Surface treatment method of die-casting aluminum alloy, die-casting aluminum alloy, and mobile terminal shell
A technology of casting aluminum alloy and surface treatment, which is applied in the field of mobile phone casing, surface treatment of die-casting aluminum alloy, and die-casting aluminum alloy. The process is simple and easy to control, easy to process and low cost
Inactive Publication Date: 2018-10-09
GUANGDONG JANUS SMART GRP CO LTD +1
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Problems solved by technology
In this existing solution, although the obtained aluminum alloy casing has a metallic luster and a good appearance effect, the processing procedure is complicated, the processing cost is high, and the raw material 6-series and 7-series aluminum alloys are also more expensive
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[0012] The present invention will be described in further detail below in combination with specific embodiments and with reference to the accompanying drawings.
[0013] The invention performs surface treatment on the die-casting aluminum alloy. Since die-casting aluminum alloys are often ADC3-ADC12 type die-casting aluminum alloys, usually the content of Si, Mg, and Fe is very high, such as direct anodic oxidation coating treatment, it will form interval compounds such as AL-Mg-Si-Fe, and the content ratio is relatively high. High Si will also form silicon particles in the process of anodizing. All of the above will cause the formed oxide film to be black, blue, milky white and other defects, which will affect the appearance effect. surface decoration. In the improvement process, some schemes try to use anodic oxidation after silicon reduction treatment, some schemes try to use a specific anodic oxidation treatment process, and some schemes use improved formula in aluminum a...
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Abstract
The present invention discloses a surface treatment method for a die-casting aluminum alloy, a die-casting aluminum alloy, and a mobile terminal housing. The surface treatment method comprises the following steps: 1) performing ultrasonic cleaning for the die-casting aluminum alloy obtained by die-casting molding and then removing surface impurity of the die-casting aluminum alloy; 2) performing vacuum plating, wherein the pressure in a vacuum chamber is kept at the level higher than 6.5*10<-3>Pa, argon gas with the purity higher than 99.99% is fed in, and the die-casting aluminum alloy treated by the step 1) is plated with a titanium target material with the purity higher than 99.99%, so that a layer of titanium film layer with the thickness of 1-10[mu]m is formed on the surface of the die-casting aluminum alloy; 3) performing anodic oxidation treatment for the die-casting aluminum alloy treated by the step 2); and 4) performing hole sealing processing for a titanium oxide layer of the die-casting aluminum alloy treated by the step 3). Through adoption of the surface treatment method of the present invention, the treated die-casting aluminum alloy has metallic luster and a good appearance effect, at the same time, the surface treatment method has simple treatment process and low cost, and can reduce cost of a mobile terminal when being applied to the mobile terminal.
Description
【Technical field】 [0001] The invention relates to the processing of die-casting aluminum alloys, in particular to a surface treatment method of die-casting aluminum alloys, die-casting aluminum alloys and mobile phone casings. 【Background technique】 [0002] Due to the advantages of low density, high thermal conductivity, and good plasticity, aluminum alloy is used by many manufacturers to make notebook casings and smart phone casings. However, due to its relatively active nature, it is easy to form an amorphous oxide film in the air, making its surface lose its metallic luster and become ugly, thus limiting the application of aluminum alloys to a certain extent. In order to meet the demand of smart mobile terminals with beautiful and stylish appearance, aluminum alloys of 6 series and 7 series are usually used as raw materials to process the shells of smart mobile terminals. When processing 6-series and 7-series aluminum alloys, stamping is performed first, then the shape ...
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IPC IPC(8): H05K5/04
Inventor 杨建明王长明谢守德
Owner GUANGDONG JANUS SMART GRP CO LTD