CN102352457A - Preparation method of aluminium alloy strip for stamping and stretch forming of cell phone shell - Google Patents
Preparation method of aluminium alloy strip for stamping and stretch forming of cell phone shell Download PDFInfo
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- CN102352457A CN102352457A CN201110342282XA CN201110342282A CN102352457A CN 102352457 A CN102352457 A CN 102352457A CN 201110342282X A CN201110342282X A CN 201110342282XA CN 201110342282 A CN201110342282 A CN 201110342282A CN 102352457 A CN102352457 A CN 102352457A
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Abstract
The invention discloses a preparation method of an aluminium alloy strip for the stamping and stretch forming of a cell phone shell. The preparation method comprises the following steps of: smelting, pouring, homogenizing annealing, hot rolling and cold rolling. By optimizing the alloying components, formulating and optimizing the homogenizing annealing technology after pouring and accurately controlling the temperatures of hot rolling and cold rolling, the performances of the designed alloy can be fully realized, namely the comprehensive mechanical property of the aluminium alloy strip is excellent, the room temperature tensile strength is 285-320MPa, the elongation rate is more than 25% and the cupping test value is more than 10nm. Therefore, the aluminium alloy strip can fully meet the use demand of the stamping and stretch forming of the cell phone shell.
Description
Technical field
The present invention relates to field of aluminum alloys, particularly a kind of punching press drawing and forming phone housing is with the preparation method of aluminium alloy strips.
Background technology
At present; Along with growth in the living standard; People also rise to very high class to the demand of mobile phone; This just has higher requirement to corresponding cell phone appearance, and the product of conventional plastic matter shell more and more can not satisfy people's demand, and the mobile phone of metal shell has the intensive metal-like; Can bring beyond challenge visual impact sense; Have feel exquisiteness, wear-resisting, shatter-resistant, advantage such as anticorrosive simultaneously, extremely the human consumer praises highly, and represents the developing direction of high-end electronic product.
The used metallic substance of mobile phone of the metal shell that has adopted at present has magnesium alloy, aluminium alloy and stainless steel, wherein adopts the shell of aluminium alloy strips production to have attractive in appearance, light-weight characteristics.Since this shell to surface brightness, the oxidation of aluminum strip be coated with chromatic effect, deep drawability has high requirement.The shaping finished product rate that adopts the existing aluminium alloy trade mark to prepare phone housing generally has only 70～80%; Ubiquitous problem is that low, the surperficial visual appearance of good article rate is not good enough; Streamline vestige, spot, casting flaw such as loose appear in surface easily; Be difficult to guarantee the smooth specification of quality of phone housing any surface finish; And bring very big surface dressing work load; Seriously restrict the throughput of aluminium alloy enterprise, strengthened production cost.
Drawing is the rolled plate that a kind of production efficiency is high, directly use properties is good and have the very big market advantage and vast potential for future development.Drawing and forming is the most complicated in process for stamping and forming, and difficulty is also bigger.The part of many Application Areass adopts the impact briquetting technology must face the difficult problem of drawing and forming, and this difficult problem is also restricting the application of existing grade aluminium alloy on phone housing, for conventional punching production, traditional high-quality punching press strip need be provided more.This shows that punching press should possess higher punching performance with aluminium alloy strips.The product of prior art and method can not satisfy the demand of handset shell.
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 punching press drawing and forming phone housing with aluminium alloy strips.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
A kind of punching press drawing and forming phone housing is with the preparation method of aluminium alloy strips, and described aluminium alloy is made up of following component by weight percentage by weight percentage: 0.5%～0.8% Si, 0.05%～0.15% Fe, 0.03%～0.08% Mn, 1.5%～3.5% Mg, 0.01%～0.08% Ce, 0.2%～0.3% Ti and the Al of surplus form; Said preparation method comprises the steps:
(1) melting: the above-mentioned weight percent by element in the aluminium alloy strips takes by weighing aluminium silicon master alloy, ferro-aluminum master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium cerium master alloy, aluminium titanium master alloy and fine aluminium ingot respectively; Join in the gas-fired air furnace then; Under 760 ℃～780 ℃ conditions, be smelted into molten aluminium alloy; Molten aluminium alloy is changed in the resistance reverberatory furnace again; Change over to through degasification, after skimming and to leave standstill stove; Leave standstill 15min～30min, obtain melted molten aluminium alloy;
(2) cast: the molten aluminium alloy to 705 in the set-up procedure (1) ℃～715 ℃ through behind the ceramic filter, is cast as aluminium alloy cast ingot;
(3) homogenizing annealing: the aluminium alloy cast ingot that step (2) is made is placed in the annealing furnace, is heated to 595 ℃～605 ℃ and be incubated 8～10h with the temperature rise rate of 2 ℃～3 ℃/min, carries out homogenizing annealing and handles, and stove is as cold as room temperature;
(4) hot rolling: after earlier aluminium alloy cast ingot being heated to 530 ℃～550 ℃; Utilize hot rolls to carry out split rolling method; The adjustment rolling temperature is 490 ℃～510 ℃ to carry out 2～3 passages rolling after the cogging, and 465 ℃～475 ℃ of control finishing temperatures are the band of 4mm～5mm with aluminum alloy rolling to thickness;
(5) cold rolling: according to the finished product needs, cold rolling through multi-pass, the draft of controlling every time is 20～35%, adopts process annealing to handle between the passage, and aluminum alloy rolling is to 0.3mm～0.7mm the most at last.
