CN102352456A - Preparation method of aluminium alloy thin strip for cell phone stamped shell - Google Patents
Preparation method of aluminium alloy thin strip for cell phone stamped shell Download PDFInfo
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- CN102352456A CN102352456A CN2011103419403A CN201110341940A CN102352456A CN 102352456 A CN102352456 A CN 102352456A CN 2011103419403 A CN2011103419403 A CN 2011103419403A CN 201110341940 A CN201110341940 A CN 201110341940A CN 102352456 A CN102352456 A CN 102352456A
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Abstract
The invention discloses a preparation method of an aluminium alloy thin strip for a cell phone stamped shell. The components of the common stamping aluminium alloy 5052 are adjusted, and the technological parameters of vertical twin-roll casting are adjusted according to the adjusted alloying components so that grains can be well refined and the alloy structure can be improved, thus the aluminium alloy thin strip prepared by the method disclosed by the invention has higher comprehensive mechanical property. By adopting the vertical twin-roll thin strip continuous casting technology to prepare an aluminium alloy thin strip blank through casting-rolling, the near-net-shape forming of the product can be realized and an aluminium alloy in the liquid state can be directly formed to obtain the thin strip blank. Therefore, the method has a short technological process and the production cost is only 40% of that of the product which adopts the traditional cast ingot and the hot rolling and cold rolling technologies. The thin strip prepared by the method can completely meet the requirement of subsequent stamping.
Description
Technical field
The present invention relates to the aluminium alloy manufacture field, particularly a kind of preparation method of aluminium alloy strip.
Background technology
Raising along with development of science and technology and people's living standard; Mobile phone has become indispensable now electronics technology product; Also because the lifting of science and technology; The mobile phone products kind is a feast for the eyes especially; And light-weighted gradually trend is arranged; And under the demand along with the continuous lightweight of product, except the internals of product own needs towards light and handy precision, the decrement of product casing is one of essential emphasis of breaking through of lightweight product especially.
The defective that the mobile phone products enclosure volume is big in order to improve, quality is heavy; Developed aluminium alloy at present as the main material of product casing; This is because aluminium alloy is a kind of light metal material; Be to use the widest nonferrous materials at present, have higher specific tenacity, specific rigidity and excellent machinability.
The aluminium alloy that adopts Sheet Metal Forming Technology to prepare phone housing can select 5052 for use, at first aluminium alloy need be prepared into the band that satisfies the finished product thickness requirement, adopts mould to carry out punching production then.
The technical process of traditional aluminum alloy thin band production is: melting → ingot casting → homogenizing → mill face → heating → hot rolling → cold rolling → finished products, and technical process is longer, and facility investment is big.
Another method of producing the aluminium alloy strip is to adopt the production of continuous casting and rolling cold-rolling process; In the prior art; Like CN1939610A and CN1995423A; The method that adopts horizontal twin-roll cast-rolling mill continuous casting aluminium alloy plate made-up belt has been arranged; Because the horizontal dual roll casting machine is aluminum alloy melt to be sent between the rotation casting roller of arranging up and down through lip; Therefore alloy liquid is shorter with the zone of action of casting roller, is generally 15～40mm; Liquid level is lower, is generally 20mm; Casting speed is slower, generally between 0.8～1.5m/min.Though this technology is controlled easily, and can simplify traditional aluminum alloy thin band technological process of production, realize nearly end form processing and preparing aluminium alloy plate made-up belt, have the inherent shortcoming: short zone of action makes the long cooling time of formation needs of solidified shell; Horizontal double roller therapy is stressed the rolling effect of casting roller, requires to have certain rolling reduction; The cooling performance of up-down rollers is inconsistent, and the configuration of surface of condensing zone upper and lower surface liquid film is inconsistent, causes Cast Strip upper and lower surface quality and interior tissue inhomogeneous.Therefore, production efficiency is low, and the speed of cooling of aluminum alloy thin belt blank is slower, and strip tissue odds is even, and use properties is not good, is unfavorable for directly carrying out follow-up rolling processing.
In addition in the prior art; Like CN101249606; Also disclose and adopted vertical twin-roll thin strip base casting-rolling technology; But this patent only is confined to the improvement of casting-rolling method; Still adopt the existing aluminium alloy trade mark; Though existing 5052 aluminium alloy punching performances are good, for complex-shaped phone housing product, its deep drawability and surface brightness still can not satisfy user demand.
