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High-strength high-surface aluminum alloy for mobile phone shell and preparation method therefor

A mobile phone case and aluminum alloy technology, which is applied in the field of aluminum alloy for high-strength and high-surface mobile phone case and its preparation, can solve the problems of inability to meet the strength requirements of the mobile phone case, poor extrudable performance of the alloy, and high production cost, Achieve the effects of low preparation cost, reduced scrap rate, and fewer processing steps

Active Publication Date: 2021-04-13
广东润华轻合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 6063 and 6061 aluminum alloys commonly used in the industry have low strength and cannot meet the strength requirements of mobile phone casings; 7000 series aluminum alloys can meet the high-strength requirements of mobile phone casings, but the alloy’s extrudability is relatively poor, and anodes must be researched and developed Oxidation special process, high preparation cost

Method used

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  • High-strength high-surface aluminum alloy for mobile phone shell and preparation method therefor
  • High-strength high-surface aluminum alloy for mobile phone shell and preparation method therefor
  • High-strength high-surface aluminum alloy for mobile phone shell and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] An aluminum alloy for a mobile phone case, the aluminum alloy is an Al-Mg-Si-Cu aluminum alloy, and the chemical composition of the Al-Mg-Si-Cu aluminum alloy is (wt%): Si is 1.01% , Fe is 0.08%, Cu is 0.73%, Mn is 0.51%, Mg is 0.96%, Ni is 0.01%, Zn is 0.01%, Ti is 0.012%, single impurity ≤ 0.05%, total impurity ≤ 0.15%, balance for Al.

[0042] The ingot size is 178mm in diameter;

[0043] Ingredients: Fe in the raw materials is controlled to be less than or equal to 0.12% in the batching before the furnace; Ti is not mixed in front of the furnace, and the waste is used to ensure that the total Ti content in the waste and aluminum ingots is not more than 0.005%, and the Ti of the final finished ingot is not more than 0.020%; Slag removal head, sampling spoon and other tools should be painted with paint before each use.

[0044] On-line melt refining and purification: the melt refining temperature is 720-760°C, and the refining gas uses high-purity argon.

[0045] M...

Embodiment 2

[0058] An aluminum alloy for a mobile phone casing, the aluminum alloy is an Al-Mg-Si-Cu aluminum alloy, and the chemical composition of the Al-Mg-Si-Cu aluminum alloy is (wt%): Si is 0.93% , Fe is 0.06%, Cu is 0.71%, Mn is 0.54%, Mg is 0.87%, Ni is 0.01%, Zn is 0.01%, Ti is 0.011%, single impurity ≤ 0.05%, total impurity ≤ 0.15%, balance for Al.

[0059] The ingot size is 178mm in diameter;

[0060] Ingredients: Fe in the raw materials is controlled to be less than or equal to 0.12% in the batching before the furnace; Ti is not mixed in front of the furnace, and the waste is used to ensure that the total Ti content in the waste and aluminum ingots is not more than 0.005%, and the Ti of the final finished ingot is not more than 0.020%; Slag removal head, sampling spoon and other tools should be painted with paint before each use.

[0061] On-line melt refining and purification: the melt refining temperature is 720-760°C, and the refining gas uses high-purity argon.

[0062]...

Embodiment 3

[0074] An aluminum alloy for a mobile phone casing, the aluminum alloy is an Al-Mg-Si-Cu aluminum alloy, and the chemical composition of the Al-Mg-Si-Cu aluminum alloy is (wt%): Si is 0.72% , Fe is 0.05%, Cu is 0.80%, Mn is 0.64%, Mg is 0.89%, Ni is 0.01%, Zn is 0.01%, Ti is 0.012%, single impurity ≤ 0.05%, total impurity ≤ 0.15%, balance for Al.

[0075] A method for preparing an aluminum alloy for a mobile phone casing, comprising the following steps:

[0076] Step (1) Melting and casting the aluminum alloy raw material after batching to obtain an aluminum alloy ingot;

[0077] Step (2) After the aluminum alloy ingot obtained in the above step is subjected to homogenization heat treatment, extrusion, on-line quenching, and aging heat treatment, an aluminum alloy extruded strip plate is obtained, which is used for a mobile phone casing.

[0078] Among them, step (1) is specifically:

[0079] (1.1) After the aluminum alloy raw materials are batched, they are melted in a fur...

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Abstract

The invention relates to the technical field of mobile phone shells, specifically to a high-strength high-surface aluminum alloy for a mobile phone shell and a preparation method therefor. The aluminum alloy comprises the following chemical components in percentage by weight (wt%): 0.70%-1.4% of Si, less than or equal to 0.15% of Fe, 0.60%-1.0% of Cu, 0.50%-0.80% of Mn, 0.60%-1.20% of Mg, less than or equal to 0.015% of Ti, less than or equal to 0.05% of other singles, and the balance of aluminum. According to the aluminum alloy for the mobile phone shell, the appearance requirement and the strength requirement of the high surface of the aluminum alloy for the mobile phone shell are combined, a new aluminum alloy chemical component and a preparation process are optimally designed, the yield strength of the alloy is greatly improved while the high surface quality of the aluminum alloy for the mobile phone shell is guaranteed, and the use requirement of a mobile phone shell material is met. The aluminum alloy is anodized after CNC, the defects of material lines, so that black spots, black lines, chromatic aberration and piebald spots are avoided, and the rejection rate caused by the defects is greatly reduced; and meanwhile, the aluminum alloy is high in yield strength, and the yield strength of the aluminum alloy is not lower than 360 MPa.

Description

technical field [0001] The invention relates to the technical field of mobile phone casings, in particular to an aluminum alloy for high-strength and high-surface mobile phone casings and a preparation method thereof. Background technique [0002] With the popularity of smart phones and the improvement of living standards, aluminum alloys for mobile phone casings with metallic texture and high surface have been widely used. High-end smartphone casings have phased out traditional plastic, aluminum alloy die-casting, stainless steel, and titanium alloy casings, and high-surface, high-strength aluminum alloys with CNC and surface treatment are commonly used. The 6000-series aluminum alloy extruded aluminum was first used in Apple iPhone6 ​​and Apple iPhone6plus high-end smart phones. Its metal texture, bright colors and other advantages have been sought after by the mobile phone market. The 6000-series aluminum alloy has excellent extrusion deformation processing performance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/02C22C21/08C22C21/18C22F1/04C22F1/043C22F1/057C22F1/047C22F1/05C22C1/03C22C1/06
CPCC22C21/00C22C21/02C22C21/08C22C21/18C22C21/16C22C21/14C22F1/04C22F1/043C22F1/057C22F1/047C22F1/05C22F1/002C22C1/03C22C1/026C22C1/06
Inventor 索有喜周兵峰郭佛保常江
Owner 广东润华轻合金有限公司
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