CN113106307A - Mirror-surface aluminum alloy plate strip and preparation method thereof - Google Patents
Mirror-surface aluminum alloy plate strip and preparation method thereof Download PDFInfo
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- CN113106307A CN113106307A CN202110238508.5A CN202110238508A CN113106307A CN 113106307 A CN113106307 A CN 113106307A CN 202110238508 A CN202110238508 A CN 202110238508A CN 113106307 A CN113106307 A CN 113106307A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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- 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
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
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Abstract
The invention discloses a mirror aluminum alloy plate strip, which comprises the following components in percentage by mass: less than or equal to 0.4 percent of Si, less than or equal to 0.8 percent of Fe, less than or equal to 0.2 percent of Cu, less than or equal to 0.2 percent of Mn, less than or equal to 0.5 percent of Zn, 0.2 to 2.0 percent of Mg, less than or equal to 0.01 percent of the total of other impurity elements and the balance of Al. The preparation method of the mirror aluminum alloy plate strip comprises the following steps: carrying out semi-continuous casting and homogenization heat treatment on the mirror aluminum alloy cast ingot, and then carrying out hot rolling to obtain a hot rolled plate strip with the thickness of 3.0-6.0 mm; cold rolling the hot rolled plate strip to obtain a cold rolled plate strip; mirror rolling and annealing the cold-rolled plate strip to obtain a mirror aluminum alloy plate strip; the mirror surface rolling cold rolling rate is more than or equal to 40 percent, and the annealing treatment temperature is 160-240 ℃. The oxide layer formed by the mirror aluminum alloy plate strip after the anodic oxidation treatment has uniform luster and no heterochrosis defect.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy, and particularly relates to a mirror-surface aluminum alloy plate strip and a preparation method thereof.
Background
The rolled mirror aluminum is an aluminum plate with high reflectivity and mirror surface effect on the surface by rolling technology, and is widely applied to appearance structural members of various high-grade civil products, such as decorative fields of car logos, car light reflectors, instrument panels and the like. The high-grade mirror aluminum can make the surface of a product smooth and bright, add fashionable artistic feeling and technological feeling, meet the aesthetic requirements of people, and be widely applied abroad, but is still in the primary stage in China and has great development space. In recent years, the market competition of passenger cars is becoming more intense, the beautiful appearance of the cars becomes an important means for various car enterprises to attract consumers and increase sales, and the demand for mirror aluminum for the interior and exterior decoration of the cars is increasing.
The requirement of the rolled mirror aluminum product on the surface quality is extremely high, and particularly, the mirror aluminum for oxidation treatment has various processes, many influencing factors influencing the surface quality of the product and great technical difficulty. The quality of the product is affected by various procedures and technologies of the mirror aluminum plate strip for oxidation treatment: the casting process has no segregation, homogeneous structure and small size. ② the soaking process avoids Mg segregation and oxidation. The hot rolling process is a core control link, namely the initial rolling temperature, the final rolling temperature, the rolling speed and the cooling speed. Fourthly, the first time influence in the cold rolling is larger. And fifthly, adjusting and controlling the brightness and the hardness of the mirror surface by an intermediate annealing process. Sixthly, the convexity, the roughness and the rolling speed of the roller subjected to mirror rolling. And (c) cleaning. Aluminum powder on the surface of the aluminum material is cleaned, and the reflectivity is reduced less after cleaning. Eighthly, anodizing to ensure high brightness: the anode current density is low, the temperature is as low as possible, and the time is short.
In the beginning of this century, four manufacturers of Germany Anhui, Japan Sumitomo, Italy aluminum industry and Austria aluminum industry successively successfully produced rolling mirror surface aluminum products, and rapidly monopolized the global market. The preparation process of the mirror aluminum for anodic oxidation gets rid of a mechanical polishing method and is upgraded to a rolling method, and the cost advantage is obvious. The rolling mill in the prior art can only be used for producing common aluminum plates and can not directly produce mirror-surface aluminum plates because the roughness of the working rolls on the rolling mill is not low enough. The working roll of the mirror aluminum plate must be a mirror roll, and for the processing of the surface of the mirror roll, the roughness of the roll can only be ground to 0.02 μm on a grinding machine. The roughness of the roller is then reduced to below 0.01 μm by a polishing machine to meet the requirements for rolling mirror aluminum sheet.
