CN102352459A - Preparation method of magnesium alloy strip for cell phone shell - Google Patents
Preparation method of magnesium alloy strip for cell phone shell Download PDFInfo
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- CN102352459A CN102352459A CN201110342003XA CN201110342003A CN102352459A CN 102352459 A CN102352459 A CN 102352459A CN 201110342003X A CN201110342003X A CN 201110342003XA CN 201110342003 A CN201110342003 A CN 201110342003A CN 102352459 A CN102352459 A CN 102352459A
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Abstract
The invention discloses a preparation method of a magnesium alloy strip for a cell phone shell. The preparation method is characterized in that the magnesium alloy comprises the following components by weight percent: 2%-4.5% of Al, 0.5%-0.8% of Si, 0.7%-1.2% of Cu, 0.5%-1.0% of Mn, 0.1%-0.8% of Zn, 0.2%-0.3% of Ti and the balance of Mg and inevitable impurities. The preparation method comprises the following steps: smelting, performing homogenizing annealing, performing hot rolling and performing cold rolling. The tensile strength of the magnesium alloy strip is 190MPa-210MPa, the elongation at break is 8.0%-10.0%, and the earring rate is 2%-3%; and the magnesium alloy strip can meet the thin stretching and punching forming requirement of the cell phone shell.
Description
Technical field
The present invention relates to the magnesium alloy field, particularly a kind of handset shell is with the preparation method of magnesium alloy strip.
Background technology
Along with the develop rapidly of communication medium industry, the volume of mobile phone reduces gradually, and adopting the intensity and the hardness of attenuate housing wall thickness, raising case material is the important channel of lightweight, miniaturization.The product of conventional plastic matter shell more and more can not satisfy people's demand; 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.
Many premium propertiess such as magnesium alloy has that light weight is firm, antidetonation noise control, electromagnetic shielding and easy casting, so magnesium alloy is especially suitable for use as thin-gage goods such as phone housing.Along with the development of telecommunications industry, the application of magnesium alloy in handset shell obtains fast development, and its annual growth is up to more than 20%, and magnesium alloy is very wide in the application prospect in this field.
About existing handset shell uses under the magnesium alloy room temperature its tensile strength as 150MPa, elongation after fracture is 3%～8%, earing rate 4%～5% is difficult to satisfy the ironing punch forming requirement of mobile phone shell behind the material attenuate; The alloy grain of existing method of manufacture preparation is thick and tissue odds even.
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 handset shell with magnesium alloy strip; Existing application is low in the magnesium alloy strip tensile strength of handset shell, elongation after fracture is high, earing rate is high, is difficult to satisfy the problem that the ironing punch forming requires and alloy grain is thick and tissue odds is even of mobile phone shell behind the material attenuate to solve
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
A kind of handset shell is with the preparation method of magnesium alloy strip; Wherein said magnesium alloy is made up of following component by mass percentage: 2%～4.5% Al; 0.5%～0.8% Si, 0.7%～1.2% Cu, 0.5%～1.0% Mn, 0.1%～0.8% Zn, 0.2%～0.3% Ti, surplus is Mg and unavoidable impurities;
Said preparation method carries out as follows:
(1) takes by weighing magnesium silicon master alloy alloy, magnesium copper master alloy, magnesium manganese master alloy, magnesium zinc master alloy, magnesium titanium master alloy and fine aluminium ingot and pure magnesium ingot respectively by above-mentioned composition; Join in the smelting furnace then; Under 700 ℃～740 ℃ vacuum conditions, be smelted into the magnesium alloy liquation; Change over to through degasification, refining, after skimming and to leave standstill stove; Leave standstill 15min～30min, obtain melted magnesium alloy liquation; Behind the magnesium alloy liquation process ceramic filter that obtains, be cast as magnesium alloy ingot;
(2) magnesium alloy ingot that makes is placed in the equal stove, is heated to 380 ℃～410 ℃ and be incubated 3h, carry out homogenizing annealing and handle;
(3) will utilize through the magnesium alloy ingot of anneal and be rolled into the band work in-process on the hot rolls; Said hot-rolling method is: after earlier magnesium alloy ingot being heated to 470 ℃～500 ℃; Utilize hot rolls to carry out split rolling method; Temperature in the operation of rolling is controlled at 380 ℃～420 ℃, when the thickness of magnesium alloy ingot is 2mm～3mm, curls, and obtains the band work in-process
(4) utilize rolled by cold rolling machine to become the band finished product band work in-process; Said cold-rolling mill is a 4-roller cold rolling mill, and its roll surface roughness Ra is 0.16 μ m～0.32 μ m; Cold rolling process is: earlier be the band that cold rolling one-tenth thickness is 1.2mm under 38～42% the condition in every time working modulus with the band work in-process; Then with band through being heated to 420 ℃～430 ℃ and be incubated 1h and carry out process annealing, will become the band finished product of thick 0.3～0.5mm through the band once cold rolling that room temperature was handled and reduced in process annealing at last.
