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Anodizable Al-Mn series cast aluminum alloy and anodizing process thereof

A technology of casting aluminum alloy and anodizing, applied in the field of aluminum alloy, can solve the problems of difficult dyeing process, uneven color, rough surface of anodized film, etc., and achieves the effect of easy control of adding amount, uniform color and improved mechanical properties

Active Publication Date: 2019-08-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nascent Al 6 The existence of the Mn phase makes the surface of the anodized film rough and the color is uneven, making it difficult to carry out the subsequent dyeing process

Method used

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  • Anodizable Al-Mn series cast aluminum alloy and anodizing process thereof
  • Anodizable Al-Mn series cast aluminum alloy and anodizing process thereof
  • Anodizable Al-Mn series cast aluminum alloy and anodizing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In this example, on the basis of comparative examples, the composition of the Al-2Mn alloy is controlled, and the raw materials used for the control include: Al-10Mn master alloy, Al-10Co master alloy, Al-2Sc master alloy and Al-10Ti master alloy. First heat the pure aluminum to 780°C, keep it warm for 3 hours to make it completely melt, add the intermediate alloy according to the proportion, then increase the temperature of the resistance furnace to 850°C and keep it warm for 30 minutes, and stir the metal solution every 10 minutes during the heat preservation period to ensure The added master alloy can be fully melted. Then the melt is degassed, impurity-removed, refined and slag-pulled, and left to stand for 5 minutes before being cast out of the furnace. The molten metal was poured into a mold at 200° C. for cooling to obtain the alloy of Example 1. The composition and mass percentage of the alloy are: Mn: 2%, Co: 1%, Sc: 0.3%, Ti: 0.2%, and the balance is Al.

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Embodiment 2

[0052] In this example, on the basis of comparative examples, the composition of the Al-2Mn alloy is controlled, and the raw materials used for the control include: Al-10Mn master alloy, Al-10Co master alloy, Al-2Sc master alloy and Al-10Ti master alloy. First heat the pure aluminum to 780°C, keep it warm for 3 hours to make it completely melt, add the intermediate alloy according to the proportion, then increase the temperature of the resistance furnace to 850°C and keep it warm for 30 minutes, and stir the metal solution every 10 minutes during the heat preservation period to ensure The added master alloy can be fully melted. Then the melt is degassed, impurity-removed, refined and slag-pulled, and then left to stand for 2 minutes before being cast out of the furnace. The molten metal was poured into a mold at 200°C for cooling to obtain the alloy of Example 2. The composition and mass percentage of the alloy are: Mn: 2%, Co: 0.7%, Sc: 0.2%, Ti: 0.3%, and the balance is Al....

Embodiment 3

[0057] In this example, on the basis of comparative examples, the composition of the Al-2Mn alloy is controlled, and the raw materials used for the control include: Al-10Mn master alloy, Al-10Co master alloy, Al-2Sc master alloy and Al-10Ti master alloy. First heat the pure aluminum to 780°C, keep it warm for 3 hours to make it completely melt, add the intermediate alloy according to the proportion, then increase the temperature of the resistance furnace to 850°C and keep it warm for 30 minutes, and stir the metal solution every 10 minutes during the heat preservation period to ensure The added master alloy can be fully melted. Then the melt is degassed, impurity-removed, refined and slag-pulled, and then left to stand for 4 minutes before being cast out of the furnace. The molten metal was poured into a mold at 200°C for cooling to obtain the alloy of Example 3. The composition and mass percentage of the alloy are: Mn: 2%, Co: 1.2%, Sc: 0.4%, Ti: 0.1%, and the balance is Al....

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Abstract

The invention discloses anodizable Al-Mn series cast aluminum alloy and an anodizing process thereof. The alloy comprises, by weight, 2.0% of Mn, 0.7-1.2 % of Co, 0.2-0.4% of Sc, 0.1-0.3 % of Ti, andthe balance being Al. The alloy anodizing process comprises the following steps: cutting, grinding, degreasing, alkali washing, ash removing, cleaning and drying the alloy; and then soaking the obtained aluminum alloy sample in an electrolyte, carrying out anodizing treatment on the aluminum alloy in a direct-current constant-current mode, taking out the workpiece, cleaning the workpiece with deionized water, and drying the workpiece to obtain an anodic oxide film. The tensile strength of the alloy is greatly improved, and the film obtained after anodizing is thick, smooth in surface, uniformin color and attractive; moreover, the alloy has good corrosion resistance, and is suitable for manufacturing a protective shell of a 3C electronic product.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to an anodizable Al-Mn series cast aluminum alloy and an anodic oxidation process thereof. Background technique [0002] In recent years, with the rapid popularization of 3C electronic products, its appearance parts have also undergone upgrading, and the original engineering plastics with poor texture have gradually developed into metal materials. Among the common metal materials, aluminum and aluminum alloys can provide sufficient protection while meeting the light weight requirements of 3C electronic products due to their low density, high specific strength and high specific stiffness. After the deformed aluminum alloy is anodized, a uniform and relatively transparent oxide film can be obtained. Coloring treatment can make the surface of the aluminum alloy obtain different colors. At the same time, the film layer can improve the corrosion resistance of the aluminum alloy a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03C25D11/08
CPCC22C1/026C22C1/03C22C21/00C25D11/08
Inventor 李文芳罗平俊黄毅柏鑫鑫
Owner SOUTH CHINA UNIV OF TECH
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