is preferably present in the range of of 0.8 to 1.2 % because in this range the best combination of strength and formability is found.
- Cu is present in the alloy according to the invention to improve the post-braze strength of the alloy.
- the amount of Cu is preferably restricted to the range of 0.1 % to 0.8 %, and more preferably to the range of 0.1 % to 0.6 %, so as to reach the required strength.
- Cu is believed to increase the corrosion potential of the alloy, whereas the corrosion potential should be low to allow the fin material to act as a sacrificial anode.
- at least one of the elements Zn, Sn or In should be present. Zn, Sn or In, or a combination of these three elements, are present to counteract the effect of Cu on the corrosion potential of the alloy.
- the amount of these elements must therefore be higher than zero, taking into account the stronger effect of Sn and especially In as compared to Zn.
- the amounts of Zn, Sn and In should not be higher than necessary and therefore preferably Zn is in the range of 1.0 % to 3.0 % and/or
- Sn is in the range of 0.1 % to 1.0 % and/or In is in the range of 0.01 % to 0.05 %.
- Zn can be (partly) replaced by Sn and or In.
- Ti, N, Cr and Zr are to be avoided as much as possible, because they have a negative effect on the conductivity of the alloy.
- these elements are below
- fin stock material made from the aluminium alloy as specified above, wherein the fin stock material has a post-braze conductivity of at least 26 MS/m (45 % IACS), and preferably at least 29 MS/m (50 % IACS). A conductivity of more than 45 % IACS is good and a conductivity of more than 50 % IACS is very good in comparison to conventional fin stock material for heat exchangers.
- the fin stock material has a corrosion potential between -750 mV and
- the fin stock material has a post braze UTS (Ultimate Tensile Strength) between 135 and 155 MPa, and/or a 0.2% PS > 50
- a brazed heat exchanger having fins made of an aluminium alloy according the first aspect of the invention, or having fins made of fin stock material according to the second aspect of the invention.
- the nine different chemistries as specified in table 1 were cast and sawn to pieces with a thickness of 80 mm, and thereafter preheated to a temperature below 540°C, the alloys were not homogenised. Subsequently hot rolled at a temperature below 540°C and cold rolled to a thickness of 0.15 mm. After inter annealing, the pieces were cold rolled to a thickness of 0.1 mm.
- alloys 1 to 4 of table 1 no Ti, N, Cr or Zr is present.
- the Zn present in the alloys can be (partly) replaced by Sn and or In, as is known in the art.
- the alloys 4 to 9 are comparative examples that do not fit in the alloy ranges according to the invention.
- the amount of Mn is too high.
- alloys 6.7 and 8 additions of Zr, Ti and N, respectively, are also present.
- the Mn level of alloys 4 and 5 is increased as compared to alloys 1, 2 and 3, the strength is not significantly increased. This is attributed to the decrease in ⁇ i.
- Alloys 6, 7 and 8 show that with the ⁇ i level of alloys 4 and 5 high strength can be reached when Zr, Ti or N additions are present. However, due to the additions of Mn, Zr, Ti or N in the alloys 4 to 9, the conductivity of these alloys is comparatively low.
- the three alloys 1, 2 and 3 having a composition according to the invention clearly have a high conductivity, a sufficiently high strength and a corrosion potential within the required range to get the sacrificial anode effect.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Prevention Of Electric Corrosion (AREA)
- Conductive Materials (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003534636A JP2005504890A (en) | 2001-10-05 | 2002-10-02 | Aluminum alloy for fin material production |
MXPA04003133A MXPA04003133A (en) | 2001-10-05 | 2002-10-02 | Aluminium alloy for making fin stock material. |
US10/491,494 US20050019204A1 (en) | 2001-10-05 | 2002-10-02 | Aluminium alloy for making fin stock material |
