CN101120117A - Heat exchanger member and production method thereof - Google Patents
Heat exchanger member and production method thereof Download PDFInfo
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- CN101120117A CN101120117A CNA2006800051524A CN200680005152A CN101120117A CN 101120117 A CN101120117 A CN 101120117A CN A2006800051524 A CNA2006800051524 A CN A2006800051524A CN 200680005152 A CN200680005152 A CN 200680005152A CN 101120117 A CN101120117 A CN 101120117A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- 239000000758 substrate Substances 0.000 claims abstract description 91
- 229910052751 metal Inorganic materials 0.000 claims abstract description 84
- 239000002184 metal Substances 0.000 claims abstract description 83
- 239000000843 powder Substances 0.000 claims abstract description 83
- 238000005260 corrosion Methods 0.000 claims abstract description 59
- 230000007797 corrosion Effects 0.000 claims abstract description 59
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 41
- 239000000956 alloy Substances 0.000 claims abstract description 41
- 239000010410 layer Substances 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000005507 spraying Methods 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002344 surface layer Substances 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims description 93
- 238000000034 method Methods 0.000 claims description 55
- 239000007921 spray Substances 0.000 claims description 50
- 238000005476 soldering Methods 0.000 claims description 30
- 239000004411 aluminium Substances 0.000 claims description 14
- 229910018137 Al-Zn Inorganic materials 0.000 claims description 12
- 229910018573 Al—Zn Inorganic materials 0.000 claims description 12
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000005219 brazing Methods 0.000 abstract description 13
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 13
- 230000003628 erosive effect Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000013528 metallic particle Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
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- 239000000155 melt Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 239000007789 gas Substances 0.000 description 1
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- 239000012535 impurity Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005649 metathesis reaction Methods 0.000 description 1
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- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
- F28F19/06—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of metal
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
In some embodiments of the invention, a heat exchanger member high in corrosion resistance and excellent in brazing performance can be stably produced at low cost. A production method of a heat exchanger member 2 to be brazed comprises the step of spraying particulate powder of metal less noble in corrosion potential than Al, an alloy of the metal or a composition of the metal at 150 DEG C or less at high speed onto a surface of a substrate 2a of aluminum or its alloy to thereby make the particulate powder adhere to the surface. The metal is diffused in the surface layer portion of the substrate 2a by the brazing heating to form a sacrificial corrosive layer.
Description
The application requires to enjoy in Japanese patent application No.2005-38518 that submitted on February 16th, 2005 and the U.S. provisional application S.N.60/654 that submits on February 23rd, 2005,963 right of priority, whole disclosure integral body of these two patent documents are incorporated in this as a reference.The cross reference of related application
The application is the application of submitting to according to 35U.S.C. § 111 (a), and it requires the U.S. provisional application S.N.60/654 in submission on February 23rd, 2005 according to 35U.S.C. § 111 (b), 963 applying date rights and interests according to 35U.S.C. § 119 (e) (1).
Technical field
The present invention relates to the heat exchanger member of the structure unit of the aluminum-made heat exchanger that a kind of conduct will make by method for brazing, relate in particular to a kind of like this member, this member is preferably used as need have good brazing property and corrosion proof member.The invention still further relates to the manufacture method of this heat exchanger member.
Background technology
Below explanation has been set forth the inventor to the correlation technique and the understanding of problem wherein, and should not be interpreted as the approval to prior art knowledge.
In order to improve the solidity to corrosion of aluminum-made heat exchanger, knownly, Zn forms sacrificial etched layer on the tube-surface by being sprayed to.But, in this Zn spray pipe, can't realize the adhering to of uniform and thin of Zn, this is because be difficult to carry out stable spraying with little adhesion amount.Even can realize this little adhesion amount, Zn also can't produce the admixture of attachment portion and non-attachment portion thus equably attached on the tube-surface.So, existing problems aspect the solidity to corrosion of pipe.If increase the adhesion amount of Zn in order to eliminate non-attachment portion, then Zn can accumulate on the weld seam of fin/pipe jointing part, and this can cause the preferential corrosion of weld seam again.
Given this, the method of adhering to equably as being used to Zn is approached, proposition reduces the adhesion amount of Zn or in a large number by using Zn displacement solder flux to make Zn thin and adhere to equably by spraying Al-Zn alloy, prevent with this that fin from separating and (for example see JP H04-15496, A, JP 2003-225760, A).
But, in the Al-Zn spraying method, have the problem of Al-Zn silk costliness.On the other hand, illustrate in the method for solder flux of Zn replacement(metathesis)reaction in use, this method need be used for the resin applying step that resin is applied as binding agent and be used for the resin decomposition step of decomposing resinous principle by heating when the soldering, changes and need carry out big equipment at heating steps.
As heat transfer tube, generally use and extrude member.But, existing on the surface of extruding pipe under the situation of parting line, braze can flow along parting line, and this can cause the erosion that is caused by braze.
