CN100500904C - Aluminum foil used for heat exchanger and manufacturing method thereof - Google Patents
Aluminum foil used for heat exchanger and manufacturing method thereof Download PDFInfo
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Abstract
The invention relates to an aluminum foil used for heat exchangers and the manufacturing method thereof. The components of the aluminum foil comprise Al, Si, Fe, Cu, Ti and inevitable impurity, and further comprise V. The weight contents of the components are as follows: Al: more than or equal to 98.50 percent, Si: 0.10-0.35 percent, Fe: 0.50-0.90 percent, Cu: 0.01-0.10 percent, V: 0.005-0.05 percent, Ti: 0.01-0.05 percent, and impurity in balance. The inventive aluminum foil used for heat exchangers and the manufacturing method thereof have the advantages of stable performance, good plate shape and good quality of plate surface, low cost, good mechanical property and molding property (even the thickness of aluminum foil is reduced to 0.080-0.094mm).
Description
Technical field
The present invention relates to a kind of aluminium alloy foil material, more particularly, the present invention relates to aluminium alloy foil material and manufacture method thereof that a kind of heat-exchanger fin is used.
Background technology
Along with improving constantly of people's living standard, the demand of conditioner and supply the market development are swift and violent, and China has become maximum in the world conditioner production base at present.Fin that the heat exchanger of conditioner is made by aluminium alloy foil material usually (through the deep-draw moulding) and the metal tube that passes fin assemble.Metal tube passes the punching position on the fin, and behind the pipe that rises, metal tube and fin fit tightly, and during the conditioner running, refrigeration agent is by metal tube and fin and extraneous heat-shift.If the punching position cracking of fin can make the applying of fin and metal tube insufficient, influence the heat exchange effect, obviously, thin material easier generation punching cracking and flange cracking.
Meanwhile, conditioner just develops towards small-sized, light weight, high-performance, efficient, energy-conservation, attractive in appearance direction, thereby requires that fin is thinner, installing space is littler, over-all properties is higher, adapts to punching out speed faster.In order to reach above-mentioned requirements, correspondingly need the heat-exchanger fin material to have higher intensity and toughness, under the continuous attenuate condition of alumium Foil for air conditioner thickness, still require to keep its original performance index, and in high speed punching out and turn-up process breach not.In order fully to satisfy the demand of conditioner manufacturing firm to the continuous thinning of air-conditioning paper tinsel, guarantee stabilizing and increasing of air-conditioning paper tinsel quality, aluminum fabrication plant is also carrying out technical study and tackling key problem always both at home and abroad.For this reason, develop thinner alumium Foil for air conditioner, and keep the stable alumium Foil for air conditioner exploitation of product performance imperative.
Summary of the invention
Development trend and requirement at aluminium alloy foil material for heat exchanger fin, the objective of the invention is to provide a kind of aluminium foil for heat exchanger and manufacture method thereof, it has following advantage: product performance are stable, plate shape and plate face quality are good, with low cost, when aluminium foil is thinned to 0.080mm-0.094mm, still maintain favorable mechanical performance and processability.
For this reason, one of technical solution of the present invention is a kind of aluminium foil for heat exchanger, the component of its material comprises Al, Si, Fe, Cu, Ti and unavoidable impurities, and described aluminium foil material component also comprises V, and the weight content of these components is as follows: Al 〉=98.50%, Si:0.10-0.35%, Fe:0.50-0.90%, Cu:0.01-0.10%, V:0.005-0.05%, Ti:0.01-0.05%, impurity: surplus.
Consider and work as the aluminium alloy foil material finished product under very thin state, guarantee that it has good plasticity, its tissue and performance must be evenly, and metallurgical imperfection is few, and anisotropy is little, and desired strength is fit to simultaneously, and ductility is good, could guarantee the high speed punching out quality of aluminium foil.For this reason, the present invention is on the basis of the general aluminum substrate of industry, material component by reasonably combined Si, Fe, Cu, V, the incompatible formation of Ti element set uniqueness of the present invention, by such unique chemical composition, guarantee that organizing of alloy aluminium foil is even more, come to provide the favorable mechanical processing characteristics to guarantee: wherein for the aluminium foil of finished product thickness 0.080mm-0.094mm, by control iron, silicone content ratio, improve cast structure, reduce the fragility impurity phase in the aluminium alloy, improve the plasticity of alloy, be beneficial to machine-shaping, and reduce infringement mould; Control copper, content of vanadium ratio, the tensile strength and the yield strength of raising finished product, yield strength satisfies high speed punching out requirement when guaranteeing reduced thickness; Control vanadium, titanium content ratio, the annealing temperature interval of improving finished product, the stability of the performance of guaranteeing to anneal, and crystal grain thinning, make organize more even.The present invention allocates, tests the proportioning of material component according to the theory of above-mentioned pool, has the performance of good anti-high speed punching out to guarantee product of the present invention.