Preparing method's of the present invention beneficial effect is:
Magnesium alloy strip tensile strength of the present invention is that 190MPa～210MPa, elongation after fracture are 8.0%～10.0%, earing rate 2%～3%, can satisfy the ironing punch forming requirement of handset shell.Handset shell of the present invention is controlled the per-cent of each element in the alloy through strictness with the preparation method of magnesium alloy strip; And handle through homogenizing; Make magnesium alloy strip finished product grain structure evenly, not have the thick and uneven second phase particle, intensity, plasticity and the deep drawability of magnesium alloy are strengthened.
Embodiment
Embodiment one
A kind of handset shell is with the preparation method of magnesium alloy strip; Wherein said magnesium alloy is made up of following component by mass percentage: 2%Al; 0.8% Si, 0.7% Cu, 1.0% Mn, 0.1% Zn, 0.3% Ti, surplus is Mg and unavoidable impurities;
Said preparation method carries out as follows:
(1) takes by weighing magnesium silicon master alloy alloy, magnesium copper master alloy, magnesium manganese master alloy, magnesium zinc master alloy, magnesium titanium master alloy and fine aluminium ingot and pure magnesium ingot respectively by above-mentioned composition; Join in the smelting furnace then; Under 700 ℃～740 ℃ vacuum conditions, be smelted into the magnesium alloy liquation; Change over to through degasification, refining, after skimming and to leave standstill stove; Leave standstill 15min, obtain melted magnesium alloy liquation; Behind the magnesium alloy liquation process ceramic filter that obtains, be cast as magnesium alloy ingot;
(2) magnesium alloy ingot that makes is placed in the equal stove, is heated to 380 ℃ and be incubated 3h, carry out homogenizing annealing and handle;
(3) will utilize through the magnesium alloy ingot of anneal and be rolled into the band work in-process on the hot rolls; Said hot-rolling method is: after earlier magnesium alloy ingot being heated to 470 ℃, utilize hot rolls to carry out split rolling method, the temperature in the operation of rolling is controlled at 380 ℃～420 ℃, when the thickness of magnesium alloy ingot curls during for 2mm, obtains the band work in-process
(4) utilize rolled by cold rolling machine to become the band finished product band work in-process; Said cold-rolling mill is a 4-roller cold rolling mill, and its roll surface roughness Ra is 0.16 μ m～0.32 μ m; Cold rolling process is: earlier be the band that cold rolling one-tenth thickness is 1.2mm under 38～42% the condition in every time working modulus with the band work in-process; Then with band through being heated to 420 ℃ and be incubated 1h and carry out process annealing, will become the band finished product of thick 0.3mm through the band once cold rolling that room temperature was handled and reduced in process annealing at last.
The magnesium alloy tensile strength of present embodiment preparation is that 195MPa, elongation after fracture are 8.8%, earing rate 2.2%.
