CN100572577C - Aluminum alloy for air conditioner tube and manufacture method thereof - Google Patents
Aluminum alloy for air conditioner tube and manufacture method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of aluminium alloy and manufacture method thereof, refer in particular to a kind of aluminum alloy for air conditioner tube and manufacture method thereof.The present invention mainly is not good at existing in prior technology irony air-conditioning pipe performance, and problems such as copper air-conditioning pipe selling at exorbitant prices provide a kind of aluminum alloy for air conditioner tube and manufacture method thereof with excellent corrosion resistance energy, high-tensile, high-elongation.The proportioning of each composition of the present invention is: 0.7wt%～0.9wt%Mn, 0.1wt%～0.4wt%Si, 0.2wt%～0.7wt%Fe, 0.05wt%～0.6wt%Mg, Zn≤0.2wt%, 0.05wt%～0.25wt%Cu, Ti≤0.2wt%, 0.01wt%～0.2wt%Sc, 0.01wt%～0.1wt%Zr, 0.05wt%～0.2wt%RE, surplus is Al.
Description
Technical field
The present invention relates to a kind of aluminium alloy and manufacture method thereof, refer in particular to a kind of aluminum alloy for air conditioner tube and manufacture method thereof.
Background technology
At present, the material of air-conditioning heat exchanging pipe mostly is iron alloy or copper alloy greatly, but the iron pipe performance is not good at present, and the copper pipe price is higher.
As a kind of China Patent No. is the copper alloy for conditioner pipe of CN200510060388.5, it includes copper (Cu), phosphorus (P), norium (Re) based on lanthanum (La), cerium lightweight rare earth elements such as (Ce), the composition of each component is respectively by weight percentage: copper (Cu) 99.9%, phosphorus (P) 0.001～0.099% is based on the norium (Re) 0.001～0.099% of lanthanum (La), cerium lightweight rare earth elements such as (Ce).Phosphorus is preferably 0.015～0.040% and 0.004～0.012%.
A kind of for another example China Patent No. is the Ultrathin alloy tube and its manufacturing method of CN200710074946.2, ultrathin alloy material is in quality %, contains Cr17～23, Ti0.1～0.35, Cu0.4～8.5, Mo0.2～2.4, Co0.01～0.06, Ni0.3～2.0, Nb0.2～1.0, V0.05～0.4, B0.001～0.020, Si＜1.0, Mn＜1.0, C＜0.020, N＜0.020, P＜0.035, S＜0.025, Mg＜0.005, O＜0.006, Al＜0.08, remainder and is made of Fe and impurity.
Though the application of steel in refrigerator, refrigerator obtained human consumer's extensive approval, just has been subjected to restriction with the steel Alloy instead of Copper in air-conditioning.Air-conditioning and refrigerator, refrigerator have basic difference, and the space layout of refrigerator, refrigerator provides for the structure design of steel product may.Air-conditioning just can not satisfy this requirement, at first reaches identical refrigeration, and the air-conditioning volume is the smaller the better, so must select heat exchanger effectiveness to be better than or could substitute with the approaching material of copper, the heat exchange effect of steel is compared with copper and had a long way to go.Secondly the Working environment of air-conditioning is more abominable than refrigerator, refrigerator, and the requirement for anticorrosion of refrigeration pipe system is higher than refrigerator, refrigerator, and the anticorrosion difficulty of steel is big, complex procedures, cost height.
For reducing cost and improving performance, if use aluminium matter air-conditioning pipe replaces copper or irony air-conditioning pipe can solve an above difficult problem simultaneously.
Summary of the invention
The present invention mainly is not good at existing in prior technology irony air-conditioning pipe performance, and problems such as copper air-conditioning pipe selling at exorbitant prices provide a kind of aluminum alloy for air conditioner tube and manufacture method thereof with excellent corrosion resistance energy, high-tensile, high-elongation.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: aluminum alloy for air conditioner tube, and its composition is: Al, Mn, Si, Fe, Mg, Zn, Cu, Ti, Sc, Zr and rare earth element; The proportioning of its each composition is: 0.7wt%～0.9wt%Mn, 0.1wt%～0.4wt%Si, 0.2wt%～0.7wt%Fe, 0.05wt%～0.6wt%Mg, Zn≤0.2wt%, 0.05wt%～0.25wt%Cu, Ti≤0.2wt%, 0.01wt%～0.2wt%Sc, 0.01wt%～0.1wt%Zr, 0.05wt%～0.2wt%RE, surplus is Al, wherein RE is a mixed rare-earth elements.
