CN1726114A - Aluminum alloy brazing material, brazing member, brazed article and brazinh method therefor using said material, brazing heat exchanging tube, heat exchanger and manufacturing method thereof using sai - Google Patents
Aluminum alloy brazing material, brazing member, brazed article and brazinh method therefor using said material, brazing heat exchanging tube, heat exchanger and manufacturing method thereof using sai Download PDFInfo
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- CN1726114A CN1726114A CN 200380105977 CN200380105977A CN1726114A CN 1726114 A CN1726114 A CN 1726114A CN 200380105977 CN200380105977 CN 200380105977 CN 200380105977 A CN200380105977 A CN 200380105977A CN 1726114 A CN1726114 A CN 1726114A
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Abstract
A heat exchanger 10 includes a brazing heat exchanging tube S and a fin 4. The heat exchanging tube S and the fin 4 are brazed with each other via the brazing layer 11 of the heat exchanging tube S. The brazing layer 11 is formed by spraying of a brazing material consisting of Si: 6 to 15 mass%, Zn :1 to 20 mass%, at least one of Cu: 0.3 to 0.6 mass% and Mn: 0.3 to 1. 5 mass, and the balance being aluminum and inevitable impurities.
Description
The application requires Japanese patent application No.2002-361130 that submitted on December 12nd, 2002 and the U.S. Provisional Patent Application No.60/451 that submitted on March 4th, 2003,262 priority, described disclosure at this by all in conjunction with as a reference.
The cross reference of related application
The application proposes according to 35U.S.C. § 111 (a), and requires the U.S. Provisional Patent Application No.60/451 of on March 4th, 2003 according to 35U.S.C. § 111 (b) submission, 262 priority according to 35U.S.C. § 119 (e) (1).
Technical field
The present invention relates to a kind of aluminium alloy (firmly) brazing material, a kind of brazing member, a kind of soldering goods and manufacture method thereof of using this brazing member.The invention still further relates to a kind of heat-exchange tube, a kind of manufacture method of using heat exchanger and this heat exchanger of this heat-exchange tube, this heat-exchange tube need have resistance to corrosion so that for example using in the aluminum or aluminum alloy heat exchanger as radiator, condenser and evaporimeter in automobile, family expenses or the business air conditioner equipment.
Background technology
As everyone knows, the heat exchanger with heat exchange core portion can be used in the condenser or evaporimeter that automobile radiators, cooler use, in this heat exchange core portion the aluminum flat heat exchange tubes and corrugated fin is arranged alternately and mutually soldering be integral.
When making this heat exchanger, well-known technology is the corrosion that prevents heat-exchange tube by the preferential corrosion of angle welding, or form a zinc (Zn) diffusion layer, thereby the sacrificial etched corrosion that improves heat exchanger by surface layer part in the surface layer part of heat-exchange tube.According to a kind of known method, for example, the Al-Si-Zn series alloy brazing material of fusing is ejected on the surface of heat-exchange tube to form a brazing layer, utilize then this brazing layer with fin brazed to this heat-exchange tube, thereby connect fin and form the zinc diffusion layer and (for example see special 9 to 12 row of opening table 4 among the flat No.S59-10467 and the 3rd page of hurdle, lower-left, the claim 1 of Japan Patent No.2515561 etc., and the special claim 1 of opening flat No.H7-174482 etc.).
For the oil cooler pipe, sometimes can be with the Al-Si-Cu-Zn series alloy as low melting point brazing material (for example, the spy opens the claim 3 of flat No.H10-265881 etc.).
Have in the situation of the heat-exchange tube of the above-mentioned Al-Si-Zn series alloy brazing material that comprises a large amount of Zn or the heat-exchange tube that injection has Zn in injection, although separate owing to fin appears in the preferential corrosion of angle welding, if the time that the deferrable fin separates just think the resistance to corrosion that can improve whole heat exchanger.In addition, because the existing heat exchanger corrosion depth of Zn diffusion layer is bigger.Therefore, under the situation of the less heat-exchange tube of recently available thickness, be difficult to guarantee enough effective thickness.
In addition, state in the use when opening the disclosed Al-Si-Cu-Zn series alloy of flat No.H10-265881 brazing material by the spy, owing to for reducing alloy melting point and improve the generation that a large amount of Cu (0.7 to 0.8 quality %) that the flowability of brazing material comprises has caused intercrystalline corrosion, thus aspect resistance to corrosion existing problems.
Even intercrystalline corrosion does not take place, the Cu that add to surpass 0.7 quality % in brazing material also can damage self resistance to corrosion and with spot corrosion.Therefore this brazing material is not suitable for above-mentioned light wall pipe.
During other soldering goods outside the soldering goods of brazed metal heat exchanger, also the problems referred to above can appear.
Summary of the invention
Consider above-mentioned technical background, the present invention aim to provide a kind of because can suppress brazing member separate and reduce corrosion depth because of sacrificial etched aluminium alloy brazing material as the anticorrosion brazing material, a kind of brazing member that uses this aluminium alloy brazing material, a kind of soldering goods that use this brazing member, a kind of method of making these soldering goods, a kind of soldering heat-exchange tube, a kind of heat exchanger and a kind of method of making this heat exchanger of using this heat-exchange tube.
Aluminium alloy brazing material according to the present invention by under list (1) and limit to (5):
(1) a kind of aluminium alloy brazing material mainly comprises:
Si:6-15 quality %;
Zn:1-20 quality %;
0.3-0.6 at least a among the Mn of the Cu of quality % and 0.3-1.5 quality %; And
All the other are Al and impurity.
(2) as above-mentioned (1) described aluminium alloy brazing material, wherein the content of Si is 6-12.5 quality %.
(3) as above-mentioned (1) or (2) described aluminium alloy brazing material, wherein the content of Zn is 2-7 quality %.