In the above-mentioned component; The deep drawability that in aluminium alloy, adds an amount of Si, Fe, Mn element raising aluminum strip; Add the surface luster that an amount of Mg and Ti can improve aluminium alloy; Can improve the surface quality of aluminium alloy strips; Adding proper amount of rare-earth Elements C e helps improving the microtexture of aluminium alloy; Thereby help its pull and stretch punching performance and surface smoothness simultaneously; The joint synergy of these elements can make the comprehensive mechanical property of aluminium alloy excellent, satisfies the user demand of punching press drawing and forming phone housing.
In the aforesaid method,, adjusted the heterogeneous microstructure of alloy, thereby guaranteed that the finished product have good performance through temperature rise rate, annealing temperature and the soaking time that accurate selection and control intermediary homogenizing annealing are handled.
Punching press drawing and forming phone housing of the present invention uses the preparing method's of aluminium alloy strips beneficial effect to be:
(1) through the choose reasonable and the optimization design of alloy element, make each alloy element reach synergy, improved the surface quality of aluminium alloy strips, highly polished, earing rate is low, has significantly improved the pull and stretch punching performance of aluminium alloy.
(2) be directed against the alloying constituent that is designed; Formulation and optimization through the homogenizing annealing process after cast; And melting, hot rolling, the cold rolling processing parameter of routine adjusted; Particularly hot rolling and cold rolling temperature are accurately controlled; The performance of the feasible alloy that is designed is able to demonstrate fully: the comprehensive mechanical property of aluminium alloy strips of the present invention is excellent; Room temperature tensile strength 285-320MPa; Unit elongation is greater than 25%; Erichsen number can satisfy the user demand of punching press drawing and forming phone housing fully greater than 10nm.
(3) selected alloy element is conventional alloy element, and raw materials cost is cheap, and preparation technology is simple, and is easy to operate, applied widely.
Embodiment
Embodiment one
A kind of punching press drawing and forming phone housing is with the preparation method of aluminium alloy strips; Described aluminium alloy is made up of following component by weight percentage by weight percentage: 0.5% Si, 0.15% Fe, 0.03% Mn, 3.5% Mg, 0.01% Ce, 0.3% Ti and the Al of surplus form, and said preparation method comprises the steps:
(1) melting: the above-mentioned weight percent by element in the aluminium alloy strips takes by weighing aluminium silicon master alloy, ferro-aluminum master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium cerium master alloy, aluminium titanium master alloy and fine aluminium ingot respectively; Join in the gas-fired air furnace then; Under 760 ℃～780 ℃ conditions, be smelted into molten aluminium alloy; Molten aluminium alloy is changed in the resistance reverberatory furnace again; Change over to through degasification, after skimming and to leave standstill stove; Leave standstill 15min, obtain melted molten aluminium alloy;
(2) cast: the molten aluminium alloy to 705 in the set-up procedure (1) ℃～715 ℃ through behind the ceramic filter, is cast as aluminium alloy cast ingot;
(3) homogenizing annealing: the aluminium alloy cast ingot that step (2) is made is placed in the annealing furnace, is heated to 595 ℃ ℃ and be incubated 10h with the temperature rise rate of 2 ℃/min, carries out homogenizing annealing and handles, and stove is as cold as room temperature;
(4) hot rolling: after earlier aluminium alloy cast ingot being heated to 530 ℃; Utilize hot rolls to carry out split rolling method; The adjustment rolling temperature is 490 ℃～510 ℃ to carry out 2～3 passages rolling after the cogging, and 465 ℃～475 ℃ of control finishing temperatures are the band of 4mm with aluminum alloy rolling to thickness;
(5) cold rolling: according to the finished product needs, cold rolling through multi-pass, the draft of controlling every time is 20～35%, adopts process annealing to handle between the passage, and aluminum alloy rolling is to 0.30mm the most at last.