Explanation to the merits and demerits of disclosed various features, embodiment, method and apparatus in other publication is by no means restriction the present invention in this article.In fact, special characteristic of the present invention can overcome specific shortcoming, still keeps some or all of feature disclosed herein, embodiment, method and apparatus simultaneously.
Can know from following preferred embodiment and to see other purpose of the present invention and advantage.
Summary of the invention
Make the present invention in view of the above-mentioned and/or other problem in the association area.The present invention can improve existing method and/or device significantly.
Among other potential advantage, some embodiment can provide brazing property excellence and the low heat exchanger member of cost.
Among other potential advantage, some embodiment can provide the manufacture method of the heat exchanger member that can stably produce.
The method that is used to make heat exchanger member according to the present invention has as in the structure described in the following clauses and subclauses [1] to [14].
[1] a kind of will being may further comprise the steps by the manufacture method of the heat exchanger member of soldering:
Particle powder with the synthetics/compound of the alloy of at a high speed that corrosion potential is low than Al metal, this metal or this metal under 150 ℃ or lower temperature sprays on the surface of the substrate of being made by aluminium or its alloy, makes described particle powder attached on the described surface thus.
[2] manufacture method of clauses and subclauses 1 described heat exchanger member as described above, wherein said substrate is to extrude member.
[3] manufacture method of clauses and subclauses 1 or 2 described heat exchanger members as described above, the particle diameter of wherein said particle powder is 100 μ m or littler.
[4] manufacture method of clauses and subclauses 1 or 2 described heat exchanger members as described above, the adhesion amount of wherein said metal are 0.3 to 6g/m
2
[5] manufacture method of clauses and subclauses 1 or 2 described heat exchanger members as described above, wherein said metal is Zn.
[6] manufacture method of clauses and subclauses 5 described heat exchanger members as described above, wherein said particle powder is Zn, Al-Zn alloy and KZnF
3Particle powder in any.
[7] manufacture method of clauses and subclauses 1 or 2 described heat exchanger members as described above, wherein the particle velocity when spraying is 100 to 400m/sec.
[8] manufacture method of clauses and subclauses 1 or 2 described heat exchanger members as described above wherein is used to spray the nozzle of spray equipment of described particle powder and the distance between the described substrate and is 10 to 200mm.
[9] manufacture method of clauses and subclauses 1 or 2 described heat exchanger members as described above, wherein said particle powder is 15 ° to 90 ° with respect to the input angle of described substrate.
[10] manufacture method of clauses and subclauses 1 or 2 described heat exchanger members as described above, the nozzle that wherein is used to spray the spray equipment of described particle powder are arranged to the angle to 135 ° vertical at 45 with respect to described substrate.
[11] manufacture method of clauses and subclauses 1 or 2 described heat exchanger members as described above, wherein use two or more nozzles that are used to spray described particle powder, and be 30 ° or littler with respect to the input angle of described substrate wherein, and be 60 ° or bigger with respect to the input angle of described substrate from the particle powder of at least one nozzle from the particle powder of at least one nozzle.
[12] manufacture method of clauses and subclauses 11 described heat exchanger members as described above is wherein by to become 30 ° or littler input angle to spray described particle powder and to carry out described spraying to become 60 ° or bigger input angle to spray described particle powder with respect to described substrate subsequently with respect to described substrate.
[13] manufacture method of clauses and subclauses 1 or 2 described heat exchanger members as described above, wherein said heat exchanger member is pipe.
[14] a kind of will being may further comprise the steps by the manufacture method of the heat exchanger member of soldering:
Particle powder with the synthetics of the alloy of at a high speed that corrosion potential is low than Al metal, this metal or this metal under 150 ℃ or lower temperature sprays on the surface of the substrate of being made by aluminium or its alloy, makes described particle powder attached on the described surface thus; And
Described particle powder attached to described suprabasil situation under the described substrate of heating, to form sacrificial etched layer in the surface layer part of described substrate by the described corrosion potential metal lower than Al is dispersed in.
Heat exchanger member according to the present invention has as following clauses and subclauses [15] and [16] described structure.
[15] a kind of heat exchanger member comprises:
The substrate of making by aluminium or its alloy, this substrate has a surface, is being attached with the particle powder of the synthetics of the alloy of the corrosion potential metal lower than Al, this metal or this metal by carry out high-velocity spray under 150 ℃ or lower temperature on the described surface of described substrate.
[16] a kind of heat exchanger member comprises:
The substrate of making by aluminium or its alloy; And
By under 150 ℃ or lower temperature, carry out the particle powder of synthetics that high-velocity spray makes the alloy of the corrosion potential metal lower than Al, this metal or this metal attached to the surface of described substrate on and the described metal of postheating so that be formed on the described lip-deep sacrificial etched layer of described substrate in the surface layer part of this metal diffusing in described substrate.