(4) as each described aluminium alloy brazing material in above-mentioned (1) to (3), wherein the content of Cu is 0.4-0.55 quality %.
(5) as each described aluminium alloy brazing material in above-mentioned (1) to (4), wherein the content of Mn is 0.4-1 quality %.
According to brazing member of the present invention, soldering goods and the method for making these soldering goods by under list (6) and limit to (9):
(6) a kind of brazing member comprises that aluminum or aluminum alloy base material and is formed on the brazing layer of this substrate surface, and wherein this brazing layer is the jetted layers by the aluminium alloy brazing material that each limited in aforementioned (1) to (5).
(7) a kind of soldering goods comprise:
The brazing member that is limited by aforementioned (6); And
One fastener,
Wherein, this brazing member is in the same place by the brazing layer soldering of this brazing member with this fastener.
(8) a kind of soldering product and making method may further comprise the steps:
By preparing brazing member to form brazing layer on the surface that will be ejected into the aluminum or aluminum alloy base material by the aluminium alloy brazing material that each limited in aforementioned (1) to (5); And
With compound mode brazing member and another fastener are heated by described brazing layer this brazing member and this fastener soldering are in the same place.
(9) (8) described soldering product and making method as described above, wherein soldering step is carried out under normal pressure.
Soldering heat-exchange tube according to the present invention by under list (10) and limit to (15):
(10) a kind of soldering heat-exchange tube comprises:
One aluminum or aluminum alloy heat-exchange tube base material; And
One is formed on the brazing layer of this heat-exchange tube substrate surface,
Wherein, this brazing layer is the jetted layers by the aluminium alloy brazing material that each limited in aforementioned (1) to (5).
(11) (10) described soldering heat-exchange tube as described above, wherein said heat-exchange tube base material is made by JIS A1000 series alloy.
(12) (10) described soldering heat-exchange tube as described above, wherein said heat-exchange tube base material is made by JIS A3003 series alloy.
(13) (10) described soldering heat-exchange tube as described above, wherein said heat-exchange tube base material surpasses 0.2 quality % but is no more than the Cu of 0.6 quality % and the Al-Cu-Mn series alloy of the Mn of 0.15-2 quality % is made by containing.
(14) (13) described soldering heat-exchange tube as described above, in described Al-Cu-Mn series alloy, the content of Cu is 0.25-0.5 quality %, the content of Mn is 0.15-0.4 quality %.
(15) (13) described soldering heat-exchange tube as described above, in described Al-Cu-Mn series alloy, the content of Cu is 0.25-0.5 quality %, the content of Mn is 0.6-1.5 quality %.
Heat exchanger according to the present invention by under list (16) and limit to (22):
(16) a kind of heat exchanger comprises:
The soldering heat-exchange tube that limits by aforementioned (10); And
Fin,
Wherein, this heat-exchange tube is in the same place by the brazing layer soldering of this heat-exchange tube with this fin.
(17) (16) described heat exchanger as described above, the heat-exchange tube base material of wherein said soldering heat-exchange tube is a JIS A1000 series alloy.
(18) (16) described heat exchanger as described above, the heat-exchange tube base material of wherein said soldering heat-exchange tube is a JIS A3003 series alloy.
(19) (16) described heat exchanger as described above, the heat-exchange tube base material of wherein said soldering heat-exchange tube surpasses 0.2 quality % but is no more than the Cu of 0.6 quality % and the Al-Cu-Mn series alloy of the Mn of 0.15-2 quality % is made by containing.
(20) (19) described heat exchanger as described above, in described Al-Cu-Mn series alloy, the content of Cu is 0.25-0.5 quality %, the content of Mn is 0.15-0.4 quality %.
(21) (19) described heat exchanger as described above, in described Al-Cu-Mn series alloy, the content of Cu is 0.25-0.5 quality %, the content of Mn is 0.6-1.5 quality %.
(22) (16) arrive each described heat exchanger in (21) as described above, and wherein said fin is made by JIS A3000 series alloy.
Heat exchanger and manufacturing method thereof according to the present invention by under list (23) and limit to (25):
(23) a kind of heat exchanger and manufacturing method thereof may further comprise the steps:
By preparing the soldering heat-exchange tube to form brazing layer on the surface that will be ejected into aluminum or aluminum alloy heat-exchange tube base material by the aluminium alloy brazing material that each limited in aforementioned (1) to (5); And
With compound mode soldering heat-exchange tube and fin are heated with the brazing layer that utilizes the soldering heat-exchange tube this soldering heat-exchange tube and this fin brazed are in the same place.
(24) (23) described heat exchanger and manufacturing method thereof as described above, the step of wherein said preparation soldering heat-exchange tube is carried out like this: promptly form the heat-exchange tube base material by extruding, aluminium alloy brazing material is ejected on this heat-exchange tube base material subsequently.
(25) (23) or (24) described heat exchanger and manufacturing method thereof as described above, wherein said soldering step is carried out under normal pressure.
According to aforementioned (1) described the present invention, Cu and Mn raise reducing the potential difference between angle welding and the fastener current potential of angle welding, thereby prevent the angle welding excessive corrosion, and utilize the sacrificial etched layer of the Zn that is formed in this fastener to reduce corrosion depth.The predetermined thickness of the necessary fastener of spot corrosion can be reduced not take place like this, thereby the resistance to corrosion of aluminium alloy brazing material can be in the weight that alleviates the soldering goods, improved.
According to aforementioned (2) described the present invention, can obtain the good especially aluminium alloy brazing material of a kind of brazing property.
According to aforementioned (3) described the present invention, can obtain a kind of good especially aluminium alloy brazing material of resistance to corrosion that can form suitable Zn diffusion layer
According to aforementioned (4) described the present invention, can obtain a kind of good especially aluminium alloy brazing material of resistance to corrosion that can suppress excessive corrosion.