Embodiment two
A kind of punching press drawing and forming phone housing is with the preparation method of aluminium alloy strips, and described aluminium alloy is made up of following component by weight percentage by weight percentage: 0.8% Si, 0.05% Fe, 0.08% Mn, 1.5% Mg, 0.08% Ce, 0.2% Ti and the Al of surplus form; Said preparation method comprises the steps:
(1) melting: the above-mentioned weight percent by element in the aluminium alloy strips takes by weighing aluminium silicon master alloy, ferro-aluminum master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium cerium master alloy, aluminium titanium master alloy and fine aluminium ingot respectively; Join in the gas-fired air furnace then; Under 760 ℃～780 ℃ conditions, be smelted into molten aluminium alloy; Molten aluminium alloy is changed in the resistance reverberatory furnace again; Change over to through degasification, after skimming and to leave standstill stove; Leave standstill 30min, obtain melted molten aluminium alloy;
(2) cast: the molten aluminium alloy to 705 in the set-up procedure (1) ℃～715 ℃ through behind the ceramic filter, is cast as aluminium alloy cast ingot;
(3) homogenizing annealing: the aluminium alloy cast ingot that step (2) is made is placed in the annealing furnace, is heated to 605 ℃ and be incubated 8h with the temperature rise rate of 3 ℃/min, carries out homogenizing annealing and handles, and stove is as cold as room temperature;
(4) hot rolling: after earlier aluminium alloy cast ingot being heated to 550 ℃; Utilize hot rolls to carry out split rolling method; The adjustment rolling temperature is 490 ℃～510 ℃ to carry out 2～3 passages rolling after the cogging, and 465 ℃～475 ℃ of control finishing temperatures are the band of 5mm with aluminum alloy rolling to thickness;
(5) cold rolling: according to the finished product needs, cold rolling through multi-pass, the draft of controlling every time is 20～35%, adopts process annealing to handle between the passage, and aluminum alloy rolling is to 0.7mm the most at last.
Embodiment three
A kind of punching press drawing and forming phone housing is with the preparation method of aluminium alloy strips; Described aluminium alloy is made up of following component by weight percentage by weight percentage: 0.6% Si, 0.08% Fe, 0.05% Mn, 2.0% Mg, 0.03% Ce, 0.22% Ti and the Al of surplus form, and said preparation method comprises the steps:
(1) melting: the above-mentioned weight percent by element in the aluminium alloy strips takes by weighing aluminium silicon master alloy, ferro-aluminum master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium cerium master alloy, aluminium titanium master alloy and fine aluminium ingot respectively; Join in the gas-fired air furnace then; Under 760 ℃～780 ℃ conditions, be smelted into molten aluminium alloy; Molten aluminium alloy is changed in the resistance reverberatory furnace again; Change over to through degasification, after skimming and to leave standstill stove; Leave standstill 20min, obtain melted molten aluminium alloy;
(2) cast: the molten aluminium alloy to 705 in the set-up procedure (1) ℃～715 ℃ through behind the ceramic filter, is cast as aluminium alloy cast ingot;
(3) homogenizing annealing: the aluminium alloy cast ingot that step (2) is made is placed in the annealing furnace, is heated to 600 ℃ and be incubated 9h with the temperature rise rate of 2.5 ℃/min, carries out homogenizing annealing and handles, and stove is as cold as room temperature;
(4) hot rolling: after earlier aluminium alloy cast ingot being heated to 530 ℃～550 ℃; Utilize hot rolls to carry out split rolling method; The adjustment rolling temperature is 490 ℃～510 ℃ to carry out 2～3 passages rolling after the cogging, and 465 ℃～475 ℃ of control finishing temperatures are the band of 4.5mm with aluminum alloy rolling to thickness;
(5) cold rolling: according to the finished product needs, cold rolling through multi-pass, the draft of controlling every time is 20～35%, adopts process annealing to handle between the passage, and aluminum alloy rolling is to 0.5mm the most at last.
