CN1578844A - Aluminium alloy for making fin stock material - Google Patents

Aluminium alloy for making fin stock material Download PDF

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Publication number
CN1578844A
CN1578844A CNA028215192A CN02821519A CN1578844A CN 1578844 A CN1578844 A CN 1578844A CN A028215192 A CNA028215192 A CN A028215192A CN 02821519 A CN02821519 A CN 02821519A CN 1578844 A CN1578844 A CN 1578844A
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CN
China
Prior art keywords
aluminium alloy
fin material
alloy
scope
aforementioned arbitrary
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Pending
Application number
CNA028215192A
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Chinese (zh)
Inventor
S·W·哈勒
J·A·范德赫棼
A·J·韦特布罗德
A·比格尔
K·菲尔埃格
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KERRES ALUMINIUM WALZPRODUKTE GmbH
Aleris Aluminum Canada LP
Original Assignee
KERRES ALUMINIUM WALZPRODUKTE GmbH
Corus LP
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Publication of CN1578844A publication Critical patent/CN1578844A/en
Pending legal-status Critical Current

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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

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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)
  • Laminated Bodies (AREA)
  • Conductive Materials (AREA)

Abstract

An aluminium alloy for making fin stock material, having the composition in weight percent: Si <= 1.2, Mn <= 0.05, Mg <= 0.05, Fe <= 2.0, 0.5 <= Ni <= 1.5, 0.05 <= Cu <= 1.0, 0.5 <= Zn <= 4.0 and/or 0.1 <= Sn <= 2.0 and/or 0.01 <= In <= 0.5, v<=0.40 and/or Ti<0.01 and/or Cr<0.01 and/or Zr <0.01other elements up to 0.05 each, up to 0.15 in total Al balance.