According to aforementioned (5) described the present invention, can obtain a kind of good especially aluminium alloy brazing material of resistance to corrosion that can suppress excessive corrosion.
According to aforementioned (6) described the present invention, Cu and Mn raise to reduce the potential difference between angle welding and the fastener current potential of angle welding, thereby prevent the angle welding excessive corrosion, and utilize the sacrificial etched layer of the Zn that is formed in this fastener to reduce corrosion depth, obtain the extraordinary aluminium alloy brazing spare of a kind of resistance to corrosion thus.
According to aforementioned (7) described the present invention, described brazing member and another fastener can suitably be bonded together, thereby obtain the extraordinary soldering goods of a kind of resistance to corrosion.
According to aforementioned (8) described the present invention, described brazing member and another fastener can suitably be bonded together, thereby obtain the extraordinary soldering goods of a kind of resistance to corrosion.
According to aforementioned (9) described the present invention, can suitably form the sacrificial etched layer of Zn at the surface portion of described base material.
According to aforementioned (10) described the present invention, Cu and Mn raise to reduce the potential difference between angle welding and the fastener current potential of angle welding, thereby prevent the angle welding excessive corrosion, and utilize the sacrificial etched layer of the Zn that is formed in this fastener to reduce corrosion depth.This can reduce the thickness of heat-exchange tube, thereby obtains a kind of in light weight and extraordinary soldering heat-exchange tube of resistance to corrosion.
According to aforementioned (11) described the present invention, can obtain the good especially soldering heat-exchange tube of a kind of resistance to corrosion.
According to aforementioned (12) described the present invention, can obtain the good especially soldering heat-exchange tube of a kind of resistance to corrosion.
According to aforementioned (13) described the present invention, can obtain the good especially soldering heat-exchange tube of a kind of resistance to corrosion.
According to aforementioned (14) described the present invention, can obtain a kind of resistance to corrosion and can extrude the good especially soldering heat-exchange tube of processability.
According to aforementioned (15) described the present invention, can obtain the good especially soldering heat-exchange tube of a kind of resistance to corrosion and elevated temperature strength.
According to aforementioned (16) described the present invention, can obtain the extraordinary heat exchanger of a kind of resistance to corrosion, soldering heat-exchange tube and fin preferably are bonded together in this heat exchanger.
According to aforementioned (17) described the present invention, can obtain the good especially heat exchanger of a kind of resistance to corrosion.
According to aforementioned (18) described the present invention, can obtain the good especially heat exchanger of a kind of resistance to corrosion.
According to aforementioned (19) described the present invention, can obtain the good especially heat exchanger of a kind of resistance to corrosion.
According to aforementioned (20) described the present invention, can obtain the good especially heat exchanger of a kind of resistance to corrosion.In addition, can improve and exchange the manufacturing efficient and the form accuracy thereof of pipe, thereby obtain extraordinary manufacturing efficient and form accuracy.
According to aforementioned (21) described the present invention, can obtain the extraordinary heat exchanger of a kind of resistance to corrosion and elevated temperature strength.
According to aforementioned (22) described the present invention, can make the extraordinary heat exchanger of a kind of resistance to corrosion, soldering heat-exchange tube and fin preferably are bonded together in this heat exchanger.
According to aforementioned (23) described the present invention, can obtain the extraordinary heat exchanger of a kind of resistance to corrosion, soldering heat-exchange tube and fin preferably are bonded together in this heat exchanger.
According to aforementioned (24) described the present invention, in the step of described preparation soldering heat-exchange tube, the extraordinary soldering heat-exchange tube of adhesion property between heat-exchange tube base material and brazing layer can be made effectively, the extraordinary heat exchanger of resistance to corrosion can be made then.
According to aforementioned (25) described the present invention, can in the surface portion of described heat-exchange tube, form the sacrificial etched layer of Zn by optimal way.
Description of drawings
Fig. 1 illustrates the front view of heat exchanger according to an embodiment of the invention;
Fig. 2 is the perspective view of local major part that the core of heat exchanger is shown;
Fig. 3 is the schematic cross sectional views that the connection status of the pipe of heat exchanger and fin is shown;
Fig. 4 is the curve map that corrosion potential in the heat exchanger is shown;
Fig. 5 is the schematic diagram that illustrates according to brazing member manufacture method of the present invention.
The specific embodiment
Aluminium alloy brazing material according to the present invention is used to make various brazing members or soldering goods, with the resistance to corrosion of final raising soldering goods.Therefore, hereinafter will illustrate according to aluminium alloy brazing material of the present invention and soldering goods.
Will with fin brazed together for use in aluminum or aluminum alloy heat exchanger condenser or the evaporimeter in automobile, family expenses or the business air conditioner device for example, the heat-exchange tube that perhaps is used for radiator can be used as the example of above-mentioned brazing member.In the following description, " heat-exchange tube of brazing member or soldering ", " base material or heat-exchange tube base material " and " soldering goods or heat exchanger " will be abbreviated as " brazing member etc. ", " base material etc. ", " soldering goods etc. " respectively.Following explanation is primarily aimed at such situation: promptly brazing member is the heat-exchange tube of soldering, and the soldering goods are heat exchangers.Yet should be appreciated that brazing member and soldering goods are not limited to this in the present invention.
According in the brazing member of the present invention etc., will aluminium alloy brazing material according to the present invention be ejected on the surface of base material etc., engage required brazing material layer thereby make this base material etc. have one.Utilize this brazing member etc. can make soldering goods etc.
Be that example illustrates above-mentioned brazing member etc. with heat-exchange tube 3 with reference to the accompanying drawings as the component part of heat exchanger illustrated in figures 1 and 2.
In this heat exchanger, fin 4 is soldered on the relative outer surface level of heat-exchange tube 3.Be used as heat-exchange tube 3 with one according to soldering heat-exchange tube S of the present invention, in this soldering heat-exchange tube S, on the outer surface of heat-exchange tube base material 30, be formed with a brazing layer 11 that sprays.Fig. 3 illustrates wherein soldering heat-exchange tube S and fin 4 solderings together with the schematic cross sectional views of the engagement state that forms an angle welding 12.Reference number 13 indication Zn diffusion layers.