In above-mentioned aluminum alloy for air conditioner tube, as preferably, described RE is the La-80%Ce mixed rare-earth elements.
The manufacture method of aluminum alloy for air conditioner tube, select virgin aluminium ingot, pure magnesium ingot, pure zinc ingot, Al-10%Mn, Al-20%Fe, Al-40%Cu, Al-4%Zr, Al-10%Sr, Al-10%Ti, Al-5%Ti-1%B, the Al-RE master alloy, RE is the La-80%Ce mixed rare-earth elements, mix by above-described composition proportion, by melting, refining, casting, advance to roll, the step of finish to gauge is made, smelting temperature is 720 ℃～760 ℃, refining temperature is 700 ℃～730 ℃, pouring temperature is 690 ℃～720 ℃, advance to roll 480 ℃～520 ℃ of temperature, 280 ℃～320 ℃ of finishing temperatures.
Alloy element action: the maxima solubility of manganese in sosoloid is 1.82%, and the intensity of alloy improves with the increase of Mn content, and when manganese content was 0.8% left and right sides, unit elongation reached maximum value; Mn and Al can generate MnAl
6Phase, when Mn content was higher than 1.6%, the intensity of alloy improved thereupon, but owing to formed a large amount of frangible compounds MnAl
6, easy to crack during alloy deformation.MnAl
6Another effect be can dissolved impurity iron, form (Fe, Mn) Al
6, reduce the harmful effect of iron.
After adding micro-Sc, Zr element simultaneously, will form Al
3(lattice types of this phase and lattice parameter and base aluminum are very approaching for Sc, Zr) phase, and this phase distribution of particles is even, and fusing point is very high, and thermostability is fabulous.It is not only preferentially separated out when alloy melt solidifies, and plays the effect crystal grain thinning tissue of heterogeneous body forming core core, more is of value to the structural stability, welding property and the etch resistant properties that improve in the alloy molding process.
Add an amount of rare earth element in this aluminium alloy, the flowability of melt in the time of can improving founding, and because rare earth element and hydrogen have extremely strong avidity, generate the high compound of fusing point with hydrogen, the effect of certain dehydrogenation, refining, purification is arranged, can significantly improve intensity and plasticity, the especially plasticity of aluminium alloy.In addition, the atomic radius of rare earth element is big, electronegativity is big and avidity is strong, can increase compound quantity in the alloy, as heterogeneous forming core point, plays the effect of thinning microstructure.
Therefore, the present invention has the following advantages:
The aluminum pipe of manufacturing of the present invention has excellent corrosion resistance energy, high temperature stability performance, good welding property, high-tensile, high-yield strength, high-elongation; Cost is cheaper than copper pipe, and performance is applicable to the production of tubing such as air conditioner connecting pipe, heat exchanger than iron pipe height, is the important materials that instead of null is called iron pipe, copper pipe.
Embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment 1:
Raw material is: virgin aluminium ingot, pure magnesium ingot, pure zinc ingot, Al-10%Mn, Al-20%Fe, Al-40%Cu, Al-4%Zr, Al-10%Sr, Al-10%Ti, Al-5%Ti-1%B, Al-RE master alloy, RE element are the La-80%Ce mixed rare-earth elements.
Select several in the raw alloy, according to the proportioning of each element in the table 1, by melting, refining, cast, advance to roll, the universal method of aluminium alloy manufacturing such as finish to gauge makes aluminium alloy.
Smelting temperature is 720 ℃～730 ℃, and refining temperature is 700 ℃～710 ℃, and pouring temperature is 690 ℃～700 ℃, advances to roll 480 ℃～490 ℃ of temperature, 280 ℃～290 ℃ of finishing temperatures.