CA002462074A CA2462074A1 (en) | 2001-10-05 | 2002-10-02 | Aluminium alloy for making fin stock material |
KR10-2004-7004941A KR20040045477A (en) | 2001-10-05 | 2002-10-02 | Aluminium alloy for making fin stock material |
EP02782840A EP1436438A1 (en) | 2001-10-05 | 2002-10-02 | Aluminium alloy for making fin stock material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01203759A EP1300480A1 (en) | 2001-10-05 | 2001-10-05 | Aluminium alloy for making fin stock material |
EP01203759.4 | 2001-10-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003031667A1 true WO2003031667A1 (en) | 2003-04-17 |
Family
ID=8181014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/011191 WO2003031667A1 (en) | 2001-10-05 | 2002-10-02 | Aluminium alloy for making fin stock material |
Country Status (8)
Country | Link |
---|---|
US (1) | US20050019204A1 (en) |
EP (2) | EP1300480A1 (en) |
JP (1) | JP2005504890A (en) |
KR (1) | KR20040045477A (en) |
CN (1) | CN1578844A (en) |
CA (1) | CA2462074A1 (en) |
MX (1) | MXPA04003133A (en) |
WO (1) | WO2003031667A1 (en) |
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KR20060135783A (en) | 2004-02-25 | 2006-12-29 | 메르크 파텐트 게엠베하 | Reactive mesogenic charge transport compounds |
CN100402686C (en) * | 2005-03-07 | 2008-07-16 | 东北轻合金有限责任公司 | Aluminium alloy foil used for automobile radiator and its making method |
JP2008006480A (en) * | 2006-06-30 | 2008-01-17 | Sumitomo Light Metal Ind Ltd | Brazing fin material for heat exchanger, heat exchanger, and method for manufacturing the same |
KR100840385B1 (en) * | 2006-07-20 | 2008-06-23 | 성훈엔지니어링(주) | Heat resisting aluminum alloy |
US20090279566A1 (en) * | 2008-05-12 | 2009-11-12 | Motorola, Inc. | Method and system for reducing call set up time in a group call |
CN101660883B (en) * | 2009-09-04 | 2011-10-26 | 东莞市奥达铝业有限公司 | Manufacturing method of vehicle aluminum alloy radiating fin |
CN102011036A (en) * | 2010-11-24 | 2011-04-13 | 肇庆莱尔达光电科技有限公司 | Die casting aluminum alloy |
JP5789401B2 (en) * | 2011-04-15 | 2015-10-07 | 株式会社神戸製鋼所 | Aluminum fin material for heat exchanger |
CN102296217A (en) * | 2011-08-24 | 2011-12-28 | 吴江市精工铝字制造厂 | High-strength heat-resistant aluminum alloy |
CA2856488C (en) | 2011-12-16 | 2019-10-22 | Novelis Inc. | Aluminium fin alloy and method of making the same |
CN102534325B (en) * | 2011-12-31 | 2013-10-16 | 江苏常铝铝业股份有限公司 | Horizontal-flow porous pipe for heat exchanger and manufacturing method of the horizontal-flow porous pipe |
BR112014029043A2 (en) * | 2012-05-23 | 2018-04-24 | Graenges Sweden Ab | ultra high bending and fusion resistant fin material |
KR101468957B1 (en) * | 2012-05-30 | 2014-12-05 | 한국기계연구원 | Aluminum alloy for casting |
CN102703783A (en) * | 2012-05-30 | 2012-10-03 | 江门市长利光电科技有限公司 | High-heat conduction aluminum alloy for casting |
JP5954099B2 (en) | 2012-10-12 | 2016-07-20 | 日本軽金属株式会社 | Aluminum alloy sheet for battery cases with excellent formability, heat dissipation and weldability |
CN102994813A (en) * | 2012-11-19 | 2013-03-27 | 宁波福士汽车部件有限公司 | Aluminum alloy material for air conditioner pipe |
CN103572101A (en) * | 2013-10-21 | 2014-02-12 | 姚富云 | Heat exchanger aluminum alloy radiating fin material suitable for hard brazing |
CN103572123A (en) * | 2013-10-21 | 2014-02-12 | 姚富云 | Manufacturing method of heat exchanger aluminum alloy radiating fin suitable for hard brazing |
CN103572078A (en) * | 2013-10-21 | 2014-02-12 | 姚富云 | Refining method of aluminum alloy for heat exchangers |
JP6206322B2 (en) * | 2014-05-14 | 2017-10-04 | 日本軽金属株式会社 | Aluminum alloy fin material for heat exchanger excellent in brazing and sag resistance and method for producing the same |
EP3177748B1 (en) | 2014-08-06 | 2020-09-30 | Novelis, Inc. | Aluminum alloy for heat exchanger fins |
CN104233007A (en) * | 2014-08-27 | 2014-12-24 | 邹平齐星工业铝材有限公司 | High-thermal-conductivity heat transfer fin and manufacturing method thereof |
CN104532084A (en) * | 2014-11-25 | 2015-04-22 | 安徽天祥空调科技有限公司 | High strength anti-cracking air conditioning radiator aluminum alloy sheet and preparation method thereof |