In above-mentioned aluminium alloy brazing material, Si reduces to be used as jointing metal the fusing point of this alloy.If Si content then can damage brazing property less than 6 quality % or greater than 15 quality %.Therefore, Si content should be in the scope of 6-15 quality %.The content of preferred Si is 6-12.5 quality %.
In the surface layer part of the heat-exchange tube base material 30 of heat-exchange tube 3, to form Zn diffusion layer 13, this can improve the resistance to corrosion of heat-exchange tube 3 to Zn after soldering by the soldering thermal diffusion.If the content of Zn is less than 1 quality %, then the absolute magnitude of Zn is not enough, thereby causes anticorrosive effect not enough.And if the content of Zn surpasses 20 quality %, then can damage resistance to corrosion by the angle welding 12 of soldering thermosetting, thereby cause with to be attached to another fastener for example the fin 4 of heat-exchange tube 3 separate.Therefore, the content of Zn should be in the scope of 1-20 quality %.The content of preferred Zn is 2-7 quality %.
Cu and Mn are the elements that the corrosion potential of brazing material is uprised.As shown in Figure 4, in the conventional heat exchanger that uses the brazing material do not contain these elements because the corrosion potential E2 of angle welding is lower than the corrosion potential of fin, thus angle welding be corroded easily, thereby be easy to make fin to separate.On the contrary, in the present invention, by adding Cu and Mn the corrosion potential E1 of angle welding 12 is changed to higher corrosion potential, so that the corrosion potential of angle welding 12 is near the corrosion potential of fin 4, thereby the excessive corrosion that suppresses angle welding 12 prevents that then fin 4 from separating.This also has the effect that reduces corrosion depth by sacrificial etched.Realize above-mentioned effect, it is just enough only to add Cu or Mn, but can add Cu and Mn simultaneously.If the content of Cu is less than 0.3 quality %, then above-mentioned effect is insufficient.On the contrary, if the content of Cu surpasses 0.6 quality %, then intercrystalline corrosion can take place, this will damage resistance to corrosion.Therefore, the content of Cu should be in the scope of 0.3-0.6 quality %.The content of preferred Cu is 0.4-0.55 quality %.In addition, if the content of Mn less than 0.3 quality %, then above-mentioned effect is insufficient.On the contrary, if the content of Mn surpasses 1.5 quality %, then can generate huge intermetallic compound, this will damage resistance to corrosion.Therefore, the content of Mn should be in the scope of 0.3-1.5 quality %.The content of preferred Mn is 0.4-1 quality %.
Al is included in the brazing material with as matrix.Brazing material can comprise the impurity that any its content can not damage brazing property.For example, this impurity comprises Fe, In, Sn, Ni, Ti and Cr.
Can take any configuration according to aluminium alloy brazing material of the present invention, for example can manufacture ingot bar, extrude part, drawing part, rolled plate, paper tinsel shape spare or powder.
The aluminum or aluminum alloy material that constitutes heat-exchange tube base material 30 is not limited to specific a kind of, but can be any aluminum or aluminum alloy.Preferably, can use JIS (Japanese Industrial Standards) A1000 series alloy, JIS A3003 alloy (Cu content is 0.05-0.2 quality %, and Mn content is 1-1.5 quality %) as this aluminum or aluminum alloy.Preferably, also can use the Al-Cu-Mn series alloy that comprises more Cu and Mn than JIS A3003 alloy.Recommend to use a kind of pipe of making by above-mentioned alloy.
In the JIS A1000 series alloy among above-mentioned three kinds of alloys, the JISA1100 alloy is used in special recommendation, and this alloy has been widely used as tube material.
Be the reason of recommending JIS A3003 or Al-Cu-Mn series alloy below.Use comprises the heat-exchange tube base material 30 of Cu and Mn, and then Cu and Mn will be diffused in the angle welding 12 so that corrosion potential uprises, thereby improves the resistance to corrosion of angle welding 12.Even the content of the content of Cu and Mn surpasses content in the JIS A3003 alloy, also can realize or improve this effect.Therefore, in soldering heat-exchange tube S according to the present invention, recommend JIS A3003 and the material of the Al-Cu-Mn series alloy that comprises more Cu and Mn as heat-exchange tube base material 30.
Above-mentioned Al-Cu-Mn series alloy comprises and surpasses 0.2 quality % but be no more than the Cu of 0.6 quality % and the Mn of 0.15-2 quality %.If the content of Cu surpasses 0.6 quality %, then be easy in pipe 3, intercrystalline corrosion take place.Therefore, the upper limit of Cu content should be 0.6 quality %.In addition,, then can generate big intermetallic compound if the content of Mn surpasses 2 quality %, thus the infringement formability.Therefore, the upper limit of Mn content should be 2 quality %.
In the composition of above-mentioned Al-Cu-Mn series alloy, preferred Cu content is 0.25-0.5 quality %, and the content of Mn is 0.15-0.4 quality %.If Cu content and Mn content drop in the above-mentioned respective range, the current potential of angle welding is uprised, and can improve and to extrude processability.Therefore, when by extruding when making pipe, can improve and make efficient and can obtain the extraordinary pipe of formed precision.
In the composition of above-mentioned Al-Cu-Mn series alloy, also the content of preferred Cu is 0.25-0.5 quality %, and the content of Mn is 0.6-1.5 quality %.If Cu content and Mn content drop in the above-mentioned respective range, the current potential of angle welding is uprised, and can obtain extraordinary elevated temperature strength.This can improve the durability of heat-exchange tube, improves the durability of heat exchanger then.
