CN113714285B - Anodic oxidation rolling mirror aluminum plate strip and preparation method thereof - Google Patents
Anodic oxidation rolling mirror aluminum plate strip and preparation method thereof Download PDFInfo
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- CN113714285B CN113714285B CN202111033148.1A CN202111033148A CN113714285B CN 113714285 B CN113714285 B CN 113714285B CN 202111033148 A CN202111033148 A CN 202111033148A CN 113714285 B CN113714285 B CN 113714285B
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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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- 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
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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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- 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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Abstract
The invention relates to an anodic oxidation rolling mirror-surface aluminum plate strip and a preparation method thereof, wherein in the preparation method, a prepared aluminum alloy slab ingot is rolled into a plate, anodic oxidation treatment is carried out, the rolling process comprises a hot rolling process and a cold rolling process, the number of times of single-pass rolling reduction rate in the hot rolling process is more than 40% is not less than 3, and the number of times of single-pass rolling reduction rate in the cold rolling process is more than 40% is not less than 2; during the anodic oxidation treatment, 10% -20% sulfuric acid electrolyte is adopted for fine anodic oxidation treatment, the treatment temperature is 15 ℃ +/-3 ℃, the current density is I less than or equal to 1.4A/dm < 2 >, and the thickness of the formed oxide film is less than or equal to 20 mu m; the diameter of the surface film hole of the prepared mirror aluminum plate strip is smaller than 20nm, and the surface color difference delta E is smaller than 0.25. The invention improves the surface quality of the anodized rolled mirror aluminum and improves the mechanical property of the anodized rolled mirror aluminum, thereby meeting the technical requirements of the anodized mirror aluminum for high-end equipment decoration.
Description
Technical Field
The invention belongs to the field of aluminum alloy materials, and particularly relates to an anodic oxidation rolling mirror aluminum plate strip and a preparation method thereof.
Background
The mirror aluminum material is widely applicable to more than ten industrial fields of high-end equipment, automobiles, lamps, indoor and outdoor decorations and the like, and has huge market application prospect. Meanwhile, the rolled mirror aluminum can replace mechanical and chemical polished mirror aluminum, so that noise and acid-base waste liquid pollution are effectively reduced, energy conservation and emission reduction are facilitated, and the method is highly matched with the development requirements of environmental protection. The surface roughness and glossiness of the current rolled mirror aluminum can not meet the use requirement of high-end equipment decoration, and after anodic oxidation, the surface glossiness of the mirror aluminum is lower, and the defect of color difference exists, so that the preparation method of the anodic oxidation rolled mirror aluminum needs to be optimized to improve the surface quality of products and meet the use requirement of high-end equipment decoration.
Disclosure of Invention
The invention aims to provide an anodic oxidation rolling mirror aluminum plate strip and a preparation method thereof, which improve the surface quality of anodic oxidation rolling mirror aluminum and improve the mechanical property thereof through optimization of alloy components, regulation and control of rolling rate and optimization of anodic oxidation treatment parameters, thereby meeting the technical requirements of anodic oxidation mirror aluminum for high-end equipment decoration.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the preparation method of the anodic oxidation rolling mirror-surface aluminum plate strip comprises the steps of rolling a prepared aluminum alloy slab ingot into a plate, and then performing anodic oxidation treatment, wherein the rolling process comprises a hot rolling process and a cold rolling process, the number of times of single-pass reduction rate in the hot rolling process is more than 40% is not less than 3, and the number of times of single-pass reduction rate in the cold rolling process is more than 40% is not less than 2; during the anodic oxidation treatment, 10% -20% sulfuric acid electrolyte is adopted for fine anodic oxidation treatment, the treatment temperature is 15 ℃ +/-3 ℃, the current density is less than or equal to 1.4A/dm < 2 >, and the thickness of the formed oxide film is less than or equal to 20 mu m.