Evidence: the material component of uniqueness of the present invention, the reasonable process conditions of determining with experiment combines, can relax excessive demand to aluminium purity, adopt lower cost, purity suitably as 98.70% aluminium, just can reach good mechanical property and processability, material cost is cheap relatively, can guarantee still that but following process goes out the stable aluminium foil of product performance.
The improvement of aluminium foil for heat exchanger of the present invention also comprises following further content:
The weight content of described aluminium foil material component is: Al 〉=98.90%, Si:0.20-0.30%, Fe:0.68-0.80%, Cu:0.02-0.05%, V:0.01-0.03%, Ti:0.015-0.030%, impurity: surplus.
To be described material make through melting, rolling, thermal treatment described aluminium foil, and the thickness of aluminum foil finished product is 0.080～0.12mm.The tensile strength of described aluminium foil is 115～135Mpa, yield strength 〉=105Mpa.Erichsen number 〉=the 6.0mm of described aluminium foil, unit elongation 〉=16%.
Correspondingly, a correlation technique solution of the present invention is a kind of manufacture method of aluminium foil for heat exchanger as mentioned above, the step of this method combination is commonly called as and is the DC method, it comprises the steps: the material of deployed component is carried out melting, casting, homogenizing, hot rolling, cold rolling, anneal, particularly:
The temperature of described melting step is controlled at 745-765 ℃, and described casting temp is controlled at 690-710 ℃;
The holding temperature of described homogenizing step is controlled at 550-610 ℃, 5-30 hours metal heat preservation time;
In the described hot-rolled step, start rolling temperature is controlled at 480～530 ℃, and finishing temperature is controlled at 250～310 ℃;
The temperature of described anneal step is controlled at 210～240 ℃, 5-30 hour metal heat preservation time.
Described hot rolling makes the slab of thickness between 5.0-7.0mm, gets the aluminium foil of thickness 0.080～0.12mm again through cold rolling.
Correspondingly, the manufacture method that another correlation technique solution of the present invention is a kind of aluminium foil for heat exchanger as previously mentioned, the step of this method combination is commonly called as and is the CC method, and it comprises the steps: the material of deployed component is carried out melting, casting, cold rolling, anneal, particularly:
Described smelting temperature is controlled at 745-765 ℃;
In the described casting step, control the interior melt temperature of the preceding case of casting at 690-710 ℃, roll casting speed 900-1200mm/min;
The thermal treatment temp of described anneal step is controlled at 260～290 ℃, 5-30 hour metal heat preservation time.
Described casting makes the slab of thickness between 5.0-7.0mm at last, gets the aluminium foil of thickness 0.080～0.12mm again through cold rolling.
Passage cold rolling described in the top manufacture method is between 5-7.
The manufacture method DC method of above-mentioned two aluminium foils of the present invention, CC method adopt the manufacturing condition of optimizing, and further guarantee the good interior tissue of aluminium foil, produce the aluminium foil of good mechanical property and processing characteristics, and constant product quality.
Evidence: compared with prior art, the present invention brings following outstanding effect in material and technologic improvement: under same thickness, product has suitable intensity and more excellent unit elongation and Erichsen number, anisotropy is little, can adapt to heat-exchanger fin and not ftracture than big highly piercing and flanging needs.And when aluminium foil was thinned to 0.080-0.094mm, aluminium foil still can keep more excellent mechanical property and forming property, and the high speed punching is not ftractureed.This aluminium foil homogeneous microstructure, finished product tensile strength are moderate, unit elongation and Erichsen number height, the well processed processability is arranged, and satisfy the high speed punching out service requirements of conditioner producer fully.And the processing temperature of technology of the present invention is moderate, process period is suitable, and the unit power consumption of polymer processing is saved, and tooling cost is lower.
The present invention will be further described below in conjunction with specific embodiment.