The residual components of Al-Cu-Mn series alloy is Al and impurity.But only otherwise suppress above-mentioned effect, this residual components also can comprise other element.
The aluminum or aluminum alloy that constitutes fin 4 is not limited to specific a kind of alloy, and can be various aluminum or aluminum alloy.Preferred fin 4 is made by JIS A3000 series alloy (Al-Mn series alloy).Being exemplified as of this alloy: the alloy of Al-Mn content 1.2 quality %, Zn content 1 quality %.
In soldering heat-exchange tube S, brazing layer 11 forms by hot spraying method.Brazing layer 11 needn't be formed on the whole outer surface of heat-exchange tube base material 30, and only need be formed on part to be brazed.Even without forming brazing layer on whole outer surface, thereby the brazing material of fusing also can flow around whole outer surface and forms uniform Zn diffusion layer.
Can use a kind of well-known device to carry out hot spraying method.Fig. 5 illustrates an example of this method: promptly the outlet side at the extruder 20 that is used to extrude the heat-exchange tube base material 30 with predetermined cross-section is provided with thermojet rifle 21, so that carry out the shaping of heat-exchange tube base material 30 continuously and form brazing layer 11 on heat-exchange tube base material 30.Can make soldering heat-exchange tube S effectively by this method.In addition, because after extruding heat-exchange tube base material 30, one promptly before heat-exchange tube base material 30 cooling, immediately it is carried out thermojet, so the adhesiveness of brazing layer 11 is very good.Aluminium alloy brazing material to be sprayed can be selected arbitrarily from the various materials that comprise the rod-shaped material that is applicable to thermal spray equipment and dusty material.
Next, will the manufacture method of the parallel flow heat exchangers shown in Fig. 1 and 2 be described, this heat exchanger is an example of soldering goods.
In Fig. 1, reference number " 1 " and " 2 " indication collector, " 3 " indication aluminum or aluminum alloy heat-exchange tube, " 4 " indication corrugated fin, the inlet of " 5 " indication heat exchange medium, the outlet of " 6 " indication heat exchange medium, " 8 " and " 9 " indication side plate, and " 10 " indication heat exchanger core portion.
As shown in Figure 2, prepare a plurality of soldering heat-exchange tube S, in this heat-exchange tube, on the outer surface of heat-exchange tube base material 30, be formed with brazing layer 11.Then, the corresponding pipe that is formed at certain intervals in collector 1 and 2 along the longitudinal direction of collector 1 and 2 being inserted in the opposite end of heat-exchange tube S inserts in the hole.Then, corrugated fin 4 is installed in the space between adjacent heat-exchange tube S and the S, has the heat exchanger assemblies of heat exchange core portion 10 with formation.
After this, if necessary, after being applied to this heat exchanger assemblies, solder flux heats this heat exchanger assemblies.This heating makes brazing layer 11 fusing, thereby forms angle welding 12 between heat-exchange tube base material 30 and corrugated fin 4, make then parts 30 with 4 very well soldering be in the same place.In the heat exchanger core portion 10 of manufacturing, because the corrosion potential of angle welding 12 is near the corrosion potential of fin 4, so can suppress the separation of the fin 4 that the preferential corrosion because of angle welding 12 causes.In addition, Zn is diffused in the surface layer part of heat-exchange tube base material 30 equably when soldering, thereby forms a Zn diffusion layer 13, and the resistance to corrosion that this has improved heat-exchange tube 3 has improved the resistance to corrosion of whole heat exchanger then.
Soldering can be carried out under normal condition.Be recommended in and carry out soldering under the normal pressure.But the vacuum brazing meeting makes the Zn evaporation that is included in the brazing layer 11.Therefore, the vacuum brazing meeting makes Zn diffusion layer deficiency, thereby causes resistance to corrosion relatively poor.
Example
Make the soldering heat-exchange tube that wherein on three kinds of heat-exchange tube base materials, forms the brazing material layer.These soldering heat-exchange tubes and fins set are dressed up a heat exchange core, be soldered to mutually then together to obtain soldering goods that are used to assess.Use the material of JIS A1100 alloy in the manufacturing example 1 below as the heat-exchange tube base material, use the material of JIS A3003 alloy in the manufacturing example 2 below, and use the material of multiple Al-Cu-Mn series alloy in the manufacturing example 3 below as the heat-exchange tube base material as the heat-exchange tube base material.
(making example 1)
Be numbered 1 to 28 soldering heat-exchange tube shown in the manufacturing table 1.
Use various aluminium alloy brazing materials shown in the table 1 and Zn as the bar shaped blasting materials, to be used to form the brazing material layer.The content that is contained in the Zn in the aluminium alloy brazing material will reduce because of spraying brazing material.Therefore, in the row of the brazing material composition of layer in table 1, the composition of each bar shaped blasting materials is not shown but the composition of each brazing material that forms by injection is shown, promptly respectively be ready to use in the composition of the aluminium alloy brazing layer of soldering.The residual components of each aluminium alloy brazing material is aluminium and impurity.
The thermojet rifle 21 and 21 of arc spraying equipment that uses extruder 20 and be arranged on the outlet side of extruder 20 is made each soldering heat-exchange tube.At first, in extruder 20, extrude pancake antipriming pipe 30 (see figure 2)s that high 3mm, wide 16mm and wall thickness are 0.5mm.Then, after extruding, from thermojet rifle 21 and 21 the bar shaped blasting materials is ejected on the flat outer surface of antipriming pipe 30 immediately, on the whole outer surface of antipriming pipe 30, to form brazing material layer 11, then with this antipriming pipe with water cooling and coiling 22.Like this, can produce long and continuous soldering heat-exchange tube S by above-mentioned steps.The emitted dose that is numbered each soldering heat-exchange tube of 1 to 27 is 50g/m
2The emitted dose that is numbered 28 Zn playpipe is 10g/m
2
Then, this length and continuous soldering heat-exchange tube S are cut into length respectively for the section of 250mm,, carry out following soldering test then to make the soldering heat-exchange tube S shown in many Fig. 2.
