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Aluminium plate strip material for mirror plane shaped anode oxidization and preparation method thereof

An anodizing and aluminum plate technology, which is applied in the field of mirror-like anodizing aluminum plate and strip and its preparation, can solve the problems of uniform thickness, uneven metal shell, and the interface between the aluminum substrate and the anodized film cannot be straight, and achieves uniform thickness. , the effect of flat interface

Active Publication Date: 2017-09-22
CHINALCO RUIMIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the traditional 5-series alloy is anodized, complex and disordered hexagonal columnar micropores will be formed on the anodized layer, and the growth thickness will be uneven, so that the anode surface of the metal shell will be uneven, and the surface roughness Larger, in the case of different light refraction angles, the mirror effect cannot be obtained when viewed with the naked eye
[0003] So far, there have been few studies on the mirror effect of anodized aluminum, and it is proposed to optimize the area of ​​anodized aluminum by controlling the compound in the aluminum base and the grain size of the final rolling. The uniformity of the oxide film is relatively high, but even so, good regional heterochromia cannot make the interface between the aluminum substrate and the anodized film straight, nor can the hexagonal columns of the anodized film formed on this interface be highly ordered, The thickness is uniform, so that the surface of the product cannot show a mirror effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An aluminum plate and strip for mirror-like anodic oxidation, which contains the following components by weight percentage: 0.024% Si, 0.025% Fe, 0.05% Cu, 0.07% Mn, 4.5% Mg, 0.18% Zn, 0.05% Zr, Ti 0.023%, the balance is Al and unavoidable impurities.

[0027] Its preparation method comprises the following steps:

[0028] (1) Aluminum ingots, aluminum intermediate alloy ingots, and magnesium ingots are melted in a smelting furnace for batching, and then cast ingots are made by low-level semi-continuous casting;

[0029] (2) Send the ingot into the heating furnace after sawing and milling, raise the temperature to 440°C at a rate of ≤20°C / h, keep it for 40h, then quickly raise the temperature to 550°C, keep it for 1h, and then cool it down to 480°C. Hot rolled out of the furnace, the finishing temperature of hot rolling is 350°C, and the thickness of hot rolling is 8.0mm;

[0030] (3) The hot-rolled coil is subjected to 60% cold rolling, and then the temperature is rai...

Embodiment 2

[0033]An aluminum plate and strip for mirror-like anodic oxidation, which contains the following components by weight percentage: 0.02% Si, 0.02% Fe, 0.03% Cu, 0.06% Mn, 4.0% Mg, 0.16% Zn, 0.06% Zr, Ti 0.025%, the balance is Al and unavoidable impurities.

[0034] Its preparation method comprises the following steps:

[0035] (1) Aluminum ingots, aluminum intermediate alloy ingots, and magnesium ingots are melted in a smelting furnace for batching, and then cast ingots are made by low-level semi-continuous casting;

[0036] (2) Send the ingot into the heating furnace after sawing and milling, raise the temperature to 440°C at a rate of ≤20°C / h, keep it for 20h, then quickly raise the temperature to 540°C, keep it for 3h, and then cool it down to 460°C. Hot rolled out of the furnace, the finishing temperature of hot rolling is 300°C, and the thickness of hot rolling is 3.0mm;

[0037] (3) The hot-rolled coil is subjected to 80% cold rolling, and then the temperature is raised...

Embodiment 3

[0040] An aluminum plate and strip for mirror-like anodic oxidation, which contains the following components by weight percentage: 0.027% Si, 0.027% Fe, 0.08% Cu, 0.1% Mn, 5.0% Mg, 0.25% Zn, 0.08% Zr, Ti 0.028%, the balance is Al and unavoidable impurities.

[0041] Its preparation method comprises the following steps:

[0042] (1) Aluminum ingots, aluminum intermediate alloy ingots, and magnesium ingots are melted in a smelting furnace for batching, and then cast ingots are made by low-level semi-continuous casting;

[0043] (1) Send the ingot into the heating furnace after sawing and milling, raise the temperature to 450°C at a rate of ≤20°C / h, keep it for 16 hours, then quickly raise the temperature to 530°C, keep it for 12 hours, and then cool it down to 450°C. Hot rolled out of the furnace, the finishing temperature of hot rolling is 250°C, and the thickness of hot rolling is 10.0mm;

[0044] (3) The hot-rolled coil is subjected to 50% cold rolling, and then the tempera...

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Abstract

The invention discloses an aluminium plate strip material for mirror plane shaped anode oxidization and a preparation method thereof. The aluminium plate strip material comprises the following components in percentage by weight: equal to or less than 0.03% of Si, equal to or less than 0.03% of Fe, 0.03-0.08% of Cu, 0.06-0.1% of Mn, 4.0-5.0% of Mg, 0.16-0.25% of Zn, 0.05-0.08% of Zr, 0.02-0.03% of Ti and the balance of Al and unavoidable impurities. The aluminium plate strip material is prepared through the following steps: taking aluminium ingot, aluminium intermediate alloy ingot and magnesium ingot as raw materials, and carrying out fusion casting, hot rolling, cold rolling, thermal treatment and the like on the raw materials. After anode oxidization, a high reflective rate mirror plane effect can be realized when slight mechanical polishing is carried out on the aluminium plate strip material, the demands that logoes of electronic products have highlighted appearances and the metal material is expected to be prepared into a glass appearance are met, and the defects that after anode oxidization, the traditional 5 series aluminium alloy has multiple micropores in the plate surface and has no mirror plane effect are effectively overcome.

Description

technical field [0001] The invention belongs to the field of preparation of aluminum and aluminum alloy materials, and in particular relates to a mirror-shaped aluminum plate and strip for anodic oxidation and a preparation method thereof. Background technique [0002] In recent years, aluminum has been widely used in mobile phone casings due to its anti-fingerprint pollution and high surface hardness after anodizing. At the beginning, more and more mobile phone brands hope to develop and produce mobile phone cases with similar effects. However, after the traditional 5-series alloy is anodized, complex and disordered hexagonal columnar micropores will be formed on the anodized layer, and the growth thickness will be uneven, so that the anode surface of the metal shell will be uneven, and the surface roughness Larger, in the case of different light refraction angles, the mirror effect will not be obtained when observed with the naked eye. [0003] So far, there have been fe...

Claims

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Application Information

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IPC IPC(8): C22C21/06C22C21/08C22F1/047
CPCC22C21/06C22C21/08C22F1/047
Inventor 江钟宇黄瑞银吴建新张宸玮刘华春
Owner CHINALCO RUIMIN