CN105296813A (en) * | 2015-11-03 | 2016-02-03 | 任静儿 | Aluminum alloy for liquid crystal display device wire harness |
CN105441758A (en) * | 2015-11-03 | 2016-03-30 | 任静儿 | Aluminum alloy for battery connecting terminal |
CN105296814A (en) * | 2015-11-03 | 2016-02-03 | 任静儿 | Aluminum alloy for battery wiring terminal |
CN107742614A (en) * | 2017-10-30 | 2018-02-27 | 镇江佳鑫精工设备有限公司 | A kind of semiconductor equipment circuit board |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1524355A (en) * | 1975-10-31 | 1978-09-13 | Alcan Res & Dev | Aluminium alloy sheet products |
JPS57163725A (en) * | 1979-09-28 | 1982-10-08 | Taiho Kogyo Co Ltd | Sliding bearing |
JPH0525572A (en) * | 1991-07-19 | 1993-02-02 | Furukawa Alum Co Ltd | Corrosion resisting aluminum alloy clad material for high temperature forming |
EP0637481A1 (en) * | 1993-08-03 | 1995-02-08 | The Furukawa Electric Co., Ltd. | Aluminum alloy brazing material and brazing sheet for heat-exchangers and method for fabricating aluminum alloy heat-exchangers |
JP2000303156A (en) * | 1999-04-16 | 2000-10-31 | Furukawa Electric Co Ltd:The | PRODUCTION OF CONTINUOUS CAST AND ROLLED COIL OF HYPER- EUTECTIC Al-Ni-Fe BASE ALLOY |
WO2001036697A2 (en) * | 1999-11-17 | 2001-05-25 | Corus Aluminium Walzprodukte Gmbh | Aluminium brazing alloy |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6329075B1 (en) * | 2000-02-03 | 2001-12-11 | Reycan, L.P. | Electrical conductivity and high strength aluminum alloy composite material and methods of manufacturing and use |
US7407714B2 (en) * | 2004-05-26 | 2008-08-05 | Aleris Aluminum Koblenz Gmbh | Process by producing an aluminium alloy brazing sheet, aluminium alloy brazing sheet |
-
2001
- 2001-10-05 EP EP01203759A patent/EP1300480A1/en not_active Withdrawn
-
2002
- 2002-10-02 MX MXPA04003133A patent/MXPA04003133A/en not_active Application Discontinuation
- 2002-10-02 KR KR10-2004-7004941A patent/KR20040045477A/en not_active Application Discontinuation
- 2002-10-02 CN CNA028215192A patent/CN1578844A/en active Pending
- 2002-10-02 US US10/491,494 patent/US20050019204A1/en not_active Abandoned
- 2002-10-02 CA CA002462074A patent/CA2462074A1/en not_active Abandoned
- 2002-10-02 EP EP02782840A patent/EP1436438A1/en not_active Withdrawn
- 2002-10-02 JP JP2003534636A patent/JP2005504890A/en not_active Withdrawn
- 2002-10-02 WO PCT/EP2002/011191 patent/WO2003031667A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1524355A (en) * | 1975-10-31 | 1978-09-13 | Alcan Res & Dev | Aluminium alloy sheet products |
JPS57163725A (en) * | 1979-09-28 | 1982-10-08 | Taiho Kogyo Co Ltd | Sliding bearing |
JPH0525572A (en) * | 1991-07-19 | 1993-02-02 | Furukawa Alum Co Ltd | Corrosion resisting aluminum alloy clad material for high temperature forming |
EP0637481A1 (en) * | 1993-08-03 | 1995-02-08 | The Furukawa Electric Co., Ltd. | Aluminum alloy brazing material and brazing sheet for heat-exchangers and method for fabricating aluminum alloy heat-exchangers |
JP2000303156A (en) * | 1999-04-16 | 2000-10-31 | Furukawa Electric Co Ltd:The | PRODUCTION OF CONTINUOUS CAST AND ROLLED COIL OF HYPER- EUTECTIC Al-Ni-Fe BASE ALLOY |
WO2001036697A2 (en) * | 1999-11-17 | 2001-05-25 | Corus Aluminium Walzprodukte Gmbh | Aluminium brazing alloy |
Non-Patent Citations (3)
Title |
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PATENT ABSTRACTS OF JAPAN vol. 007, no. 005 (M - 184) 11 January 1983 (1983-01-11) * |
PATENT ABSTRACTS OF JAPAN vol. 017, no. 315 (C - 1071) 16 June 1993 (1993-06-16) * |
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 13 5 February 2001 (2001-02-05) * |
Also Published As
Publication number | Publication date |
---|---|
KR20040045477A (en) | 2004-06-01 |
JP2005504890A (en) | 2005-02-17 |
MXPA04003133A (en) | 2004-07-08 |
CA2462074A1 (en) | 2003-04-17 |
EP1300480A1 (en) | 2003-04-09 |
EP1436438A1 (en) | 2004-07-14 |
US20050019204A1 (en) | 2005-01-27 |
CN1578844A (en) | 2005-02-09 |
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