CN102424926A - Preparation method of aluminium alloy for electric bicycle wheel rim - Google Patents
Preparation method of aluminium alloy for electric bicycle wheel rim Download PDFInfo
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- CN102424926A CN102424926A CN2011103668054A CN201110366805A CN102424926A CN 102424926 A CN102424926 A CN 102424926A CN 2011103668054 A CN2011103668054 A CN 2011103668054A CN 201110366805 A CN201110366805 A CN 201110366805A CN 102424926 A CN102424926 A CN 102424926A
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Abstract
The invention discloses a preparation method of aluminium alloy for an electric bicycle wheel rim. The aluminium alloy comprises components of, by weight: 1.5-2.5 parts of Si, 1.5-2.5 parts of Cu, 2.0-3.2 parts of Mg, 0.4-0.8 part of Zn, 0.2-0.6 part of Ti, 0.35-0.50 part of Zr and the balance of aluminium and inevitable impurities. The preparation method comprises steps of melting, refine, casting, homogenization treatment and extruding. Because of synergism of each alloying element, the aluminium alloy prepared by the invention has high strength, good elongation percentage, low natural ageing effect and good welding performance. After extruding, the aluminium alloy of the present invention has a tensile strength no less than 450 MPa, a yield no less than 400 MPa and an elongation percentage no less than 8%; besides, the aluminium alloy has good processing molding performance and can completely satisfy usage need of the electric bicycle.
Description
Technical field
The present invention relates to the electric bicycle field, particularly a kind of rim of electric bicycle is with the preparation method of duraluminum.
Background technology
Electric bicycle is because speed is fast than ordinary bicycle, uses more flexibly than automobile, and it is wider to adapt to road, therefore, has become a kind of important vehicles of people's trip.At present, the electronic owning amount voluntarily of China is very big, and people also improve each item performance of electric bicycle, and wherein important improvement relates to further and cutting down the consumption of energy, and improves the actual service life of single charge.The more improvement that relates to rechargeable battery in these researchs.
And another important aspect, can be from the material of car body, alleviating car body weight also can save energy, thereby improves the actual service life of single charge.The agent structure of conventional electric bike is seldom used aluminum alloy materials, but along with the continuous evolution of technical progress and complete processing is ripe, duraluminum is used by more producer as a kind of equivalent material gradually.With regard to wheel rim, prior art has that to select 7XXX for use be the report of alloy.
Yet, because the 7XXX material is because solidus curve is lower, so the extruding quenching temperature is low; For follow-up processing; The control temperature out will be lower than quenching temperature in extrusion process, otherwise can be owing to the high alloy content of 7XXX alloy, and material seasoning is rapidly strengthened; Must generally in 1-2 days, accomplish aluminium wheel rim bending, punching pcketing processing in the extremely short time.In case surpass this timing node, just must carry out to continue processing after the solution heat treatment.If not carrying out solution heat treatment processes, in the punching pcketing course of processing,,, also can cause the surface to produce orange peel phenomenon owing to the reduction of plasticity even cracking do not occur because plasticity can produce cracking phenomena inadequately, have a strong impact on attractive in appearance.The cost rising will inevitably appear in solid solution, production efficiency is low if carry out again, and the disappearance owing to extrusion effect after the solid solution simultaneously can cause degradation.
If the extruding temperature out is lower than the quenching point temperature, make material fully not quench, just mean and will reduce the extruded bars temperature that cause squeeze pressure to increase severely, extrusion speed sharply descends, efficient reduces, and damages container and extrusion mould simultaneously easily.And, make it in its follow-up course of processing, must carry out solid solution competence exertion alloy property owing in extrusion process, do not obtain best quenching temperature.
In sum, by existing aluminum alloy materials, no matter adopt which kind of technology, it is low all inevitably to face production efficiency, can not give full play to material property simultaneously.
Summary of the invention
To the deficiency of prior art, one of the object of the invention is to provide the preparation method of a kind of rim of electric bicycle with duraluminum.Aluminium alloy rim intensity through this method preparation is high, unit elongation is good, welding property is good.
To achieve these goals, the technical scheme of the present invention's employing is following:
A kind of rim of electric bicycle is with the preparation method of duraluminum, and said duraluminum is made up of following component by weight percentage: Si 1.5～2.5; Cu 1.5～2.5; Mg 2.0～3.2; Zn 0.4～0.8; Ti 0.2～0.6; Zr 0.35～0.50; Surplus is aluminium and unavoidable impurities; Described preparation method comprises following step:
(1) melting: get aluminium silicon master alloy, aluminum bronze master alloy, aluminium zinc master alloy, aluminium titanium master alloy and aluminium zirconium hardener, in aforementioned component ratio batching shove charge melting, temperature is 770～780 ℃, and the time is 4h～4.5h; In stove, add magnesium ingot by the set of dispense ratio then, and stir, continue melting, the time is 20min, skims;
(2) refining: furnace temperature is adjusted to 710～715 ℃ of refining temperatures, adds conventional refining agent refining 20～25min, skim;
(3) casting: adopt online hello the silk refinement of aluminium titanium boron wire, teeming temperature is 680～690 ℃, and casting rate is 75～90mm/min, obtains ingot casting;
(4) homogenizing is handled: temperature is 430～450 ℃, and soaking time is 12～15h;
(5) extruding: aluminium alloy cast ingot is heated to 420～430 ℃, and extrusion mould is heated to 380～400 ℃, smears extruding oil, pushes.