Embodiment 2:
Raw material is: virgin aluminium ingot, pure magnesium ingot, pure zinc ingot, Al-10%Mn, Al-20%Fe, Al-40%Cu, Al-4%Zr, Al-10%Sr, Al-10%Ti, Al-5%Ti-1%B, Al-RE master alloy, RE element are the La-80%Ce mixed rare-earth elements.
Select several in the raw alloy, according to the proportioning of each element in the table 1, by melting, refining, cast, advance to roll, the universal method of aluminium alloy manufacturing such as finish to gauge makes aluminium alloy.
Smelting temperature is 720 ℃, and refining temperature is 700 ℃, and pouring temperature is 690 ℃, advances to roll 480 ℃ of temperature, 280 ℃ of finishing temperatures.
Embodiment 3:
Raw material is: virgin aluminium ingot, pure magnesium ingot, pure zinc ingot, Al-10%Mn, Al-20%Fe, Al-40%Cu, Al-4%Zr, Al-10%Sr, Al-10%Ti, Al-5%Ti-1%B, Al-RE master alloy, RE element are the La-80%Ce mixed rare-earth elements.
Select several in the raw alloy, according to the proportioning of each element in the table 1, by melting, refining, cast, advance to roll, the universal method of aluminium alloy manufacturing such as finish to gauge makes aluminium alloy.
Smelting temperature is 750 ℃～760 ℃, and refining temperature is 720 ℃～730 ℃, and pouring temperature is 710 ℃～720 ℃, advances to roll 510 ℃～520 ℃ of temperature, 310 ℃～320 ℃ of finishing temperatures.
Embodiment 4:
Raw material is: virgin aluminium ingot, pure magnesium ingot, pure zinc ingot, Al-10%Mn, Al-20%Fe, Al-40%Cu, Al-4%Zr, Al-10%Sr, Al-10%Ti, Al-5%Ti-1%B, Al-RE master alloy, RE element are the La-80%Ce mixed rare-earth elements.
Select several in the raw alloy, according to the proportioning of each element in the table 1, by melting, refining, cast, advance to roll, the universal method of aluminium alloy manufacturing such as finish to gauge makes aluminium alloy.
Smelting temperature is 730 ℃～740 ℃, and refining temperature is 720 ℃～730 ℃, and pouring temperature is 700 ℃～710 ℃, advances to roll 490 ℃～500 ℃ of temperature, 290 ℃～300 ℃ of finishing temperatures.
Embodiment 5:
Raw material is: virgin aluminium ingot, pure magnesium ingot, pure zinc ingot, Al-10%Mn, Al-20%Fe, Al-40%Cu, Al-4%Zr, Al-10%Sr, Al-10%Ti, Al-5%Ti-1%B, Al-RE master alloy, RE element are the La-80%Ce mixed rare-earth elements.
Select several in the raw alloy, according to the proportioning of each element in the table 1, by melting, refining, cast, advance to roll, the universal method of aluminium alloy manufacturing such as finish to gauge makes aluminium alloy.
Smelting temperature is 730 ℃～740 ℃, and refining temperature is 720 ℃～730 ℃, and pouring temperature is 700 ℃～710 ℃, advances to roll 490 ℃～500 ℃ of temperature, 290 ℃～300 ℃ of finishing temperatures.
Embodiment 6:
Raw material is: virgin aluminium ingot, pure magnesium ingot, pure zinc ingot, Al-10%Mn, Al-20%Fe, Al-40%Cu, Al-4%Zr, Al-10%Sr, Al-10%Ti, Al-5%Ti-1%B, Al-RE master alloy, RE element are the La-80%Ce mixed rare-earth elements.
Select several in the raw alloy, according to the proportioning of each element in the table 1, by melting, refining, cast, advance to roll, the universal method of aluminium alloy manufacturing such as finish to gauge makes aluminium alloy.
Smelting temperature is 760 ℃, and refining temperature is 730 ℃, and pouring temperature is 720 ℃, advances to roll 520 ℃ of temperature, 320 ℃ of finishing temperatures.
Table 1: the ratio (unit: wt%) of each alloy element component in the raw material
In the above form of presentation, as Al-10%Mn, for containing the Al alloy of Mn10wt%, all the other by that analogy.
