CN106350714B - A kind of 3C industries high-end anodic oxidation aluminium strip and its production method - Google Patents
A kind of 3C industries high-end anodic oxidation aluminium strip and its production method Download PDFInfo
- Publication number
- CN106350714B CN106350714B CN201610735720.1A CN201610735720A CN106350714B CN 106350714 B CN106350714 B CN 106350714B CN 201610735720 A CN201610735720 A CN 201610735720A CN 106350714 B CN106350714 B CN 106350714B
- Authority
- CN
- China
- Prior art keywords
- aluminium
- thickness
- industries
- temperature
- anodic oxidation
- Prior art date
Links
- 239000004411 aluminium Substances 0.000 title claims abstract description 101
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 101
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound 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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
- C22C21/06—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
- C22C—ALLOYS
- C22C1/00—Making alloys
- C22C1/02—Making alloys by melting
- C22C1/026—Alloys based on aluminium
-
- 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
-
- 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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
-
- 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
Abstract
Description
First, technical field:
The present invention relates to a kind of aluminium alloy and its production method, is used more particularly to a kind of 3C industries with high-end anodic oxidation Aluminium strip and its production method.
2nd, background technology:
The common shell materials of electronic product 3C Product have at present:Almag, titanium alloy, plastic casing have carbon fiber and ABS engineering plastics.From the point of view of electronic product various types of materials, almag shell is undoubtedly the most attractive in appearance, environmentally friendly, easy processing, valency The advantages such as lattice are low.
Existing market is used for the requirement more and more higher on the surface such as electronics, electrical equipment, packaging material, surface pattern, roughness, no Can there are scuffing, black silk, white point etc., this product can be described as no defective product, and 5252 high-end oxidation item kind purposes mainly collect In in phone housing, mobile phone key, air-conditioning panel, notebook computer shell, keyboard etc., 5252 high-end oxidation material product treatment techniques For:Charging-anode-radium-shine-engraving-printing-PVD-nickel sheet-plating (wire drawing)-colouring, shell glossiness can add Enter delustering agent to realize surface shading value, after being painted using anodic oxidation housing can be made to be processed into a variety of different colours.3C Product It is harsh to material requirements, electronics, collector surface are not allow for abrading, scratched, hole, slag inclusion, black silk, secret note, and require Structure property is good.
3rd, the content of the invention:
The technical problem to be solved in the present invention is:A kind of 3C industries high-end anodic oxidation aluminium strip and its producer are provided Method.The aluminium strip produced using technical solution of the present invention, can effectively solve the problem that the electronic apparatus aluminium alloy present in prior art Because of quality problems such as internal hydrogen content height, uneven microstructure, the black silk in surface, stripeds in aluminium strip production.
In order to solve the above problems, the present invention adopts the technical scheme that:
The present invention provides a kind of high-end anodic oxidation aluminium strip of 3C industries, is represented with weight percentage, the 3C productions Industry is formed with the chemical alloying element of high-end anodic oxidation aluminium strip:
Si≤0.03%, Fe≤0.05%, Cu 0.04~0.08%, Mn≤0.01, Mg 2.3~2.5%, Cr≤ 0.01%, Zn≤0.01%, Ti 0.008~0.012%, surplus Al.
Additionally, it is provided a kind of production method of 3C industries with high-end anodic oxidation aluminium strip, the production method include with Lower step:
A, cast aluminium alloy gold ingot casting:Above-mentioned 3C industries are first according to be carried out with high-end anodic oxidation with the proportion scale of aluminium strip Dispensing, the various raw materials of preparation are added into melting furnace, melting is carried out under the conditions of 720~760 DEG C;All after fusing, 690~ Aluminium alloy cast ingot is cast as using casting machine under the conditions of 715 DEG C;
B, head, milling face are sawed:By aluminium alloy cast ingot two, respectively saw removes 300mm, then carries out milling face, it is desirable to big face one side milling face Amount >=20mm, facet one side milling face amount >=10mm, ingot casting both sides thickness difference≤3mm;
C, the aluminium alloy cast ingot behind milling face is subjected to soaking, heated;
D, the aluminium alloy cast ingot after heating is subjected to hot roughing, hot finishing successively;
E, O state aluminum alloy coiled materials after step d finish rolling or H32 aluminum alloy coiled materials are subjected to cold rolling;
F, intermediate annealing is carried out to the O state aluminum alloy coiled materials after step e cold rollings;To the H32 state aluminium after step e cold rollings Alloy rolled material is cleaned, stabilization processes;
G, the O state aluminum alloy coiled materials after step f is annealed are cleaned, bundling and packed;After stabilization processes H32 state aluminium alloys coiled material carries out bundling and packed.