Description

Be used to make the aluminium alloy of fin material
Technical field
The present invention relates to a kind of aluminium alloy that is used to make fin material.Fin material is used for heat exchanger.Described fin material is used for Production Example such as corrugate fin, and heat is discharged from heat exchanger by this corrugate fin.In addition, the present invention relates to use the fin material of making according to aluminium alloy of the present invention, and relate to a kind of brazed metal heat exchanger with radiator element of making by this alloy.And, the present invention relates to a kind of method of producing described fin material alloy and brazed metal heat exchanger.
Background technology
In the prior art, because the gratifying combination of its intensity, weight, heat conductivity, braze ability energy, erosion resistance and plastic performance, aluminium alloy is used to the radiator element in the heat exchanger application.
Aluminum-made heat exchanger can be by piling up aluminium alloy plate manufacturing, and it has formed required structure, forming fluid passage or pipeline, and by soldering aluminum alloy heat sink is installed between the fluid passage and forms.The aluminium alloy that is used to make the aluminium alloy plate of fluid passage and/or be used for described radiator element is provided with a low-melting coating layer.Bonding between described plate and the radiator element realizes by the coating or the packing material that melt described plate and/or fin material.As method for welding, generally use vacuum brazing or controlled atmosphere soldering.In order to improve the erosion resistance of fluid passage, use with respect to the fin material of fluid passage material, so that this fin material has the sacrificial anode effect as electrochemistry anode (less precious metal).
An example that is used for making the aluminium alloy of fin material provides for WO01/36697 number at international patent application.This alloy has the composition of following weight percent:
Si?????????????????0.7-1.2
Mn?????????????????0.7-1.2
Mg at the most 0.35
Fe at the most 0.8
Zn at the most 3.0
Ni at the most 1.5
Cu at the most 0.5
Ti at the most 0.20
In at the most 0.20
Zr at the most 0.25
V at the most 0.25
Cr at the most 0.25
Other element each at the most 0.05, and total amount at the most 0.15
Surplus is Al.
The alloy of the disclosure it is said that the conventional alloys than same application has 0.2% yield strength (being also referred to as 0.2% condition surrender proof strength or 0.2%PS) after the soldering of improvement.
Summary of the invention
An object of the present invention is to provide a kind of aluminium alloy that is used to make fin material, it can be used for heat exchanger, and has the heat-conductive characteristic that has improved.
Another object of the present invention provides a kind of like this aluminium alloy, and it has at least and the same intensity of conventional intensity of aluminum alloy that is used to make fin material.
Another purpose of the present invention provides a kind of like this aluminium alloy, and it has a corrosion potential, this electromotive force be at least with the same negative potential of corrosion potential of the conventional aluminium alloy that is used to make fin material.
In one aspect of the invention, one or more these purposes are by a kind of aluminium alloy realization that is used to make fin material, and this aluminium alloy has the composition of following weight percent:
Si?????????≤1.2
Mn?????????≤0.05
Mg?????????≤0.05
Fe?????????≤2.0
0.5≤Ni≤1.5
0.05≤Cu≤1.0
0.5≤Zn≤4.0 and/or 0.1≤Sn≤2.0 and/or 0.01≤In≤0.5
V≤0.40 and/or Ti＜0.01 and/or Cr＜0.01 and/or Zr＜0.01
Other element each at the most 0.05, and total amount at the most 0.15
Surplus is Al.
This aluminium alloy has very good heat-conductive characteristic, has therefore improved the heat exchange characteristics of the radiator element of being made by this aluminium alloy.And this aluminium alloy has gratifying mechanical property such as tensile property and corrosion potential under the condition after the soldering.
This aluminium alloy mainly is used as the fin material of heat exchanger, but it also can be used for other parts such as the tube sheet (tube plate) of heat exchange unit, or other purposes.
Especially, the balance of the heat exchanger market demands fin material alloy property in the automotive industry, it comprises intensity, conductivity, plastic performance, braze ability energy and corrosion potential.If one of these performances should be improved, and that other performance must keep is the same originally with it, and many alloying elements must change relative to each other in the composition.
Under existing conditions, the invention has the advantages that, seen that the sosoloid that the conductivity of alloy can reduce in the alloy by the content of carefully selecting some alloying element improves.This just causes the restriction below the aluminium alloy interalloy element of the present invention.All per-cents all are weight percentage.
Si is a kind of important alloying element in the alloy of the present invention; Expectation Si improves the intensity of alloy by solution hardening and precipitation-hardening.Because for necessary conductivity, the sosoloid in the alloy should be low as much as possible, and the quantity of Si should not be higher than 1.2%.When the quantity of Si is higher, too many Si will be retained in the sosoloid, thereby cause lower conductive performance.The preferred scope of Si is 0.4-0.8%.In this scope, intensity and conductive required best in conjunction with arriving.
Mn is a kind of important alloying element at the conventional alloy that is used for making fin material.Generally add Mn for intensity.In alloy of the present invention, it is very low that Mn content keeps, so that reduce the content of sosoloid in the alloy.Mn≤0.03% preferably, Mn≤0.01% more preferably, thus improved conductivity as much as possible.Can there be Mn yet.
Mg significantly increases the intensity of alloy, but has disadvantageous effect aspect the controlled atmosphere braze ability, because it tends to interact with flux material.For this reason, Mg content is 0.05% to the maximum, Mg≤0.03% preferably, and Mg≤0.01% more preferably is to keep Mg content low as much as possible.Can there be Mg yet.
Fe is a kind of alloying element that is present in all known aluminium alloys.Add Fe for the intensity after the soldering.Infer that itself and Al, Ni and Si form and separate out.The solid solubility of Fe is extremely low among the Al; Therefore, Fe can be used to improve intensity and not damage conductivity.Preferably the scope of Fe is 0.3%-1.6%, and preferred scope is 0.7%-1.3%, does not damage formability so that reach preferred intensity.