Summary of the invention
Deficiency to prior art; One of the object of the invention is to provide the preparation method of a kind of punching press phone housing with the aluminium alloy strip; The inventive method is through adjusting the composition of 5052 aluminium alloys; And adjust the casting-rolling technology of vertical dual-roller conticaster of thin sheet billet and follow-up cold-rolling process to adjusted alloying constituent; Thereby prepare excellent performance, satisfy the aluminium alloy strip of punching press phone housing needs.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
A kind of punching press phone housing is with the preparation method of aluminium alloy strip; Wherein said aluminium alloy is made up of following component by weight percentage: Mg 2.1-2.4%; Fe 0.3-0.4%; Si 0.3-0.55%, Zn 0.05-0.15%, Mn 0.07-0.09%; Cu 0.015-0.025%; Ti 0.03-0.05%, surplus is Al and unavoidable impurities, described preparation method comprises the steps:
Melting: the master alloy that takes by weighing pure magnesium ingot, fine aluminium ingot and all the other each elements and aluminium according to above-mentioned component; In smelting furnace, melt, through deoxidation, degasification, skim, take a sample after the refining, after composition meets the demands; Left standstill 10-15 minute, the adjustment teeming temperature is 670-690 ℃ and prepares cast;
Casting: the side seal of casting roller both sides provided be preheated to 460-475 ℃; Adjustment casting roller gap gap is 0mm; Aluminium alloy melt after will leaving standstill then is poured into vertical double-roller continuous casting machine through submerged nozzle; Control is that 40-60mm starts two rod continuous casters then through melt flow; Adjust the roll gap gap then and carry out casting to 0.2-0.4mm; It is 75-85mm that the stable back of casting keeps melt pool height; The casting speed of casting machine is 10-15m/min during casting; The strip base gets into pinch roll after leaving the casting roller, and the aluminum alloy thin tape thickness that casts out is 1.5-2.5mm;
Continuous homogenizing annealing: through the continuous annealing furnace annealing, annealing temperature is controlled at 570-590 ℃ with the strip after the casting;
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 0.4mm-0.6mm the most at last.
Punching press phone housing of the present invention has following beneficial effect with the preparation method of aluminium alloy strip:
1. punching press aluminium alloy 5052 commonly used is carried out the composition adjustment; Increase the Si content that helps deep drawability; Suitably increase the content of Mn element; Omit the Cr element; Be added with the Ti element that is beneficial to surface smoothness simultaneously; Thereby the deep drawability of the aluminium alloy strip of preparation is significantly improved, and surface quality is excellent.
2. according to the alloying constituent of being adjusted, adjust vertical double-roller rolling processing parameter, make its well crystal grain thinning with improve alloy organizing.So the aluminium alloy strip comprehensive mechanical property that the inventive method obtains is higher.
3. adopt vertical twin-roll thin strip continuous casting explained hereafter aluminum alloy thin belt blank; Can improve the casting rate of aluminum alloy thin belt blank; Production efficiency is high; Realize the nearly end form shaping processing of product; Making aluminium alloy is the strip base by liquid direct forming; Therefore technical process is short, and cost is low, and its production cost only is 40% of traditional ingot casting, hot rolling, a cold-rolling process.
4. the adjustment of alloying constituent cooperates the adjustment of vertical pair of rod casting-rolling technology and optimization to make that the strip base surface quality that casts out is good, and internal organizational structure is even, satisfies follow-up punching press demand.
Embodiment
Embodiment one
A kind of punching press phone housing is with the preparation method of aluminium alloy strip; Wherein said aluminium alloy is made up of following component by weight percentage: Mg 2.1%; Fe 0.4%; Si 0.3%, and Zn 0.15%, and Mn 0.07%; Cu 0.025%; Ti 0.03%, and surplus is Al and unavoidable impurities, and described preparation method comprises the steps:
Melting: the master alloy that takes by weighing pure magnesium ingot, fine aluminium ingot and all the other each elements and aluminium according to above-mentioned component; In smelting furnace, melt, through deoxidation, degasification, skim, take a sample after the refining, after composition meets the demands; Left standstill 10 minutes, the adjustment teeming temperature is 690 ℃ and prepares cast;
Casting: the side seal of casting roller both sides provided be preheated to 460-475 ℃; Adjustment casting roller gap gap is 0mm; Aluminium alloy melt after will leaving standstill then is poured into vertical double-roller continuous casting machine through submerged nozzle; Control is that 40-60mm starts two rod continuous casters then through melt flow; Adjust the roll gap gap then and carry out casting to 0.4mm; It is 75-85mm that the stable back of casting keeps melt pool height; The casting speed of casting machine is 10m/min during casting; The strip base gets into pinch roll after leaving the casting roller, and the aluminum alloy thin tape thickness that casts out is 2.5mm;
Continuous homogenizing annealing: through the continuous annealing furnace annealing, annealing temperature is controlled at 570 ℃ with the strip after the casting;
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 0.6mm the most at last.
