CN101220430A - Aluminum alloy foil material for brazing type heat exchanger and production process - Google Patents
Aluminum alloy foil material for brazing type heat exchanger and production process Download PDFInfo
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Abstract
The invention relates to an aluminum alloy foil material used in a brazing heat exchanger and a manufacturing method of the materials; wherein, indicated by weight percentage, the components of the material comprise 0.50 to 1.00 of Si, less than or equal to 0.60 of Fe, 0.05 to 0.10 of Cu, 1.00 to 1.60 of Mn, less than or equal to 0.05 of Mg, 1.60 to 2.20 of Zn, 0.10 to 0.20 of Zr, 0.01 to 0.05 of Ti and unavoidable impurities and the allowance is Al; the materials are made through the manufacturing steps of melting, standing furnace refinement, grain refinement, online degassing, filtration, continuous cast rolling, cold rolling and finishing rolling. The aluminum alloy foil of the invention has the thinner thickness of 0.05mm; the tensile strength is more than 250N/mm<2>, which improves brazing property; at the same time, the aluminum alloy foil material used in a brazing heat exchanger and the manufacturing method thereof is simple in technique and saves the production cost by more than at least 50 percent compared with the method of hot rolling, and therefore, the aluminum alloy foil of the invention has better economic and social benefits.
Description
One, technical field: the present invention relates to a kind of aluminum alloy foil material, particularly relate to a kind of aluminum alloy foil material for brazing type heat exchanger and production method.
Two, background technology:
At present, employed alloy foil on the interchanger such as motorcar air conditioner, charge air cooler, warm-air drier and water tank mainly is 3003 or the 3A21 aluminium foil, and the former is made by raw materials such as silicon, iron, copper and manganese, and the latter is made by raw materials such as silicon, iron, copper, manganese and titaniums.Because these two kinds of aluminium foils do not have the anodic protection effect, can increase the spot corrosion of aluminium foil when soldering; On the other hand, 3003 and two kinds of trade mark aluminium foils of 3A21 in manganese content lower, the reduction of manganese content causes that solidus temperature reduces.Therefore, the solidus temperature of these two kinds of trade mark aluminium foils is all lower, is easy to generate the distortion and the situation of subsiding during soldering.Though can overcome distortion and subside by increasing thickness, increase the increase that thickness can bring user's production cost.All more than 0.15mm, the thickness of current aluminium foil just develops towards more and more thinner direction the aluminum foil thickness of above-mentioned two kinds of trades mark.Therefore, above-mentioned two kinds of trade mark aluminium foils oneself can not meet the need of market.
About the brazing heat exchanger alloy foil, China has issued the non-ferrous metal industry standard, i.e. " YS/T496-2005 brazing heat exchanger alloy foil ", three kinds of material marks in this standard, have been enumerated, i.e. 3003 alloys, 3003+1.0%Zn, 3003+1.5%Zn, its blank is a hot rolling blank all, adopts hot rolling, cold rolling method again during production, and technology is comparatively complicated.
Publication number is the application for a patent for invention of CN 101069941A, a kind of manufacture method of aluminium alloy composite material for brazing type heat transmission is disclosed, Milling Process is carried out on the matrix blank surface that this method is handled homogenizing, remove the oxide skin on surface, again Milling Process is carried out on coating layer blank surface, be heated to 500～520 ℃ then and carry out hot rolling, and with matrix and the place's seam of coating layer bonding surface, the butt welding zoarium carries out hot rolling, the work in-process that hot rolling is finished are sent into the aluminium sheet strip and foil cold-rolling mill and are carried out cold rollingly, and rolling back product thickness is 0.08～3mm.Adopt Milling Process, hot rolling, cold rolling method again during production, thickness is more than 0.08mm, and this matrix material is formed by two to three layers, and its production technique is comparatively complicated.
Three, summary of the invention:
The technical problem to be solved in the present invention: provide a kind of brazing heat exchanger with alloy foil and production method, this alloy foil intensity is higher, thickness is thinner, the better advantage of solderability.
Technical scheme of the present invention:
A kind of brazing heat exchanger alloy foil, represent with weight percent, contain Si 0.50～1.00, Fe≤0.60, Cu0.05～0.10, Mn1.00～1.60, Mg≤0.05, Zn 1.60～2.20, Zr 0.10～0.20, Ti 0.01～0.05 and unavoidable impurities in the composition, surplus is Al.