The existence of Ni also is used for to improve the intensity behind the described alloy brazed.The same with iron, the solid solubility of Ni is extremely low in Al, and therefore, Ni can be used to improve intensity and not damage conductivity.Yet, when Ni content greater than 2% the time, it is too low that formability becomes.Preferably the scope of Ni existence is 0.8%-1.2%, because in this scope, finds the best combination of intensity and formability.
Cu exist with alloy of the present invention in, to improve intensity behind the described alloy brazed.Preferably, the quantity limitation of Cu more preferably, is limited in the 0.1%-0.6% scope in the scope of 0.1%-0.8%, so that reach desired intensity.Yet, think that Cu has increased the corrosion potential of described alloy, but described corrosion potential should be low, serves as sacrificial anode to allow described fin material.For this reason, one of element Zn, Sn or In should exist at least.
There is the combination of Zn, Sn, In or these three kinds of elements, to offset the influence of Cu to described alloy corrosion electromotive force.Therefore, consider with Zn and compare the particularly influence more by force of In of Sn that the quantity of these elements must be higher than 0.The quantity of Zn, Sn and In should not be higher than necessary quantity, therefore preferably, the scope of Zn be 1.0%-3.0% and/or Sn for scope be that the scope of 0.1%-1.0% and/or In is 0.01%-0.05%.Preferably, only have Zn to exist, but Zn can be replaced by Sn and/or In (partly).
Avoid Ti, V, Cr and Zr as much as possible, because they have negative interaction to the conductivity of described alloy.Preferably, these elements each all be lower than 0.01%.
Someone thinks that all elements that is present in the aluminium is all harmful to the conductivity of alloy.Therefore, impurity and the element that deliberately adds should be low as much as possible, and deliberately the adding of the element that adds is for no other reason than that need them to reach the degree of desired properties.
In a second aspect of the present invention, the fin material that provides a kind of aluminium alloy as mentioned above to make, wherein said fin material have conductivity after the soldering of 26MS/m (45%IACS) at least, and are preferably 29MS/m (50%IACS) at least.Comparing with the conventional fin material of heat exchanger, is good greater than the conductivity of 45%IACS, and is extraordinary greater than the conductivity of 50%IACS.
Preferably, with SCE (ASTM G69) relatively, described fin material has-750mV and-corrosion potential between the 950mV, more preferably be-750mV and-850mV between.Index S CE is meant the mv voltage measured with respect to saturated calomel electrode.When this fin material was used for heat exchanger, these numerical value of corrosion potential had provided a good sacrificial anode effect.
According to a preferred embodiment, described fin material has UTS (ultimate tensile strength) and/or 0.2%PS＞50MPa after the soldering between one 135 and the 155MPa.This intensity is enough high for the normal use of fin material.
According to a third aspect of the invention we, provide a kind of brazed metal heat exchanger, it has the radiator element of making according to the first aspect present invention aluminium alloy, or has the radiator element of making according to the second aspect present invention fin material.
Embodiment
To illustrate according to aluminium alloy of the present invention and fin material by non-limiting and comparison example now.
On breadboard scale, nine kinds of alloys are casting with the setting rate in the setting rate scope relatively in the direct Quench casting of technical scale.These alloys are produced on laboratory scale, but utilize the direct Quench casting of technical scale and the continuous cast aluminium method of various standards, carry out heat and/or cold rolling subsequently, can produce on technical scale according to aluminium alloy of the present invention.
The chemical ingredients of described nine kinds of examples of alloys provides in table 1, and some correlated performances after the simulation soldering provide in table 2.
Table 1
The chemical ingredients of the aluminium alloy of being tested by weight percentage, surplus are aluminium and impurity
Alloy ??Si ??Mn ??Mg ??Fe ??Ni ??Cu ??Zn ??Ti ??Zr ??V
??1 ??0.70 ??＜0.01 ??0.01 ??1.05 ??0.94 ??0.15 ??1.52 ??＜0.01 ??＜0.01 ??＜0.01
??2 ??0.70 ??＜0.01 ??＜0.01 ??0.87 ??0.99 ??0.30 ??1.99 ??＜0.01 ??＜0.01 ??＜0.01
??3 ??0.48 ??＜0.01 ??＜0.01 ??0.92 ??1.05 ??0.50 ??2.50 ??＜0.01 ??＜0.01 ??＜0.01
??4 ??0.49 ??0.16 ??0.01 ??0.90 ??1.02 ??0.31 ??1.99 ??＜0.01 ??＜0.01 ??＜0.01
??5 ??0.78 ??0.26 ??＜0.01 ??0.76 ??0.66 ??0.51 ??0.51 ??0.03 ??＜0.01 ??＜0.01
??6 ??0.78 ??0.96 ??＜0.01 ??0.76 ??0.73 ??0.25 ??1.01 ??0.03 ??0.106 ??＜0.01
??7 ??0.76 ??0.97 ??0.11 ??0.29 ??0.71 ??0.25 ??0.20 ??0.13 ??＜0.01 ??＜0.01
??8 ??0.79 ??0.99 ??＜0.01 ??0.31 ??0.71 ??0.25 ??1.49 ??0.03 ??＜0.01 ??0.15
??9 ??1.07 ??0.92 ??0.21 ??0.31 ??0.49 ??0.25 ??0.20 ??0.02 ??＜0.01 ??＜0.01
Table 2
Performance after the simulation braze cycle
Alloy Conductivity [%IACS] Corrosion potential [mV SCE] ????UTS ????[MPa] ????0.2％PS ????[MPa]
????1 ????49.3 ????-783 ????137 ????53
????2 ????51.4 ????-779 ????143 ????59
????3 ????46.0 ????-786 ????149 ????57
????4 ????43.2 ????-778 ????134 ????54
????5 ????42.8 ????-732 ????142 ????56
????6 ????42.3 ????-770 ????156 ????70
????7 ????40.5 ????-748 ????166 ????76
????8 ????36.6 ????-805 ????154 ????67
????9 ????43.3 ????-747 ????161 ????69
9 kinds of different chemical property that provide in the table 1 are to cast and be sawn into 80 millimeters thin slice, are preheating to thereafter to be lower than 540 ℃, and described alloy does not homogenize.Carry out hot rolling and the cold rolling thickness that becomes 0.15 millimeter being lower than 540 ℃ subsequently.After process annealing, described thin slice is cold rolled to 0.1 millimeter thickness.
In the alloy 1-4 of table 1, there are not Ti, V, Cr or Zr.Known the same with prior art, existence can be by Sn and/or In (part) replacement with the Zn in the alloy.
Can see that alloy 4-9 is a comparative example, it does not meet alloys range of the present invention.The quantity of Mn is too high.In alloy 6,7 and 8, also there is the adding of Zr, Ti and V respectively.Increase although compare the Mn level of alloy 4-5 with alloy 1-3, its intensity is not significant to be increased.This is reducing owing to Ni.Alloy 6,7,8 shows, when Zr, Ti or V exist, adopts the level of the Ni of alloy 4-5 can reach high intensity.Yet because the interpolation of Mn, Zr, Ti or V among the alloy 4-9, the conductivity of these alloys is lower.
Have three alloy 1-3 that meet composition of the present invention and have high conductivity, sufficiently high intensity and corrosion potential, described corrosion potential is in necessary scope, to obtain described sacrificial anode effect.

