CN107058815B - 6xxx series aluminum alloy for appearance parts of 3C products and its processing method - Google Patents
6xxx series aluminum alloy for appearance parts of 3C products and its processing method Download PDFInfo
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- CN107058815B CN107058815B CN201611243553.5A CN201611243553A CN107058815B CN 107058815 B CN107058815 B CN 107058815B CN 201611243553 A CN201611243553 A CN 201611243553A CN 107058815 B CN107058815 B CN 107058815B
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 33
- 238000003672 processing method Methods 0.000 title abstract description 7
- 230000032683 aging Effects 0.000 claims abstract description 23
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 238000000137 annealing Methods 0.000 claims abstract description 3
- 229910052718 tin Inorganic materials 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 241000208340 Araliaceae Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 238000004321 preservation Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 27
- 230000000694 effects Effects 0.000 abstract description 23
- 230000003647 oxidation Effects 0.000 abstract description 16
- 238000007254 oxidation reaction Methods 0.000 abstract description 16
- 238000005266 casting Methods 0.000 abstract description 15
- 238000003483 aging Methods 0.000 abstract description 9
- 238000005275 alloying Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 239000000243 solution Substances 0.000 description 17
- 239000000956 alloy Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 229910052748 manganese Inorganic materials 0.000 description 8
- 239000004615 ingredient Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 6
- 230000002411 adverse Effects 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/05—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Conductive Materials (AREA)
Abstract
The present invention relates to a kind of 3C Product appearance member 6xxx line aluminium alloy and its processing method, the al alloy component and content are as follows: Mg0.4~0.8wt%, Si0.4~0.8wt%, Mn0.02~0.05wt%, Ti0.02~0.05wt%, Sn0.01~0.10wt%, Fe≤0.10wt%, Cu≤0.01wt%, Cr≤0.01wt%.Its processing method are as follows: 300~360 DEG C of homogenizing annealing are carried out to ingot casting and keeps the temperature 6~10 hours, then keeps the temperature 8~10 hours at 545~570 DEG C again；Then it is rolled, solution treatment, is parked in room temperature and carry out artificial aging in 72 hours.The present invention realizes the combination of higher age hardening capability, high rigidity and anodic oxidation effect by addition microelement, reasonably optimizing alloying component and technology controlling and process, is the ideal material for manufacturing electronic product appearance member, and market application prospect is wide.
Description
Technical field
The present invention relates to a kind of 3C Product appearance member 6xxx line aluminium alloy and its processing methods, belong to non-ferrous metal technology
Field.
Background technique
There are room temperature Shelf―time effects for usual 6xxx line aluminium alloy, i.e., after material quenching, it is necessary to artificial aging is carried out immediately, it is no
Peak aging time will be then postponed, or even reduces peak strength.But in 6xxx line aluminium alloy production process, due to equipment or life
The reason of arranging is produced, artificial aging, thus the mechanical property that material will be reduced generally can not be carried out immediately.Generally in 6xxx system aluminium
A small amount of Cu element (such as 6061,6111) can be added in alloy, to reduce room temperature Shelf―time effect to material final strength performance
Adverse effect.But the addition of Cu can have adverse effect on the corrosion resistance of material.
On the other hand, 6xxx line aluminium alloy is also widely used in the manufacture of 3C Product appearance member.In this application,
Need 6xxx line aluminium alloy that there is high anodic oxidation effect.Composition influence of the good anodic oxidation effect by material, alloy
Content is higher, and it is bigger that downward trend occurs in anodic oxidation effect.But alloy content is higher, and the intensity of material is higher, and high-strength
It is also the necessary performance of 3C aluminium alloy.Although the intensity of material can be improved in Cu, but have pole to the anodic oxidation effect of material
For detrimental effect.Therefore, it is necessary to develop a kind of avoidable room temperature Shelf―time effect, there is high age hardening capability and anodic oxygen
Change the aluminium alloy that effect is preferable, can be used for the manufacture of 3C Product appearance member.
Summary of the invention
The purpose of the present invention is overcoming the shortcomings of the prior art, provide a kind of with high age hardening capability and anode
Oxidation effectiveness preferable 3C Product appearance member 6xxx line aluminium alloy and its processing method.
The purpose of the present invention is achieved through the following technical solutions:
A kind of 3C Product appearance member 6xxx line aluminium alloy, constituent and content are as follows: 0.4~0.8wt% of Mg, Si
0.4~0.8wt%, 0.02~0.05wt% of Mn, 0.02~0.05wt% of Ti, 0.01~0.10wt.% of Sn, Fe≤
0.10wt%, Cu≤0.01wt%, Cr≤0.01wt%.
Further, Mg/Si mass ratio is 0.9~1.1 in the aluminium alloy.
