CN104246417B - Heat exchange tube attached with aluminum alloy inner groove - Google Patents
Heat exchange tube attached with aluminum alloy inner groove Download PDFInfo
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- CN104246417B CN104246417B CN201380019372.2A CN201380019372A CN104246417B CN 104246417 B CN104246417 B CN 104246417B CN 201380019372 A CN201380019372 A CN 201380019372A CN 104246417 B CN104246417 B CN 104246417B
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- Prior art keywords
- heat pipe
- inner face
- aluminium alloy
- fluted
- pipe
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
- B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
- F28F1/325—Fins with openings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/10—Fastening; Joining by force joining
Abstract
Disclosed is a heat exchange tube that has excellent hairpin bending workability, generates little fin crushing, and has excellent corrosion resistance. Provided is the heat exchange tube attached with an aluminum alloy inner groove that has a plurality of ridge-type fins formed therein, contains 0.8 to 1.8 percentage by mass of Mn (hereinafter, percentage by mass is referred to as %), 0.3% to 0.8% of Cu, and 0.02% to 0.2% of Si. The remnant is formed from Al and unavoidable impurities, and the average grain size of the molded article is 150mum or less.
Description
Technical field
The present invention relates to：In domestic air conditioning, business air-conditioning, in heat-pump type hot-water boiler etc., as intersection wing
The heat pipe of piece (Cross fin) type heat exchanger is come the inner face band fluted aluminium alloy heat pipe to use.
Background technology
General cross-fin type (another name ＂ fin-and-tube type (Fin-and-tube type) ＂) heat exchanger (Fig. 1), in aluminum
The patchhole of fin split shed is inserted into heat pipe, then, inside the heat pipe press-in have more than its internal diameter external diameter it
Expander with mandrel (mandrel), the expanded in diameter of heat pipe makes the patchhole of heat pipe outer peripheral face and aluminium radiator fin closely sealed
(expander is processed, Fig. 2).Afterwards, hair clip (Hairpin) shape will be bent to aluminium radiator fin shape all-in-one-piece heat pipe, then will be another
Outside sweep becomes the heat pipe (U-shaped pipe) of U-shaped to couple together with gas brazing, obtains completing product (non-patent literature 1).
For the heat pipe for cross-fin type heat exchanger, because making cold-producing medium HFC etc. flow in pipe, carry out
Heat exchange, having cross sectional shape in the inner face of pipe is trapezoidal or heat pipe (hereinafter referred to as " the inner face of the ridged fin such as triangle
Carry fluted heat pipe ") used, therefore the high efficiency of heat exchanger and energy-saving are developed.In someone discloses
The fluted heat pipe of face band, has variously-shaped fin, and for these shapes it is stipulated that：As shown in Figure 4 is prominent
Play the depth of the ditch between type fin, the thickness (wall thickness of protrusion-type fin basilar parts) of bottom, the shape (drift angle of fin
Deng), or protrusion-type fin as shown in Figure 5 lead angle (Lead angle, that is, with respect to pipe range direction, fin array
Angle).(for example, patent documentation 1).The reason heat conductivility of the fluted heat pipe of inner face band is outstanding is：Pipe inner face
Surface area ratio do not have the big of gelled smooth pipe, and homogeneous cold-producing medium liquid film is found out (non-specially in pipe by this ditch
Sharp document 2).
In the inner face of inner face band fluted heat pipe pipe, typically, by rotary rolling mill pipe (i.e. crude pipe
Son, referred to smooth pipe), form the fin that continuous arrangement is spiral helicine protrusion-type.For rotary rolling mill method, it is people
Known is：It is inserted into the plug of with groove rotating freely in pipe, be squeezed in the outer roller rotating freely of pipe so as to planetary rotation
While turning, rolling (roll rolling) autofrettage (as shown in Figure 3) of pull-out pipe, or without rolling, and extrusion ball
(ball) ball roll forming manufacturing process (non-patent literature 1, patent documentation 2).
On the fluted heat pipe of inner face band, it is currently mainly used the copper products such as copper or copper alloy, but to reaching fall
Low fee of material and light-weighted requirement, someone considers using aluminums (hereinafter referred to as aluminium alloy) such as aluminum or aluminum alloy.
But, compared with copper product, corrosion resisting property is poor for aluminium alloy, discloses in patent documentation 3 and 4：A kind of inner face carries
The heat pipe of groove, wherein, heat pipe is 2 layers of construction, uses Al-Mn alloy in pipe la m, coats on extexine
(clad) the sacrifice corrosion-resistant coating of Al-Zn alloy.
On the other hand, in addition to corrosion proof problem, expander processes the fluted aluminium alloy heat conduction of these inner face bands
Guan Shi, the head of the protrusion-type fin of pipe inner face is damaged, and that is, so-called " fin is damaged " occurs, or because expander is insufficient,
Insufficient with the bonding of aluminium radiator fin, and lead to the problem of heat conductivity that cannot expect.The reason these problems occur be：Aluminum
Or the strength of materials of inner face band fluted aluminium alloy heat pipe is less than copper.
In addition, problem also occurs being：For above-mentioned aluminum inner face band fluted heat pipe carry out hair fastener bending plus
In man-hour, bending section ruptures.
In addition, have studied in patent documentation 5：Add Zn alloy as skin material in JIS3003, added with improving expander
Work.
【Background technology document】
【Patent documentation】
【Patent documentation 1】Japanese Patent Laid-Open 2003-287383 publication
【Patent documentation 2】The special flat 4-262818 publication of Japan Patent
【Patent documentation 3】Japanese Patent Laid-Open 2000-121270 publication
【Patent documentation 4】Japanese Patent Laid-Open 2009-250562 publication
【Patent documentation 5】Japanese Patent Laid-Open 2008-267714 publication
【Non-patent literature】
【Non-patent literature 1】Her rattan is just clear: heat conduction, and 42,174 (2003), 3
【Non-patent literature 2】Rock rugged clear male and other: R＆D Kobe Steel skill report 50,3 (2000), 66
Content of the invention
【Invention problem to be solved】
However, the prior art that above-mentioned document is recorded, in following some, also there is room for improvement.