At first, make following comparative example 1,2 according to some condition of embodiment:
Comparative example 1:
The chemical ingredients of material: table one
| Aluminium content (%) | Si | Fe | Cu | V | Ti | Impurity |
| 99.340 | 0.06 | 0.51 | 0.01 | 0.0005 | 0.0008 | Surplus |
Manufacture method one (DC method):
(1) calculates and gets ready material by above-mentioned target component, to melt in most of raw material adding smelting furnace, smelting temperature is controlled at 740 ℃, go into to leave standstill stove through refining, slagging-off, stirring, analysis and adjustment composition are laggard, leave standstill, refining, degasification, slagging-off, add in aluminium liquid and enter casting machine behind the Al-5Ti-1B silk and be cast as the plate ingot, the casting technique temperature is controlled at 700 ℃;
(2) holding temperature of homogenizing processing is controlled at 610 ℃, 30 hours metal heat preservation time;
(3) the hot rolled start rolling temperature is controlled at 510 ℃, and finishing temperature is controlled at 260 ℃, and the finish to gauge slab thickness is controlled at 7.5mm;
(4) hot rolling slab is by the rolling finished product thickness 0.105～0.12mm that gets of 7 passages;
The thermal treatment temp of (5) thermal treatment (annealing) is controlled at 240 ℃, 30 hours metal heat preservation time.
Manufacture method two (CC method):
The smelting temperature of (1) casting (CC method) step is controlled at 770 ℃, and the interior melt temperature of case is controlled at 695 ℃ before the casting, roll casting speed 900m/min, and casting becomes 7.0mm casting roll bending base;
(2) cast-rolled block through cold rolling be the finished product aluminium foil of thickness 0.105～0.12mm;
(3) thermal treatment (annealing) temperature is controlled at 250 ℃, 30 hours metal heat preservation time.
Comparative example 2: finished product thickness 0.090-0.095mm, all the other are with comparative example 1.
Embodiment
Embodiment 1:
The chemical ingredients of material: table two
| Aluminium content (%) | Si | Fe | Cu | V | Ti | Impurity |
| 98.990 | 0.20 | 0.70 | 0.04 | 0.02 | 0.025 | Surplus |
Manufacture method one (DC method):
(1) calculates and gets ready material by above-mentioned target component, to melt in most of raw material adding smelting furnace, smelting temperature is controlled at 750 ℃, go into to leave standstill stove through refining, slagging-off, stirring, analysis and adjustment composition are laggard, leave standstill, refining, degasification, slagging-off, add in aluminium liquid and enter casting machine behind the Al-5Ti-1B silk and be cast as the plate ingot, casting technological parameter: casting temp is controlled at 690 ℃;
(2) holding temperature of homogenizing processing is controlled at 550 ℃, 30 hours metal heat preservation time;
(3) the hot rolled start rolling temperature is controlled at 530 ℃, and the hot rolled finishing temperature is controlled at 280 ℃, and the finish to gauge slab thickness is controlled at 5.5mm;
(4) hot rolling slab is by the rolling finished product aluminium foil that gets 0.085～0.091mm thickness of 6 passages;
(5) thermal treatment (annealing) temperature is controlled at 220 ℃, 25 hours metal heat preservation time.
Manufacture method two (CC method):
The smelting temperature of (1) casting (CC method) is controlled at 755 ℃, and the interior melt temperature control of case is 690-710 ℃ before the casting, roll casting speed 1100mm/min, and casting becomes 6.0mm casting roll bending base;
(2) slab through cold rolling be the finished product aluminium foil of 0.085～0.091mm thickness;
(3) thermal treatment (annealing) temperature is controlled at 260 ℃, 21 hours metal heat preservation time.
Embodiment 2:
The chemical ingredients of material: table three
| Aluminium content (%) | Si | Fe | Cu | V | Ti | Impurity |
| 98.70 | 0.27 | 0.82 | 0.035 | 0.02 | 0.03 | Surplus |
Making method one (DC method):
(1) calculates and gets ready material by above-mentioned target component, to melt in most of raw material adding smelting furnace, smelting temperature is controlled at 765 ℃, go into to leave standstill stove through refining, slagging-off, stirring, analysis and adjustment composition are laggard, leave standstill, refining, degasification, slagging-off, add in aluminium liquid and enter casting machine behind the Al-5Ti-1B silk and be cast as the plate ingot, casting technological parameter: casting temp is controlled at 700 ℃;
(2) holding temperature of homogenizing processing is controlled at 610 ℃, 10 hours metal heat preservation time;
(3) the hot rolled start rolling temperature is controlled at 510 ℃, and the hot rolled finishing temperature is controlled at 290 ℃, and the finish to gauge slab thickness is controlled at 5.0mm;
(4) hot rolling slab gets the finished product aluminium foil of 0.101～0.115mm thickness by 6 passage cold rollings;
(5) thermal treatment (annealing) temperature is controlled at 230 ℃, 19 hours metal heat preservation time.