[17] a kind of heat exchanger and manufacturing method thereof may further comprise the steps:
The preparation pipe, every pipe comprises the substrate of being made by aluminium or its alloy, this substrate has a surface, is being attached with the particle powder of the synthetics of the alloy of the corrosion potential metal lower than Al, this metal or this metal by carry out high-velocity spray under 150 ℃ or lower temperature on the described surface of described substrate;
By under described pipe and situation that collection (pipe) case links to each other, being arranged alternately described pipe and fin and assemble a core temporarily to form interim assembly; And
Heat described interim assembly, be used for making described corrosion potential than the low metal diffusing of Al to the surface layer part of described substrate forming sacrificial etched layer, and be used to make described pipe, fin with the collection case soldering be in the same place.
Heat exchanger and manufacturing method thereof according to the present invention has as the described structure of following clauses and subclauses [18].
[18] a kind of heat exchanger and manufacturing method thereof, described heat exchanger has a core, pipe and fin is arranged alternately and mutually soldering in this core, and described pipe with collect case and be connected with soldering and be in the same place, said method comprising the steps of:
The preparation pipe, every pipe comprises the substrate of being made by aluminium or its alloy, this substrate has a surface, is being attached with the particle powder of the synthetics of the alloy of the corrosion potential metal lower than Al, this metal or this metal by carry out high-velocity spray under 150 ℃ or lower temperature on the described surface of described substrate; And
The core of heating one interim assembling, be used for making described corrosion potential than the low metal diffusing of Al to the surface layer part of described substrate to form sacrificial etched layer.
By clauses and subclauses [1] are described according to the method that is used to make heat exchanger of the present invention as described above, by with corrosion potential than the low metal spraying of Al to substrate surface, can make described metal foil and equably attached on the described surface.Owing to make described metal form sacrificial etched layer by heating, so can produce the heat exchanger member of corrosion resistance excellent.In addition, described metal adheres at normal temperatures, and this has simplified the equipment and the step of manufacturing heat exchanger, and can make heat exchanger with low cost.
According to described the present invention of clauses and subclauses [2] as described above, can remove and be present in suprabasil parting line.
According to described the present invention of clauses and subclauses [3] as described above, can make particle powder attached to not causing any scratch in the substrate.
According to clauses and subclauses [4], [5] and [6] described the present invention as described above, can obtain solidity to corrosion preferably.
According to clauses and subclauses [7] and [8] described the present invention as described above, the deposit efficiency of particle powder is good.
According to described the present invention of clauses and subclauses [9] as described above, the deposit efficiency of particle powder is good and can fully remove parting line.
According to described the present invention of clauses and subclauses [10] as described above, can fully remove parting line.
According to every described the present invention of clauses and subclauses [11] and [12] as described above, the deposit efficiency of particle powder is good and can fully remove parting line.
According to described the present invention of clauses and subclauses [13] as described above, can produce the pipe of corrosion resistance excellent.
According to described the present invention of clauses and subclauses [14] as described above, in the surface layer part of substrate, form sacrificial corrosion resistant layer thus attached to the metal diffusing on the substrate surface.
According to each described heat exchanger member of the present invention of clauses and subclauses [15] and [16] as described above, can obtain excellent solidity to corrosion.
According to described the present invention of clauses and subclauses [17] as described above, in the surface layer part of substrate, form sacrificial corrosion resistant layer thus attached to the metal diffusing on the substrate surface.Thereby can obtain excellent solidity to corrosion.
The described heat exchanger according to the present invention of clauses and subclauses [18] heat exchanger that is corrosion resistance excellent as described above, this heat exchanger has sacrificial corrosion resistant layer on substrate surface.
Description of drawings
In the accompanying drawings as example and the unrestricted the preferred embodiments of the present invention that illustrate, wherein:
Fig. 1 is the front view that the embodiment that wants the heat exchanger that goes out constructed in accordance is shown;
Fig. 2 is the sectional view that illustrates according to the embodiment of heat exchanger member of the present invention;
Fig. 3 is the explanatory that is illustrated in according to the input angle α of particle powder in the heat exchanger member manufacture method of the present invention;
Fig. 4 is illustrated in according to the nozzle of spray equipment in the heat exchanger member manufacture method of the present invention explanatory with respect to the layout angle β of substrate;
Fig. 5 is the explanatory that the nozzle layout example among the embodiment is shown.
Embodiment
In the following passage, preferred embodiments more of the present invention will be as example and unrestricted being illustrated.Should be appreciated that according to present disclosure those skilled in the art can make various other modifications based on these illustrated embodiments.
Want heat exchanger member made according to the method for the present invention to be fixed on other member by soldering, and be a kind of like this member, wherein corrosion potential is than on the low surface of metal attached to the substrate that constitutes described member of Al.In being attached with the heat exchanger member of described metal, described metal is diffused in the surface layer part of substrate by the i.e. heating when the soldering of heating, forms sacrificial etched layer thus.