Claims (19)

1, a kind of aluminium alloy that is used to make fin material has the composition of following weight percent:
Si≤1.2
Mn≤0.05
Mg≤0.05
Fe≤2.0
0.5≤Ni≤1.5
0.05≤Cu≤1.0
0.5≤Zn≤4.0 and/or 0.1≤Sn≤2.0 and/or 0.01≤In≤0.5
V≤0.40 and/or Ti＜0.01 and/or Cr＜0.01 and/or Zr＜0.01
Other element each at the most 0.05, and total amount at the most 0.15
Surplus is Al.
2, aluminium alloy according to claim 1 is characterized in that, the scope of Si is 0.4%-0.8%.
3, aluminium alloy according to claim 1 and 2 is characterized in that, Mn≤0.03%.
4, aluminium alloy according to claim 3 is characterized in that, Mn≤0.01%.
5, according to any one described aluminium alloy of claim 1 to 4, it is characterized in that Mg≤0.03%.
6, aluminium alloy according to claim 5 is characterized in that, Mg≤0.01%.
According to the described aluminium alloy of aforementioned arbitrary claim, it is characterized in that 7, the scope of Fe is 0.3%-1.6%, preferable range is 0.7%-1.3%.
According to the described aluminium alloy of aforementioned arbitrary claim, it is characterized in that 8, the scope of Ni is 0.8%-1.2%.
According to the described aluminium alloy of aforementioned arbitrary claim, it is characterized in that 9, the scope of Cu is 0.1%-0.8%, preferable range is 0.1%-0.6%.
According to the described aluminium alloy of aforementioned arbitrary claim, it is characterized in that 10, the scope of Zn is that the scope of 1.0%-3.0% and/or Sn is that the scope of 0.1%-1.0% and/or In is 0.01%-0.05%.
11, according to the described aluminium alloy of aforementioned arbitrary claim, it is characterized in that not having In and Sn to exist.
12, according to the described aluminium alloy of aforementioned arbitrary claim, it is characterized in that V＜0.01%.
13, the fin material of being made by the described aluminium alloy of aforementioned arbitrary claim is characterized in that, described fin material has conductivity after the soldering of 26MS/m (45%IACS) at least, is preferably 29MS/m (50%IACS) at least.
14, fin material according to claim 13, it is characterized in that, described fin material have with respect to SCE (ASTM G69) for-750mV and-corrosion potential between the 950mV, be preferably with respect to SCE (ASTM G69) for-750mV and-850mV between.
15, according to claim 13 or 14 described fin materials, it is characterized in that, described fin material have 135 and 155MPa between soldering after ultimate tensile strength.
According to claim 13,14 or 15 described fin materials, it is characterized in that 16, described fin material has 0.2% offset yield strength greater than 50MPa.
According to the described fin material of one of claim 13-16, it is characterized in that 17, described fin material has a coating layer in the one side at least, this coating layer has the lower fusing point than described fin material.
18, a kind of brazed metal heat exchanger, it has the radiator element that the described aluminium alloy of one of claim 1-12 is made.
19, a kind of brazed metal heat exchanger, it has the radiator element that the described fin material of one of claim 13-17 is made.
CNA028215192A 2001-10-05 2002-10-02 Aluminium alloy for making fin stock material Pending CN1578844A (en)

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
CN1578844A true CN1578844A (en) 2005-02-09

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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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CN101097124B (en) * 2006-06-30 2011-04-06 住友轻金属工业株式会社 Brazing fin material for heat exchangers, heat exchanger, and method of manufacturing same
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
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