Manufacture method two (CC method):
The smelting temperature of (1) casting (CC method) is controlled at 750 ℃, and the interior melt temperature control of case is 690-710 ℃ before the casting, roll casting speed 1000mm/min, and casting is rolled into 5.5mm casting roll bending base;
(2) slab through cold rolling be the finished product aluminium foil of 0.101～0.115mm thickness;
(3) thermal treatment (annealing) temperature is controlled at 270 ℃, 20 hours metal heat preservation time.
Embodiment 3:
The chemical ingredients of material: table four
| Aluminium content (%) | Si | Fe | Cu | V | Ti | Impurity |
| 98.90 | 0.28 | 0.74 | 0.035 | 0.015 | 0.015 | Surplus |
Making method one (DC method):
(1) calculates and gets ready material by above-mentioned target component, to melt in most of raw material adding smelting furnace, smelting temperature is controlled at 755 ℃, go into to leave standstill stove through refining, slagging-off, stirring, analysis and adjustment composition are laggard, leave standstill, refining, degasification, slagging-off, add in aluminium liquid and enter casting machine behind the Al-5Ti-1B silk and be cast as the plate ingot, casting technological parameter: casting temp is controlled at 695 ℃;
(2) holding temperature of homogenizing processing is controlled at 600 ℃, 15 hours metal heat preservation time;
(3) the hot rolled start rolling temperature is controlled at 480 ℃, and the hot rolled finishing temperature is controlled at 310 ℃, and the finish to gauge slab thickness is controlled at 7.0mm;
(4) hot rolling slab gets the finished product aluminium foil of 0.095～0.100mm thickness by 6 passage cold rollings;
(5) thermal treatment (annealing) temperature is controlled at 240 ℃, 17 hours metal heat preservation time.
Manufacture method two (CC method):
The smelting temperature of (1) casting (CC method) is controlled at 765 ℃, and the interior melt temperature of case is controlled at 690-710 ℃ before the casting, roll casting speed 900mm/min, and casting obtains the casting roll bending base of 6.5mm thickness;
(2) slab through cold rolling be the finished product aluminium foil of 0.095～0.100mm thickness;
(3) thermal treatment (annealing) temperature is controlled at 265 ℃, 22 hours metal heat preservation time.
Embodiment 4:
The chemical ingredients of material: table five
| Aluminium content (%) | Si | Fe | Cu | V | Ti | Impurity |
| 99.00 | 0.20 | 0.69 | 0.045 | 0.03 | 0.02 | Surplus |
Making method one (DC method):
(1) calculates and gets ready material by above-mentioned target component, to melt in most of raw material adding smelting furnace, smelting temperature is controlled at 765 ℃, go into to leave standstill stove through refining, slagging-off, stirring, analysis and adjustment composition are laggard, leave standstill, refining, degasification, slagging-off, add in aluminium liquid and enter casting machine behind the Al-5Ti-1B silk and be cast as the plate ingot, casting technological parameter: casting temp is controlled at 710 ℃;
(2) holding temperature of homogenizing processing is controlled at 580 ℃, 25 hours metal heat preservation time;
(3) the hot rolled start rolling temperature is controlled at 500 ℃, and the hot rolled finishing temperature is controlled at 250 ℃, and the finish to gauge slab thickness is controlled at 6.0mm;
(4) hot rolling slab gets the finished product aluminium foil of 0.080～0.090mm thickness by 6 passage cold rollings;
(5) thermal treatment (annealing) temperature is controlled at 210 ℃, 30 hours metal heat preservation time.
Manufacture method two (CC method):
The smelting temperature of (1) casting (CC method) is controlled at 755 ℃, and the interior melt temperature of case is controlled at 690-710 ℃ before the casting, roll casting speed 1200mm/min, and casting obtains 5.0mm casting roll bending base;
(2) slab through cold rolling be the finished product aluminium foil of 0.080～0.090mm thickness;
(3) thermal treatment (annealing) temperature is controlled at 290 ℃, 19 hours metal heat preservation time.
Above-mentioned serial embodiment and comparative example tested obtain performance index such as following table:
Table six
Contrast as seen from the test data of the foregoing description and comparative example, aluminium foil homogeneous microstructure of the present invention, finished product tensile strength be good, under same thickness, product has better intensity and more excellent unit elongation and Erichsen number, anisotropy is little, can adapt to the piercing and flanging of the big height of heat-exchanger fin and do not ftracture, and when aluminium foil is thinned to 0.080-0.094mm, aluminium foil still can keep more excellent mechanical property and forming property, the well processed processability is arranged, can satisfy of the requirement of conditioner producer fully high speed punching out processing.
