A kind of aluminum alloy material used for mobile phone structural parts and preparation method thereof

Abstract

The invention relates to the technical field of aluminum alloy machining, in particular to an aluminum alloy material for a mobile phone structural part and a preparation method of the aluminum alloymaterial. The aluminum alloy material is prepared from the components in percent by mass: 0.80-0.95% of Mg, 0.52-0.66% of Si, 0.52-0.66% of Cu, 0.12-0.28% of Mn, 0.05-0.18% of Zr, smaller than or equal to 0.1% of Fe, smaller than or equal to 0.10% of the sum of other impurities and the balance Al. The aluminum alloy material for the mobile phone structural part has high strength, toughness, surface treatment adaptability, tensile strength, yield strength, corrosion resistance and other performance, the strength is improved by one time or above, the tensile strength is larger than or equal to 380 MPa, the yield strength is larger than or equal to 340 MPa, the drop test does not affect the quality and performance of alloy, corrosion sensitivity or numbing or fogging is not generated during highlight mirror anode oxidized surface treatment, and the aluminum alloy material is high in corrosion resistance and suitable for mobile phone structural part materials treated with highlight mirrors.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to an aluminum alloy material used for mobile phone structural parts and a preparation method thereof. Background technique [0002] At present, the aluminum alloy mobile phone structural parts on the market have problems such as low mechanical properties and poor surface decoration materials. Ordinary aluminum alloy mobile phone structural materials mostly use medium-strength aluminum alloys, such as 6XXX alloys, which are corrosion-sensitive when anodized for high-gloss mirror surfaces, and are prone to slight corrosion, resulting in numbness and fogging on the surface, and poor high-gloss mirror effects. However, if low-alloyed and low-strength aluminum alloys are used, although the high-gloss mirror surface anodizing treatment is not a big problem, there are problems such as low strength and failure to pass the drop test, which makes it difficult to meet the cu...

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Problems solved by technology

[0002] At present, the aluminum alloy mobile phone structural parts on the market have problems such as low mechanical properties and poor surface decoration materials.

Ordinary aluminum alloy mobile phone structural materials mostly use medium-strength aluminum alloys, such as 6XXX alloys, which are sensitive to corrosion when anodizing the high-gloss mirror surface, and are prone to slight corrosion, resulting in numbness and fogging on the surface, and poor high-gloss mirror effect

However, if low-alloyed and low-strength aluminum alloy is used, although the problem of high-gloss mirror anodizing treatment is not serious, there are problems of low strength and failure of the drop test, which makes it difficult to meet the current material performance requirements for mobile phone structural parts

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