(soldering test)
Make the multi-flow heat exchanger core with soldering heat-exchange tube S with by the fin 4 that the alloy of Al-Mn content 1.2 quality %, Zn content 1 quality % is made.Then, this heat exchanger core is immersed the series of fluoride wherein solder flux be suspended in the solder flux liquid in the water, dry then.After this, under normal pressure at N
2Heated 10 minutes with 600 ℃ in the gas shield gas.
Utilize following reference symbol that the brazing property of the soldering goods that obtained is assessed.
(brazing property)
◎: do not have corrosion, fin-heat-exchange tube joint rate is not less than 95%
Zero: mild corrosion, fin-heat-exchange tube joint rate is not less than 95%
△: mild corrosion, fin-heat-exchange tube joint rate are not less than 80% but less than 95%
*: the severe corrosion, fin-heat-exchange tube joint rate is less than 80%
These results are also shown in the table 1.
In addition, under the following conditions each soldering goods is carried out CCT corrosion test (test of combination cyclic corrosion) and SWATT corrosion test.Then, assess resistance to corrosion according to the corrosion depth (μ m) of the fin released state of utilizing following symbol and heat-exchange tube.The soldering situation that is numbered 26 and 27 test specimen is relatively poor, therefore they is not carried out corrosion test.
(CCT corrosion test)
The NaCl aqueous solution of use 5% is as corrosion test liquid.
1 hour → dry 2 hours → this circulation in 21 hours of getting wet of jet etching test(ing) liquid is repeated 180 times.
(SWATT corrosion test)
Use according to the artificial sea water of ASTM (American Society for Tests and Materials) standard and the mixed liquor of acetate (the pH value is 2.8 to 3) as corrosive liquid.
0.5 hour → dry this circulation in 1.5 hours of jet etching test(ing) liquid is repeated 960 hours.
(fin released state)
◎: after the SWATT test, the fin conservation rate is 90% or bigger
Zero: after SWATT test, the fin conservation rate is 60% or bigger but less than 90%
△: after SWATT test, the fin conservation rate is 30% or bigger but less than 60%
*: after the SWATT test, the fin conservation rate is less than 30%
(corrosion depth)
After CCT corrosion test and SWATT corrosion test, measure the corrosion depth (μ m) of the opposite planar of heat-exchange tube.In each corrosion test, use the long heat-exchange tube of 9 sections 250mm, and the corrosion depth of maximum is used as the corrosion depth of each test.
These results are also shown in the table 1.
Table 1
| Numbering | Brazing layer composition (quality %) all the other: Al and impurity | Brazing property | The CCT corrosion test | The SWAAT corrosion test | ||||||
| Si | Zn | Cu | Mn | The fin released state | Corrosion depth (μ m) | The fin released state | Corrosion depth (μ m) | |||
| Example | 1 | 6 | 4 | 0.5 | - | ◎ | ◎ | 104 | ◎ | 88 |
| 2 | 6 | 6 | 0.5 | - | ◎ | ◎ | 108 | ◎ | 97 | |
| 3 | 7.5 | 3 | 0.5 | - | ◎ | ◎ | 100 | ◎ | 80 | |
| 4 | 7.5 | 15 | 0.5 | - | ◎ | ◎ | 109 | ○ | 98 | |
| 5 | 10 | 3 | 0.5 | - | ◎ | ◎ | 101 | ◎ | 82 | |
| 6 | 10 | 6 | 0.6 | - | ◎ | ◎ | 107 | ◎ | 94 | |
| 7 | 12 | 3 | 0.5 | - | ◎ | ◎ | 102 | ◎ | 85 | |
| 8 | 12 | 6 | 0.4 | - | ◎ | ◎ | 108 | ◎ | 96 | |
| 9 | 6 | 4 | - | 0.5 | ◎ | ◎ | 105 | ◎ | 90 | |
| 10 | 6 | 6 | - | 0.5 | ◎ | ◎ | 107 | ◎ | 94 | |
| 11 | 7.5 | 3 | - | 0.5 | ◎ | ◎ | 100 | ◎ | 81 | |
| 12 | 7.5 | 15 | - | 0.8 | ◎ | ◎ | 109 | ○ | 98 | |
| 13 | 10 | 3 | - | 0.4 | ◎ | ◎ | 102 | ◎ | 84 | |
| 14 | 10 | 6 | - | 1.2 | ◎ | ◎ | 106 | ◎ | 92 | |
| 15 | 12 | 3 | - | 0.5 | ◎ | ◎ | 101 | ◎ | 82 | |
| 16 | 12 | 6 | - | 0.9 | ◎ | ◎ | 104 | ◎ | 88 | |
| 17 | 7.5 | 3 | 0.5 | 0.5 | ◎ | ◎ | 100 | ◎ | 80 | |
| 18 | 10 | 6 | 0.4 | 0.9 | ◎ | ◎ | 105 | ◎ | 90 | |
| Comparative example | 19 | 7.5 | 3 | - | - | ◎ | ◎ | 135 | ○ | 123 |
| 20 | 7.5 | 3 | 0.8 | - | ◎ | ◎ | 170 | ○ | 160 | |
| 21 | 7.5 | 3 | - | 1.7 | ◎ | ◎ | 136 | ○ | 124 | |
| 22 | 7.5 | 3 | 0.1 | - | ◎ | ◎ | 132 | ○ | 120 | |
| 23 | 7.5 | 3 | - | 0.1 | ◎ | ◎ | 134 | ○ | 121 | |
| 24 | 7.5 | 60 | - | - | ◎ | ○ | 140 | × | 138 | |
| 25 | 7.5 | 0.5 | - | - | ◎ | ○ | 160 | ○ | 150 | |
| 26 | 20 | 4 | - | - | × | - | - | - | - | |
| 27 | 4 | 4 | - | - | × | - | - | - | - | |
| 28 | Zn playpipe (10g/m 2) | ◎ | ○ | 148 | △ | 102 | ||||
Result shown in the table 1 shows: the resistance to corrosion of the soldering goods of each example of the predetermined aluminium alloy of use is all very good.