In patent documentation 1, patent documentation 2 and non-patent literature 1,2, the problem of rupture during hair fastener bending machining and dissipate
The damaged problem of backing is not resolved.In patent documentation 3, describing purpose is to improve the corrosion resistance of aluminium alloy heat pipe,
But the problem of rupture during hair fastener bending machining and fin breakage is not resolved.Patent documentation 4 is characterised by：For
Raising corrosion resistance, in outer surface cladding ratio core current potential low skin material, but with regard to broken during hair fastener bending machining
The problem of the problem split and fin breakage is silent on.
And, in order to improve corrosion resistance, by Al-Zn alloy-coated when the heat pipe, because soft surface, manufacture rolling and add
During pipe before work, surface produces small scar.If carrying out rotary rolling mill using those pipes, this small scar is to increase
Crack (crack) for hundreds of microns.Cause a problem in that：These slight cracks are by rising of becoming during hair fastener bending machining that rupture produces
Point.
In addition, in patent documentation 5 method, splintering problem during hair fastener bending machining is not improved.In addition, because to
With the addition of Cu, Fe in skin material, the corrosion resistance of skin material is poor, may lead to：The sacrifice anticorrosion effect expected can not be obtained
Really.In addition, because employing core, and this core is made up of the alloy being equivalent to JIS3003, the damaged problem of fin does not have
It is resolved.
The present invention in view of the foregoing, its objective is：A kind of inner face outstanding in hair fastener bendability is provided to carry ditch
The aluminium alloy heat pipe of groove.It is also object of the invention to：A kind of outstanding fluted aluminum of inner face band of corrosion resistance is provided to close
Gold heat pipe processed.It is also object of the invention to：There is provided a kind of inner face band fluted aluminium alloy heat pipe, wherein it is difficult to
Produce the breakage of fin.
【For means to solve the problem】
The present inventor, has carried out the related various researchs of inner face band fluted aluminium alloy heat pipe, it is found that can
To provide a kind of material, the feature of this material is：The composition of core alloy contains specific species and content, so that hair fastener is curved
Bent processability is outstanding, and fin breakage is difficult to occur.
And, a kind of material is provided, is characterized in：The Zn distributions limit of corrosion-resistant coating will be sacrificed in particular range, thus
Make hair fastener bendability outstanding, and the damaged hardly possible of fin occurs, corrosion resistance is outstanding.
The 1st described in claim 1 invention is a kind of fluted aluminium alloy heat pipe of inner face band, its feature
It is：The heat pipe forming more than 2 (scope of " more than A " also comprises A itself) ridged fin on inner face is aluminium alloy
Heat pipe processed, consisting of contain Mn: 0.8～1.8 mass % (hereinafter only quality % being represented with %), Cu: 0.3～
0.8%, Si: 0.02～0.2%, remainder is inevitable impurity and Al；And, the average knot of above-mentioned heat conduction tube section
Crystal size is less than 150 μm.
Described in claim 2 the 2nd invention is a kind of fluted aluminium alloy heat pipe of inner face band, and its feature exists
In：On the surface of the heat pipe described in claim 1, surface Zn concentration is more than 0.5%, and average surface Zn concentration is 1
～12%, and the concentration of arbitrary surfaces is within ± the 50% of average surface Zn concentration, and there is Zn diffusion layer, wherein,
The Zn diffusion depth (hereinafter referred to as " Zn thickness of diffusion layer ") starting from surface is 100～300 μm.
Described in claim 3 the 3rd invention is a kind of fluted aluminium alloy heat pipe of inner face band, and its feature exists
In：Heat pipe described in claim 2 is aluminium alloy heat pipe, consisting of contain Mn: 0.8～1.8%, Cu: 0.3～
0.8%, Si: 0.02～0.2%, remainder is inevitable impurity and Al；And with aluminium alloy heat pipe as core,
Above-mentioned aluminium alloy heat pipe is characterised by, the section average crystallite particle diameter of above-mentioned heat pipe is less than 150 μm；Its outer surface
Upper cladding Al-Zn alloy is as skin material；And, carry out Zn diffusion heat treatments.
Described in claim 4 the 4th invention is a kind of fluted aluminium alloy heat pipe of inner face band, and its feature exists
In：In claim 3 in described heat pipe, the above-mentioned core after above-mentioned Zn diffusion heat treatments and above-mentioned skin material
Difference of hardness be below 15Hv.
Described in claim 5 the 5th invention is a kind of fluted aluminium alloy heat pipe of inner face band, and its feature exists
In：In heat pipe described in claim 3 or claim 4, above-mentioned skin material contains Zn: 1.0～7.0%, and
Mn: 0.3～1.5%, remainder is inevitable impurity and Al.
Described in claim 6 the 6th invention is a kind of fluted aluminium alloy heat pipe of inner face band, and its feature exists
In：Heat pipe is aluminium alloy heat pipe as stated in claim 2, consisting of contain Mn: 0.8～1.8%, Cu: 0.3～
0.8%, and Si: 0.02～0.2%, remainder is inevitable impurity and Al；And the spy of aluminium alloy heat pipe
Levy and be, the section average crystallite particle diameter of above-mentioned heat pipe is less than 150 μm；On the outer surface of above-mentioned aluminium alloy heat pipe
Spraying plating Zn, and carry out Zn diffusion heat treatments.
Described in claim 7 the 7th invention is a kind of fluted aluminium alloy heat pipe of inner face band, and its feature exists
In：In claim 6 in described heat pipe, with respect to the outer surface of the heat pipe being plated Zn, coverage rate be 90% with
On.
Described in claim 8 the 8th invention is that the inner face as described in claim 6 and claim 7 carries
The manufacture method of the aluminium alloy heat pipe of groove it is characterised in that：When above-mentioned heat pipe carries out spraying plating, above-mentioned heat pipe
The center of the geometry center in section and more than 2 (including 2) Zn spray torches connects, and adjacent line is with above-mentioned geometry respectively
It is centrally formed angle, this angle is less than 120 °.
【The effect of invention】
The inner face band fluted aluminium alloy heat pipe of the present invention, has the effect that：Can suppress to bend in hair fastener
The generation rupturing during processing.In addition also have the effect that：There is good corrosion resistance it is difficult to occur fin damaged.