Production method according to above-mentioned 3C industries with high-end anodic oxidation aluminium strip, soaking in step c, heat Detailed process is:Aluminium alloy cast ingot behind milling face is heated using soaking pit, the first stage:Control soaking pit furnace gas Temperature is 630 DEG C, and aluminium alloy cast ingot temperature reaches 564~575 DEG C, is incubated 8~12 hours on this condition;Second stage:Stop Only heat up operation, when when aluminium alloy cast ingot temperature is down to 490~510 DEG C, insulation 4~6 is small, is directly come out of the stove after insulation.
Production method according to above-mentioned 3C industries with high-end anodic oxidation aluminium strip, rolls described in step d during hot roughing Passage processed is 11~13 passages, and emulsion pressure is 0.4~0.6MPa, and concentration is 5~6%, and temperature control is when roughing is completed 390~450 DEG C;Emulsion pressure is 0.4~0.6MPa during the hot finishing, and concentration is 5~6%, compressed air pressure is 0.2~ 0.4MPa, finishing temperature is 310~330 DEG C after hot finishing, and the thickness of aluminum alloy plate materials is 6.0mm after the completion of hot rolling.
Production method according to above-mentioned 3C industries with high-end anodic oxidation aluminium strip, cold rolling described in step e are O state Aluminium sheet cold rolling or H32 state aluminium sheet cold rollings.
Production method according to above-mentioned 3C industries with high-end anodic oxidation aluminium strip, the tool of the O state aluminium sheet cold rolling Body process is:Cold rolling is divided into 4 passages and rolled, and the 1st passage aluminium sheet import thickness is 6.0mm, exit thickness 4.2mm; 2nd passage aluminium sheet import thickness is 4.2mm, exit thickness 2.8mm;3rd passage aluminium sheet import thickness is 2.8mm, and outlet is thick Spend for 1.5mm;4th passage aluminium sheet import thickness is 1.5mm, exit thickness 0.8mm.
Production method according to above-mentioned 3C industries with high-end anodic oxidation aluminium strip, the H32 states aluminium sheet cold rolling Detailed process is:Cold rolling is divided into 4 passages and rolled, and the 1st passage aluminium sheet import thickness is 6.0mm, and exit thickness is 4.0mm;2nd passage aluminium sheet import thickness is 4.0mm, exit thickness 2.0mm;3rd passage aluminium sheet import thickness is 2.0mm, Exit thickness is 1.15mm;Intermediate annealing is carried out after 3rd passes, then carries out the 4th passes, the 4th passage aluminium sheet enters Mouth thickness is 1.15mm, exit thickness 0.8mm.
Production method according to above-mentioned 3C industries with high-end anodic oxidation aluminium strip, the detailed process of the intermediate annealing For:Intermediate annealing, 480 DEG C of furnace gas constant temperature are carried out using nitrogen protection stove, insulation 4 is small when metal temperature reaches 320~330 DEG C When, natural cooling of coming out of the stove.
Production method according to above-mentioned 3C industries with high-end anodic oxidation aluminium strip, intermediate annealing described in step f Detailed process is:Intermediate annealing, 480 DEG C of furnace gas constant temperature, when metal temperature reaches 320~330 DEG C are carried out using nitrogen protection stove Insulation 4 hours, natural cooling of coming out of the stove.