Compared with imported mirror aluminum, domestic mirror aluminum has differences in the following three aspects: the surface reflectivity (80-85%) of the domestic mirror surface aluminum material after anodic oxidation is lower than that of imported materials (the reflectivity is more than or equal to 90%) because a large amount of coarse second phases exist in the aluminum material and the degree of order of an oxide film is lower; secondly, the surface of domestic mirror aluminum after anodic oxidation has the defects of color difference and shading because the grain size and orientation distribution in the aluminum are not uniform; and thirdly, after the mirror surface aluminum is formed, the surface of the mirror surface aluminum has the defects of orange peel and the like because of the existence of coarse grains in the aluminum material. Therefore, it is desirable to provide a specular aluminum sheet having no surface discoloration defects after anodizing.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a mirror surface aluminum alloy plate strip and a preparation method thereof.
The invention adopts the following technical scheme:
the mirror surface aluminum alloy plate strip is characterized by comprising the following components in percentage by mass: less than or equal to 0.4 percent of Si, less than or equal to 0.8 percent of Fe, less than or equal to 0.2 percent of Cu, less than or equal to 0.2 percent of Mn, less than or equal to 0.5 percent of Zn, 0.2 to 2.0 percent of Mg, less than or equal to 0.01 percent of the total of other impurity elements and the balance of Al.
The preparation method of the mirror surface aluminum alloy plate strip is characterized by comprising the following steps:
(1) carrying out semi-continuous casting and homogenization heat treatment on the mirror aluminum alloy cast ingot, and then carrying out hot rolling to obtain a hot rolled plate strip with the thickness of 3.0-6.0 mm; the hot rolling finishing temperature is 180-260 ℃;
(2) cold rolling the hot rolled plate strip to obtain a cold rolled plate strip with the thickness of 2.0-4.0 mm;
(3) mirror rolling and annealing the cold-rolled plate strip to obtain a mirror aluminum alloy plate strip; the mirror surface rolling cold rolling rate is more than or equal to 40 percent, and the annealing treatment temperature is 160-240 ℃.
The preparation method of the mirror aluminum alloy plate strip is characterized in that the roughness of a cold rolling roller for cold rolling the hot rolled plate strip in the step (2) is less than or equal to 0.2 mu m.
The preparation method of the mirror-surface aluminum alloy plate strip is characterized in that the surface roughness of a mirror-surface roller for mirror-surface rolling the cold-rolled plate strip in the step (3) is less than or equal to 0.01 mu m.
The preparation method of the mirror surface aluminum alloy plate strip is characterized in that the surface gloss of the mirror surface aluminum alloy plate strip in the step (3) is more than or equal to 650 GU.
The preparation method of the mirror surface aluminum alloy plate strip is characterized in that the surface roughness of the mirror surface aluminum alloy plate strip in the step (3) is less than or equal to 0.05 mu m.
The preparation method of the mirror surface aluminum alloy plate strip is characterized in that the area ratio of recrystallized grains in the metal structure of the mirror surface aluminum alloy plate strip in the step (3) is less than or equal to 10 percent, and the grains of the mirror surface aluminum alloy plate strip are distributed along the rolling direction.
The preparation method of the mirror surface aluminum alloy plate strip is characterized in that the area ratio of the recrystallized cubic texture in the metal structure of the mirror surface aluminum alloy plate strip in the step (3) is less than or equal to 1.0%.