The alloy raw materials for preparing the aluminum alloy slab ingot comprise the following components in percentage by mass: si is less than 0.10%; fe < 0.10%; cu is less than 0.10%; mn < 0.10%; mg < 0.05%; ti < 0.05%, and the balance Al and unavoidable impurities.
The anodic oxidation rolling mirror aluminum plate strip prepared by the preparation method has the surface film hole diameter smaller than 20nm and the surface color difference delta E smaller than 0.25.
The grains inside the prepared mirror aluminum plate strip are mainly deformed grains, and the average size is smaller than 30 mu m.
The thickness of the prepared mirror aluminum plate strip is 0.1-1.0 mm, the tensile strength is more than or equal to 170MPa, the yield strength is more than or equal to 150MPa, the elongation is more than or equal to 3%, the surface roughness Ra is less than or equal to 0.05 mu m and the Rz is less than or equal to 0.5 mu m, and the mirror effect is shown.
The surface glossiness of the prepared mirror aluminum plate strip before the anodic oxidation treatment is more than or equal to 800GU, and the surface glossiness of the anode after the anodic oxidation treatment is more than or equal to 750GU.
The prepared mirror aluminum plate strip comprises the following components in percentage by mass: si is less than 0.10%; fe < 0.10%; cu is less than 0.10%; mn < 0.10%; mg < 0.05%; ti < 0.05%, and the balance Al and unavoidable impurities.
The beneficial effects of the invention are as follows: according to the preparation method of the anodic oxidation rolled mirror aluminum plate strip and the mirror aluminum plate strip, the transparency of an oxidation film after anodic oxidation is improved by adopting high-purity aluminum alloy components, the grain structure and the oxidation film structure of the mirror aluminum plate are regulated and controlled through optimizing a rolling process and an anodic oxidation process, the high-glossiness anodic oxidation mirror aluminum is prepared, the surface roughness Ra of the prepared mirror aluminum is less than or equal to 0.05 mu m and Rz is less than or equal to 0.5 mu m, the mirror effect is achieved, the glossiness before anodic oxidation treatment is more than or equal to 800GU, the surface glossiness of the anode after anodic oxidation treatment is more than or equal to 750GU, the chromatic aberration delta E is less than 0.25, the technical requirement of high-end equipment decoration on the surface performance of the anodic oxidation mirror aluminum is met, the tensile strength of the prepared mirror aluminum is more than or equal to 170MPa, the yield strength is more than or equal to 3 MPa, and the technical requirement of the high-end equipment decoration on the mechanical performance of the anodic oxidation mirror aluminum can also be met.
Drawings
FIG. 1 shows the grain morphology and distribution of a mirror-surface aluminum sheet strip prepared in accordance with the present invention.
FIG. 2 shows the pore size morphology and distribution of the anodic oxide film of the mirror aluminum plate strip prepared by the invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples, which are not intended to be limiting.
Example 1: the anodized rolled mirror aluminum plate strip comprises the following components in percentage by mass: si=0.08%; fe=0.05%; cu=0.01%; mn=0.01%; mg=0.02%: ti=0.02%, and the balance Al and unavoidable impurities.
The preparation method of the mirror aluminum plate strip comprises the following steps: firstly, alloy raw materials for casting ingots are designed according to components of finished mirror-surface aluminum plates and strips, then smelting and semi-continuous casting are adopted to prepare flat ingots, hot rolling and cold rolling are sequentially carried out, wherein the number of times of hot rolling single pass reduction rate is more than 40% is 3, the number of times of cold rolling single pass reduction rate is more than 40% is 4, and finally anodic oxidation treatment is carried out, and the conditions are as follows: sulfuric acid concentration was 18%, current density i=1.0A/dm 2 The method comprises the steps of carrying out a first treatment on the surface of the The thickness of the oxidized film after anodic oxidation is 3-5 μm.