Embodiment two
A kind of handset shell is with the preparation method of magnesium alloy strip; Wherein said magnesium alloy is made up of following component by mass percentage: 4.5% Al; 0.5% Si, 1.2% Cu, 0.5% Mn, 0.8% Zn, 0.2% Ti, surplus is Mg and unavoidable impurities;
Said preparation method carries out as follows:
(1) takes by weighing magnesium silicon master alloy alloy, magnesium copper master alloy, magnesium manganese master alloy, magnesium zinc master alloy, magnesium titanium master alloy and fine aluminium ingot and pure magnesium ingot respectively by above-mentioned composition; Join in the smelting furnace then; Under 700 ℃～740 ℃ vacuum conditions, be smelted into the magnesium alloy liquation; Change over to through degasification, refining, after skimming and to leave standstill stove; Leave standstill 30min, obtain melted magnesium alloy liquation; Behind the magnesium alloy liquation process ceramic filter that obtains, be cast as magnesium alloy ingot;
(2) magnesium alloy ingot that makes is placed in the equal stove, is heated to 410 ℃ and be incubated 3h, carry out homogenizing annealing and handle;
(3) will utilize through the magnesium alloy ingot of anneal and be rolled into the band work in-process on the hot rolls; Said hot-rolling method is: after earlier magnesium alloy ingot being heated to 500 ℃, utilize hot rolls to carry out split rolling method, the temperature in the operation of rolling is controlled at 380 ℃～420 ℃, when the thickness of magnesium alloy ingot curls during for 3mm, obtains the band work in-process
(4) utilize rolled by cold rolling machine to become the band finished product band work in-process; Said cold-rolling mill is a 4-roller cold rolling mill, and its roll surface roughness Ra is 0.16 μ m～0.32 μ m; Cold rolling process is: earlier be the band that cold rolling one-tenth thickness is 1.2mm under 38～42% the condition in every time working modulus with the band work in-process; Then with band through being heated to 430 ℃ and be incubated 1h and carry out process annealing, will become the band finished product of thick 0.5mm through the band once cold rolling that room temperature was handled and reduced in process annealing at last.
The magnesium alloy tensile strength of present embodiment preparation is that 200MPa, elongation after fracture are 8.3%, earing rate 2.6%.
Embodiment three
A kind of handset shell is with the preparation method of magnesium alloy strip; Wherein said magnesium alloy is made up of following component by mass percentage: 3.0% Al; 0.7% Si, 0.9% Cu, 0.7% Mn, 0.5% Zn, 0.25% Ti, surplus is Mg and unavoidable impurities;
Said preparation method carries out as follows:
(1) takes by weighing magnesium silicon master alloy alloy, magnesium copper master alloy, magnesium manganese master alloy, magnesium zinc master alloy, magnesium titanium master alloy and fine aluminium ingot and pure magnesium ingot respectively by above-mentioned composition; Join in the smelting furnace then; Under 700 ℃～740 ℃ vacuum conditions, be smelted into the magnesium alloy liquation; Change over to through degasification, refining, after skimming and to leave standstill stove; Leave standstill 20min, obtain melted magnesium alloy liquation; Behind the magnesium alloy liquation process ceramic filter that obtains, be cast as magnesium alloy ingot;
(2) magnesium alloy ingot that makes is placed in the equal stove, is heated to 395 ℃ and be incubated 3h, carry out homogenizing annealing and handle;
(3) will utilize through the magnesium alloy ingot of anneal and be rolled into the band work in-process on the hot rolls; Said hot-rolling method is: after earlier magnesium alloy ingot being heated to 485 ℃, utilize hot rolls to carry out split rolling method, the temperature in the operation of rolling is controlled at 380 ℃～420 ℃, when the thickness of magnesium alloy ingot curls during for 3mm, obtains the band work in-process
(4) utilize rolled by cold rolling machine to become the band finished product band work in-process; Said cold-rolling mill is a 4-roller cold rolling mill, and its roll surface roughness Ra is 0.16 μ m～0.32 μ m; Cold rolling process is: earlier be the band that cold rolling one-tenth thickness is 1.2mm under 38～42% the condition in every time working modulus with the band work in-process; Then with band through being heated to 425 ℃ and be incubated 1h and carry out process annealing, will become the band finished product of thick 0.4mm through the band once cold rolling that room temperature was handled and reduced in process annealing at last.
The magnesium alloy tensile strength of present embodiment preparation is that 205MPa, elongation after fracture are 9.3%, earing rate 2.4%.