Claims (10)
1, a kind of aluminium foil for heat exchanger, the component of its material comprises Al, Si, Fe, Cu, Ti and unavoidable impurities, it is characterized in that: described aluminium foil material component also comprises V, the weight content of these components is as follows: Al 〉=98.50%, Si:0.10-0.35%, Fe:0.50-0.90%, Cu:0.01-0.10%, V:0.005-0.05%, Ti:0.01-0.05%, impurity: surplus.
2, aluminium foil for heat exchanger according to claim 1, it is characterized in that: the weight content of described aluminium foil material component is: Al 〉=98.90%, Si:0.20-0.30%, Fe:0.68-0.80%, Cu:0.02-0.05%, V:0.01-0.03%, Ti:0.015-0.030%, impurity: surplus.
3, aluminium foil for heat exchanger as claimed in claim 1 or 2 is characterized in that: to be described material make through melting, rolling, thermal treatment described aluminium foil, and the thickness of aluminum foil finished product is 0.080～0.12mm.
4, as aluminium foil for heat exchanger as described in the claim 3, it is characterized in that: the tensile strength of described aluminium foil is 115～135MPa, yield strength 〉=105MPa.
5, as aluminium foil for heat exchanger as described in the claim 3, it is characterized in that: the Erichsen number 〉=6.0mm of described aluminium foil, unit elongation 〉=16%.
6, a kind of manufacture method as aluminium foil for heat exchanger as described in one of claim 1-5, it comprises the steps: the material of deployed component is carried out melting, casting, homogenizing, hot rolling, cold rolling, anneal, it is characterized in that:
The temperature of described melting step is controlled at 745-765 ℃, and described casting temp is controlled at 690-710 ℃;
The holding temperature of described homogenizing step is controlled at 550-610 ℃, 5-30 hours metal heat preservation time;
In the described hot-rolled step, start rolling temperature is controlled at 480～530 ℃, and finishing temperature is controlled at 250～310 ℃;
The temperature of described anneal step is controlled at 210～240 ℃, 5-30 hour metal heat preservation time.
7, as the manufacture method of aluminium foil for heat exchanger as described in the claim 6, it is characterized in that: described hot rolling makes the slab of thickness between 5.0-7.0mm, gets the aluminium foil of thickness 0.080～0.12mm again through cold rolling.
8, a kind of manufacture method as aluminium foil for heat exchanger as described in one of claim 1-5, it comprises the steps: the material of deployed component is carried out melting, casting, cold rolling, anneal, it is characterized in that:
Described smelting temperature is controlled at 745-765 ℃;
In the described casting step, control the interior melt temperature of the preceding case of casting at 690-710 ℃, roll casting speed 900-1200mm/min;
The thermal treatment temp of described anneal step is controlled at 260～290 ℃, 5-30 hour metal heat preservation time.
9, as the manufacture method of aluminium foil for heat exchanger as described in the claim 8, it is characterized in that: described casting makes the slab of thickness between 5.0-7.0mm at last, gets the aluminium foil of thickness 0.080～0.12mm again through cold rolling.
10, as the manufacture method of aluminium foil for heat exchanger as described in claim 6 or 8, it is characterized in that: described cold rolling road number of times is 5-7.
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| CNB2007100755228A CN100500904C (en) | 2007-08-03 | 2007-08-03 | Aluminum foil used for heat exchanger and manufacturing method thereof |
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| CNB2007100755228A CN100500904C (en) | 2007-08-03 | 2007-08-03 | Aluminum foil used for heat exchanger and manufacturing method thereof |
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| JP5830451B2 (en) * | 2012-10-03 | 2015-12-09 | 株式会社神戸製鋼所 | Aluminum alloy fin material for heat exchanger for combination press |
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| CN111500900A (en) * | 2020-05-12 | 2020-08-07 | 江苏大亚铝业有限公司 | Solid packaging aluminum foil and production process thereof |
| CN112605147B (en) * | 2020-11-27 | 2023-03-31 | 江苏鼎胜新能源材料股份有限公司 | High-corrosion-resistance and low-potential fin aluminum foil for heat exchanger and manufacturing method thereof |
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Address after: Guangdong city of Shaoguan province Ruyuan 512721 Dragon Bay County Patentee after: Ruyuan East Sunshine Ai Xijie fine foil Co., Ltd. Address before: Guangdong city of Shaoguan province Ruyuan 512721 Dragon Bay County Patentee before: Dongyang Guangjing Foil Co., Ltd., Ruyuan |
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