The comparative example 1:
Because the heat exchange effect and the copper of aluminium are approaching, has advantages of good anticorrosion performance again, so aluminium is the direction that the insider studies for the research of copper always, along with deepening continuously to aluminium research, the various performances of aluminium have obtained very big improvement, and a lot of indexs have reached the standard of copper.The correlation technique parameter of copper, steel, aluminium is as shown in table 2.
The performance perameter of table 2 copper, steel, three kinds of metallic substance of aluminium
Be not difficult to find out that from table 2 aluminium is feasible as the equivalent material of copper, the incomparable advantage of steel is arranged, reason is as follows:
(1) outwardly, " copper take place of steel " seems to have more significantly price advantage from the material price.In fact because the proportion of aluminium has only about 1/3 of steel, and the two compares steel also a little more than aluminium to be processed into the required material cost of identical refrigeration system, if consider that tooling cost, the tooling cost of steel refrigeration system are higher than aluminium matter refrigeration system far away again;
(2) from heat exchange performance, take all factors into consideration the thermal conductivity and the specific heat capacity of aluminium and copper, the heat exchange performance of aluminium is higher than steel far away a little more than copper;
(3) from processing characteristics, because the fusing point of aluminium is low, its fusion process still be that course of hot rolling consumes energy all well below steel, and the machinability of aluminium is better than steel, and tooling cost is lower;
(4) from use properties, steel pipe etching problem in use is insoluble problem always, and especially internal surface is anticorrosion, and the corrosion resistance of aluminium is better than steel far away, just can obtain good antiseptic property by simple anode oxidation process;
(5) from the future development trend of air conditioning machinery, air-conditioning microminiaturized, good refrigeration effect is the research direction of following air-conditioning certainly, because the air-conditioning human consumer wishes that the air conditioning machinery occupation space is the smaller the better, off-premises station preferably can be cancelled, so not only can beautifying urban environment, and can eliminate safe hidden trouble.If temporarily can not be microminiaturized, can not enlarge the air-conditioning volume.The thermal conductivity of steel is compared with aluminium, copper with specific heat capacity and is differed greatly, if adopt steel pipe to replace copper pipe to revise significantly structure, increases heat exchange area, takies big quantity space.And the heat exchange effect of aluminium even slightly better than copper so do not need original structure is carried out very big change, does not need to take big quantity space yet;
(6) provide analysis from resource, domestic aluminium is in liberal supply, and import aluminium glides more than 70% on year-on-year basis, and the spot price of aluminium is from by the end of May 2800 dollars of/ton 2646.5 dollars/ton of falling to June 26.
In sum, copper product is alternative in air conditioner industry, and aluminium has incomparable advantage than steel, and China presses for the new aluminum of exploitation to solve increasingly serious " copper crisis ".
The comparative example 2:
Aluminum alloy for air conditioner tube of the present invention uses mainly as the starting material of all size aluminum pipe, is made into the aluminum pipe of all size by extruding.
Adopting embodiment 3 described aluminium alloys and preparation method thereof to make external diameter is the aluminium bar of 12mm, after tested, and its unit elongation 25%～35%, tensile strength 120MPa～130MPa, neutral salt spray test time 〉=1000h.
The comparative example 3:
Aluminum alloy for air conditioner tube of the present invention uses mainly as the starting material of all size aluminum pipe, is made into the aluminum pipe of all size by extruding.
Adopting embodiment 4 described aluminium alloys and preparation method thereof to make external diameter is the aluminium bar of 9.52mm, after tested, and its unit elongation 27%～35%, tensile strength 122MPa～135MPa, neutral salt spray test time 〉=1000h.
The comparative example 4:
Aluminum alloy for air conditioner tube of the present invention uses mainly as the starting material of all size aluminum pipe, is made into the aluminum pipe of all size by extruding.
Adopting embodiment 3 described aluminium alloys and preparation method thereof to make external diameter is the aluminium bar of 2.8mm, after tested, and its unit elongation 25%～29%, tensile strength 120MPa～125MPa, neutral salt spray test time 〉=1000h.
The comparative example 5:
Aluminum alloy for air conditioner tube of the present invention uses mainly as the starting material of all size aluminum pipe, is made into the aluminum pipe of all size by extruding.