Embodiment four
A kind of handset shell is with the preparation method of magnesium alloy strip; Wherein said magnesium alloy is made up of following component by mass percentage: 2.5% Al; 0.6% Si, 0.8% Cu, 0.6% Mn, 0.3% Zn, 0.2% Ti, surplus is Mg and unavoidable impurities;
Said preparation method is with the preparation method of embodiment three.
The magnesium alloy tensile strength of present embodiment preparation is that 191MPa, elongation after fracture are 9.9%, earing rate 2.8%.
Embodiment five
A kind of handset shell is with the preparation method of magnesium alloy strip; Wherein said magnesium alloy is made up of following component by mass percentage: 4.0% Al; 0.7% Si, 1.0% Cu, 0.9% Mn, 0.7% Zn, 0.3% Ti, surplus is Mg and unavoidable impurities;
Said preparation method is with the preparation method of embodiment three.
The magnesium alloy tensile strength of present embodiment preparation is that 208MPa, elongation after fracture are 8.2%, earing rate 2.6%.
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 handset shell is with the preparation method of magnesium alloy strip; It is characterized in that; Wherein said magnesium alloy is made up of following component by mass percentage: 2%～4.5% Al; 0.5%～0.8% Si, 0.7%～1.2% Cu, 0.5%～1.0% Mn, 0.1%～0.8% Zn, 0.2%～0.3% Ti, surplus is Mg and unavoidable impurities;
Said preparation method carries out as follows:
(1) takes by weighing magnesium silicon master alloy alloy, magnesium copper master alloy, magnesium manganese master alloy, magnesium zinc master alloy, magnesium titanium master alloy and fine aluminium ingot and pure magnesium ingot respectively by above-mentioned composition; Join in the smelting furnace then; Under 700 ℃～740 ℃ vacuum conditions, be smelted into the magnesium alloy liquation; Change over to through degasification, refining, after skimming and to leave standstill stove; Leave standstill 15min～30min, obtain melted magnesium alloy liquation; Behind the magnesium alloy liquation process ceramic filter that obtains, be cast as magnesium alloy ingot;
(2) magnesium alloy ingot that makes is placed in the equal stove, is heated to 380 ℃～410 ℃ and be incubated 3h, carry out homogenizing annealing and handle;
(3) will utilize through the magnesium alloy ingot of anneal and be rolled into the band work in-process on the hot rolls; Said hot-rolling method is: after earlier magnesium alloy ingot being heated to 470 ℃～500 ℃; Utilize hot rolls to carry out split rolling method; Temperature in the operation of rolling is controlled at 380 ℃～420 ℃, when the thickness of magnesium alloy ingot is 2mm～3mm, curls, and obtains the band work in-process
(4) utilize rolled by cold rolling machine to become the band finished product band work in-process; Cold rolling process is: earlier be the band that cold rolling one-tenth thickness is 1.2mm under 38～42% the condition in every time working modulus with the band work in-process; Then with band through being heated to 420 ℃～430 ℃ and be incubated 1h and carry out process annealing, will become the band finished product of thick 0.3～0.5mm through the band once cold rolling that room temperature was handled and reduced in process annealing at last.
2. handset shell as claimed in claim 1 is with the preparation method of magnesium alloy strip; Wherein said magnesium alloy is made up of following component by mass percentage: 3.0% Al; 0.7% Si, 0.9% Cu, 0.7% Mn, 0.5% Zn, 0.25% Ti, surplus is Mg and unavoidable impurities.
3. handset shell as claimed in claim 1 is with the preparation method of magnesium alloy strip, and said cold-rolling mill is a 4-roller cold rolling mill, and its roll surface roughness Ra is 0.16 μ m～0.32 μ m.