The mirror aluminum prepared by the method is detected, the grain structure and anodic oxide film structure in the mirror aluminum are shown in figures 1 and 2, the tensile strength is 177MPa, the yield strength is 165MPa, and the elongation is 3.5%; the surface roughness Ra=0.013 μm and Rz is less than or equal to 0.361 μm, the mirror effect is shown, and the glossiness is 840GU before the anodic oxidation treatment; the glossiness 790GU of the anode surface after anodic oxidation, and the chromatic aberration deltaE=0.07 meet the technical requirements of the tensile property and the surface quality of the anodic oxidation mirror aluminum.
Example 2: the anodized rolled mirror aluminum plate strip comprises the following components in percentage by mass: si=0.05%; fe=0.04%; cu=0.05%; mn=0.03%; mg=0.03%: ti=0.01%, and the balance Al and unavoidable impurities.
The preparation method of the mirror aluminum plate strip comprises the following steps: firstly, alloy raw materials for casting ingots are designed according to components of finished mirror-surface aluminum plates and strips, then smelting and semi-continuous casting are adopted to prepare flat ingots, hot rolling and cold rolling are sequentially carried out, wherein the number of times of hot rolling single pass reduction rate is more than 40% is 3, the number of times of cold rolling single pass reduction rate is more than 40% is 4, and finally anodic oxidation treatment is carried out, and the conditions are as follows: sulfuric acidConcentration is 12%, current density i=1.2A/dm 2 The method comprises the steps of carrying out a first treatment on the surface of the The thickness of the oxidized film after anodic oxidation is 3-5 μm.
The mirror aluminum prepared by the method has the tensile strength of 187MPa, the yield strength of 177MPa and the elongation of 3.2 percent; the surface roughness Ra=0.014 mu m and Rz is less than or equal to 0.354 mu m, the mirror effect is shown, and the glossiness is 810GU before the anodic oxidation treatment; the surface glossiness 760GU of the anodized anode, and the chromatic aberration deltaE=0.05 meet the technical requirements of the tensile property and the surface quality of the anodized mirror-like aluminum.
Comparative example 1: the alloy raw materials comprise the following components in percentage by mass: si=0.08%; fe=0.05%; cu=0.01%; mn=0.01%; mg=0.02%; ti=0.10% and the balance Al and unavoidable impurities; then in the hot rolling process, the number of times of single pass reduction rate more than 40% is 2, and the number of times of cold rolling single pass reduction rate more than 40% is 1; finally, anodic oxidation treatment is carried out, and the conditions are as follows: sulfuric acid concentration was 18%, current density i=1.0A/dm 2 The method comprises the steps of carrying out a first treatment on the surface of the The thickness of the oxidized film after anodic oxidation is 3-5 μm.
Through detection, the tensile strength of the mirror aluminum prepared by the method is 175MPa, the yield strength is 162MPa, and the elongation is 3.5%; the surface roughness Ra=0.013 mu m and Rz is less than or equal to 0.361 mu m, the glossiness is 840GU before the anodic oxidation treatment, the anode surface glossiness 790GU after the anodic oxidation treatment, and the chromatic aberration DeltaE=0.38 is more than 0.25, the material surface heterochromatic defect can not be overcome, and the technical requirement of the surface quality of the anodic oxidation mirror aluminum can not be met.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and it should be understood by those skilled in the art that modifications and equivalents may be made to the specific embodiments of the present invention with reference to the above embodiments, and any modifications and equivalents not departing from the spirit and scope of the present invention are within the scope of the claims appended hereto.
Claims (6)
1. The preparation method of the anodic oxidation rolling mirror aluminum plate strip is characterized in that the prepared aluminum alloy slab ingot is rolled into a plate, and then anodic oxidation treatment is carried out, and the preparation method is characterized in that: the rolling process comprises a hot rolling process and a cold rolling process, wherein the number of times of single-pass reduction rate of more than 40% in the hot rolling process is not less than 3, and the number of times of single-pass reduction rate of more than 40% in the cold rolling process is not less than 2; during the anodic oxidation treatment, 10% -20% sulfuric acid electrolyte is adopted for fine anodic oxidation treatment, the treatment temperature is 15 ℃ +/-3 ℃, the current density is I less than or equal to 1.4A/dm < 2 >, and the thickness of the formed oxide film is less than or equal to 20 mu m;
the alloy raw materials for preparing the aluminum alloy slab ingot comprise the following components in percentage by mass: si is less than 0.10%; fe < 0.10%; cu is less than 0.10%; mn < 0.10%; mg < 0.05%; ti < 0.05%, and the balance Al and unavoidable impurities.