Brief description
【Drawing simple illustration】
Fig. 1 is an example of the expanded view of a part for cross-fin type heat exchanger.
What Fig. 2 represented is an example of mandrel method of expanding.
What Fig. 3 represented is an example of rolling device.
Fig. 4 is the schematic diagram of, expression be the fluted heat pipe of inner face band section an example.
Fig. 5 is the schematic diagram of, expression be inner face ridged fin lead angle.
Specific embodiment
【The preferred forms of invention】
Below with regard to embodiments of the present invention, it is described in detail.
The heat pipe envisioned in the present embodiment is, for example, for leading on the heat exchanger for air conditioner of average family
Heat pipe, its size is, for example, external diameter φ 4.0～φ 9.54mm, the thickness 0.3～0.6mm of bottom about small-caliber thin-walled tube.
Therefore, in various aluminium alloys, there is suitable intensity and for manufacturing small-caliber thin-walled tube, there is preferable processability
(extrudability, draftability, rolling) alloy (for example, Al-Mn A3003 alloy (Al-1.0～1.5%Mn-0.05～
0.20%Cu alloy)) based on (base), by adjusting addition element, the granular of crystal grain and intensity are improved, thus
A kind of aluminium alloy can be obtained, the feature of this aluminium alloy is rupture when preventing hair fastener bending machining and the breakage of fin.
The composition of heat pipe
Next, the reasons why be defined for the composition of heat pipe in present embodiment, illustrate.
Mn is the main adding elements improving intensity in 3000 alloys, its solid solution in aluminum, and a part separates out, and has tax
Give the effect of intensity, when its addition is less than 0.8%, the intensity of heat pipe is not enough.On the other hand, when addition is more than 1.8%,
The quantitative change that the effect that intensity improves reaches full, thick intermetallic compound is many, is susceptible to rupture in the manufacturing process of pipe
The problems such as.Therefore, Mn addition is 0.8～1.8% scope.More preferred scope is 1.0～1.5%.
Cu solid solution in aluminum, has the effect improving intensity further, and does not hinder processability.And, Cu improves pitting
Current potential, the Pitting Potential difference of Zn diffusion layer and the pipe central part not spreading Zn is big, can improve sacrifice corrosion-resisting function.It adds
When dosage is fewer than 0.3%, intensity is not enough it is impossible to prevent the groove breakage causing due to mechanical expander, and, improves pitting electricity
The degree of position is not enough, sacrifices corrosion-resisting function low.More than 0.8%, extrudability, draftability, corrosion resistance is poor.Therefore, Cu addition
Scope for 0.3～0.8%.More preferred scope is 0.4～0.6%.
Si, in Al-Mn-Cu alloy, forms Al-Mn-Si or Al-Mn-Si-Cu intermetallic compound, has raising
The effect of intensity.On the other hand, these intermetallic compound hinders recrystallization in hot extrusion, and its addition is more than 0.2%
When, average crystallite particle diameter is more than 150 μm, becomes the reason rough surface during hair fastener bending machining, fracture.On the other hand,
Presence in aluminium alloy for the Si is inevitable, considers from practical standpoint, is limited to 0.02% and the following is difficulty.Therefore, Si
Addition is 0.02～0.2%.More preferred scope is 0.02～0.1%.
Fe, Mg, Zn etc. are impurity, and when it is that less than 0.2%, Zn is less than 0.3% that Fe is less than 0.6%, Mg, they are not
Hinder the effect of the present invention.
In addition, Ti, Cr, Zr, because having the effect that ingot bar is organized homogeneous granular, can contain, but exceed
If 0.2%, form huge intermetallic compound or extrudability decline, so its content is preferably less than 0.2%.If
In this scope, do not hinder the effect of heat pipe in present embodiment.In addition its content or 0～0.1%, can also be 0
～0.05%.
In addition, for the various composition amount in heat pipe in present embodiment or sacrifice corrosion-resistant coating, can be hereafter real
Apply a S1～S11, the valency described in K1～K8, can be in the range of these numerical value.
Sacrifice corrosion-resistant coating with regard to cladding
Next, with regard to the reason that is defined of Zn distribution to the sacrifice corrosion-resistant coating of cage walls in present embodiment
By illustrating.
In aluminium alloy cage walls in embodiment of the present invention, using Al-Zn alloy as skin material cladding, stretch process
Afterwards, by carrying out Zn diffusion heat treatments, form the layer of Zn diffusion.For above-mentioned Zn diffusion layer, with tubing in do not spread Zn
Part to compare Pitting Potential low, so making tubing anti-corrosion by sacrificing corrosion-resisting function, extend the endurance life of tubing.
For aluminium alloy cage walls in embodiment of the present invention, in order that the surface Zn concentration after Zn diffusion heat treatments is
0.5～12%, the condition of adjustment diffusion heat treatments.The meaning of surface Zn concentration is：With EPMA (X-ray microanalysis instrument) decile
During the arbitrfary point of analysis apparatus measurement surface, Zn concentration.If surface Zn concentration ratio 0.5% is low, sacrifice anticorrosion ability is insufficient,
There are deep erosions in early stage.On the other hand, if surface Zn concentration ratio 12% height, corrosion rate increases.Therefore, surface Zn is dense
Spend for 0.5～12%.Preferred scope is 0.5～10.0%, and further preferred range is 3.0～5.0%.
The Zn thickness of diffusion layer of aluminium alloy cage walls in embodiment of the present invention, is 100～300 μm.Zn thickness of diffusion layer
The meaning be：By Zn DIFFUSION TREATMENT, Zn starts the depth of the direction diffusion to thickness of slab from surface.Zn in embodiment of the present invention
Thickness of diffusion layer is：Start the distance (thickness) being 0.05% to Zn concentration from tube surfaces.For Zn diffusion layer, as pipe
Overall sacrifice corrosion-resistant coating plays a role, and if Zn thickness of diffusion layer is too thin, loses in earlier victims corrosion-resistant coating；Zn spreads
If thickness degree is too thick, Zn gradient gradually slows down, and sacrifices anticorrosion ability insufficient.Therefore Zn thickness of diffusion layer is 100～300
μm.This Zn thickness of diffusion layer can also be 150～250 μm.