The invention has the beneficial technical effects that: compared with the prior art, the grain appearance in the metal structure of the heterogeneous mirror surface aluminum alloy plate strip is mainly strip-shaped unrecrystallized grains, the grain orientation is mainly rolling texture, the area ratio of the recrystallized cubic texture is small, and an oxide layer formed after anodic oxidation treatment has uniform luster and no heterochromatic defect. According to the method, the appearance, size and orientation distribution of crystal grains in the aluminum material are regulated and controlled through hot rolling and cold rolling processes, the surface quality of the mirror surface aluminum alloy plate strip is excellent after anodic oxidation treatment, intermediate annealing is not needed in the preparation process, the production efficiency of the mirror surface aluminum is improved, and the production cost is reduced. The invention has the advantages of high preparation efficiency, less working procedures and low cost.
Drawings
FIG. 1 is a graph of the distribution of grain size and typical texture in a strip of mirror aluminum alloy plate of example 1;
FIG. 2 is a graph of the distribution of grain size and typical texture in the strip of mirror aluminum alloy plate of example 2;
FIG. 3 is a graph of the grain size and typical texture distribution in the finished strip of comparative example 1.
Detailed Description
The invention relates to a mirror aluminum alloy plate strip, which comprises the following components in percentage by mass: less than or equal to 0.4 percent of Si, less than or equal to 0.8 percent of Fe, less than or equal to 0.2 percent of Cu, less than or equal to 0.2 percent of Mn, less than or equal to 0.5 percent of Zn, 0.2 to 2.0 percent of Mg, less than or equal to 0.01 percent of the total of other impurity elements and the balance of Al.
The preparation method of the mirror aluminum alloy plate strip comprises the following steps:
(1) carrying out semi-continuous casting and homogenization heat treatment on the mirror aluminum alloy cast ingot, and then carrying out hot rolling to obtain a hot rolled plate strip with the thickness of 3.0-6.0 mm; the hot rolling finishing temperature is 180-260 ℃; the roughness of a cold rolling roller for cold rolling the hot rolled plate strip is less than or equal to 0.2 mu m.
(2) Cold rolling the hot rolled plate strip to obtain a cold rolled plate strip with the thickness of 2.0-4.0 mm;
(3) mirror rolling and annealing the cold-rolled plate strip to obtain a non-homogeneous mirror aluminum alloy plate strip with the thickness of 0.2-3.0 mm and excellent surface quality; the typical thickness of the plate strip of the mirror aluminum alloy is 0.2-3.0 mm. The mirror surface rolling cold rolling rate is more than or equal to 40 percent, and the annealing treatment temperature is 160-240 ℃. The surface roughness of a mirror roller for mirror rolling the cold-rolled plate strip is less than or equal to 0.01 mu m. The surface glossiness of the mirror aluminum alloy plate strip is more than or equal to 650 GU. The surface roughness Ra of the mirror aluminum alloy plate strip is less than or equal to 0.05 mu m. The metal structure of the mirror aluminum alloy plate strip is mainly strip-shaped deformed grains, the area ratio of recrystallized grains is less than or equal to 10%, preferably, the metal structure of the mirror aluminum alloy plate strip is mainly strip-shaped deformed grains, and the area ratio of recrystallized grains is less than or equal to 5%. The crystal grains of the mirror aluminum alloy plate strip are distributed along the rolling direction, the crystal grain orientation is mainly based on the rolling texture, the area percentage of the recrystallized Cube texture is less than or equal to 1.0 percent, and the area percentage of the recrystallized Cube texture in the metal structure of the mirror aluminum alloy plate strip is less than or equal to 1.0 percent. The mirror surface aluminum alloy plate strip is bent, formed, polished and anodized to prepare a part, the surface gloss of the prepared part is more than or equal to 600GU, the surface gloss is uniform, and the surface color difference delta E is less than 0.25. The treatment before the anodic oxidation includes a planarization treatment by one or more methods selected from cutting, grinding wheel polishing, electrolytic polishing, and chemical polishing. The anodic oxidation treatment comprises: electrolyzing at 0-50 deg.C in 10-25% sulfuric acid solution at 1.2-1.8A/dm2The aluminum material is subjected to constant current treatment for 20-40 min at a current density, and an oxide film with the thickness of 3-30 mu m is coated on the surface of the obtained aluminum material.