The present invention can be applicable to any heat exchanger member.For example, in heat exchanger as shown in Figure 1, will manage 2 and fin 3, manage 2 and collect the core of case 4 solderings together formation heat exchanger 1 under 2 end and the state that corresponding collection case 4 links to each other by being arranged alternately and managing at pipe 2 and fin 3.According to heat exchanger member of the present invention can be the pipe 2, fin 3 and the collection case 4 any one.Wherein, can preferably be applied to manage 2.In heat exchanger as shown in Figure 1, side plate 5 solderings are on outermost fin 3.
As shown in Figure 2, under the state before soldering, on the surface of pipe 2 the substrate 2a that makes by aluminium or its alloy, form the metal adhesion layer 10 of metallic particles powder.By the soldering heating, the metal that constitutes metal adhesion layer 10 will be diffused among the substrate 2a, to form sacrificial etched layer.
In the present invention, should be understood that heat exchanger member is not limited to described pipe, also can be fin, collection case etc.Although the manufacture method of substrate 2a is not particularly limited,, following reason substrate 2a extrudes member owing to can being preferably.That is,, can remove parting line by the high-velocity spray particle powder as illustrating after a while, thus the present invention for the application of extruding member with significant.
The material of substrate 2a is unrestricted, so long as aluminium or its alloy get final product, and can adopt any known material.As the material of pipe, can recommend to use JIS 1xxx series alloys, the aluminium alloy that comprises a small amount of Cu and Mn, JIS 3xxx series alloys.As the material of fin, can recommend to use the aluminium alloy that in JIS 3xxx series alloys, has added Zn.As the material of collection case, can recommend to use JIS 3003 alloys.
Metal adhesion layer 10 can so form at normal temperatures, promptly for example by with the nozzle of spray equipment in conjunction with carrier gases with high-velocity spray metallic particles powder, make the surface of particle powder impact basement 2a, thus attached on this surface.Because spraying is to carry out that so compare with the situation that forms the metal adhesion layer by the thermospray metal-powder, metal-powder can adhere to thinlyyer and be even under 150 ℃ or lower temperature.
The metal that constitutes metal adhesion layer 10 can form sacrificial etched layer under this corrosion of metal current potential situation lower than Al.As this metalloid, can exemplify out Zn, In and Sn.Wherein, recommend to use Zn owing to cost is low.These metals can be used as alloy or synthetics and metal simple-substance and use.Under the situation of using Zn, can exemplify out Al-Zn alloy, KZnF
3, ZnF
2And ZnCl
2Wherein, can recommend Zn, Al-Zn alloy and KZnF
3Any.As for particle powder, can use the combination of a type powder or broad variety powder.
Although the particle diameter of particle powder is not particularly limited, if particle diameter is excessive, then particle can be cut among the substrate 2a deeply, causes substrate 2a impaired.Preferred particle diameter is 100 μ m or littler, more preferably 50 μ m or littler.The adhesion amount of metal should be guaranteed solidity to corrosion and preferably be in 0.3 to 6g/cm
2Scope in.If it is less than 0.3g/m
2, then can't obtain sufficient solidity to corrosion.Otherwise, if it surpasses 6g/m
2, then welding seam part branch preferentially is corroded, and this is uneconomic.More preferably, adhesion amount is in 1 to 5g/m
2Scope in.Make metal as any of metal simple-substance, alloy and synthetics attached to the situation on the substrate 2a under, above-mentioned adhesion amount is represented the net content of metallic element.For example, make Al-Zn alloy or KZnF
3Under the situation on the substrate 2a, above-mentioned adhesion amount is represented the amount of Zn.
The preferred spraying condition of particle powder is as follows.
Particle velocity during the sprayed particle powder is a factor of adhering to that influences particle powder, is preferably set to 100 to 400m/sec.The amount of non-cohesive particle powder on substrate 2a increases if particle velocity less than 100m/sec, then drops, and causes low deposit efficiency, and this is uneconomic.On the other hand, if particle velocity surpasses 400m/sec, then be not preferred, this is because high velocity particle can cause substrate 2a distortion owing to its bump.More preferably, particle velocity is in 100 to 250m/sec the scope.
The nozzle 20 of the spray equipment shown in Fig. 3 and the distance D between the substrate 2a are factors that influences particle velocity, and particle velocity can influence adhering to of particle powder again.Therefore, preferably nozzle 20 is arranged to make distance D between nozzle 20 and the substrate 2a to be in 10 to 200mm the scope.If distance D is less than 10mm, then particle powder can't fully quicken.On the other hand, if distance D surpasses 200mm, then atmospheric drag can make particle velocity reduce.Therefore, outside described scope, can cause deposit efficiency to reduce.More preferably, the distance between nozzle 20 and the substrate 2a is in 20 to 150mm scope.