Next, with regard to the reason that is defined of composition of the skin material to present embodiment cage walls, illustrating.
Zn makes the current potential of skin material decline, and plays a role as sacrificial anode, improves the corrosion resistance of heat pipe.It adds
When amount is less than 1.0%, inadequate with the potential difference of core, cannot sufficiently sacrifice anticorrosion ability, if 7.0%, resistance to
Corrosion declines.Therefore Zn addition is 1.0～7.0% scope.More preferred scope is 4.0～5.5%.
Mn is the main adding elements improving intensity, and if its addition is fewer than 0.3%, intensity is not enough, strong with core
Degree difference becomes big.As a result, producing the small crack (crack) in surface when pipe manufactures, when this becomes hair fastener bending machining
The reason rupture.On the other hand, when addition is more than 1.5%, the current potential of skin material is high, so being difficult to ensure that the electricity with core
Potential difference.Cause, the addition of Mn is 0.3～1.5% scope.More preferred scope is 0.6～1.0%.
The impurity Si of the skin material of cage walls, Fe, Cu etc., if the content of Si be less than 0.5%, Fe be 0.6% with
Under, when Cu is less than 0.2%, do not hinder the effect of the present invention.
In addition Ti, Cr, Zr, because having the effect making ingot bar organize homogeneous granular, can contain, but exceeding
If 0.2%, form huge intermetallic compound or extrudability decline, preferably its content is less than 0.2%.In this scope
If interior, do not hinder the effect of heat pipe in present embodiment.In addition this content can also be 0～0.1%, can also be 0～
0.05%.
The thickness of the skin material of these cage walls, there is no particular limitation, but the 5 of preferably whole wall thickness～
30%.The thickness of skin material all or less than wall thickness 5% when, the effect duration of the sacrifice corrosion-resistant coating of heat exchanger not, surpasses
If crossing 30%, the intensity of heat pipe declines.More preferred scope is 6～15%.
In addition, when the intensity difference of core and skin material is big, because core and skin material non-deformability are variant,
When pipe manufactures, surface produces small crack, the reason rupture when becoming hair fastener bending machining.Therefore, core and skin material
Difference of hardness be below 15Hv.More preferably below 10Hv.
Sacrifice corrosion-resistant coating with regard to Zn spraying plating
Connect lower in, with regard to the sacrifice corrosion-resistant coating to spraying plating pipe in present embodiment, i.e. the Zn distribution of Zn diffusion layer
The reasons why be defined, illustrates.
On the aluminium alloy spraying plating pipe of embodiment of the present invention, after carrying out Zn spraying plating outside it, carry out Zn diffusion
Heat treatment, forms the layer of Zn diffusion.The Pitting Potential that above-mentioned Zn diffusion layer does not spread the part of Zn than in tubing is low, therefore logical
Crossing sacrifice corrosion-resisting function prevents tubing from corroding, and improves the endurance life of tubing.
On aluminium alloy spraying plating pipe, after the Zn composition of the pure Zn of spraying plating or Zn-Al alloy, carry out 30 minutes with 400～550 DEG C
The Zn diffusion heat treatments of～10 hours are preferred.Zn spraying plating amount is 5～28g/m2.Zn spraying plating amount is very little it is difficult in tubing table
Zn is equably adhered in face, and if Zn spraying plating amount is too many, the amount of the Zn after Zn diffusion heat treatments is excessive, and causing corrosion speed increases.
Therefore Zn spraying plating amount is 5～28g/m2.More preferably Zn spraying plating amount 5～25g/m2, more preferably 8～20g/m2.
Aluminium-alloy pipe in embodiment of the present invention, the surface Zn concentration after Zn diffusion heat treatments is 0.5～15%.Surface
The meaning of Zn concentration is：During with the arbitrfary point of the analytical equipment measurement surface such as EPMA, the concentration of Zn.Surface Zn concentration is too low
Words, sacrifice anticorrosion ability is insufficient, and a portion occurs deep erosions in early stage；If surface Zn concentration is too high, lead to
Corrosion rate increases, and the wall thickness of a portion extremely reduces.
In aluminium-alloy pipe in embodiments of the present invention, average surface Zn concentration after Zn diffusion heat treatments is 1～
12%, Zn thickness of diffusion layer is 100～300 μm.So-called average surface Zn concentration, refers to：It is separated by from each other on surface
Arbitrary at least 4 points of more than 5mm, measure, the meansigma methodss obtaining.So-called Zn thickness of diffusion layer, refers to：Expanded by Zn
Dissipate and process, the depth that Zn spreads to thickness of slab direction from surface, Zn thickness of diffusion layer is from tubing table in embodiments of the present invention
Face to Zn concentration be the distance between 0.05%.Average Zn concentration and Zn thickness of diffusion layer, represent that the overall sacrifice of pipe is anti-corrosion
If the amount of erosion layer, average Zn concentration and Zn thickness of diffusion layer are too little, lose in earlier victims corrosion-resistant coating.In addition, it is average
If Zn concentration is too high, causing corrosion speed increases；If Zn thickness of diffusion layer is too thick, Zn gradient slows down, and sacrifices anticorrosion effect
Really insufficient.Therefore, average surface Zn concentration is 1～12%, and preferred scope is 0.5～10.0%, further preferred
Scope is 3.0～5.0%.In addition, Zn thickness of diffusion layer is 100～300 μm or 150～250 μm.
In embodiments of the present invention in aluminium-alloy pipe, the Zn concentration in the arbitrary surfaces after Zn diffusion heat treatments is：Flat
Within ± the 50% of equal surface Zn concentration.With respect to average surface Zn concentration, if surface Zn concentration is too high, only this is partly excellent
First corrode, wall thickness extremely reduces.In order to avoid this occurrence of, arbitrary surfaces Zn concentration need in average surface Zn
Within ± the 50% of concentration.It is preferably within ± 30%.
The Zn coverage rate of so-called spraying plating：The state not adhering to Zn completely is 0%, when entire surface is all adhered to Zn is
100%Z.If the coverage rate height of Zn, Zn distribution is homogeneous, and corrosion resistance improves.In the present invention, Zn coverage rate is more than 90%.More excellent
Select me more than 95%.