Embodiment two
A kind of punching press phone housing is with the preparation method of aluminium alloy strip; Wherein said aluminium alloy is made up of following component by weight percentage: Mg 2.4%; Fe 0.3%; Si 0.55%, and Zn 0.05%, and Mn 0.09%; Cu 0.015%; Ti 0.05%, and surplus is Al and unavoidable impurities, and described preparation method comprises the steps:
Melting: the master alloy that takes by weighing pure magnesium ingot, fine aluminium ingot and all the other each elements and aluminium according to above-mentioned component; In smelting furnace, melt, through deoxidation, degasification, skim, take a sample after the refining, after composition meets the demands; Left standstill 15 minutes, the adjustment teeming temperature is 670 ℃ and prepares cast;
Casting: the side seal of casting roller both sides provided be preheated to 460-475 ℃; Adjustment casting roller gap gap is 0mm; Aluminium alloy melt after will leaving standstill then is poured into vertical double-roller continuous casting machine through submerged nozzle; Control is that 40-60mm starts two rod continuous casters then through melt flow; Adjust the roll gap gap then and carry out casting to 0.2mm; It is 75-85mm that the stable back of casting keeps melt pool height; The casting speed of casting machine is 15m/min during casting; The strip base gets into pinch roll after leaving the casting roller, and the aluminum alloy thin tape thickness that casts out is 1.5mm;
Continuous homogenizing annealing: through the continuous annealing furnace annealing, annealing temperature is controlled at 590 ℃ with the strip after the casting;
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 0.4mm the most at last.
Embodiment three
A kind of punching press phone housing is with the preparation method of aluminium alloy strip; Wherein said aluminium alloy is made up of following component by weight percentage: Mg 2.25%; Fe 0.35%; Si 0.45%, and Zn 0.10%, and Mn 0.08%; Cu 0.020%; Ti 0.04%, and surplus is Al and unavoidable impurities, and described preparation method comprises the steps:
Melting: the master alloy that takes by weighing pure magnesium ingot, fine aluminium ingot and all the other each elements and aluminium according to above-mentioned component; In smelting furnace, melt, through deoxidation, degasification, skim, take a sample after the refining, after composition meets the demands; Left standstill 12 minutes, the adjustment teeming temperature is 680 ℃ and prepares cast;
Casting: the side seal of casting roller both sides provided be preheated to 460-475 ℃; Adjustment casting roller gap gap is 0mm; Aluminium alloy melt after will leaving standstill then is poured into vertical double-roller continuous casting machine through submerged nozzle; Control is that 40-60mm starts two rod continuous casters then through melt flow; Adjust the roll gap gap then and carry out casting to 0.3mm; It is 75-85mm that the stable back of casting keeps melt pool height; The casting speed of casting machine is 13m/min during casting; The strip base gets into pinch roll after leaving the casting roller, and the aluminum alloy thin tape thickness that casts out is 2.0mm;
Continuous homogenizing annealing: through the continuous annealing furnace annealing, annealing temperature is controlled at 580 ℃ with the strip after the casting;
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 (2)
1. a punching press phone housing is with the preparation method of aluminium alloy strip; It is characterized in that; Wherein said aluminium alloy is made up of following component by weight percentage: Mg 2.1-2.4%, Fe 0.3-0.4%, Si 0.3-0.55%; Zn 0.05-0.15%; Mn 0.07-0.09%, Cu 0.015-0.025%, Ti 0.03-0.05%; Surplus is Al and unavoidable impurities, and described preparation method comprises the steps:
Melting: the master alloy that takes by weighing pure magnesium ingot, fine aluminium ingot and all the other each elements and aluminium according to above-mentioned component; In smelting furnace, melt, through deoxidation, degasification, skim, take a sample after the refining, after composition meets the demands; Left standstill 10-15 minute, the adjustment teeming temperature is 670-690 ℃ and prepares cast;
Casting: the side seal of casting roller both sides provided be preheated to 460-475 ℃; Adjustment casting roller gap gap is 0mm; Aluminium alloy melt after will leaving standstill then is poured into vertical double-roller continuous casting machine through submerged nozzle; Control is that 40-60mm starts two rod continuous casters then through melt flow; Adjust the roll gap gap then and carry out casting to 0.2-0.4mm; It is 75-85mm that the stable back of casting keeps melt pool height; The casting speed of casting machine is 10-15m/min during casting; The strip base gets into pinch roll after leaving the casting roller, and the aluminum alloy thin tape thickness that casts out is 1.5-2.5mm;
Continuous homogenizing annealing: through the continuous annealing furnace annealing, annealing temperature is controlled at 570-590 ℃ with the strip after the casting;
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 0.4mm-0.6mm the most at last.