Described brazing heat exchanger alloy foil, wherein Si 0.60～0.90, Fe≤0.40, Cu0.07～0.09, Mn1.20～1.50, Mg≤0.04, Zn 1.80～2.10, Zr 0.15～0.20, Ti 0.02～0.04 and unavoidable impurities, surplus is Al.
A kind of brazing heat exchanger may further comprise the steps with the production method of alloy foil,
(1) furnace charge that will get ready according to the above ratio of melting joins in the flame reverberatory furnace, and fusing also heats up, and analyzes when temperature reaches 730～750 ℃ and adjusts composition, skims then, temperature adjustment, obtains aluminium alloy melt;
(2) leave standstill the stove refining with the aluminium alloy melt metaideophone to leaving standstill stove and refining, refining time is no less than 20min;
(3) the online adding al-ti-b refiner of grain refining carries out grain refining, and add-on is 0.1～0.25% of an aluminium alloy melt weight;
(4) online degasification aluminium alloy melt is through degasification tank refining degasification;
(5) the aluminum filtration alloy melt carries out filter cleaner through filter box with ceramic filter;
(6) continuous casting and rolling becomes 4～10mm strip with aluminium alloy melt by the casting and rolling machine casting, passes through the template adjustment, shears, batches, and shuts out cast-rolling stock;
(7) cold rolling the cast-rolling stock homogenizing is handled, be rolling to 1.2mm after the cooling, carry out process annealing, be rolled into the thick cold rolling blank of 0.28～0.36mm then;
Carry out process annealing when (8) the finish rolling cold rolling blank that 0.28～0.36mm is thick is rolled down to 0.09～0.125mm, be rolled into the finished product of 0.05mm at last.
Describedly leave standstill the stove refining and adopt high pure nitrogen and tetracol phenixin refining degasification, static furnace temperature is 740～750 ℃.
Described online degasification is to feed the tetracol phenixin that high pure nitrogen or argon gas carry to carry out dehydrogenation in degasification tank, makes in the aluminium alloy melt hydrogen richness less than 0.12ml/100g Al; The filtering accuracy of described ceramic filter is 30～40ppi; Described continuous casting and rolling speed is 600～750mm/min.
Described when cold rolling homogenizing to handle be to handle 20h down at 500～530 ℃; Process annealing is to handle 18h down for 340～360 ℃ at furnace gas temperature, handles 3h down for 340～380 ℃ in the material temperature then.Described finish rolling annealing is to handle 14h down for 340～360 ℃ at furnace gas temperature, handles 3h down for 340～360 ℃ in the material temperature then.
The positive beneficial effect that the present invention has:
(1) to be different from the non-ferrous metal industry standard be three kinds of materials in the YS/T496-2005 standard to the alloy foil that adopts continuous casting and rolling method production technique to produce, increased zr element, improved the content of silicon, zinc, copper simultaneously, thereby improved tensile strength (greater than 250N/mm
2), improve the corrosion of solderability, inhibition point.
(2) adopt continuous casting and rolling method production technique, can directly be rolled into 4.0～10.0mm heavy slab from aluminium alloy melt; Need mill face, heating through casting, equal fire, sawing with the hot rolling method, be rolled into the thick slab of 7.0mm again and compare, technology of the present invention is simplified greatly, and production cost reduces more than 50% at least, and this method more helps applying.
(3) alloy foil thinner thickness of the present invention can reach 0.05mm; And the Alloy Foil thickness that the hot rolling method is produced is more than 0.1mm, and matrix material alloy foil thickness is more than 0.08mm.Therefore, use alloy foil of the present invention cost-saved, have tangible economic and social benefit.
Four, embodiment:
Embodiment one, aluminum alloy foil material for brazing type heat exchanger and production method
1. product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.742 | 0.58 | 0.0552 | 1.34 | ＜0.05 | 1.82 | 0.143 | 0.0199 | Surplus |
2. production method:
(1) melting
Satisfactory aluminium ingot and waste material are joined in the flame reverberatory furnace, fully stir after the heat fused, when temperature reaches 730 ℃, carry out composition analysis, carry out the composition adjustment according to analytical results adding Si, Fe, Cu, Mn, Mg, Zn, Zr, Ti; Temperature is adjusted in the qualified back of composition, and the aluminium alloy melt tapping temperature is 760 ℃.
(2) leave standstill the stove refining
The aluminium alloy melt metaideophone to leaving standstill stove, is carried out the refining degasification with tetracol phenixin behind the employing nitrogen earlier after the neutralization of metaideophone process fills stove, refining time is not less than 20min.