Adopting embodiment 4 described aluminium alloys and preparation method thereof to make external diameter is the aluminium bar of 3.5mm, after tested, and its unit elongation 27%～31%, tensile strength 125MPa～130MPa, neutral salt spray test time 〉=1000h.
The comparative example 6:
Aluminum alloy for air conditioner tube of the present invention uses mainly as the starting material of all size aluminum pipe, is made into the aluminum pipe of all size by extruding.
Adopting embodiment 3 described aluminium alloys and preparation method thereof to make external diameter is the aluminium bar of 50mm, after tested, and its unit elongation 29%～39%, tensile strength 133MPa～142MPa, neutral salt spray test time 〉=1000h.
The comparative example 7:
Aluminum alloy for air conditioner tube of the present invention uses mainly as the starting material of all size aluminum pipe, is made into the aluminum pipe of all size by extruding.
Adopting embodiment 4 described aluminium alloys and preparation method thereof to make external diameter is the aluminium bar of 40mm, after tested, and its unit elongation 28%～39%, tensile strength 130MPa～140MPa, neutral salt spray test time 〉=1000h.
From embodiment 2～7 as can be seen, adopt unit elongation 〉=25% of the aluminum alloy for air conditioner tube of prescription of the present invention and material making, tensile strength 〉=120MPa, neutral salt spray test time 〉=1000h.
Above reduced parameter as can be seen, the aluminum alloy for air conditioner tube of manufacturing of the present invention is applicable to the production of tubing such as air conditioner connecting pipe, heat exchanger, is the important materials that instead of null is called copper pipe.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (3)
1. aluminum alloy for air conditioner tube, its composition is: Al, Mn, Si, Fe, Mg, Zn, Cu, Ti, Sc, Zr and rare earth element; The proportioning of its each composition is: 0.7wt%～0.9wt%Mn, 0.1wt%～0.4wt%Si, 0.2wt%～0.7wt%Fe, 0.05wt%～0.6wt%Mg, Zn≤0.2wt%, 0.05wt%～0.25wt%Cu, Ti≤0.2wt%, 0.01wt%～0.2wt%Sc, 0.01wt%～0.1wt%Zr, 0.05wt%～0.2wt%RE, surplus is Al, wherein RE is a mixed rare-earth elements.
2. aluminum alloy for air conditioner tube according to claim 1 is characterized in that described RE is the La-80%Ce mixed rare-earth elements.
3. the manufacture method of an aluminum alloy for air conditioner tube, select virgin aluminium ingot, pure magnesium ingot, pure zinc ingot, Al-10%Mn, Al-20%Fe, Al-40%Cu, Al-4%Zr, Al-10%Sr, Al-10%Ti, Al-5%Ti-1%B, the Al-RE master alloy is a raw material, RE is the La-80%Ce mixed rare-earth elements, mix according to the described composition proportion of claim 1, by melting, refining, casting, advance to roll, the step of finish to gauge is made, smelting temperature is 720 ℃～760 ℃, refining temperature is 700 ℃～730 ℃, pouring temperature is 690 ℃～720 ℃, advance to roll 480 ℃～520 ℃ of temperature, 280 ℃～320 ℃ of finishing temperatures.
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| CN102268574B (en) * | 2011-07-20 | 2013-05-08 | 安徽欣意电缆有限公司 | Aluminum alloy material for air-conditioning tube and manufacturing method thereof |
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| DE102015013540A1 (en) * | 2015-10-19 | 2017-04-20 | Trimet Aluminium Se | aluminum alloy |
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| CN107619970A (en) * | 2017-10-26 | 2018-01-23 | 江苏亚太安信达铝业有限公司 | Aluminium alloy for domestic air conditioning composite pipe and preparation method thereof |
| CN115710658B (en) * | 2023-01-09 | 2023-06-13 | 江苏常铝铝业集团股份有限公司 | Aluminum alloy with high thermal conductivity for air conditioner and manufacturing method thereof |
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Assignee: Jiangsu Kang Sheng Pipe Industry Co., Ltd. Assignor: Zhejiang Kangsheng Co., Ltd. Contract record no.: 2012320000237 Denomination of invention: Aluminum alloy for air conditioner tube and method for manufacturing same Granted publication date: 20091223 License type: Exclusive License Open date: 20080827 Record date: 20120315 |