Particle powder shown in Fig. 3 influences the deposit efficiency of particle powder and a factor of parting line smoothing with respect to the input angle α of substrate 2a, preferably is in 15 ° to 90 ° the scope.More preferably, it is less than 90 °.If have parting line extruding on the surface of member, then the braze that melts during soldering can be along parting line and the specific position of leading, and this can cause the erosion to these positions.Therefore, preferably form metal adhesion layer 10 to eliminate parting line by the sprayed particle powder.If the input angle α of particle powder is less than 15 °, then a large amount of particles because less input angle can drop from the surface of substrate 2a, cause deposit efficiency to reduce after bump.On the other hand, if input angle α is 90 °, the weak effect of parting line smoothing then, this can cause parting line to remove insufficiently.Preferred input angle α is 15 ° to 65 °.Do not have on the member not have in parting line or the substrate to cause that input angle is unrestricted under the situation of erosive scratch extruding.
Nozzle shown in Fig. 4 with respect to substrate 2a longitudinally angle beta be that parting line when influencing soldering is removed and corroded a factor that produces.Angle beta is preferably set to 45 ° to 135 °.If angle beta is less than 45 ° or surpass 135 °, then possibly can't fully remove parting line, and because spraying may longitudinally form the linear depression part.If parting line retains or form the linear depression part, then the braze that melts during soldering can be caused that erosive produces by parting line or the linear depression specific position of partly leading.Nozzle 20 is 60 ° to 120 ° with respect to the preferred longitudinally angle beta of substrate 2a.Under situation against the substrate 2a sprayed particle powder of advancing, the direct of travel of vertical expression shown in arrow among Fig. 4 of substrate 2a.
The high-velocity spray of particle powder can use two or more nozzles to carry out with respect to a surface.Using under the situation of two or more nozzles, can be by guarantee the elimination with parting line of adhering to of particle powder from a plurality of different angles sprayed particle powder.In detail, for example, carry out from the high-velocity spray of at least one nozzle eliminating parting line, carry out high-velocity spray from least one nozzle to guarantee the metal adhesion amount with 60 ° or bigger input angle with 30 ° or littler input angle.Under the situation of using three or more nozzle, the quantity that is used for the nozzle of corresponding input angle can be set arbitrarily.Preferably, at first by eliminating parting line with 30 ° or littler input angle sprayed particle powder, by guaranteeing the metal adhesion amount with 60 ° or bigger input angle sprayed particle powder, this is because can eliminate parting line effectively and guarantee the metal adhesion amount subsequently.
Although be used for being not particularly limited, can exemplify out air, nitrogen, carbon dioxide and argon gas with the type of the carrier gases of high-velocity spray particle powder.In order to prevent the oxidation of particle powder, preferably in nonoxidizing atmosphere such as nitrogen atmosphere or argon atmospher, spray.
In heat exchanger member shown in Figure 22, metal adhesion layer 10 is formed on each of upper and lower surface of substrate 2a.But it is in the present invention, unrestricted with the quantity and the lip-deep spraying area on the surface of high-velocity spray particle powder.High-velocity spray can be applicable to arbitrary surfaces and arbitrary region.
Because above-mentioned high-velocity spray will be carried out under 150 ℃ or lower temperature, so but compare simplified apparatus and step with traditional thermospray, can make heat exchanger member with low cost thus.In addition, high-velocity spray can be simplified step, just can obtain excellent tack because need not carry out any pre-treatment particle powder to substrate surface.
Heat exchanger 1 by heating by pipe 2, fin 3 and the interim assembly that constitutes of collection case 4 so that their solderings are created together.Heating temperature during soldering is preferably 580 ℃ to 620 ℃.Because the diffusion of metal, sacrificial etched layer can form by the heating of 400 ℃ or higher temperature.Heating during soldering causes sacrificial etched layer the distortion at the surface layer part place of pipe 2.Because this sacrificial etched layer, it is excellent that the solidity to corrosion of heat exchanger 1 of the present invention becomes.
Example
[example]
As the material of the substrate 2a of heat transfer tube 2, use JIS 1xxx series alloys (surplus is Al and unavoidable impurities for Cu:0.4mass%, Mn:0.2mass%).Aluminum alloy blank to above-mentioned synthetics carries out soaking (processing), extrude then into as shown in Figure 2 porous flat tube 2a (width W: 16mm, height H: 3mm, thickness T: 0.5mm), to form roll.
Then, as shown in Figure 5, in the porous flat tube 2a unwinding that makes coiling from the nozzle 20 of the position, above and below that is arranged on pipe 2a under 150 ℃ or lower temperature with at a high speed with various metallic particles powder sprayings to the upper and lower flat surfaces of pipe 2a.The material of used particle powder and particle diameter are as shown in table 1 in each example.