(making example 2)
Use has the material of the JIS A3003 alloy of the composition shown in the table 2 as the heat-exchange tube base material.Use the method identical to form flat porous extruding pipe 30, after extruding, immediately the bar shaped blasting materials is ejected into then on the relative plane of this antipriming pipe, with formation brazing material layer 11 with making example 1.After this, with this antipriming pipe with water cooling coiling 22 then.Like this, can produce long and continuous soldering heat-exchange tube S by above-mentioned steps.Every kind of composition of the brazing material layer 11 that forms by this injection method illustrates to 38 with numbering 31 respectively.Emitted dose in each soldering heat-exchange tube is 50g/m
2
Table 2
| A3003 composition (quality %), all the other: Al and impurity | |||||||
| Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti |
| 0.1 | 0.37 | 0.1 | 1 | - | - | - | 0.01 |
Next, in the mode identical with making example 1, the soldering heat-exchange tube S that 250mm is long manufactures heat exchanger core with fin 4 and soldering is in the same place under same condition.
Utilize identical reference symbol to assess the brazing property of each the soldering goods that is obtained.
In addition, in the mode identical each soldering goods is carried out CCT corrosion test (test of combination cyclic corrosion) and SWAAT corrosion test with making example 1.Then, fin released state and pipe corrosion depth (μ m) are assessed.
These results are shown in the table 3.
Table 3
| Numbering | Brazing layer composition (quality %) all the other: Al and impurity | Brazing property | The CCT corrosion test | The SWAAT corrosion test | ||||||
| Si | Zn | Cu | Mn | The fin released state | Corrosion depth (μ m) | The fin released state | Corrosion depth (μ m) | |||
| Example | 31 | 7.5 | 10 | - | 1 | ◎ | ◎ | 102 | ◎ | 90 |
| 32 | 10 | 6 | 0.35 | - | ◎ | ◎ | 97 | ◎ | 87 | |
| 33 | 10 | 0.35 | - | ◎ | ◎ | 101 | ◎ | 88 | ||
| 34 | 5 | - | ◎ | ◎ | 100 | ◎ | 87 | |||
| 35 | 15 | 0.35 | - | ◎ | ◎ | 102 | ◎ | 89 | ||
| 36 | 0.5 | - | ◎ | ◎ | 100 | ◎ | 87 | |||
| 37 | 12 | 10 | 0.4 | - | ◎ | ◎ | 99 | ◎ | 86 | |
| 38 | 15 | 0.4 | - | ◎ | ◎ | 101 | ◎ | 90 | ||
Result shown in the table 3 shows: the resistance to corrosion of the soldering goods of each example is all very good.
(making example 3)
What use had a composition shown in the table 4 is numbered 41 to 49 the Al-Cu-Mn alloy material as heat-exchange tube.Form flat porous extruding pipe 30 by the method identical, extruding after, immediately the bar shaped blasting materials is ejected into then on the relative plane of this antipriming pipe, with formation brazing material layer 11 with making example 1.After this, with this antipriming pipe with water cooling and coiling 22.Like this, produce long and continuous soldering heat-exchange tube S by above-mentioned steps.In each example, use identical bar shaped blasting materials, the composition of the brazing material layer 11 that forms by injection method is: the Zn of the Si of 10 quality %, 5 quality %, the Cu of 0.4 quality %, all the other are Al and impurity.Emitted dose in each soldering heat-exchange tube is 50g/m
2
Next, in the mode identical with making example 1, the soldering heat-exchange tube S that 250mm is long manufactures heat exchanger core with fin 4 and soldering is in the same place under same condition.
Utilize identical reference symbol to assess the brazing property of each the soldering goods that is obtained.
In addition, in the mode identical each soldering goods is carried out CCT corrosion test (test of combination cyclic corrosion) and SWAAT corrosion test with making example 1.Then, fin released state and pipe corrosion depth (μ m) are assessed.
These results are shown in the table 4.
Table 4
| Numbering | The composition of pipe (quality %) all the other: Al and impurity | Brazing property | The CCT corrosion test | The SWAAT corrosion test | ||||
| Cu | Mn | The fin released state | Corrosion depth (μ m) | The fin released state | Corrosion depth (μ m) | |||
| Example | 41 | 0.21 | 0.15 | ◎ | ◎ | 105 | ◎ | 87 |
| 42 | 2 | ◎ | ◎ | 104 | ◎ | 85 | ||
| 43 | 0.25 | 0.2 | ◎ | ◎ | 105 | ◎ | 85 | |
| 44 | 1 | ◎ | ◎ | 104 | ◎ | 84 | ||
| 45 | 0.3 | 1.5 | ◎ | ◎ | 103 | ◎ | 83 | |
| 46 | 0.4 | 0.2 | ◎ | ◎ | 103 | ◎ | 82 | |
| 47 | 1 | ◎ | ◎ | 102 | ◎ | 80 | ||
| 48 | 0.6 | 0.15 | ◎ | ◎ | 100 | ◎ | 80 | |
| 49 | 2 | ◎ | ◎ | 98 | ◎ | 79 | ||
The brazing material layer: the Zn of the Si of 10 quality %, 5 quality %, the Cu of 0.4 quality %, all the other are Al and impurity
Result shown in the table 4 shows: the resistance to corrosion of the soldering goods of each example is all very good.
Term used herein and wording are used to describe rather than limit, and do not get rid of feature or part scheme of equal value any and illustrated and that illustrate when using these terms and wording, can carry out various modifications in the scope of claim of the present invention.