Embodiment four
A kind of punching press drawing and forming phone housing aluminium alloy strips, described aluminium alloy is made up of following component by weight percentage by weight percentage: 0.7% Si, 0.12% Fe, 0.06% Mn, 3.0% Mg, 0.05% Ce, 0.28% Ti and the Al of surplus form; Said preparation method comprises the steps:
(1) melting: the above-mentioned weight percent by element in the aluminium alloy strips takes by weighing aluminium silicon master alloy, ferro-aluminum master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium cerium master alloy, aluminium titanium master alloy and fine aluminium ingot respectively; Join in the gas-fired air furnace then; Under 760 ℃～780 ℃ conditions, be smelted into molten aluminium alloy; Molten aluminium alloy is changed in the resistance reverberatory furnace again; Change over to through degasification, after skimming and to leave standstill stove; Leave standstill 20min, obtain melted molten aluminium alloy;
(2) cast: the molten aluminium alloy to 705 in the set-up procedure (1) ℃～715 ℃ through behind the ceramic filter, is cast as aluminium alloy cast ingot;
(3) homogenizing annealing: the aluminium alloy cast ingot that step (2) is made is placed in the annealing furnace, is heated to 600 ℃ and be incubated 9h with the temperature rise rate of 2.5 ℃/min, carries out homogenizing annealing and handles, and stove is as cold as room temperature;
(4) hot rolling: after earlier aluminium alloy cast ingot being heated to 530 ℃～550 ℃; Utilize hot rolls to carry out split rolling method; The adjustment rolling temperature is 490 ℃～510 ℃ to carry out 2～3 passages rolling after the cogging, and 465 ℃～475 ℃ of control finishing temperatures are the band of 4.5mm with aluminum alloy rolling to thickness;
(5) cold rolling: according to the finished product needs, cold rolling through multi-pass, the draft of controlling every time is 20～35%, adopts process annealing to handle between the passage, and aluminum alloy rolling is to 0.5mm the most at last.
Embodiment five
A kind of punching press drawing and forming phone housing aluminium alloy strips, described aluminium alloy is made up of following component by weight percentage by weight percentage: 0.65% Si, 0.10% Fe, 0.05% Mn, 2.5% Mg, 0.04% Ce, 0.25% Ti and the Al of surplus form; Said preparation method comprises the steps:
(1) melting: the above-mentioned weight percent by element in the aluminium alloy strips takes by weighing aluminium silicon master alloy, ferro-aluminum master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium cerium master alloy, aluminium titanium master alloy and fine aluminium ingot respectively; Join in the gas-fired air furnace then; Under 760 ℃～780 ℃ conditions, be smelted into molten aluminium alloy; Molten aluminium alloy is changed in the resistance reverberatory furnace again; Change over to through degasification, after skimming and to leave standstill stove; Leave standstill 20min, obtain melted molten aluminium alloy;
(2) cast: the molten aluminium alloy to 705 in the set-up procedure (1) ℃～715 ℃ through behind the ceramic filter, is cast as aluminium alloy cast ingot;
(3) homogenizing annealing: the aluminium alloy cast ingot that step (2) is made is placed in the annealing furnace, is heated to 600 ℃ and be incubated 9h with the temperature rise rate of 2.5 ℃/min, carries out homogenizing annealing and handles, and stove is as cold as room temperature;
(4) hot rolling: after earlier aluminium alloy cast ingot being heated to 530 ℃～550 ℃; Utilize hot rolls to carry out split rolling method; The adjustment rolling temperature is 490 ℃～510 ℃ to carry out 2～3 passages rolling after the cogging, and 465 ℃～475 ℃ of control finishing temperatures are the band of 4.5mm with aluminum alloy rolling to thickness;
(5) cold rolling: according to the finished product needs, cold rolling through multi-pass, the draft of controlling every time is 20～35%, adopts process annealing to handle between the passage, and aluminum alloy rolling is to 0.5mm the most at last.
Applicant's statement; The present invention illustrates 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, to any improvement of the present invention, to the equivalence replacement of each raw material of product of the present invention and the interpolation of ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (3)
1. a punching press drawing and forming phone housing is with the preparation method of aluminium alloy strips; It is characterized in that described aluminium alloy is made up of following component by weight percentage by weight percentage: 0.5%～0.8% Si, 0.05%～0.15% Fe, 0.03%～0.08% Mn, 1.5%～3.5% Mg, 0.01%～0.08% Ce, 0.2%～0.3% Ti and the Al of surplus form; Said preparation method comprises the steps:
(1) melting: the above-mentioned weight percent by element in the aluminium alloy strips takes by weighing aluminium silicon master alloy, ferro-aluminum master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium cerium master alloy, aluminium titanium master alloy and fine aluminium ingot respectively; Join in the gas-fired air furnace then; Under 760 ℃～780 ℃ conditions, be smelted into molten aluminium alloy; Molten aluminium alloy is changed in the resistance reverberatory furnace again; Change over to through degasification, after skimming and to leave standstill stove; Leave standstill 15min～30min, obtain melted molten aluminium alloy;
(2) cast: the molten aluminium alloy to 705 in the set-up procedure (1) ℃～715 ℃ through behind the ceramic filter, is cast as aluminium alloy cast ingot;
(3) homogenizing annealing: the aluminium alloy cast ingot that step (2) is made is placed in the annealing furnace, is heated to 595 ℃～605 ℃ and be incubated 8～10h with the temperature rise rate of 2 ℃～3 ℃/min, carries out homogenizing annealing and handles, and stove is as cold as room temperature;
(4) hot rolling: after earlier aluminium alloy cast ingot being heated to 530 ℃～550 ℃; Utilize hot rolls to carry out split rolling method; The adjustment rolling temperature is 490 ℃～510 ℃ to carry out 2～3 passages rolling after the cogging, and 465 ℃～475 ℃ of control finishing temperatures are the band of 4mm～5mm with aluminum alloy rolling to thickness;
(5) cold rolling: according to the finished product needs, cold rolling through multi-pass, the draft of controlling every time is 20～35%, adopts process annealing to handle between the passage, and aluminum alloy rolling is to 0.3mm～0.7mm the most at last.