Production method according to above-mentioned 3C industries with high-end anodic oxidation aluminium strip, stabilization processes described in step f For:Heated using n 2 annealing stove, furnace gas temperature is 120 DEG C, and 5h is incubated under this temperature conditions, is gone out after insulation Stove.
The positive beneficial effect of the present invention:
1st, the aluminium strip produced using technical solution of the present invention, can effectively solve the problem that the electronic apparatus in the presence of prior art Because of quality problems such as internal hydrogen content height, uneven microstructure, the black silk in surface, stripeds in being produced with aluminium alloy aluminium strip.
2nd, the present invention carries out production operation using rafifinal, the shadow for instrument among elimination melting and casting to melt impurity Ring, all meltings and casting tool brush boron nitride coating are simultaneously dried and carry out operation again, using in bottom type permanent magnetic stirring and stove from The method of dynamic refining, so as to effectively eliminate caused by artificial degasification, hydrogen content is high, ensures that melt hydrogen content is less than 0.12ml/100g (Al), permanent magnetic stirring technology ensure that composition is uniform, prevent chemical composition from assembling, and hot finishing is produced using Germany Spray beam be lubricated, aluminium strip surface can be effectively improved without a series of defects such as black silk, secret note, viscous aluminium, striped, thick difference be big, Laid the foundation for the high-quality band of cold rolling.
3rd, the 3C industries produced using technical solution of the present invention are referred to the correlated performance technology of high-end anodic oxidation aluminium strip Mark refers to table 1.
The correlated performance technical indicator of 1 product of the present invention of table
4th, embodiment:
The present invention is expanded on further with reference to embodiments, but is not intended to limit present disclosure.
Embodiment 1:
The high-end anodic oxidation aluminium strip of 3C industries of the present invention, is represented with weight percentage, the chemical alloying member of aluminium strip Element forms:
Si≤0.03%, Fe≤0.05%, Cu 0.06%, Mn≤0.01, Mg 2.4%, Cr≤0.01%, Zn≤ 0.01%, Ti 0.0095%, surplus Al.
Embodiment 2:
The high-end anodic oxidation aluminium strip of 3C industries of the present invention, is represented with weight percentage, the chemical alloying member of aluminium strip Element forms:
Si≤0.03%, Fe≤0.05%, Cu 0.04%, Mn≤0.01, Mg 2.3%, Cr≤0.01%, Zn≤ 0.01%, Ti 0.008%, surplus Al.
Embodiment 3:
The high-end anodic oxidation aluminium strip of 3C industries of the present invention, is represented with weight percentage, the chemical alloying member of aluminium strip Element forms:
Si≤0.03%, Fe≤0.05%, Cu 0.08%, Mn≤0.01, Mg 2.5%, Cr≤0.01%, Zn≤ 0.01%, Ti 0.012%, surplus Al.