Industrial applicibility
Aluminium alloy brazing material according to the present invention can be by the sacrificial etched corrosion depth that limits when being used as the corrosion-resistant material of soldering, therefore, for example can use according to aluminium alloy brazing material of the present invention during heat exchanger when making the aluminium soldering goods to have resistance to corrosion.
Claims (25)
1. aluminium alloy brazing material mainly comprises:
Si:6-15 quality %;
Zn:1-20 quality %;
0.3-0.6 at least a among the Mn of the Cu of quality % and 0.3-1.5 quality %; And
All the other are Al and impurity.
2. aluminium alloy brazing material according to claim 1 is characterized in that, the content of Si is 6-12.5 quality %.
3. aluminium alloy brazing material according to claim 1 and 2 is characterized in that, the content of Zn is 2-7 quality %.
4. according to each described aluminium alloy brazing material in the claim 1 to 3, it is characterized in that the content of Cu is 0.4-0.55 quality %.
5. according to each described aluminium alloy brazing material in the claim 1 to 4, it is characterized in that the content of Mn is 0.4-1 quality %.
6. a brazing member comprises that an aluminum or aluminum alloy base material and is formed on the brazing layer of this substrate surface, and wherein, this brazing layer is the jetted layers by the aluminium alloy brazing material that each limited in the claim 1 to 5.
7. soldering goods comprise:
The brazing member that limits by claim 6; And
One fastener,
Wherein, this brazing member is in the same place by the brazing layer soldering of this brazing member with this fastener.
8. soldering product and making method may further comprise the steps:
By preparing brazing member to form brazing layer on the surface that will be ejected into the aluminum or aluminum alloy base material by the aluminium alloy brazing material that each limited in the claim 1 to 5; And
With compound mode brazing member and another fastener are heated by described brazing layer this brazing member and this fastener soldering are in the same place.
9. soldering product and making method according to claim 8 is characterized in that, described soldering step is carried out under normal pressure.
10. soldering heat-exchange tube comprises:
One aluminum or aluminum alloy heat-exchange tube base material; And
One is formed on the brazing layer on the surface of this heat-exchange tube base material,
Wherein, this brazing layer is the jetted layers by the aluminium alloy brazing material that each limited in the claim 1 to 5.
11. soldering heat-exchange tube according to claim 10 is characterized in that, described heat-exchange tube base material is made by JIS A1000 series alloy.
12. soldering heat-exchange tube according to claim 10 is characterized in that, described heat-exchange tube base material is made by JIS A3003 series alloy.
13. soldering heat-exchange tube according to claim 10 is characterized in that, described heat-exchange tube base material is made by the Al-Cu-Mn series alloy of the Mn that contains the Cu that surpasses 0.2 quality % but be no more than 0.6 quality % and 0.15-2 quality %.
14. soldering heat-exchange tube according to claim 13 is characterized in that, in described Al-Cu-Mn series alloy, the content of Cu is 0.25-0.5 quality %, and the content of Mn is 0.15-0.4 quality %.
15. soldering heat-exchange tube according to claim 13 is characterized in that, in described Al-Cu-Mn series alloy, the content of Cu is 0.25-0.5 quality %, and the content of Mn is 0.6-1.5 quality %.
16. a heat exchanger comprises:
The soldering heat-exchange tube that limits by claim 10; And
Fin,
Wherein, this heat-exchange tube is in the same place by the brazing layer soldering of this heat-exchange tube with this fin.
17. heat exchanger according to claim 16 is characterized in that, the heat-exchange tube base material of described soldering heat-exchange tube is a JIS A1000 series alloy.
18. heat exchanger according to claim 16 is characterized in that, the heat-exchange tube base material of described soldering heat-exchange tube is a JIS A3003 series alloy.
19. heat exchanger according to claim 16 is characterized in that, the heat-exchange tube base material of described soldering heat-exchange tube is made by the Al-Cu-Mn series alloy of the Mn that contains the Cu that surpasses 0.2 quality % but be no more than 0.6 quality % and 0.15-2 quality %.
20. heat exchanger according to claim 19 is characterized in that, in described Al-Cu-Mn series alloy, the content of Cu is 0.25-0.5 quality %, the content 0.15-0.4 quality % of Mn.
21. heat exchanger according to claim 19 is characterized in that, in described Al-Cu-Mn series alloy, the content of Cu is 0.25-0.5 quality %, and the content of Mn is 0.6-1.5 quality %.
22., it is characterized in that described fin is made by JIS A3000 series alloy according to each described heat exchanger in the claim 16 to 21.
23. a heat exchanger and manufacturing method thereof may further comprise the steps:
By preparing the soldering heat-exchange tube to form brazing layer on the surface that will be ejected into aluminum or aluminum alloy heat-exchange tube base material by the aluminium alloy brazing material that each limited in the claim 1 to 5; And
With compound mode soldering heat-exchange tube and fin are heated with the brazing layer by the soldering heat-exchange tube this soldering heat-exchange tube and this fin brazed are in the same place.
24. heat exchanger and manufacturing method thereof according to claim 23 is characterized in that, the step of described preparation soldering heat-exchange tube is carried out like this: promptly form the heat-exchange tube base material by extruding, aluminium alloy brazing material is ejected on this heat-exchange tube base material subsequently.
25., it is characterized in that described soldering step is carried out according to claim 23 or 24 described heat exchanger and manufacturing method thereofs under normal pressure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002361130 | 2002-12-12 | ||
| JP361130/2002 | 2002-12-12 | ||
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| CN1726114A true CN1726114A (en) | 2006-01-25 |
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| CN 200380105977 Pending CN1726114A (en) | 2002-12-12 | 2003-12-12 | Aluminum alloy brazing material, brazing member, brazed article and brazinh method therefor using said material, brazing heat exchanging tube, heat exchanger and manufacturing method thereof using sai |
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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 |
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