The technical solution of the present invention is further illustrated by the following specific examples.
Example 1
The mirror aluminum alloy comprises the following components in percentage by mass: less than or equal to 0.4 percent of Si, less than or equal to 0.8 percent of Fe, less than or equal to 0.2 percent of Cu, less than or equal to 0.2 percent of Mn, less than or equal to 0.5 percent of Zn, 0.9 percent of Mg, less than or equal to 0.01 percent of the sum of other impurity elements and the balance of Al.
Carrying out semi-continuous casting and homogenization heat treatment on the mirror aluminum alloy cast ingot, and then carrying out hot rolling to obtain a hot rolled plate strip with the thickness of 5 mm; the hot rolling finishing temperature is 240 ℃.
The hot rolled sheet strip was cold rolled to obtain a cold rolled sheet strip having a thickness of 3 mm.
And performing mirror rolling and annealing treatment on the cold-rolled plate strip to obtain the heterogeneous mirror aluminum alloy plate strip with the thickness of 1.2mm and excellent surface quality, wherein the mirror rolling cold rolling rate is 50%, and the annealing treatment temperature is 180 ℃. The surface roughness Ra of the mirror-rolled roll obtained by mirror-rolling the cold-rolled sheet or strip was 0.01 μm. The surface gloss of the mirror aluminum alloy plate strip is 672 GU. The surface roughness Ra of the mirror surface aluminum alloy plate strip is 0.01 mu m, the strip-shaped deformation crystal grains in the metal structure of the mirror surface aluminum alloy plate strip are mainly, the area proportion of the recrystallization crystal grains is 5 percent, and the area proportion of the recrystallization Cube texture of the mirror surface aluminum alloy plate strip is 0.2 percent. Bending and forming a mirror surface aluminum alloy plate strip, chemically polishing and anodizing to prepare a part, wherein the anodizing comprises the following steps: electrolyzing at 20 deg.C in 18% sulfuric acid solution at 1.4A/dm2Current density constant current treatment of (2) for 30 min. The surface oxide film thickness of the mirror aluminum alloy plate strip is 8.8 μm, the surface color difference delta E is 0.16, and the glossiness is uniformly distributed. FIG. 1 is a graph showing the distribution of grain size and typical texture in the strip of mirror aluminum alloy plate of example 1.
Example 2
The mirror aluminum alloy comprises the following components in percentage by mass: less than or equal to 0.4 percent of Si, less than or equal to 0.8 percent of Fe, less than or equal to 0.2 percent of Cu, less than or equal to 0.2 percent of Mn, less than or equal to 0.5 percent of Zn, 1.1 percent of Mg, less than or equal to 0.01 percent of the sum of other impurity elements and the balance of Al.
Carrying out semi-continuous casting and homogenization heat treatment on the mirror aluminum alloy cast ingot, and then carrying out hot rolling to obtain a hot rolled plate strip with the thickness of 4 mm; the hot rolling finishing temperature is 250 ℃.
The hot rolled sheet strip was cold rolled to obtain a cold rolled sheet strip having a thickness of 4 mm.
The cold-rolled sheet strip was subjected to mirror rolling and annealing to obtain a sheet strip having a thickness of 2.0mm and excellent surface qualityThe mirror surface rolling cold rolling rate of the homogeneous mirror surface aluminum alloy plate strip is 50%, and the annealing treatment temperature is 220 ℃. The surface roughness Ra of the mirror-rolled roll obtained by mirror-rolling the cold-rolled sheet or strip was 0.01 μm. The surface gloss of the specular aluminum alloy sheet strip was 665 GU. The surface roughness Ra of the mirror surface aluminum alloy plate strip is 0.01 mu m, the metal structure of the mirror surface aluminum alloy plate strip is mainly strip-shaped deformation crystal grains, the area proportion of recrystallization crystal grains is 3 percent, and the area proportion of the recrystallization Cube texture of the mirror surface aluminum alloy plate strip is 0.3 percent. Bending and forming a mirror surface aluminum alloy plate strip, chemically polishing and anodizing to prepare a part, wherein the anodizing comprises the following steps: electrolyzing at 20 deg.C in 18% sulfuric acid solution at 1.4A/dm2Current density constant current treatment of (2) for 30 min. The surface oxide film thickness of the mirror aluminum alloy plate strip is 5.2 μm, the surface color difference delta E is 0.13, and the glossiness is uniformly distributed. FIG. 2 is a graph of the distribution of grain size and typical texture in the strip of mirror aluminum alloy plate of example 2.