(3) grain refining
Al-ti-b refiner is joined degasification tank aluminium liquid ingress by titanium silk feeding machine, and add-on is 0.2% of an aluminium alloy melt weight, and melt is carried out modifying-refining.
(4) online degasification
Aluminium alloy melt carries tetracol phenixin by high pure nitrogen and carries out dehydrogenation, hydrogen richness in the aluminium alloy melt: 0.112ml/100g Al through degasification tank.
(5) filter through filter box, adopting filtering accuracy is the ceramic filter filter cleaner of 40ppi.
(6) continuous casting and rolling
Flow to two by the casting and rolling machine lip and rotate in opposite directions and the inner casting roller that is connected with recirculated cooling water, in the casting district, realize casting, rolling deformation, the casting of liquid metal aluminium alloy melt is become the 8.3mm strip.At last through the adjustment of template, shear, batch and realize stablizing casting, shut out cast-rolling stock.
Main casting parameter is as follows: roll gap: 4.7mm, casting district: 60mm, preceding oven temperature, degree: 705 ℃, roll casting speed: 700mm/min, plate are wide: 1450mm, thickness of slab: 8.1mm.
(7) cold rolling
Cast-rolling stock at first carries out 500 ℃/24h homogenizing to be handled; After the cooling, be rolling to 1.2mm, carry out process annealing, 18h is handled in annealing when 360 ℃ (furnace gas temperature); Handle 3h down 360 ℃ (material temperature) then; Be rolled into the thick cold rolling blank of 0.28mm then.
(8) finish rolling
The cold rolling blank that 0.28mm is thick carries out process annealing when being rolled down to 0.09mm, annealing is handled 14h at 340 ℃ (furnace gas temperature), handles 3h 340 ℃ (material temperature) then, is rolled into the finished product of 0.05mm at last.
Embodiment two, aluminum alloy foil material for brazing type heat exchanger and production method
1. product composition
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.888 | 0.428 | 0.0827 | 1.5 | ＜0.05 | 1.85 | 0.141 | 0.0241 | Surplus |
2. production method:
(1) melting
To meet the requirements aluminium ingot and waste material joins in the flame reverberatory furnace, fully stirs after the heat fused, carries out composition analysis when temperature reaches 740 ℃, according to analytical results add Si, Fe, Cu, Mn, Mg, Zn, Zr, Ti carry out the composition adjustment; Temperature is adjusted in the qualified back of composition, and the aluminium alloy melt tapping temperature is 765 ℃.
(2) leave standstill the stove refining
The aluminium alloy melt metaideophone to leaving standstill stove, after filling stove, the neutralization of metaideophone process is carried out the refining degasification with tetracol phenixin, refining time 40min behind the employing nitrogen earlier.
(3) grain refining
Al-ti-b refiner is joined degasification tank aluminium liquid ingress by titanium silk feeding machine, and add-on is 0.15% of an aluminium alloy melt weight, and melt is carried out modifying-refining.
(4) online degasification is carried tetracol phenixin by argon gas and is carried out dehydrogenation, hydrogen richness in the aluminium alloy melt: 0.114ml/100g Al through degasification tank.
(5) filter through filter box, the employing filtering accuracy is that the ceramic filter of 35ppi carries out filter cleaner.
(6) continuous casting and rolling
Flow to two by the casting and rolling machine lip and rotate in opposite directions and the inner casting roller that is connected with recirculated cooling water, in the casting district, realize casting, rolling deformation, the casting of liquid aluminium alloy melt is become the 8.3mm strip.At last through the adjustment of template, shear, batch and realize stablizing casting, shut out cast-rolling stock.
Main casting parameter is as follows: roll gap: 4.7mm, casting district: 60mm, preceding oven temperature, degree: 700 ℃, roll casting speed: 630mm/min, plate are wide: 1470mm, thickness of slab: 8.3mm.
(7) cold rolling
Cast-rolling stock at first carries out 500 ℃/24h homogenizing to be handled; After the cooling, be rolling to 1.2mm, carry out process annealing, 18h is handled in annealing when 360 ℃ (furnace gas temperature); Handle 3h down 360 ℃ (material temperature) then; Be rolled into the thick cold rolling blank of 0.28mm then.
(8) finish rolling
The cold rolling blank that 0.28mm is thick carries out process annealing when being rolled down to 0.09mm, annealing is handled 14h at 340 ℃ (furnace gas temperature), handles 3h 340 ℃ (material temperature) then, is rolled into the finished product of 0.05mm at last.