Embodiment 4:
The production method of the high-end anodic oxidation aluminium strip of 3C industries described in the embodiment of the present invention 1, the production method it is detailed Thin step is as follows:
A, cast aluminium alloy gold ingot casting:It is first according to dispensing of the 3C industries described in embodiment 1 with high-end anodic oxidation aluminium strip Ratio carries out dispensing, and the various raw materials of preparation are added into melting furnace, melting is carried out under the conditions of 740 DEG C;All after fusing, Aluminium alloy cast ingot is cast as using casting machine under the conditions of 700 DEG C;
B, head, milling face are sawed:By aluminium alloy cast ingot two, respectively saw removes 300mm, then carries out milling face, it is desirable to big face one side milling face Amount >=20mm, facet one side milling face amount >=10mm, ingot casting both sides thickness difference≤3mm;
C, the aluminium alloy cast ingot behind milling face is subjected to soaking, heated;
The soaking, the detailed process heated are:Aluminium alloy cast ingot behind milling face is heated using soaking pit Processing, first stage:It is 630 DEG C to control soaking pit furnace gas temperature, and aluminium alloy cast ingot temperature reaches 570 DEG C, protects on this condition Temperature 10 hours;Second stage:Stop heating operation, it is straight after insulation when when aluminium alloy cast ingot temperature is down to 500 DEG C, insulation 5 is small Pick out stove;
D, the aluminium alloy cast ingot after heating is subjected to hot roughing, hot finishing successively;
12 passages of rolling pass during the hot roughing, emulsion pressure are 0.5MPa, concentration 5.5%, when roughing is completed Temperature control is 420 DEG C;Emulsion pressure is 0.5MPa during the hot finishing, concentration 5.5%, and compressed air pressure is 0.3MPa, finishing temperature is 320 DEG C after hot finishing, and the thickness of aluminum alloy plate materials is 6.0mm after the completion of hot rolling;
E, O state aluminum alloy coiled materials after step d finish rolling or H32 aluminum alloy coiled materials are subjected to cold rolling;
The detailed process of the O state aluminium sheet cold rolling is:Cold rolling is divided into 4 passages and rolled, the 1st passage aluminium sheet import Thickness is 6.0mm, exit thickness 4.2mm;2nd passage aluminium sheet import thickness is 4.2mm, exit thickness 2.8mm;3rd Secondary aluminium sheet import thickness is 2.8mm, exit thickness 1.5mm;4th passage aluminium sheet import thickness is 1.5mm, and exit thickness is 0.8m;
The detailed process of the H32 states aluminium sheet cold rolling is:Cold rolling is divided into 4 passages and rolled, and the 1st passage aluminium sheet enters Mouth thickness is 6.0mm, exit thickness 4.0mm;2nd passage aluminium sheet import thickness is 4.0mm, exit thickness 2.0mm;3rd Passage aluminium sheet import thickness is 2.0mm, exit thickness 1.15mm;After 3rd passes carry out intermediate annealing (intermediate annealing Detailed process is:Intermediate annealing, 480 DEG C of furnace gas constant temperature, when metal temperature reaches 320~330 DEG C are carried out using nitrogen protection stove Insulation 4 hours, natural cooling of coming out of the stove), the 4th passes are then carried out, the 4th passage aluminium sheet import thickness is 1.15mm, outlet Thickness is 0.8mm;
F, intermediate annealing is carried out to the O state aluminum alloy coiled materials after step e cold rollings (detailed process of intermediate annealing is:Adopt Intermediate annealing, 480 DEG C of furnace gas constant temperature are carried out with nitrogen protection stove, metal temperature is incubated 4 hours when reaching 320~330 DEG C, come out of the stove Natural cooling);H32 state aluminium alloy coiled materials after step e cold rollings are cleaned, stabilization processes (use n 2 annealing stove Heated, furnace gas temperature is 120 DEG C, and 5h is incubated under this temperature conditions, is come out of the stove after insulation);
G, the O state aluminum alloy coiled materials after step f is annealed are cleaned, bundling and packed;After stabilization processes H32 state aluminium alloys coiled material carries out bundling and packed.