Sacrifice the forming method of corrosion-resistant coating
Next, the example of the forming method embodiment with regard to sacrificing corrosion-resistant coating, illustrate.
In the present embodiment on the outside of cylindric base substrate (Billet) of the Al-Mn-Cu alloy of heat pipe, will sacrifice
Anticorrosion sheet alloy bends to cylindrical shape and is covered on outside this, is fabricated to combination base substrate, is heated to heating furnace
350～600 DEG C, carry out homogenize process.Afterwards, base substrate is extruded with indirect extruder, obtain the extruding pipe of 2 layers of cladding.Then,
Above-mentioned extruding pipe is carried out stretch process, is processed into fixed external diameter, wall thickness, obtain the pipe (smooth pipe) of 2 layers of cladding.This draws
Stretch processing, preferably use the high block-drawing formula continuous stretcher of productivity ratio.
In addition, the cylindric base substrate sacrificing anticorrosion material is heated to 350～600 DEG C, inside it on, will be cylindric
Core hollow base substrate hot jacket coordinates (or being translated as " shrink fit "), carries out extrusion processing for the 2 layers of hollow base substrate obtaining, it
Similarly carry out stretch process afterwards, the pipe (smooth pipe) of 2 layers of cladding can be obtained.
Alternatively, it is also possible to be：On the side of the core thin plate (sheet) of aluminium alloy, roll clad sacrifice anticorrosion material is thin
Plate, obtains 2 layers " clad sheets ", and this thin plate roll-in is formed tubulose, afterwards, thin plate interface is welded, as 2 layers of cladding
Resistance weld pipe (Electric resistance welded tube).
As mentioned above and on the 2 layers of cage walls manufacturing, it is diffused heat treatment, Zn diffusion layer can be obtained, that is, sacrifice
Corrosion-resistant coating.
With regard to other than the above sacrifice corrosion-resistant coating forming method for or：(hot-extrudable or comply with being extruded
(conform) extrude), or spraying plating Zn or Al-Zn alloy on the heat pipe of stretching, it is diffused heat treated, form Zn diffusion
Layer, that is, sacrifice corrosion-resistant coating.In order to adhere to the desired amount of Zn in the comprehensive entire surface of circumferencial direction of pipe, by the circle of tubing
When all kernel of section and the line link of Zn spray torch, the angle being formed between the line at circumferential section center, preferably less than 120 °.
Further, the angle being formed between the line at circumferential section center, preferably less than 90 °.For specific method, can enumerate
Example have：The quantity of the Zn spray torch being used generally in flat tube is from 2 methods increasing to more than 3；After spraying plating
Pipe is made to rotate, the method for point spraying plating several times；Make method of pipe or spray torch rotation etc..For Zn spraying plating or
Carry out after implementing rolling and processing, this rolling and processing is to form groove on the inner face of heat pipe.
In addition, carrying out according to the method described above, for forming the pipe (smooth pipe) sacrificing corrosion-resistant coating, in order to easily carry out
The rotary rolling mill of next step operation, carries out annealing softening process in advance and is preferred.In this case, industrially preferably：Annealing temperature
Spend for 300～400 DEG C, the time is 2～8 hours.
The manufacture method of the fluted heat pipe of inner face band
Then, smooth pipe carries out rotary rolling mill with roll process and ball rolling method etc., manufacture and there is ridged fin
The fluted heat pipe of inner face band (Fig. 3).
For the fluted heat pipe of inner face band of present embodiment, can be manufactured various according to the purposes of heat exchanger
Size, for during domestic air conditioning it is contemplated that manufacture pipe productivity ratio, preferably：More than external diameter φ 4.0mm；Hand in view of heat
The miniaturization lightweight of parallel operation, preferably：Below external diameter φ 9.54mm.
In addition, it is contemplated that compressive resistance, preferably more than 0.3mm for the thick t (with reference to Fig. 4) of bottom；In view of heat
The miniaturization lightweight of exchanger, preferably below 0.6mm.
Additionally, it is preferable that：The height H of the ridged fin of inner face is 0.1～0.4mm, the ridged fin of inner face
Vertical angles are 10～40 ° of α, the quantity of inner face ridged fin is more than 40, helical pitch angle beta (inner face ridged fin and pipe range
The angle that direction is formed, with reference to Fig. 5) it is more than 20 °.
It is also possible to carry out annealing softening process after carrying out rotary rolling mill.Its objective is：Remove the processing bringing during rolling
Deformation, makes hair fastener bending machining (serpentine curved processing) easily carry out.Can be：Carry out 2～8 hours about in 300～400 DEG C
Annealing.
The fluted heat pipe of inner face band of present embodiment obtained by fabricated as described above, is processed by expander, bonding
Patchhole (Fig. 2) in aluminium radiator fin.In order to obtain good bonding, it is suitable for carrying out following steps：Set patchhole and
The gap of heat pipe, makes pipe expanding rate (external diameter rate of increase) be 4～6% about.In addition, for expander processing, without mandrel
Machine pipe expanding method, but by giving pipe intrinsic pressure hydraulic pressure pipe expanding method with oil pressure or hydraulic pressure, can be with improve production efficiency.
More than, embodiments of the present invention are illustrated, but these are the example of the present invention, it would however also be possible to employ
Various composition other than the above.
【Embodiment】
<Embodiment 1>
Then, according to embodiment, the present invention will be described in further detail.
By continuously casting, cast the alloy shown in table table 1, external diameter φ 47mm, wall thickness are obtained with indirect extrusion molding
The extruding pipe of 3.5mm.On this extruding pipe, stretch process is carried out with block-drawing formula continuous stretcher, obtain external diameter φ
10mm, the stretching tube of wall thickness 0.45mm.
【Table 1】
On stretching tube obtained by fabricated as described above, after being processed with 360 DEG C of annealing softenings carrying out 2 hours, by inserting
Enter plug (this plug move about plug (Floating plug), bar, carry fluted plug (plug) be integrated), pass through
Travelling mould (Floating dice), processing head (Processing head), mould (Forming dice) is in inner face
On carry out paying the processing of groove, be obtained the fluted heat pipe of following inner face band：External diameter: φ 7mm, the thickness of bottom: 0.35mm,
Height H: 0.22mm of ridged fin, the quantity of ridged fin is 50, vertical angles α: 15 °, helical pitch angle beta: 35 °.And,
Finally processed with 360 DEG C of annealing softenings carrying out 2 hours, complete the fluted heat pipe of inner face band.