2. punching press phone housing as claimed in claim 1 is with the preparation method of aluminium alloy strip; It is characterized in that; Wherein said aluminium alloy is made up of following component by weight percentage: Mg 2.25%, and Fe 0.35%, and Si 0.45%; Zn 0.10%; Mn 0.08%, and Cu 0.020%, and Ti 0.04%; Surplus is Al and unavoidable impurities, and described preparation method comprises the steps:
Melting: the master alloy that takes by weighing pure magnesium ingot, fine aluminium ingot and all the other each elements and aluminium according to above-mentioned component; In smelting furnace, melt, through deoxidation, degasification, skim, take a sample after the refining, after composition meets the demands; Left standstill 12 minutes, the adjustment teeming temperature is 680 ℃ and prepares cast;
Casting: the side seal of casting roller both sides provided be preheated to 460-475 ℃; Adjustment casting roller gap gap is 0mm; Aluminium alloy melt after will leaving standstill then is poured into vertical double-roller continuous casting machine through submerged nozzle; Control is that 40-60mm starts two rod continuous casters then through melt flow; Adjust the roll gap gap then and carry out casting to 0.3mm; It is 75-85mm that the stable back of casting keeps melt pool height; The casting speed of casting machine is 13m/min during casting; The strip base gets into pinch roll after leaving the casting roller, and the aluminum alloy thin tape thickness that casts out is 2.0mm;
Continuous homogenizing annealing: through the continuous annealing furnace annealing, annealing temperature is controlled at 580 ℃ with the strip after the casting;
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.
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| CN2011103419403A CN102352456A (en) | 2011-11-02 | 2011-11-02 | Preparation method of aluminium alloy thin strip for cell phone stamped shell |
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Cited By (10)
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| CN105229185A (en) * | 2013-07-05 | 2016-01-06 | 株式会社Uacj | Heat exchanger aluminum alloy fin material and manufacture method thereof |
| CN106544557A (en) * | 2016-12-21 | 2017-03-29 | 东莞市灿煜金属制品有限公司 | A kind of manufacture method for meeting high-end oxidation requirements high-strength aluminium alloy plate band |
| CN109518030A (en) * | 2018-12-19 | 2019-03-26 | 昆明理工大学 | A kind of preparation method of graphene reinforced aluminum matrix composites |
| CN110216166A (en) * | 2019-06-21 | 2019-09-10 | 天津忠旺铝业有限公司 | A kind of production method of television stand aluminium alloy strips |
| CN111690856A (en) * | 2020-07-08 | 2020-09-22 | 甘肃东兴铝业有限公司 | Method for preparing 5052 aluminum alloy strip |
| CN114107745A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Preparation method of high-performance wide 6XXX aluminum alloy plate strip |
| CN114107760A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Novel particle-reinforced 7XXX aluminum alloy thin strip and preparation method thereof |
| CN114107766A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Preparation method of novel high-performance 7XXX aluminum alloy thin strip |
| CN114107750A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Preparation method of thin-strip continuous casting high-performance 6XXX aluminum alloy plate strip |
| CN114107768A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Preparation method of novel high-performance 7XXX aluminum alloy thin strip by jet casting |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105229185A (en) * | 2013-07-05 | 2016-01-06 | 株式会社Uacj | Heat exchanger aluminum alloy fin material and manufacture method thereof |
| CN105229185B (en) * | 2013-07-05 | 2017-11-17 | 株式会社Uacj | Heat exchanger aluminum alloy fin material and its manufacture method |
| US10145630B2 (en) | 2013-07-05 | 2018-12-04 | Uacj Corporation | Aluminum alloy fin material for heat exchangers, and method of producing the same |
| CN106544557A (en) * | 2016-12-21 | 2017-03-29 | 东莞市灿煜金属制品有限公司 | A kind of manufacture method for meeting high-end oxidation requirements high-strength aluminium alloy plate band |
| CN109518030A (en) * | 2018-12-19 | 2019-03-26 | 昆明理工大学 | A kind of preparation method of graphene reinforced aluminum matrix composites |
| CN110216166A (en) * | 2019-06-21 | 2019-09-10 | 天津忠旺铝业有限公司 | A kind of production method of television stand aluminium alloy strips |
| CN111690856A (en) * | 2020-07-08 | 2020-09-22 | 甘肃东兴铝业有限公司 | Method for preparing 5052 aluminum alloy strip |
| CN114107745A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Preparation method of high-performance wide 6XXX aluminum alloy plate strip |
| CN114107760A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Novel particle-reinforced 7XXX aluminum alloy thin strip and preparation method thereof |
| CN114107766A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Preparation method of novel high-performance 7XXX aluminum alloy thin strip |
| CN114107750A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Preparation method of thin-strip continuous casting high-performance 6XXX aluminum alloy plate strip |
| CN114107768A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Preparation method of novel high-performance 7XXX aluminum alloy thin strip by jet casting |
| CN114107760B (en) * | 2020-08-26 | 2023-01-20 | 宝山钢铁股份有限公司 | Particle-reinforced 7XXX aluminum alloy thin strip and preparation method thereof |
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Application publication date: 20120215 |