In example 1 to 9, upper spray nozzle 20 and following nozzle 20 have been used.Each nozzle is arranged so that the angle beta with respect to vertical (direct of travel) of porous flat tube 2a (see figure 4) is set at 20 ° (examples 7) or 90 ° (example except that example 7), and will spray angle between axis and the flat surfaces by nozzle 20 is tilted with respect to the flat surfaces of flat tube 2a be that the input angle α (see figure 3) of particle powder is set at 90 ° (examples 6) or 45 ° (example except that example 6).
In example 10 to 12, two nozzles 20 are separately positioned on position, the above and below (not shown) of pipe along the direct of travel of porous flat tube 2a.Each nozzle 20 is arranged so that the angle beta with respect to vertical (direct of travel) is set at angle as shown in table 1.In addition, particle powder is set at angle as shown in table 1 respectively at the input angle α of pipe 2a above and below.That is, particle powder sprays with two different angles under high speed.Carry out the less high-velocity spray of input angle earlier, carry out the bigger high-velocity spray of input angle again.Distance and particle velocity between each nozzle 20 and the porous flat tube 2a are set as shown in table 1ly.
By the above-mentioned high-velocity spray of particle powder, on each of the upper and lower flat surfaces of porous flat tube 2a, all form metal adhesion layer 10.The clean adhesion amount of Zn is as shown in table 1.After high-velocity spray, will manage 2a and cut into predetermined length, obtain managing 2 thus.
[comparative example 1]
As the material of perforated tube, use with example in identical aluminium alloy.Spray nozzle is arranged on the outlet side of forcing machine.On the upper and lower flat surfaces of the porous flat tube 2a that extrudes, use Al-Zn alloy silk to carry out the Al-Zn spraying.In cooling water tank, after the cooling, will manage the 2a continuous reeling.The Zn adhesion amount of Al-Zn spraying is as shown in table 1.Then, when unwinding, the pipe of reeling is cut into predetermined length to obtain pipe.
[comparative example 2]
Use with example in identical aluminium alloy as the material of porous flat tube, extruding cellular flat tube 2a also is cut to predetermined length.
On the upper and lower flat surfaces of porous flat tube, apply synthetics, wherein KZnF
3With mix as the acrylic resin of binding agent quality ratio with 1: 2.The Zn adhesion amount is as shown in table 1.
Pipe 2, brazing fin 3 and collection case 4 that each example manufactures are assembled also soldering subsequently together to obtain heat exchanger 1 as shown in Figure 1 temporarily.The soldering heating is carried out under the condition of 600 ℃ * 10min.This heating causes Zn to be diffused in the surface layer part of pipe 2, forms sacrificial etched layer thus.
With the pipe of comparative example 1, brazing fin 3 and the 4 interim assemblings of collection case and subsequently by the heating of 600 ℃ * 10min soldering together to obtain heat exchanger 1.
Use the pipe of comparative example 2, obtain heat exchanger by carrying out soldering in the same manner as described above.By this heating, coated KZnF
3In Zn diffusion, form sacrificial etched layer in surface layer part thus.
For the good heat exchanger of each soldering, estimate solidity to corrosion and brazing property (erosion) by following test method.
＜solidity to corrosion 〉
The SWAAT that each heat exchanger that is obtained is carried out stipulating in ASTM-G85-A3 tests.As corrosion test liquid, use by being adjusted to the test(ing) liquid of pH3 in the synthetic sea water that acetate is added ASTM D1141.Tested 480 hours by the circulation that repeated to spray 0.5 hour and preserved moisture 1.5 hours.In addition, for the test specimen that after 480 hours corrosion test, has obtained excellent results,, be total up to 960 hours corrosion resistant test by another corrosion test of 480 hours.
After above-mentioned corrosion resistant test, solidity to corrosion is estimated.
◎: preferential corrosion does not take place in weld seam; The result of corrosion test (960 hours corrosion tests) is better when long
Zero: maximum corrosion depth is roughly suitable with above-mentioned (being ◎); The result of main corrosion resistant test (480 hours corrosion tests) is good
△: maximum corrosion depth is not less than 150 μ m, but is not more than 250 μ m
*: produce spot corrosion; Depth of corrosion is 200 μ m or bigger
＜brazing property (erosion) 〉
By following standard evaluation brazing property based on erosion generation state.
◎: do not observe erosion
Zero: producing thickness in tube wall is 10 μ m or littler erosion
△: in tube wall, produce thickness more than or equal to 10 μ m but smaller or equal to the erosion of 50 μ m
*: corrode and run through tube wall, or generation thickness is 50 μ m or bigger erosion in tube wall
Table 1
*1:Al-Zn thermospray silk, the cost height
*2: need be used for the equipment of dissolving binding agent when soldering, need carry out condition enactment
In the pipe of each example, a spot of Zn evenly on the surface attached to substrate, causes thin and uniform sacrificial etched layer by the soldering heating.Can confirm from the result shown in the table 1, obtain excellent solidity to corrosion and brazing property by formed sacrificial etched layer.In addition, and form sacrificial etched layer by thermospray in the comparative example 1 and compare, cost decreases.In comparative example 2, because brazing quality is very poor under equipment and the condition situation identical with the present invention, so needn't carry out corrosion resistant test.