Embodiment three, aluminum alloy foil material for brazing type heat exchanger and production method
1. product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.758 | 0.569 | 0.0592 | 1.28 | ＜0.05 | 1.82 | 0.165 | 0.0131 | Surplus |
2. production method:
(1) melting
To meet the requirements aluminium ingot and waste material joins in the flame reverberatory furnace, fully stirs after the heat fused, carries out composition analysis when temperature reaches 735 ℃, according to analytical results add Si, Fe, Cu, Mn, Mg, Zn, Zr, Ti carry out the composition adjustment; Temperature, 755 ℃ of aluminium alloy melt tapping temperatures are adjusted in the qualified back of composition.
(2) leave standstill the stove refining
The melt metaideophone to leaving standstill stove, after filling stove, the neutralization of metaideophone process is carried out the refining degasification with tetracol phenixin, refining time 30min behind the employing nitrogen earlier.
(3) grain refining
Al-ti-b refiner is joined degasification tank aluminium liquid ingress by titanium silk feeding machine, and add-on is 0.18% of an aluminium alloy melt weight, and melt is carried out modifying-refining.
(4) online degasification
Carry the tetracol phenixin dehydrogenation by high pure nitrogen, hydrogen richness in the aluminium alloy melt: 0.107ml/100gAl.
(5) filter the ceramic filter filtration that the employing filtering accuracy is 30ppi.
(6) continuous casting and rolling
Aluminium alloy melt flows to two by lip and rotates in opposite directions and the inner casting roller that is connected with recirculated cooling water, realizes casting, rolling deformation in the casting district, and the casting of liquid metal aluminium alloy melt is become the 8.1mm strip.At last through the adjustment of template, shear, batch and realize stablizing casting, shut out cast-rolling stock.
Main casting parameter is as follows: roll gap: 4.7mm, casting district: 58mm, preceding oven temperature, degree: 700 ℃, roll casting speed: 744mm/min, plate are wide: 1450mm, thickness of slab: 8.1mm.
(7) cold rolling
Cast-rolling stock at first carries out 500 ℃/24h homogenizing to be handled; After the cooling, be rolling to 1.2mm, carry out process annealing, 18h is handled in annealing when 360 ℃ (furnace gas temperature); Handle 3h down 360 ℃ (material temperature) then; Be rolled into the thick cold rolling blank of 0.28mm then.
(8) finish rolling
The cold rolling blank that 0.28mm is thick carries out process annealing when being rolled down to 0.09mm, annealing is handled 14h at 340 ℃ (furnace gas temperature), handles 3h 340 ℃ (material temperature) then, is rolled into the finished product of 0.05mm at last.
Embodiment four, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.511 | 0.512 | 0.0754 | 1.55 | 0.028 | 1.60 | 0.195 | 0.05 | Surplus |
Embodiment five, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.578 | 0.40 | 0.10 | 1.11 | 0.045 | 1.70 | 0.115 | 0.01 | Surplus |
Embodiment six, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.650 | 0.58 | 0.05 | 1.58 | 0.02 | 1.65 | 0.198 | 0.05 | Surplus |
Embodiment seven, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.875 | 0.55 | 0.0592 | 1.55 | 0.04 | 2.15 | 0.165 | 0.04 | Surplus |
Embodiment eight, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.60 | 0.40 | 0.07 | 120 | 0.04 | 2.1 | 0.15 | 0.04 | Surplus |
Embodiment nine, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.90 | 0.35 | 0.09 | 1.50 | 0.03 | 1.8 | 0.20 | 0.02 | Surplus |
Embodiment ten, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.625 | 0.30 | 0.09 | 1.48 | 0.03 | 1.85 | 0.175 | 0.025 | Surplus |
Embodiment 11, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.875 | 0.30 | 0.07 | 1.25 | 0.04 | 2.05 | 0.195 | 0.038 | Surplus |
Embodiment 12, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.758 | 0.335 | 0.0822 | 1.42 | 0.038 | 2.00 | 0.185 | 0.03 | Surplus |
Embodiment 13, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.775 | 0.40 | 0.0755 | 1.45 | 0.035 | 1.95 | 0.168 | 0.035 | Surplus |
Embodiment 14, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.85 | 0.15 | 0.08 | 1.25 | 0.01 | 2.05 | 0.19 | 0.03 | Surplus |
Embodiment 15, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.95 | 0 | 0.95 | 1.14 | 0.03 | 1.70 | 0.15 | 0.04 | Surplus |
Embodiment 16, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.85 | 0.55 | 0.06 | 1.45 | 0 | 1.85 | 0.12 | 0.03 | Surplus |
Embodiment 17, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.75 | 0 | 0.07 | 1.35 | 0 | 2.00 | 0.15 | 0.04 | Surplus |
Embodiment 18, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.55 | 0 | 0.08 | 1.25 | 0 | 2.05 | 0.19 | 0.03 | Surplus |
Embodiment 19, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.95 | 0 | 0.06 | 1.55 | 0 | 1.60 | 0.12 | 0.04 | Surplus |
Embodiment 20, production method no longer repeat with embodiment one, and difference is product composition:
| Si | Fe | Cu | Mn | Mg | Zn | Zr | Ti | Al |
| 0.55 | 0 | 0.09 | 1.30 | 0 | 1.80 | 0.16 | 0.05 | Surplus |
Claims (9)
1. brazing heat exchanger alloy foil, it is characterized in that: represent with weight percent, contain Si 0.50～1.00, Fe≤0.60, Cu0.05～0.10, Mn1.00～1.60, Mg≤0.05, Zn 1.60～2.20, Zr 0.10～0.20, Ti 0.01～0.05 and unavoidable impurities in the composition, surplus is Al.