The characteristic of the fluted heat pipe of inner face band of the example for the present invention obtained as described above and comparative example,
Carry out following test.Table 2 shows the result obtaining.
(a) tension test
In order to measure the intensity of the fluted heat pipe of inner face band, carry out tension test according to JIS Z2241.
(b) average crystallite particle diameter
From the fluted heat pipe of inner face band obtaining, cut out microstructure observation's test film, carry out average crystallite grain
The measurement in footpath.Specifically, the measurement of average crystallite particle diameter adopts intersection, in thickness of pipe direction and this 2 directions of circumferencial direction
On carry out, try to achieve its meansigma methods.
(c) tube expanding workability
Using steel mandrel, the fluted heat pipe of inner face band of above-mentioned external diameter φ 7mm is carried out expander processing, made outer
Footpath increases by 5%.Afterwards, observe the section of pipe, the decrement of measurement ridged fin height H, assess fin breakage.For
Obtain the thermal conduction characteristic of heat exchanger, this fin breakage is preferably below 0.02mm.
(d) hair fastener bendability
By fluted for φ 7mm inner face band tube bending, enter the hair fastener bending machining that line space (Pitch) is 16mm.Right
Surface after bending machining carries out visual observations, confirms whether surface ruptures.Now, prepare respectively for S1～S17
The fluted pipe of 10 inner face bands, is estimated according to benchmark once.
○:10 all do not rupture generation.
△: only 1～9 does not rupture.
×: 10 whole rupture.
【Table 2】
Illustrate for the assessment result shown in table 2.Embodiment S1～S11 is the product in the scope of the invention, its machine
Tool property, fin breakage, average crystallite particle diameter, there is crack-free to occur during hair fastener bending machining, all excellent.And comparative example
S12, S15, cannot desired thermal conduction characteristics because low intensity fin breakage is big.In addition, S13, S14 is in stretch process
There is tension failure, do not manufacture.In addition, S16 is because average crystallite particle diameter is more than 150 μm, in hair fastener bending machining
There is rupture.In addition, S17 crystal grain small although not rupturing in hair fastener bending machining, but because Si content pole
Low, generate the problem that：Manufacturing cost is high.
<Embodiment 2>
By continuously casting, cast the skin material alloy shown in table 3, by the core alloy shown in table 1 and table 4
In combination, with indirect extrusion molding extrude external diameter φ 47mm, wall thickness 3.5mm, clad ratio is 10% extruding pipe.In this extruding pipe
On stretch process is carried out with block-drawing formula continuous stretcher, obtain external diameter φ 10mm, the stretching tube of wall thickness 0.45mm.
Carry out Zn diffusion heat treatments further.
【Table 3】
【Table 4】
On the stretching tube being obtained according to above-mentioned described step, after being processed with 360 DEG C of annealing softenings carrying out 2 hours,
By inserting plug, (this plug is travelling plug (Floating plug), bar, carries fluted plug (plug) to be integrated
), by the mould (Floating dice) that moves about, processing head (Processing head), mould (Forming
Dice) carry out paying the processing of groove on inner face, the fluted heat pipe of following inner face band is obtained：External diameter: φ 7mm, bottom
Thickness: 0.35mm, height H: 0.22mm of ridged fin, the quantity of ridged fin is 50, vertical angles α: 15 °, helical pitch
Angle beta: 35 °.And, finally processed with 360 DEG C of annealing softenings carrying out 2 hours, complete the fluted heat pipe of inner face band.
Characteristic to the fluted heat pipe of inner face band obtained by such manufacture, has carried out following test.Table 5 shows
The result arriving.
(a) tension test
In order to measure the intensity of the fluted heat pipe of inner face band, carry out tension test according to JIS Z2241.
(b) section hardness
Measuring above-mentioned external diameter is the core of the fluted heat pipe of inner face band of φ 7mm and the hardness of skin material.In addition,
The measuring process of hardness is as follows：With the fluted tube section of resin filling tape, after grinding, using micro Vickers (Micro
Vickers hardness tester, alum makes manufactured) measured under conditions of load 50g.
(c) hair fastener bendability
By fluted for φ 7mm inner face band tube bending, enter the hair fastener bending machining that line space (Pitch) is 16mm.Right
Surface after bending machining carries out visual observations, confirms whether surface ruptures.Now, prepare respectively for C1～C12
The fluted pipe of 10 inner face bands, is estimated according to benchmark once.
○:10 all do not rupture generation.
△: only 2～9 do not rupture.
×: there are 9～10 ruptures.
(d) corrosion resistance
In order to assess outside corrosion resistance, for each fluted heat pipe of inner face band, carry out 1500 according to JISZ8681
The CASS test of individual hour.After test, remove the corrosion product on the surface of test pipe, observe the corrosion condition of pipe,
Assess outside corrosion resistance according to having or not perforation.At this moment, for C1～C12, the fluted heat pipe of 10 inner face bands of preparation respectively,
It is estimated according to following benchmark.
○:All do not bore a hole for 10.
△: only 2～9 do not bore a hole.
×: 9～10 have perforation.
【Table 5】
Illustrate for the assessment result shown in table 5.For C1～C8, the difference of hardness of core and skin material is little,
Do not rupture during hair fastener bending machining.In addition, corrosion resistance is also good.On the other hand, the poor C9 of Mn, its core and epidermis
The difference of hardness of material is big, and during stretch process, surface mountain occurs small scar, becomes and ruptures rising of generation during hair fastener bending machining
Point.C10 more than Mn content, the potential difference of its core and skin material is little, and result is：Perforation is occurred in that in Kesternich test.Separately
Outward, the C11 more than Zn content, its corrosion resistance is poor, and result is：Perforation is occurred in that in Kesternich test.And the less C12 of Zn content,
Anticorrosion ability can not sufficiently be sacrificed, Kesternich test creates perforation.