Industrial applicibility
Therefore the solidity to corrosion and the brazing property excellence of the heat exchanger member of making by method of the present invention can be preferably applied to the structure unit of various types of heat exchangers.
Although can implement the present invention with multiple different form, but a plurality of exemplary embodiments are described be based on such understanding in this article, promptly present disclosure has only provided the example of the principle of the invention and these examples are not intended to limit the invention in explanation herein and/or the illustrative preferred embodiment herein.
Although exemplary embodiment of the present invention is illustrated at this, but the present invention is in no way limited in herein in the various preferred embodiments of explanation, but comprise arbitrarily and all have on the basis of present disclosure can be by the key element of the equivalence that those skilled in the art understood, modification, omission, combination (for example combination of the different aspect of different embodiment), the embodiment that improves and/or change.Qualification in the claim should be done extensive interpretation based on employed language in the claim, but not is limited in example illustrated in this specification sheets or the application's the practice, and it is monopolistic that these examples should be interpreted as right and wrong.For example, in this disclosure, term " preferably " right and wrong are monopolistic, and its meaning is " preferably, but be not restricted to ".In this disclosure with the application's practice process in, device adds the limiting mode that function or step add function only to be adopted under these circumstances, promptly a certain specific claim is limited all existence in this qualifications of following all conditions: a) clearly narrated " be used for ... device " or " be used for ... step "; B) clearly narrated function corresponding; And c) not narrative structure, material or support the action of this structure.In this disclosure with the application's practice process in, term " the present invention " or " invention " can be used as the speech to one or more aspect in the disclosure.Term " the present invention " or " invention " should be interpreted as the judgement to criticality irrelevantly, should be interpreted as being applicable to all aspects or embodiment (being to be understood that promptly the present invention has many aspects and embodiment) irrelevantly, and should be interpreted as limiting the scope of the application or claim irrelevantly.In this disclosure with the application's practice process in, term " embodiment " can be used for illustrating any aspect, feature, method or step and their any combination, and/or their any part, or the like.In some examples, different embodiment can comprise the multiple feature.In the disclosure and in the practice process of this case, can adopt the term of following abbreviation: " e.g. " refers to " for example ", and " NB " refers to " attention ".
Claims (18)
1. one kind will be may further comprise the steps by the manufacture method of the heat exchanger member of soldering:
Particle powder with the synthetics of the alloy of at a high speed that corrosion potential is low than Al metal, this metal or this metal under 150 ℃ or lower temperature sprays on the surface of the substrate of being made by aluminium or its alloy, makes described particle powder attached on the described surface thus.
2. the manufacture method of heat exchanger member as claimed in claim 1 is characterized in that, described substrate is to extrude member.
3. the manufacture method of heat exchanger member as claimed in claim 1 or 2 is characterized in that, the particle diameter of described particle powder is 100 μ m or littler.
4. the manufacture method of heat exchanger member as claimed in claim 1 or 2 is characterized in that, the adhesion amount of described metal is 0.3 to 6g/m
2
5. the manufacture method of heat exchanger member as claimed in claim 1 or 2 is characterized in that, described metal is Zn.
6. the manufacture method of heat exchanger member as claimed in claim 5 is characterized in that, described particle powder is Zn, Al-Zn alloy and KZnF
3Particle powder in any.
7. the manufacture method of heat exchanger member as claimed in claim 1 or 2 is characterized in that, when spraying particle velocity be 100 to 400m/sec.
8. the manufacture method of heat exchanger member as claimed in claim 1 or 2 is characterized in that, is used to spray the nozzle of spray equipment of described particle powder and the distance between the described substrate and is 10 to 200mm.
9. the manufacture method of heat exchanger member as claimed in claim 1 or 2 is characterized in that, described particle powder is 15 ° to 90 ° with respect to the input angle of described substrate.
10. the manufacture method of heat exchanger member as claimed in claim 1 or 2 is characterized in that, the nozzle that is used to spray the spray equipment of described particle powder is arranged to the angle to 135 ° vertical at 45 with respect to described substrate.
11. the manufacture method of heat exchanger member as claimed in claim 1 or 2, it is characterized in that, use two or more nozzles that are used to spray described particle powder, and be 30 ° or littler with respect to the input angle of described substrate wherein, and be 60 ° or bigger with respect to the input angle of described substrate from the particle powder of at least one nozzle from the particle powder of at least one nozzle.