2. brazing heat exchanger alloy foil according to claim 1, it is characterized in that: wherein Si0.60～0.90, Fe≤0.40, Cu0.07～0.09, Mn1.20～1.50, Mg≤0.04, Zn 1.80～2.10, Zr 0.15～0.20, Ti 0.02～0.04 and unavoidable impurities, surplus is Al.
3. a brazing heat exchanger is characterized in that with the production method of alloy foil: may further comprise the steps,
(1) melting furnace charge that the described ratio of claim 1 is got ready joins in the flame reverberatory furnace, and fusing also heats up, and analyzes when temperature reaches 730～750 ℃ and adjusts composition, skims then, temperature adjustment, obtains aluminium alloy melt;
(2) leave standstill the stove refining with the aluminium alloy melt metaideophone to leaving standstill stove and refining, refining time is no less than 20min;
(3) the online adding al-ti-b refiner of grain refining carries out grain refining, and add-on is 0.1～0.25% of an aluminium alloy melt weight;
(4) online degasification aluminium alloy melt is through degasification tank refining degasification;
(5) the aluminum filtration alloy melt carries out filter cleaner through filter box with ceramic filter;
(6) continuous casting and rolling becomes 4～10mm strip with aluminium alloy melt by the casting and rolling machine casting, passes through the template adjustment, shears, batches, and shuts out cast-rolling stock;
(7) cold rolling the cast-rolling stock homogenizing is handled, be rolling to 1.2mm after the cooling, carry out process annealing, be rolled into the thick cold rolling blank of 0.28～0.36mm then;
Carry out process annealing when (8) the finish rolling cold rolling blank that 0.28～0.36mm is thick is rolled down to 0.09～0.125mm, be rolled into the finished product of 0.05mm at last.
4. brazing heat exchanger according to claim 3 is characterized in that with the production method of alloy foil: describedly leave standstill the stove refining and adopt high pure nitrogen and tetracol phenixin refining degasification, static furnace temperature is 740～750 ℃.
5. the brazing heat exchanger according to claim 3 production method of alloy foil, it is characterized in that: described online degasification is to feed the tetracol phenixin that high pure nitrogen or argon gas carry to carry out dehydrogenation in degasification tank, makes in the aluminium alloy melt hydrogen richness less than 0.12ml/100gAl.
6. the brazing heat exchanger according to claim 3 production method of alloy foil, it is characterized in that: the filtering accuracy of described ceramic filter is 30～40ppi.
7. the brazing heat exchanger according to claim 3 production method of alloy foil, it is characterized in that: described continuous casting and rolling speed is 600～750mm/min.
8. brazing heat exchanger according to claim 3 is characterized in that with the production method of alloy foil: described when cold rolling homogenizing to handle be to handle 20h down at 500～530 ℃; Process annealing is to handle 18h down for 340～360 ℃ at furnace gas temperature, handles 3h down for 340～380 ℃ in the material temperature then.
9. the brazing heat exchanger according to claim 3 production method of alloy foil is characterized in that: described finish rolling annealing is to handle 14h down for 340～360 ℃ at furnace gas temperature, handles 3h down for warm 340～360 ℃ at material then.
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