The process steps of aforementioned 6xxx line aluminium alloy are as follows: the 6xxx line aluminium alloy cast ingot carries out homogenizing annealing,
6~10 hours are kept the temperature in 300~360 DEG C, then keeps the temperature 8~10 hours at 545~570 DEG C；Then it is rolled, solution treatment；
Then it is parked in room temperature and carries out artificial aging in 72 hours.
Further, the artificial aging parameter are as follows: 160~200 DEG C keep the temperature 2~12 hours.
Technical solution of the present invention substantive distinguishing features outstanding and significant progress are mainly reflected in:
1, material of the present invention can reduce natrual ageing to material property not by the control of alloying component and technique
Benefit influences；
2, aluminium alloy of the present invention, room temperature was parked in 72 hours after solution hardening, and the size of maximum elementide is less than 4
A atom, hardness, which rises, is less than 5HV, and hardness is greater than 100HV after artificial aging；
3, it is hard to realize higher timeliness by addition microelement, reasonably optimizing alloying component and technology controlling and process by the present invention
The combination of change ability, high rigidity and anodic oxidation effect is to manufacture the electronics having higher requirements to intensity and anodic oxidation effect
The ideal material of product appearance part, market application prospect are wide.
Specific embodiment
In 6xxx line aluminium alloy, Mg, Si element are main alloy elements, and total content and ratio determine the strong of material
Degree is horizontal.Mg, Si element total content are higher, then intensity is higher, but anodic oxidation color effects are then poorer, so comprehensively consider,
Mg constituent content is 0.4~0.8wt%, and Si constituent content is that 0.4~0.8wt% is advisable；And Mg/Si ratio preferably 0.9~
1.1, in favor of the precipitation of hardening constituent.
The addition of 6xxx line aluminium alloy Cu can reduce room temperature and park to material property detrimental effect, but its content should not surpass
0.01wt% is crossed, otherwise will affect the corrosion resistance and anodic oxidation effect of material.Mn, Ti, Cr are microelement, addition
The purpose of combinations particle size is mainly started to control into aluminium alloy, but its content is unsuitable excessively high, otherwise influences anodic oxidation color effects.
Therefore comprehensively consider and obtain: 0.02~0.05wt% of Mn, 0.02~0.05wt.% of Ti, Cr≤0.01wt%, Fe are impurity member
Element, content should be≤0.10wt%.
On the one hand it is and another party because being influenced by alloying component why 6xxx line aluminium alloy has room temperature Shelf―time effect
Face is because after aluminum alloy materials solution hardening, and material is in the hypersaturated state of solute and vacancy, be easy to cause age-hardening
Process is slow.Specific formation is as follows: after aluminum alloy materials solution hardening, material is in the hypersaturated state of solute and vacancy, if
Material is parked in room temperature, then vacancy can help Mg, Si solute mobile, forms elementide (containing Mg, Si)；The room temperature storage period gets over
Long, the size of elementide is bigger, and it is also bigger to be formed by volume fraction.Elementide during subsequent artificial aging,
It can not be stabilized, and can dissolve first or since vacancy concentration at this time is lower, then cause age-hardening process slow, and
Peak hardness decline or time to peak is caused seriously to lag.
Technical solution of the present invention adds Sn element in the material, exactly because it higher (can compare Cu in conjunction with vacancy
The combination in element and vacancy can be high), after material quenching can be slowed down, the formation (shape of elementide of elementide in room temperature process
At the participation for needing vacancy), i.e. reduction natrual ageing effect, thus can be improved material age-hardening dynamics after quenching and
Peak strength, or even shorten time to peak.But Sn content is unsuitable excessively high, otherwise influences the anodic oxidation effect of material, so its
Content is preferably 0.01~0.10wt%.
6xxx line aluminium alloy of the present invention, it is subsequent need to carry out fire processing, rolling, solid solution, room temperature is parked and timeliness
Processing.In equal fire processing, used technique is 300~360 DEG C and keeps the temperature 6~10 hours, then protects again at 545~570 DEG C
Temperature 8~10 hours；Low-temperature insulation is the dissolution in order to promote the low melting point phase containing Sn, and soak is then to promote
Mg2The dissolution of Si phase.Rolling and solution treatment are carried out to the material after equal fire, then be placed at room temperature in 72 hours carry out it is artificial
Timeliness；According to the difference of Sn content in material, different artificial aging systems need to be taken, when Sn content is higher, can be used compared with
Low temperature, shorter soaking time, vice versa.Comprehensively consider, artificial aging system is 160~200 DEG C and keeps the temperature 2~12 hours.
Below by way of specific embodiment, the technical scheme of the present invention will be further described.