Beneficial effect of the present invention is:
1) the present invention is directed to the characteristics precise design of electric bicycle and the composition of control duraluminum, each alloy element synergy of duraluminum makes it have very high intensity, good unit elongation, low seasoning effect, good welding performance.
2) be directed against the alloying constituent that is designed, conventional smelting and pouring method parameter is optimized adjustment, thereby guaranteed the abundant realization of the alloy property that designs.Of the present invention aluminium alloy extruded after, tensile strength >=450MPa, surrender >=400MPa, unit elongation >=8%; And machine-shaping property is good, satisfies the use needs of electric bicycle fully.
Embodiment
Embodiment one
A kind of rim of electric bicycle is with the preparation method of duraluminum, and said duraluminum is made up of following component by weight percentage: Si 1.5; Cu 2.5; Mg 2.0; Zn 0.8; Ti 0.2; Zr 0.50; Surplus is aluminium and unavoidable impurities; Described preparation method comprises following step:
(1) melting: get aluminium silicon master alloy, aluminum bronze master alloy, aluminium zinc master alloy, aluminium titanium master alloy and aluminium zirconium hardener, in aforementioned component ratio batching shove charge melting, temperature is 770 ℃, and the time is 4.5h; In stove, add magnesium ingot by the set of dispense ratio then, and stir, continue melting, the time is 20min, skims;
(2) refining: furnace temperature is adjusted to 710 ℃ of refining temperatures, adds conventional refining agent refining 25min, skim;
(3) casting: adopt online hello the silk refinement of aluminium titanium boron wire, teeming temperature is 680 ℃, and casting rate is 90mm/min, obtains ingot casting;
(4) homogenizing is handled: temperature is 430 ℃, and soaking time is 15h;
(5) extruding: aluminium alloy cast ingot is heated to 420 ℃, and extrusion mould is heated to 400 ℃, smears extruding oil, pushes.
Embodiment two
A kind of rim of electric bicycle is with the preparation method of duraluminum, and said duraluminum is made up of following component by weight percentage: Si 2.5; Cu 1.5; Mg 3.2; Zn 0.4; Ti 0.6; Zr 0.35; Surplus is aluminium and unavoidable impurities; Described preparation method comprises following step:
(1) melting: get aluminium silicon master alloy, aluminum bronze master alloy, aluminium zinc master alloy, aluminium titanium master alloy and aluminium zirconium hardener, in aforementioned component ratio batching shove charge melting, temperature is 780 ℃, and the time is 4h; In stove, add magnesium ingot by the set of dispense ratio then, and stir, continue melting, the time is 20min, skims;
(2) refining: furnace temperature is adjusted to 715 ℃ of refining temperatures, adds conventional refining agent refining 20min, skim;
(3) casting: adopt online hello the silk refinement of aluminium titanium boron wire, teeming temperature is 690 ℃, and casting rate is 75mm/min, obtains ingot casting;
(4) homogenizing is handled: temperature is 450 ℃, and soaking time is 12h;
(5) extruding: aluminium alloy cast ingot is heated to 430 ℃, and extrusion mould is heated to 380 ℃, smears extruding oil, pushes.
Embodiment three
A kind of rim of electric bicycle is with the preparation method of duraluminum, and said duraluminum is made up of following component by weight percentage: Si 2.0; Cu 2.0; Mg 2.6; Zn 0.6; Ti 0.4; Zr 0.42; Surplus is aluminium and unavoidable impurities; Described preparation method comprises following step:
(1) melting: get aluminium silicon master alloy, aluminum bronze master alloy, aluminium zinc master alloy, aluminium titanium master alloy and aluminium zirconium hardener, in aforementioned component ratio batching shove charge melting, temperature is 775 ℃, and the time is 4.5h; In stove, add magnesium ingot by the set of dispense ratio then, and stir, continue melting, the time is 20min, skims;
(2) refining: furnace temperature is adjusted to 712 ℃ of refining temperatures, adds conventional refining agent refining 22min, skim;
(3) casting: adopt online hello the silk refinement of aluminium titanium boron wire, teeming temperature is 685 ℃, and casting rate is 85mm/min, obtains ingot casting;
(4) homogenizing is handled: temperature is 440 ℃, and soaking time is 13.5h;
(5) extruding: aluminium alloy cast ingot is heated to 425 ℃, and extrusion mould is heated to 390 ℃, smears extruding oil, pushes.