<Embodiment 3>
By continuously casting, cast the S10 alloy of table 1, external diameter φ 47mm is obtained with indirect extrusion molding, wall thickness 3.5mm's
Extruding pipe.With block-drawing formula continuous stretcher, stretch process is carried out to this extruding pipe, obtains external diameter φ 10mm, wall thickness
The stretching tube of 0.45mm.
On stretching tube obtained by fabricated as described above, after being processed with 360 DEG C of annealing softenings carrying out 2 hours, by inserting
Enter plug (this plug move about plug (Floating plug), bar, carry fluted plug (plug) be integrated), pass through
Travelling mould (Floating dice), processing head (Processing head), mould (Forming dice) is in inner face
On carry out paying the processing of groove, be obtained the fluted heat pipe of following inner face band：External diameter: φ 7mm, the thickness of bottom: 0.35mm,
Height H: 0.22mm of ridged fin, the quantity of ridged fin is 50, vertical angles α: 15 °, helical pitch angle beta: 35 °.And,
Finally processed with 360 DEG C of annealing softenings carrying out 2 hours, complete the fluted heat pipe of inner face band.
On the fluted heat pipe of inner face band being so obtained, carry out impeller blasting (shot blasting) process, Zn
Spraying plating, Zn diffusion heat treatments, complete the fluted heat pipe of inner face band with Zn diffusion layer.Zn spraying plating, Zn diffusion heat treatments
Condition as shown in table 6.
【Table 6】
Characteristic for the fluted heat pipe of inner face band being so obtained is evaluated, and has carried out following test.Table 7 shows
Show the result obtaining.
A () Zn is distributed
In order to detect the surface Zn concentration after Zn diffusion heat treatments, Zn diffusion length, carry out EPMA.Detection method is：
For each sample, carry out the detection of 10 points, and these point the distance between be more than 5mm.
(b) Zn coverage rate
In order to detect the Zn coverage rate after Zn diffusion heat treatments, using the COMPO image of SEM.If being covered by Zn
Obtain white image；If substrate Al is exposed, obtain black image.Analysis diagram picture, calculates Zn coverage rate.
(c) corrosion resistance
In order to assess outside corrosion resistance, for each fluted heat pipe of inner face band, carry out 1500 according to JISZ8681
The CASS test of hour.After test, remove the corrosion product on the surface of test pipe, observe the corrosion condition of pipe, according to
Assess outside corrosion resistance according to having or not perforation.At this moment, for Y10～Y21, the fluted heat pipe of 10 inner face bands of preparation respectively,
It is estimated according to following benchmark.
All do not bore a hole for zero: 10.
△: only 2～9 do not bore a hole.
×: 9～10 have perforation.
【Table 7】
Illustrate for the assessment result shown in table 7.In Y1～Y9, do not produce insertion and corrode it is shown that good is resistance to
Corrosion.Y10, in 12 because being not reaching to the lower limit of surface Zn concentration, because being not reaching to average surface Zn concentration in Y14
Lower limit, sacrifices anticorrosion and does not effectively play a role, and leads to early stage to produce insertion.Because Y11, exceeding surface Zn concentration in 13
The upper limit, exceed the upper limit of average surface Zn concentration in Y15, sacrifice layer consumes fast, reaches insertion in early days.Y16, in 17 because super
Cross the upper limit of Zn concentration difference, corrosion is concentrated, lead to early stage to reach insertion.Because being not reaching to the lower limit of Zn diffusion length in Y18,
The amount of sacrifice layer is few, leads to early stage to reach insertion.Because of the upper limit more than Zn diffusion length in Y19, Zn gradient slows down, and sacrifices anti-
Corrosion does not play a role effectively, leads to early stage to reach insertion.Y20, in 21 because Zn coverage rate is not up to lower limit, corrosion collection
In, lead to early stage to reach insertion.
Described the present invention with embodiment above.This embodiment is example, can have various modifications example, this
A little variation fall within the scope of the present invention, and this is for understood by one of ordinary skill in the art.
【The explanation of symbol】
1 aluminium radiator fin
2 heat pipes (the fluted heat pipe of inner face band)
3 transom windows (Louver)
4 expander plugs (mandrel)
5 pipes (smooth pipe)
6 rolling plugs (Rolled plug)
7 rotating rollers (Rotating roll)
8 inner faces carry the heat pipe of spiral grooves
9 ridged fin
10 sacrifice corrosion-resistant coatings
Claims (7)
1. a kind of fluted aluminium alloy heat pipe of inner face band it is characterised in that：
Forming 2 or the heat pipe of more ridged fin on inner face is aluminium alloy heat pipe, containing Mn: 0.8～1.8
Quality %, Cu: 0.3～0.8 mass %, and Si: 0.02～0.2 mass %, remainder is by inevitable impurity and Al
Composition；And, the section average crystallite particle diameter of above-mentioned heat pipe is less than 150 μm, vertical angles α of inner face ridged fin are 10
～40 °, on the surface of above-mentioned heat pipe, surface Zn concentration is more than 0.5 mass %, and average surface Zn concentration is 1～12
Quality %, and within ± 50 mass % for average surface Zn concentration for the concentration on arbitrary surface, and have, from surface
The Zn diffusion depth starting is 100～300 μm of Zn diffusion layer.
2. the fluted aluminium alloy heat pipe of inner face band as described in claim 1 it is characterised in that：
With aluminium alloy heat pipe as core, the outside cladding skin material Al-Zn alloy of this aluminium alloy heat pipe, then carry out
Zn diffusion heat treatments.
3. the fluted aluminium alloy heat pipe of inner face band as described in claim 2 it is characterised in that：
The difference of hardness of the above-mentioned core after above-mentioned Zn diffusion heat treatments and above-mentioned skin material is below 15Hv.
4. the inner face band fluted aluminium alloy heat pipe as described in Claims 2 or 3 it is characterised in that：
Above-mentioned skin material contains Zn: 1.0～7.0 mass %, Mn: 0.3～1.5 mass %, and remainder is inevitable
Impurity and Al.
5. the fluted aluminium alloy heat pipe of inner face band as described in claim 1 it is characterised in that：
Containing Mn: 0.8～1.8 mass %, Cu: 0.3～0.8 mass %, and Si: 0.02～0.2 mass %, remainder is
Inevitably impurity and Al,
And, the average crystallite particle diameter of above-mentioned heat conduction tube section is less than 150 μm；
Spraying plating Zn on the outer surface of above-mentioned aluminium alloy heat pipe, then carry out Zn diffusion heat treatments.