Comparative example 1
The mirror aluminum alloy comprises the following components in percentage by mass: less than or equal to 0.4 percent of Si, less than or equal to 0.8 percent of Fe, less than or equal to 0.2 percent of Cu, less than or equal to 0.2 percent of Mn, less than or equal to 0.5 percent of Zn, 1.2 percent of Mg, less than or equal to 0.01 percent of the sum of other impurity elements and the balance of Al.
Carrying out semi-continuous casting and homogenization heat treatment on the mirror aluminum alloy cast ingot, and then carrying out hot rolling to obtain a hot rolled plate strip with the thickness of 5 mm; the hot rolling finishing temperature is 270 ℃.
The hot rolled sheet strip was cold rolled to obtain a cold rolled sheet strip having a thickness of 3 mm.
And performing mirror rolling and annealing treatment on the cold-rolled plate strip to obtain a finished plate strip with the thickness of 0.8mm, wherein the surface gloss of the finished plate strip is 665 GU. The surface roughness Ra of the finished plate strip is 0.04 mu m. The elongated deformed crystal grains and the isometric crystals in the finished plate and strip are mixed, the area proportion of the recrystallized crystal grains is 17 percent, and the area proportion of the recrystallized Cube texture in the finished plate and strip is 2.7 percent. Bending and forming, chemically polishing and anodizing the finished plate strip to prepare a part, wherein the anodizing comprises the following steps: electrolyzing at 20 deg.C in 18% sulfuric acid solution, and collecting the cells with 1.4A-dm2Current density constant current treatment of (2) for 30 min. The thickness of the oxide film on the surface of the finished plate strip is 5.4 μm, the color difference Delta E on the surface is 0.52, the glossiness distribution is uneven, and the surface has heterochromatic defects. FIG. 3 is a graph of the grain size and typical texture distribution in the finished strip of comparative example 1.
Testing the surface texture of the aluminum material: cutting the aluminum material before anodic oxidation in examples 1 and 2 and comparative example 1 into small squares of 8mm × 8mm, and subjecting the cut aluminum material to an electrolytic polishing treatment with a mixed solution of perchloric acid and ethanol at a voltage of 20V for 40 s; the samples were then examined using an EBSD apparatus. And continuously shooting 5 EBSD pictures along the processing direction under the condition of 100 times of magnification, counting the distribution condition of each texture component on the surface of the aluminum material, and taking an average value. The statistical results of the distribution of the texture components are shown in table 1.
Evaluation of aluminum material surface: observing the surface heterochrosis of the anodized aluminum material prepared by the invention under a D65 light source, and determining the anodizing effect of the aluminum material according to grades according to whether the surface has heterochrosis stripe patterns and the number of the heterochrosis stripe patterns: the grade A is that the surface of the aluminum material almost has no heterochrosis stripes; the B level is that the surface of the aluminum material has less heterochrosis stripe patterns; the C level is that the surface of the aluminum material has more different color stripe patterns; the D grade is that the surface of the aluminum material has a plurality of different color stripe patterns. Wherein, the A grade and the B grade are judged to be qualified products; grades C and D are off-spec products and the test results are listed in table 1 below.
TABLE 1 distribution of grain structure and surface quality grade of mirror aluminum
The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and it should be understood by those skilled in the art that the technical solution of the present invention can be modified or substituted with equivalents by referring to the above embodiments without departing from the scope of the present invention.