2. punching press drawing and forming phone housing as claimed in claim 1 is characterized in that with the preparation method of aluminium alloy strips, and wherein (3) step was heated to 600 ℃ and be incubated 8～9h with the temperature rise rate of 2.5 ℃/min, carried out homogenizing annealing and handled, and stove is as cold as room temperature.
3. punching press drawing and forming phone housing as claimed in claim 1 is with the preparation method of aluminium alloy strips; It is characterized in that wherein said aluminium alloy is made up of following component by weight percentage by weight percentage: 0.65% Si, 0.10% Fe, 0.05% Mn, 2.5% Mg, 0.04% Ce, 0.25% Ti and the Al of surplus form.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104342586A (en) * | 2013-07-24 | 2015-02-11 | 大力神铝业股份有限公司 | Multi-element micro-alloyed high-performance braze-welded aluminum alloy material for heat exchanger |
| CN105543574A (en) * | 2015-12-21 | 2016-05-04 | 无锡市世达精密焊管制造有限公司 | Aluminum alloy plate ingot rich in copper element and magnesium element and preparation method thereof |
| CN105925858A (en) * | 2016-06-12 | 2016-09-07 | 山东南山铝业股份有限公司 | Aluminum alloy sheet and production method thereof |
| CN106906389A (en) * | 2017-02-28 | 2017-06-30 | 广东润盛科技材料有限公司 | Almag aircraft housing and preparation method thereof |
| CN108754249A (en) * | 2018-05-11 | 2018-11-06 | 江苏常铝铝业股份有限公司 | A kind of battery aluminium alloy strips and preparation method thereof |
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| CN115637359A (en) * | 2022-11-03 | 2023-01-24 | 内蒙古工业大学 | Corrosion-resistant 5083 aluminum alloy and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104342586A (en) * | 2013-07-24 | 2015-02-11 | 大力神铝业股份有限公司 | Multi-element micro-alloyed high-performance braze-welded aluminum alloy material for heat exchanger |
| CN105543574A (en) * | 2015-12-21 | 2016-05-04 | 无锡市世达精密焊管制造有限公司 | Aluminum alloy plate ingot rich in copper element and magnesium element and preparation method thereof |
| CN105925858A (en) * | 2016-06-12 | 2016-09-07 | 山东南山铝业股份有限公司 | Aluminum alloy sheet and production method thereof |
| CN106906389A (en) * | 2017-02-28 | 2017-06-30 | 广东润盛科技材料有限公司 | Almag aircraft housing and preparation method thereof |
| CN108754249A (en) * | 2018-05-11 | 2018-11-06 | 江苏常铝铝业股份有限公司 | A kind of battery aluminium alloy strips and preparation method thereof |
| CN108838206A (en) * | 2018-06-07 | 2018-11-20 | 银邦金属复合材料股份有限公司 | Improve the method and al stainless steel composite board of al stainless steel composite board performance |
| CN108838206B (en) * | 2018-06-07 | 2020-02-07 | 银邦金属复合材料股份有限公司 | Method for improving performance of aluminum stainless steel composite board and aluminum stainless steel composite board |
| CN111317220A (en) * | 2019-12-27 | 2020-06-23 | 浙江伟星实业发展股份有限公司 | Aluminum alloy button and preparation method thereof |
| CN115637359A (en) * | 2022-11-03 | 2023-01-24 | 内蒙古工业大学 | Corrosion-resistant 5083 aluminum alloy and preparation method thereof |
| CN115637359B (en) * | 2022-11-03 | 2023-11-17 | 内蒙古工业大学 | Corrosion-resistant 5083 aluminum alloy and preparation method thereof |
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Application publication date: 20120215 |