Applicant's statement; The present invention explains detailed process equipment of the present invention and technical process through the foregoing description; But the present invention is not limited to above-mentioned detailed process equipment and technical process, does not mean that promptly the present invention must rely on above-mentioned detailed process equipment and technical process could be implemented.The person of ordinary skill in the field should understand, and to any improvement of the present invention, to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (1)
1. a rim of electric bicycle is with the preparation method of duraluminum, and it is characterized in that said duraluminum is made up of following component by weight percentage: Si 1.5～2.5; Cu 1.5～2.5; Mg 2.0～3.2; Zn 0.4～0.8; Ti 0.2～0.6; Zr 0.35～0.50; Surplus is aluminium and unavoidable impurities; Described preparation method comprises following step:
(1) melting: get aluminium silicon master alloy, aluminum bronze master alloy, aluminium zinc master alloy, aluminium titanium master alloy and aluminium zirconium hardener, in aforementioned component ratio batching shove charge melting, temperature is 770～780 ℃, and the time is 4h～4.5h; In stove, add magnesium ingot by the set of dispense ratio then, and stir, continue melting, the time is 20min, skims;
(2) refining: furnace temperature is adjusted to 710～715 ℃ of refining temperatures, adds conventional refining agent refining 20～25min, skim;
(3) casting: adopt online hello the silk refinement of aluminium titanium boron wire, teeming temperature is 680～690 ℃, and casting rate is 75～90mm/min, obtains ingot casting;
(4) homogenizing is handled: temperature is 430～450 ℃, and soaking time is 12～15h;
(5) extruding: aluminium alloy cast ingot is heated to 420～430 ℃, and extrusion mould is heated to 380～400 ℃, smears extruding oil, pushes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110366805.4A CN102424926B (en) | 2011-11-17 | 2011-11-17 | A kind of preparation method of aluminium alloy for electric bicycle wheel rim |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110366805.4A CN102424926B (en) | 2011-11-17 | 2011-11-17 | A kind of preparation method of aluminium alloy for electric bicycle wheel rim |
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| CN102424926A true CN102424926A (en) | 2012-04-25 |
| CN102424926B CN102424926B (en) | 2016-05-18 |
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| CN201110366805.4A Active CN102424926B (en) | 2011-11-17 | 2011-11-17 | A kind of preparation method of aluminium alloy for electric bicycle wheel rim |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107022705A (en) * | 2017-04-27 | 2017-08-08 | 马鞍山常裕机械设备有限公司 | A kind of aluminium alloy castings and its casting method for automobile board |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0633178A (en) * | 1992-07-15 | 1994-02-08 | Furukawa Alum Co Ltd | Aluminum alloy sheet material for wheel rim excellent in formability and strength |
| US20060027291A1 (en) * | 2001-07-25 | 2006-02-09 | Showa Denko K.K. | Aluminum alloy excellent in cutting ability, aluminum alloy materials and manufacturing method thereof |
| JP2010255015A (en) * | 2009-04-21 | 2010-11-11 | Sumitomo Light Metal Ind Ltd | Clad material for welded tube of heat exchanger made from aluminum alloy, and method for manufacturing the same |
| CN101935790A (en) * | 2010-10-19 | 2011-01-05 | 上海友升铝业有限公司 | High-strength aluminum alloy material applicable to motorcycle rim |
| CN101935787A (en) * | 2010-10-19 | 2011-01-05 | 上海友升铝业有限公司 | Aluminum alloy material with high elongation rate |
-
2011
- 2011-11-17 CN CN201110366805.4A patent/CN102424926B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0633178A (en) * | 1992-07-15 | 1994-02-08 | Furukawa Alum Co Ltd | Aluminum alloy sheet material for wheel rim excellent in formability and strength |
| US20060027291A1 (en) * | 2001-07-25 | 2006-02-09 | Showa Denko K.K. | Aluminum alloy excellent in cutting ability, aluminum alloy materials and manufacturing method thereof |
| JP2010255015A (en) * | 2009-04-21 | 2010-11-11 | Sumitomo Light Metal Ind Ltd | Clad material for welded tube of heat exchanger made from aluminum alloy, and method for manufacturing the same |
| CN101935790A (en) * | 2010-10-19 | 2011-01-05 | 上海友升铝业有限公司 | High-strength aluminum alloy material applicable to motorcycle rim |
| CN101935787A (en) * | 2010-10-19 | 2011-01-05 | 上海友升铝业有限公司 | Aluminum alloy material with high elongation rate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107022705A (en) * | 2017-04-27 | 2017-08-08 | 马鞍山常裕机械设备有限公司 | A kind of aluminium alloy castings and its casting method for automobile board |
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| CN102424926B (en) | 2016-05-18 |
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