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| CN102400024A (en) * | 2011-11-14 | 2012-04-04 | 周涛 | Magnesium alloy for housing of electric bicycle instrument panel |
| CN103290288A (en) * | 2013-06-26 | 2013-09-11 | 重庆大学 | Low-cost and high-ductility wrought magnesium alloy and preparation method thereof |
| CN103316911A (en) * | 2013-05-24 | 2013-09-25 | 燕山大学 | Magnesium alloy plate machining method |
| CN104109827A (en) * | 2014-08-11 | 2014-10-22 | 重庆科技学院 | Rolling technology of Mg-Zn magnesium alloy sheet |
| CN104109787A (en) * | 2013-04-18 | 2014-10-22 | 嘉兴中科亚美合金技术有限责任公司 | Cerium-containing deformed magnesium alloy suitable for sheet material and preparation method |
| CN105441760A (en) * | 2016-01-05 | 2016-03-30 | 张颖 | Surface electro-coppering method for titanium-magnesium alloy housing of tablet personal computer |
| CN105463278A (en) * | 2016-01-05 | 2016-04-06 | 张颖 | Method for preparing titanium-magnesium alloy tablet computer shell electroplating copper on surface |
| CN105543602A (en) * | 2016-01-29 | 2016-05-04 | 张颖 | Method for preparing magnesium alloy smart phone shell electroplating copper on surface |
| CN105543601A (en) * | 2016-01-29 | 2016-05-04 | 张颖 | Method for electroplating copper on surface of magnesium alloy smart phone shell |
| CN105603471A (en) * | 2016-01-05 | 2016-05-25 | 张颖 | Surface copper electro-plating solution of titanium-magnesium alloy tablet computer shell |
| CN105671389A (en) * | 2016-01-29 | 2016-06-15 | 张颖 | Surface copper electroplating liquid of magnesium alloy intelligent mobile phone shell |
| CN105779917A (en) * | 2014-12-15 | 2016-07-20 | 中国电子科技集团公司第十八研究所 | Preparation method of ultra-thin wide fine-grain magnesium alloy sheet |
| CN102400024B (en) * | 2011-11-14 | 2016-11-30 | 泉州台商投资区尚良建筑装饰有限公司 | A kind of magnesium alloy for housing of electric bicycle instrument panel |
| CN106244877A (en) * | 2016-06-08 | 2016-12-21 | 南阳师范学院 | A kind of handset shell magnesium alloy materials and preparation method thereof |
| CN106868327A (en) * | 2017-02-08 | 2017-06-20 | 上海琛岫自控科技有限公司 | A kind of surface has the preparation method of the magnesium alloy smart mobile phone housing of antibiotic layer |
| CN107142395A (en) * | 2017-04-26 | 2017-09-08 | 重庆大学 | A kind of Zn Mg Ti intermediate alloys and the method for preparing Mg Zn systems magnesium alloy |
| CN109985922A (en) * | 2017-12-29 | 2019-07-09 | 南京理工大学 | A kind of preparation method of multiple grain scale reinforced magnesium alloy material |
| CN110241346A (en) * | 2019-07-04 | 2019-09-17 | 中国科学院金属研究所 | A kind of high-strength high rigidity cast magnesium alloy and preparation method thereof |
| CN110883088A (en) * | 2019-11-14 | 2020-03-17 | 江阴康瑞成型技术科技有限公司 | Processing technology of titanium alloy mobile phone frame |
| CN115161590A (en) * | 2022-08-15 | 2022-10-11 | 深圳市楠轩光电科技有限公司 | Vacuum coating magnetron sputtering film forming method |
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| CN102400024A (en) * | 2011-11-14 | 2012-04-04 | 周涛 | Magnesium alloy for housing of electric bicycle instrument panel |
| CN102400024B (en) * | 2011-11-14 | 2016-11-30 | 泉州台商投资区尚良建筑装饰有限公司 | A kind of magnesium alloy for housing of electric bicycle instrument panel |
| CN104109787A (en) * | 2013-04-18 | 2014-10-22 | 嘉兴中科亚美合金技术有限责任公司 | Cerium-containing deformed magnesium alloy suitable for sheet material and preparation method |
| CN103316911A (en) * | 2013-05-24 | 2013-09-25 | 燕山大学 | Magnesium alloy plate machining method |