Embodiment 1
Ingot casting ingredient and content are as follows: Mg 0.51wt%, Si 0.54wt%, Mn 0.03wt%, Ti0.02wt%, Sn
0.01wt%, Fe 0.08wt%, Cu 0.01wt%, Cr 0.01wt%；Ingot casting keeps the temperature 10 hours at 300 DEG C, then exists again
570 DEG C keep the temperature 10 hours；Then rolled, solution treatment, room temperature were parked in 72 hours, the size of maximum elementide is less than
4 atoms；Artificial aging system is 160 DEG C and keeps the temperature 12 hours.
Embodiment 2
Ingot casting ingredient and content are as follows: Mg 0.65wt%, Si 0.69wt%, Mn 0.04wt%, Ti0.03wt%, Sn
0.10wt%, Fe 0.10wt%, Cu 0.008wt%, Cr 0.007wt%；Ingot casting keeps the temperature 6 hours at 360 DEG C, then exists again
545 DEG C keep the temperature 8 hours；Then rolled, solution treatment, room temperature were parked in 72 hours, the size of maximum elementide is less than 4
A atom；Artificial aging system is 200 DEG C and keeps the temperature 2 hours.
Embodiment 3
Ingot casting ingredient and content are as follows: Mg 0.73wt%, Si 0.70wt%, Mn 0.05wt%, Ti0.03wt%, Sn
0.10wt%, Fe 0.10wt%, Cu 0.008wt%, Cr 0.007wt%；Ingot casting keeps the temperature 6 hours at 360 DEG C, then exists again
545 DEG C keep the temperature 8 hours；Then rolled, solution treatment, room temperature were parked in 72 hours, the size of maximum elementide is less than 4
A atom；Artificial aging system is 175 DEG C and keeps the temperature 4 hours.
Embodiment 4
Ingot casting ingredient and content are as follows: Mg 0.68wt%, Si 0.70wt%, Mn 0.04wt%, Ti0.04wt%, Sn
0.05wt%, Fe 0.10wt%, Cu 0.006wt%, Cr 0.006wt%；Ingot casting keeps the temperature 7 hours at 340 DEG C, then exists again
560 DEG C keep the temperature 9 hours；Then rolled, solution treatment, room temperature were parked in 72 hours, the size of maximum elementide is less than 4
A atom；Artificial aging system is 180 DEG C and keeps the temperature 3.5 hours.
Comparative example 1
Ingot casting ingredient and content are as follows: Mg 0.2wt%, Si 1.0wt%, Mn 0.10wt%, Ti 0.05wt%, Fe
0.10wt%, Cu 0.20wt%, Cr 0.20wt%；Ingot casting keeps the temperature 9 hours at 560 DEG C；Then rolled, solution treatment,
Room temperature was parked in 72 hours, 24 atoms of size of maximum elementide；Artificial aging system is 175 DEG C and keeps the temperature 8 hours.
Comparative example 2
Ingot casting ingredient and content are as follows: Mg 0.68wt%, Si 0.70wt%, Mn 0.04wt%, Ti0.04wt%, Sn
0.05wt%, Fe 0.10wt%, Cu 0.006wt%, Cr 0.006wt%；Ingot casting keeps the temperature 9 hours at 500 DEG C；Then it carries out
Rolling, solution treatment, room temperature were parked in 72 hours, less than 4 atoms of size of maximum elementide；Artificial aging system is
180 DEG C keep the temperature 4 hours.
Comparative example 3
Ingot casting ingredient and content are as follows: Mg 1.0wt%, Si 0.2wt%, Mn 0.03wt%, Ti 0.03wt%, Fe
0.15wt%, Cu 0.15wt%, Cr 0.11wt%；Ingot casting keeps the temperature 7 hours at 340 DEG C, then keeps the temperature 9 hours at 560 DEG C again；
Then it is rolled, solution treatment, room temperature were parked in 72 hours, 28 atoms of size of maximum elementide；Artificial aging system
Degree keeps the temperature 4 hours for 180 DEG C.
Table 1 illustrates the performance of alloy in Examples and Comparative Examples.
Table 1: the anodic oxidation effect of alloy in Examples and Comparative Examples
| Material | Room temperature parks hardness rising | Artificial aging hardness | Anodic oxidation effect |
| Embodiment 1 | Less than 5HV | 102HV | It is white |
| Embodiment 2 | Less than 5HV | 109HV | It is white |
| Embodiment 3 | Less than 5HV | 112HV | It is white |
| Embodiment 4 | Less than 5HV | 111HV | It is white |
| Comparative example 1 | 30HV | 89HV | Secretly, it turns to be yellow |
| Comparative example 2 | Less than 5HV | 92HV | It is white |
| Comparative example 3 | 32HV | 87HV | Secretly, it turns to be yellow |
By embodiment and table 1 it is found that 6 line aluminium alloy material of the present invention can be subtracted by the control of alloying component and technique
Adverse effect of the small natrual ageing to material property；The aluminium alloy processing method, after solution hardening, room temperature is parked 72 hours
Interior, less than 4 atoms of size of maximum elementide, hardness, which rises, is less than 5HV, and hardness is greater than 100HV after artificial aging.