6. the fluted aluminium alloy heat pipe of inner face band as described in claim 5 it is characterised in that：
With respect to the outer surface of heat pipe, the coverage rate of the Zn of institute's spraying plating is more than 90 mass %.
7. the manufacture method of the inner face band fluted aluminium alloy heat pipe as described in claim 5 or 6, its feature exists
In：
When above-mentioned heat pipe carries out spraying plating, in the geometry center of above-mentioned heat conduction tube section and more than 2 Zn spray torches
The heart is connected, and adjacent connecting line is less than 120 ° in above-mentioned geometry center institute angulation respectively, and described more than 2 include
2.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012092193 | 2012-04-13 | ||
| JP2012-092193 | 2012-04-13 | ||
| PCT/JP2013/059747 WO2013153972A1 (en) | 2012-04-13 | 2013-03-29 | Heat exchange tube attached with aluminum alloy inner groove |
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| Publication Number | Publication Date |
|---|---|
| CN104246417A CN104246417A (en) | 2014-12-24 |
| CN104246417B true CN104246417B (en) | 2017-02-22 |
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| CN201380019372.2A Expired - Fee Related CN104246417B (en) | 2012-04-13 | 2013-03-29 | Heat exchange tube attached with aluminum alloy inner groove |
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| Country | Link |
|---|---|
| JP (1) | JP6105561B2 (en) |
| KR (1) | KR20140146184A (en) |
| CN (1) | CN104246417B (en) |
| IN (1) | IN2014DN08791A (en) |
| WO (1) | WO2013153972A1 (en) |
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| JP6391138B2 (en) * | 2012-12-27 | 2018-09-19 | 三菱アルミニウム株式会社 | Manufacturing method of internally spiral grooved tube |
| JP6301653B2 (en) * | 2012-12-27 | 2018-03-28 | 三菱アルミニウム株式会社 | Manufacturing method of internally spiral grooved tube |
| JP6391140B2 (en) * | 2012-12-27 | 2018-09-19 | 三菱アルミニウム株式会社 | Manufacturing method of internally spiral grooved tube |
| JP6391139B2 (en) * | 2012-12-27 | 2018-09-19 | 三菱アルミニウム株式会社 | Manufacturing method of internally spiral grooved tube |
| JP6304862B2 (en) * | 2013-07-18 | 2018-04-04 | 三菱アルミニウム株式会社 | Manufacturing method of heat exchanger |
| EP3066406B1 (en) | 2013-11-06 | 2018-01-10 | BSH Hausgeräte GmbH | Heat pump for a household appliance |
| EP2871432A1 (en) * | 2013-11-06 | 2015-05-13 | BSH Hausgeräte GmbH | Heat pump for a household appliance |
| FR3079604B1 (en) * | 2018-03-27 | 2020-06-26 | Systemair Ac Sas | HIGH PERFORMANCE ANTI-FROST EXCHANGER |
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| CN101124451A (en) * | 2005-02-17 | 2008-02-13 | 住友轻金属工业株式会社 | Aluminum alloy brazing fin material for heat exchanger |
| CN102286679A (en) * | 2011-09-02 | 2011-12-21 | 上海交通大学 | Rare earth aluminum alloy used for heat exchanger and preparation method thereof |
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|---|---|---|---|---|
| JPH0860313A (en) * | 1994-08-24 | 1996-03-05 | Furukawa Electric Co Ltd:The | Production of aluminum alloy tube excellent in strength and form rollability |
| JP3756141B2 (en) * | 2002-10-02 | 2006-03-15 | 株式会社デンソー | Aluminum alloy pipe material for automobile piping excellent in corrosion resistance and workability and manufacturing method thereof |
| JP4266919B2 (en) * | 2004-11-30 | 2009-05-27 | 株式会社デンソー | Aluminum alloy clad material for heat exchangers with excellent erosion / corrosion resistance and general corrosion resistance |
| JP5574595B2 (en) * | 2008-10-02 | 2014-08-20 | 三菱アルミニウム株式会社 | Aluminum alloy extruded tube for fin tube type air conditioner heat exchanger |
| JP2010085065A (en) * | 2008-10-02 | 2010-04-15 | Mitsubishi Alum Co Ltd | Aluminum alloy extrusion tube for fin tube type air conditioner heat exchanger |
| JP5476030B2 (en) * | 2009-04-21 | 2014-04-23 | 株式会社Ｕａｃｊ | Clad material for welded tube of aluminum alloy heat exchanger and manufacturing method thereof |
| JP2011007383A (en) * | 2009-06-24 | 2011-01-13 | Sumitomo Light Metal Ind Ltd | Aluminum alloy heat exchanger and method for manufacturing refrigerant passage pipe used for the same |
| JP6154610B2 (en) * | 2010-07-13 | 2017-06-28 | 株式会社Uacj | Aluminum alloy inner surface grooved heat transfer tube |
-
2013
- 2013-03-29 WO PCT/JP2013/059747 patent/WO2013153972A1/en active Application Filing
- 2013-03-29 IN IN8791DEN2014 patent/IN2014DN08791A/en unknown
- 2013-03-29 KR KR1020147031665A patent/KR20140146184A/en not_active Application Discontinuation
- 2013-03-29 JP JP2014510116A patent/JP6105561B2/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101124451A (en) * | 2005-02-17 | 2008-02-13 | 住友轻金属工业株式会社 | Aluminum alloy brazing fin material for heat exchanger |
| CN102286679A (en) * | 2011-09-02 | 2011-12-21 | 上海交通大学 | Rare earth aluminum alloy used for heat exchanger and preparation method thereof |
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| Publication number | Publication date |
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| IN2014DN08791A (en) | 2015-05-22 |
| WO2013153972A1 (en) | 2013-10-17 |
| KR20140146184A (en) | 2014-12-24 |
| CN104246417A (en) | 2014-12-24 |
| JP6105561B2 (en) | 2017-03-29 |
| JPWO2013153972A1 (en) | 2015-12-17 |
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