| CN103316911B (en) * | 2013-05-24 | 2015-03-25 | 燕山大学 | Magnesium alloy plate machining method |
| CN103290288A (en) * | 2013-06-26 | 2013-09-11 | 重庆大学 | Low-cost and high-ductility wrought magnesium alloy and preparation method thereof |
| US20150000800A1 (en) * | 2013-06-26 | 2015-01-01 | Chongqing University | Low-cost high-plasticity wrought magnesium alloy and its preparation method |
| CN103290288B (en) * | 2013-06-26 | 2015-10-07 | 重庆大学 | A kind of low cost high-ductility wrought magnesium alloy and preparation method thereof |
| CN104109827A (en) * | 2014-08-11 | 2014-10-22 | 重庆科技学院 | Rolling technology of Mg-Zn magnesium alloy sheet |
| CN105779917B (en) * | 2014-12-15 | 2018-04-17 | 中国电子科技集团公司第十八研究所 | A kind of preparation method of wide cut fine grain magnesium alloy ultrathin plate |
| CN105779917A (en) * | 2014-12-15 | 2016-07-20 | 中国电子科技集团公司第十八研究所 | Preparation method of ultra-thin wide fine-grain magnesium alloy sheet |
| CN105603471A (en) * | 2016-01-05 | 2016-05-25 | 张颖 | Surface copper electro-plating solution of titanium-magnesium alloy tablet computer shell |
| CN105441760A (en) * | 2016-01-05 | 2016-03-30 | 张颖 | Surface electro-coppering method for titanium-magnesium alloy housing of tablet personal computer |
| CN105463278A (en) * | 2016-01-05 | 2016-04-06 | 张颖 | Method for preparing titanium-magnesium alloy tablet computer shell electroplating copper on surface |
| CN105671389A (en) * | 2016-01-29 | 2016-06-15 | 张颖 | Surface copper electroplating liquid of magnesium alloy intelligent mobile phone shell |
| CN105543602A (en) * | 2016-01-29 | 2016-05-04 | 张颖 | Method for preparing magnesium alloy smart phone shell electroplating copper on surface |
| CN105543601A (en) * | 2016-01-29 | 2016-05-04 | 张颖 | Method for electroplating copper on surface of magnesium alloy smart phone shell |
| CN105543601B (en) * | 2016-01-29 | 2018-03-16 | 福建省永春天露农林专业合作社 | A kind of electroplating surface copper method of magnesium alloy smart mobile phone housing |
| CN106244877A (en) * | 2016-06-08 | 2016-12-21 | 南阳师范学院 | A kind of handset shell magnesium alloy materials and preparation method thereof |
| CN106868327A (en) * | 2017-02-08 | 2017-06-20 | 上海琛岫自控科技有限公司 | A kind of surface has the preparation method of the magnesium alloy smart mobile phone housing of antibiotic layer |
| CN107142395A (en) * | 2017-04-26 | 2017-09-08 | 重庆大学 | A kind of Zn Mg Ti intermediate alloys and the method for preparing Mg Zn systems magnesium alloy |
| CN107142395B (en) * | 2017-04-26 | 2018-06-19 | 重庆大学 | A kind of Zn-Mg-Ti intermediate alloys and the method for being used to prepare Mg-Zn systems magnesium alloy |
| CN109985922A (en) * | 2017-12-29 | 2019-07-09 | 南京理工大学 | A kind of preparation method of multiple grain scale reinforced magnesium alloy material |
| CN110241346A (en) * | 2019-07-04 | 2019-09-17 | 中国科学院金属研究所 | A kind of high-strength high rigidity cast magnesium alloy and preparation method thereof |
| CN110883088A (en) * | 2019-11-14 | 2020-03-17 | 江阴康瑞成型技术科技有限公司 | Processing technology of titanium alloy mobile phone frame |
| CN110883088B (en) * | 2019-11-14 | 2021-06-01 | 江阴康瑞成型技术科技有限公司 | Processing technology of titanium alloy mobile phone frame |
| CN115161590A (en) * | 2022-08-15 | 2022-10-11 | 深圳市楠轩光电科技有限公司 | Vacuum coating magnetron sputtering film forming method |
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Application publication date: 20120215 |