12. the manufacture method of heat exchanger member as claimed in claim 11, it is characterized in that, by to become 30 ° or littler input angle to spray described particle powder with respect to described substrate and to carry out described spraying to become 60 ° or bigger input angle to spray described particle powder with respect to described substrate subsequently.
13. the manufacture method of heat exchanger member as claimed in claim 1 or 2 is characterized in that, described heat exchanger member is pipe.
14. one kind will be may further comprise the steps by the manufacture method of the heat exchanger member of soldering:
Particle powder with the synthetics of the alloy of at a high speed that corrosion potential is low than Al metal, this metal or this metal under 150 ℃ or lower temperature sprays on the surface of the substrate of being made by aluminium or its alloy, makes described particle powder attached on the described surface thus; And
Described particle powder attached to described suprabasil situation under the described substrate of heating, to form sacrificial etched layer in the surface layer part of described substrate by the described corrosion potential metal lower than Al is dispersed in.
15. a heat exchanger member comprises:
The substrate of making by aluminium or its alloy, this substrate has a surface, makes on the described surface of particle powder attached to described substrate of synthetics of the alloy of the corrosion potential metal lower than Al, this metal or this metal by carry out high-velocity spray under 150 ℃ or lower temperature.
16. a heat exchanger member comprises:
The substrate of making by aluminium or its alloy; And
Sacrificial etched layer, by under 150 ℃ or lower temperature, carry out the particle powder of synthetics that high-velocity spray makes the alloy of the corrosion potential metal lower than Al, this metal or this metal attached to the surface of described substrate on and the described metal of postheating so that form on the described surface in described substrate in the surface layer part of this metal diffusing in described substrate should sacrificial etched layer.
17. the manufacture method of a heat exchanger may further comprise the steps:
The preparation pipe, every pipe comprises the substrate of being made by aluminium or its alloy, this substrate has a surface, makes on the described surface of particle powder attached to described substrate of synthetics of the alloy of the corrosion potential metal lower than Al, this metal or this metal by carry out high-velocity spray under 150 ℃ or lower temperature;
Assemble a core by under described pipe and collection case situation about linking to each other, being arranged alternately described pipe and fin, to form interim assembly temporarily; And
Heat described interim assembly, be used for making described corrosion potential than the low metal diffusing of Al to the surface layer part of described substrate forming sacrificial etched layer, and be used to make described pipe, fin with the collection case soldering be in the same place.
18. the manufacture method of a heat exchanger, described heat exchanger has a core, pipe and fin is arranged alternately and mutually soldering in this core, and described pipe with collect case and be connected with soldering and be in the same place, said method comprising the steps of:
The preparation pipe, every pipe comprises the substrate of being made by aluminium or its alloy, this substrate has a surface, makes on the described surface of particle powder attached to described substrate of synthetics of the alloy of the corrosion potential metal lower than Al, this metal or this metal by carry out high-velocity spray under 150 ℃ or lower temperature; And
The core of heating one interim assembling, be used for making described corrosion potential than the low metal diffusing of Al to the surface layer part of described substrate to form sacrificial etched layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP038518/2005 | 2005-02-16 | ||
| JP2005038518 | 2005-02-16 | ||
| US60/654,963 | 2005-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101120117A true CN101120117A (en) | 2008-02-06 |
Family
ID=39055610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800051524A Pending CN101120117A (en) | 2005-02-16 | 2006-02-16 | Heat exchanger member and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101120117A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101945726A (en) * | 2007-12-18 | 2011-01-12 | 昭和电工株式会社 | Process for producing member for heat exchanger and member for heat exchanger |
| CN102066046A (en) * | 2008-06-20 | 2011-05-18 | 苏威氟有限公司 | Fluidizable potassium fluorozincate |
| CN109425241A (en) * | 2017-09-05 | 2019-03-05 | 株式会社京滨冷暖科技 | Heat exchanger |
| WO2020052622A1 (en) * | 2018-09-14 | 2020-03-19 | 杭州三花微通道换热器有限公司 | Method for manufacturing heat exchanger, method for treating joint, and method for welding joint to connecting pipe |
-
2006
- 2006-02-16 CN CNA2006800051524A patent/CN101120117A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101945726A (en) * | 2007-12-18 | 2011-01-12 | 昭和电工株式会社 | Process for producing member for heat exchanger and member for heat exchanger |
| CN102066046A (en) * | 2008-06-20 | 2011-05-18 | 苏威氟有限公司 | Fluidizable potassium fluorozincate |
| CN109425241A (en) * | 2017-09-05 | 2019-03-05 | 株式会社京滨冷暖科技 | Heat exchanger |
| WO2020052622A1 (en) * | 2018-09-14 | 2020-03-19 | 杭州三花微通道换热器有限公司 | Method for manufacturing heat exchanger, method for treating joint, and method for welding joint to connecting pipe |
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