Embodiment 5:
The production method of the high-end anodic oxidation aluminium strip of 3C industries described in the embodiment of the present invention 2, the production method it is detailed Thin step is as follows:
A, cast aluminium alloy gold ingot casting:It is first according to dispensing of the 3C industries described in embodiment 2 with high-end anodic oxidation aluminium strip Ratio carries out dispensing, and the various raw materials of preparation are added into melting furnace, melting is carried out under the conditions of 720 DEG C;All after fusing, Aluminium alloy cast ingot is cast as using casting machine under the conditions of 690 DEG C;
B, head, milling face are sawed:By aluminium alloy cast ingot two, respectively saw removes 300mm, then carries out milling face, it is desirable to big face one side milling face Amount >=20mm, facet one side milling face amount >=10mm, ingot casting both sides thickness difference≤3mm;
C, the aluminium alloy cast ingot behind milling face is subjected to soaking, heated;
The soaking, the detailed process heated are:Aluminium alloy cast ingot behind milling face is heated using soaking pit Processing, first stage:It is 630 DEG C to control soaking pit furnace gas temperature, and aluminium alloy cast ingot temperature reaches 564 DEG C, protects on this condition Temperature 12 hours;Second stage:Stop heating operation, it is straight after insulation when when aluminium alloy cast ingot temperature is down to 490 DEG C, insulation 6 is small Pick out stove;
D, the aluminium alloy cast ingot after heating is subjected to hot roughing, hot finishing successively;
11 passages of rolling pass during the hot roughing, emulsion pressure are 0.6MPa, concentration 6%, temperature when roughing is completed Degree control is 450 DEG C;Emulsion pressure is 0.6MPa during the hot finishing, concentration 6%, compressed air pressure 0.4MPa, heat Finishing temperature is 330 DEG C after finish rolling, and the thickness of aluminum alloy plate materials is 6.0mm after the completion of hot rolling;
E, O state aluminum alloy coiled materials after step d finish rolling or H32 aluminum alloy coiled materials are subjected to cold rolling;
The detailed process of the O state aluminium sheet cold rolling is:Cold rolling is divided into 4 passages and rolled, the 1st passage aluminium sheet import Thickness is 6.0mm, exit thickness 4.2mm;2nd passage aluminium sheet import thickness is 4.2mm, exit thickness 2.8mm;3rd Secondary aluminium sheet import thickness is 2.8mm, exit thickness 1.5mm;4th passage aluminium sheet import thickness is 1.5mm, and exit thickness is 0.8m;
The detailed process of the H32 states aluminium sheet cold rolling is:Cold rolling is divided into 4 passages and rolled, and the 1st passage aluminium sheet enters Mouth thickness is 6.0mm, exit thickness 4.0mm;2nd passage aluminium sheet import thickness is 4.0mm, exit thickness 2.0mm;3rd Passage aluminium sheet import thickness is 2.0mm, exit thickness 1.15mm;After 3rd passes carry out intermediate annealing (intermediate annealing Detailed process is:Intermediate annealing, 480 DEG C of furnace gas constant temperature, when metal temperature reaches 320~330 DEG C are carried out using nitrogen protection stove Insulation 4 hours, natural cooling of coming out of the stove), the 4th passes are then carried out, the 4th passage aluminium sheet import thickness is 1.15mm, outlet Thickness is 0.8mm;
F, intermediate annealing is carried out to the O state aluminum alloy coiled materials after step e cold rollings (detailed process of intermediate annealing is:Adopt Intermediate annealing, 480 DEG C of furnace gas constant temperature are carried out with nitrogen protection stove, metal temperature is incubated 4 hours when reaching 320~330 DEG C, come out of the stove Natural cooling);H32 state aluminium alloy coiled materials after step e cold rollings are cleaned, stabilization processes (use n 2 annealing stove Heated, furnace gas temperature is 120 DEG C, and 5h is incubated under this temperature conditions, is come out of the stove after insulation);
G, the O state aluminum alloy coiled materials after step f is annealed are cleaned, bundling and packed;After stabilization processes H32 state aluminium alloys coiled material carries out bundling and packed.