In conclusion the present invention is realized higher by addition microelement, reasonably optimizing alloying component and technology controlling and process
The combination of age hardening capability, high rigidity and anodic oxidation effect is that manufacture has higher requirements to intensity and anodic oxidation effect
Electronic product appearance member ideal material.
The above is only specific application examples of the invention, are not limited in any way to protection scope of the present invention.All uses
Equivalent transformation or equivalent replacement and the technical solution formed, all fall within rights protection scope of the present invention.
Claims (3)
1. a kind of 3C Product appearance member 6xxx line aluminium alloy, it is characterised in that: the constituent and content of the aluminium alloy are as follows: Mg
0.4~0.8wt%, 0.4~0.8wt% of Si, 0.02~0.05wt% of Mn, 0.02~0.05wt% of Ti, Sn 0.01~
0.10wt.%, Fe≤0.10wt%, Cu≤0.01wt%, Cr≤0.01wt%, also, the aluminium alloy is obtained by the processing of following technique
: 6xxx line aluminium alloy cast ingot is first subjected to homogenizing annealing, keeps the temperature 6~10 hours in 300~360 DEG C, then 545~570
DEG C heat preservation 8~10 hours；Then it is rolled, solution treatment；It is finally parked in room temperature and carries out artificial aging in 72 hours.
2. 3C Product appearance member 6xxx line aluminium alloy according to claim 1, it is characterised in that: in the aluminium alloy
Mg/Si mass ratio is 0.9~1.1.
3. 3C Product appearance member 6xxx line aluminium alloy according to claim 1, it is characterised in that: the artificial aging ginseng
Number are as follows: 160~200 DEG C keep the temperature 2~12 hours.
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| CN109439979B (en) * | 2018-12-14 | 2021-02-23 | 湖南海铝汽车工业有限公司 | 6063T6 improved aluminum alloy and processing method thereof |
| CN113574192A (en) | 2019-03-13 | 2021-10-29 | 诺维尔里斯公司 | Age-hardenable, highly formable aluminium alloy and method for producing the same |
| CN112481527A (en) * | 2019-09-12 | 2021-03-12 | 晟通科技集团有限公司 | 6XXX series aluminum alloy round ingot and preparation method thereof |
| CN112609110B (en) * | 2020-12-31 | 2022-01-28 | 郑州轻研合金科技有限公司 | Aluminum lithium alloy capable of being anodized and preparation method thereof |
| CN114107753B (en) * | 2021-10-08 | 2022-10-11 | 中国科学院金属研究所 | A Design Method of 6082 Aluminum Alloy Without Parking Effect |
| CN116426800A (en) * | 2023-04-18 | 2023-07-14 | 广东中色研达新材料科技股份有限公司 | A kind of low-alloyed 6-series aluminum alloy and its processing method |
| CN117867423A (en) * | 2023-12-20 | 2024-04-12 | 苏州大学 | A method for regulating the precipitation of dispersed phase in aluminum alloy |
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| CN105238962A (en) * | 2015-10-12 | 2016-01-13 | 苏州中色研达金属技术有限公司 | High-performance 6XXX aluminum alloy for outer part of electronic product and machining method thereof |
| CN105238961A (en) * | 2015-10-12 | 2016-01-13 | 苏州中色研达金属技术有限公司 | 6XXX aluminum alloy and machining method thereof |
| CN105838927A (en) * | 2015-02-02 | 2016-08-10 | 株式会社神户制钢所 | High strength aluminum alloy sheet |
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| JP6315582B2 (en) * | 2014-08-27 | 2018-04-25 | 株式会社神戸製鋼所 | Aluminum alloy sheet for forming |
| JP6224549B2 (en) * | 2014-08-27 | 2017-11-01 | 株式会社神戸製鋼所 | Aluminum alloy plate with excellent rust resistance |
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| CN105838927A (en) * | 2015-02-02 | 2016-08-10 | 株式会社神户制钢所 | High strength aluminum alloy sheet |
| CN105238962A (en) * | 2015-10-12 | 2016-01-13 | 苏州中色研达金属技术有限公司 | High-performance 6XXX aluminum alloy for outer part of electronic product and machining method thereof |
| CN105238961A (en) * | 2015-10-12 | 2016-01-13 | 苏州中色研达金属技术有限公司 | 6XXX aluminum alloy and machining method thereof |
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