Claims (8)
1. The mirror surface aluminum alloy plate strip is characterized by comprising the following components in percentage by mass: less than or equal to 0.4 percent of Si, less than or equal to 0.8 percent of Fe, less than or equal to 0.2 percent of Cu, less than or equal to 0.2 percent of Mn, less than or equal to 0.5 percent of Zn, 0.2 to 2.0 percent of Mg, less than or equal to 0.01 percent of the total of other impurity elements and the balance of Al.
2. A production method of a mirror-surface aluminum alloy plate strip according to claim 1, characterized by comprising the steps of:
(1) carrying out semi-continuous casting and homogenization heat treatment on the mirror aluminum alloy cast ingot, and then carrying out hot rolling to obtain a hot rolled plate strip with the thickness of 3.0-6.0 mm; the hot rolling finishing temperature is 180-260 ℃;
(2) cold rolling the hot rolled plate strip to obtain a cold rolled plate strip with the thickness of 2.0-4.0 mm;
(3) mirror rolling and annealing the cold-rolled plate strip to obtain a mirror aluminum alloy plate strip; the mirror surface rolling cold rolling rate is more than or equal to 40 percent, and the annealing treatment temperature is 160-240 ℃.
3. The production method of a mirror-surface aluminum alloy plate strip as claimed in claim 2, wherein the hot-rolled plate strip is cold-rolled in step (2) to have a cold-rolling roll roughness of 0.2 μm or less.
4. The production method of a mirror-surface aluminum alloy plate strip as claimed in claim 2, wherein the mirror-surface roll surface roughness of mirror-surface rolling the cold-rolled plate strip in step (3) is not more than 0.01. mu.m.
5. The method for producing a mirror-surface aluminum alloy plate strip as claimed in claim 2, wherein the surface gloss of the mirror-surface aluminum alloy plate strip in the step (3) is not less than 650 GU.
6. The method of claim 2, wherein the surface roughness of the mirror aluminum alloy plate strip in the step (3) is not more than 0.05 μm.
7. The production method of a mirror-surface aluminum alloy plate strip as claimed in claim 2, wherein the recrystallized grain area ratio in the metal structure of the mirror-surface aluminum alloy plate strip in the step (3) is not more than 10%, and the grains of the mirror-surface aluminum alloy plate strip are distributed along the rolling direction.
8. The method for producing a mirror-surface aluminum alloy plate strip as claimed in claim 2, wherein the area ratio of the recrystallized cubic texture in the metal structure of the mirror-surface aluminum alloy plate strip in the step (3) is not more than 1.0%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113528905A (en) * | 2021-07-20 | 2021-10-22 | 中铝瑞闽股份有限公司 | Deep-drawing 6-series mirror surface anodized aluminum plate strip and preparation method thereof |
| CN113714285A (en) * | 2021-09-03 | 2021-11-30 | 中铝河南洛阳铝加工有限公司 | Anodized rolled mirror-surface aluminum plate strip and preparation method thereof |
| CN115109970A (en) * | 2022-08-26 | 2022-09-27 | 中铝材料应用研究院有限公司 | Hot rolled plate for mirror aluminum, preparation method of hot rolled plate and preparation method of parts containing hot rolled plate |
| EP4253585A1 (en) * | 2022-03-29 | 2023-10-04 | AMAG rolling GmbH | Method of manufacturing sheet metal or strip and sheet or tape made therefrom |
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| EP4253585A1 (en) * | 2022-03-29 | 2023-10-04 | AMAG rolling GmbH | Method of manufacturing sheet metal or strip and sheet or tape made therefrom |
| WO2023187019A1 (en) * | 2022-03-29 | 2023-10-05 | Amag Rolling Gmbh | Method for producing a metal sheet or strip and a metal sheet or strip produced using same |
| CN115109970A (en) * | 2022-08-26 | 2022-09-27 | 中铝材料应用研究院有限公司 | Hot rolled plate for mirror aluminum, preparation method of hot rolled plate and preparation method of parts containing hot rolled plate |
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