Embodiment 6:
The production method of the high-end anodic oxidation aluminium strip of 3C industries described in the embodiment of the present invention 3, the production method it is detailed Thin step is as follows:
A, cast aluminium alloy gold ingot casting:It is first according to dispensing of the 3C industries described in embodiment 3 with high-end anodic oxidation aluminium strip Ratio carries out dispensing, and the various raw materials of preparation are added into melting furnace, melting is carried out under the conditions of 760 DEG C;All after fusing, Aluminium alloy cast ingot is cast as using casting machine under the conditions of 715 DEG C;
B, head, milling face are sawed:By aluminium alloy cast ingot two, respectively saw removes 300mm, then carries out milling face, it is desirable to big face one side milling face Amount >=20mm, facet one side milling face amount >=10mm, ingot casting both sides thickness difference≤3mm;
C, the aluminium alloy cast ingot behind milling face is subjected to soaking, heated;
The soaking, the detailed process heated are:Aluminium alloy cast ingot behind milling face is heated using soaking pit Processing, first stage:It is 630 DEG C to control soaking pit furnace gas temperature, and aluminium alloy cast ingot temperature reaches 575 DEG C, protects on this condition Temperature 8 hours;Second stage:Stop heating operation, when insulation 4 is small when aluminium alloy cast ingot temperature is down to 510 DEG C, after insulation directly Come out of the stove;
D, the aluminium alloy cast ingot after heating is subjected to hot roughing, hot finishing successively;
13 passages of rolling pass during the hot roughing, emulsion pressure are 0.4MPa, concentration 5%, temperature when roughing is completed Degree control is 390 DEG C;Emulsion pressure is 0.4MPa during the hot finishing, concentration 5%, compressed air pressure 0.2MPa, heat Finishing temperature is 310 DEG C after finish rolling, and the thickness of aluminum alloy plate materials is 6.0mm after the completion of hot rolling;
E, O state aluminum alloy coiled materials after step d finish rolling or H32 aluminum alloy coiled materials are subjected to cold rolling;
The detailed process of the O state aluminium sheet cold rolling is:Cold rolling is divided into 4 passages and rolled, the 1st passage aluminium sheet import Thickness is 6.0mm, exit thickness 4.2mm;2nd passage aluminium sheet import thickness is 4.2mm, exit thickness 2.8mm;3rd Secondary aluminium sheet import thickness is 2.8mm, exit thickness 1.5mm;4th passage aluminium sheet import thickness is 1.5mm, and exit thickness is 0.8m;
The detailed process of the H32 states aluminium sheet cold rolling is:Cold rolling is divided into 4 passages and rolled, and the 1st passage aluminium sheet enters Mouth thickness is 6.0mm, exit thickness 4.0mm;2nd passage aluminium sheet import thickness is 4.0mm, exit thickness 2.0mm;3rd Passage aluminium sheet import thickness is 2.0mm, exit thickness 1.15mm;After 3rd passes carry out intermediate annealing (intermediate annealing Detailed process is:Intermediate annealing, 480 DEG C of furnace gas constant temperature, when metal temperature reaches 320~330 DEG C are carried out using nitrogen protection stove Insulation 4 hours, natural cooling of coming out of the stove), the 4th passes are then carried out, the 4th passage aluminium sheet import thickness is 1.15mm, outlet Thickness is 0.8mm;
F, intermediate annealing is carried out to the O state aluminum alloy coiled materials after step e cold rollings (detailed process of intermediate annealing is:Adopt Intermediate annealing, 480 DEG C of furnace gas constant temperature are carried out with nitrogen protection stove, metal temperature is incubated 4 hours when reaching 320~330 DEG C, come out of the stove Natural cooling);H32 state aluminium alloy coiled materials after step e cold rollings are cleaned, stabilization processes (use n 2 annealing stove Heated, furnace gas temperature is 120 DEG C, and 5h is incubated under this temperature conditions, is come out of the stove after insulation);
G, the O state aluminum alloy coiled materials after step f is annealed are cleaned, bundling and packed;After stabilization processes H32 state aluminium alloys coiled material carries out bundling and packed.
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CN107794470B (en) * | 2017-11-18 | 2019-04-05 | 中铝瑞闽股份有限公司 | After a kind of anodization without heterochromatic defect 5 be aluminium plate cold rolling process |
CN108149085B (en) * | 2017-12-14 | 2020-08-28 | 中铝材料应用研究院有限公司 | Aluminum material without annealing treatment and with excellent surface quality and preparation method thereof |
CN108193097A (en) * | 2017-12-29 | 2018-06-22 | 西南铝业(集团)有限责任公司 | A kind of production method of the high surface mobile phone Al-alloy casing of 5 system and aluminium alloy sheet |
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