2. An anodized rolled mirror-finished aluminum sheet strip produced by the production method of claim 1, characterized by: the diameter of the surface film hole of the prepared mirror aluminum plate strip is smaller than 20nm, and the surface color difference delta E is smaller than 0.25.
3. A specular aluminum sheet strip according to claim 2, wherein: the grains inside the prepared mirror aluminum plate strip are mainly deformed grains, and the average size is smaller than 30 mu m.
4. A specular aluminum sheet strip according to claim 2, wherein: the thickness of the prepared mirror aluminum plate strip is 0.1-1.0 mm, the tensile strength is more than or equal to 170MPa, the yield strength is more than or equal to 150MPa, the elongation is more than or equal to 3%, the surface roughness Ra is less than or equal to 0.05 mu m and the Rz is less than or equal to 0.5 mu m, and the mirror effect is shown.
5. A specular aluminum sheet strip in accordance with claim 4 wherein: the surface glossiness of the prepared mirror aluminum plate strip before the anodic oxidation treatment is more than or equal to 800GU, and the surface glossiness of the anode after the anodic oxidation treatment is more than or equal to 750GU.
6. A specular aluminum sheet strip according to claim 2, wherein: the prepared mirror aluminum plate strip comprises the following components in percentage by mass: si is less than 0.10%; fe < 0.10%; cu is less than 0.10%; mn < 0.10%; mg < 0.05%; ti < 0.05%, and the balance Al and unavoidable impurities.
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| CN114540913A (en) * | 2022-02-16 | 2022-05-27 | 中铝河南洛阳铝加工有限公司 | Surface treatment method of high-glossiness anodized mirror aluminum |
| CN115109970B (en) * | 2022-08-26 | 2022-12-09 | 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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| CN107190184A (en) * | 2017-07-06 | 2017-09-22 | 中铝瑞闽股份有限公司 | A kind of mirror-like anodic oxidation Aluminum Plate and Strip and preparation method thereof |
| CN113106308A (en) * | 2021-03-04 | 2021-07-13 | 中铝材料应用研究院有限公司 | Fine-grain homogeneous mirror-surface aluminum alloy rolled plate strip and preparation method thereof |
| CN113106307A (en) * | 2021-03-04 | 2021-07-13 | 中铝材料应用研究院有限公司 | Mirror-surface aluminum alloy plate strip and preparation method thereof |
| CN114107752A (en) * | 2021-12-15 | 2022-03-01 | 中铝河南洛阳铝加工有限公司 | high-Cr aluminum alloy plate strip for anodic oxidation and preparation method thereof |
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| US20150240339A1 (en) * | 2014-02-25 | 2015-08-27 | Ford Global Technologies, Llc | Tailored rolling of high strength aluminum |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107190184A (en) * | 2017-07-06 | 2017-09-22 | 中铝瑞闽股份有限公司 | A kind of mirror-like anodic oxidation Aluminum Plate and Strip and preparation method thereof |
| CN113106308A (en) * | 2021-03-04 | 2021-07-13 | 中铝材料应用研究院有限公司 | Fine-grain homogeneous mirror-surface aluminum alloy rolled plate strip and preparation method thereof |
| CN113106307A (en) * | 2021-03-04 | 2021-07-13 | 中铝材料应用研究院有限公司 | Mirror-surface aluminum alloy plate strip and preparation method thereof |
| CN114107752A (en) * | 2021-12-15 | 2022-03-01 | 中铝河南洛阳铝加工有限公司 | high-Cr aluminum alloy plate strip for anodic oxidation and preparation method thereof |
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