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Aluminum alloy for high-strength and high-surface mobile phone casing and preparation method thereof

A mobile phone shell and aluminum alloy technology, which is applied in the field of high-strength and high-surface aluminum alloy for mobile phone shells and its preparation, can solve the problems of not meeting the strength requirements of the mobile phone shell, poor extrudability of the alloy, and high manufacturing cost. Achieve the effects of low preparation cost, reduced scrap rate, and less processing procedures

Active Publication Date: 2022-06-07
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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  • Aluminum alloy for high-strength and high-surface mobile phone casing and preparation method thereof
  • Aluminum alloy for high-strength and high-surface mobile phone casing and preparation method thereof
  • Aluminum alloy for high-strength and high-surface mobile phone casing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]An aluminum alloy for mobile phone housing, the aluminum alloy is Al-Mg-Si-Cu aluminum alloy, 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%, a single impurity ≤0.05%, the total impurity ≤0.15%, and the residual amount is Al.

[0042] Ingot specifications are 178mm in diameter;

[0043] Ingredients: Control the Fe ≤ in the raw materials before the furnace is 0.12%; the stove is not equipped with Ti, the scrap is used and the total Ti content in the scrap and aluminum ingot is ≤0.005%, and the Ti ≤ of the final finished product is 0.020%; the slag head and sampling spoon that contact the aluminum water are brushed before each use of the paint.

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

[0045] Melt filtration: Imported 40PPI + imported 50PPI filter plate is u...

Embodiment 2

[0058] An aluminum alloy for mobile phone housing, the aluminum alloy is Al-Mg-Si-Cu aluminum alloy, 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%, a single impurity ≤0.05%, the total impurity ≤0.15%, and the margin is Al.

[0059] Ingot specifications are 178mm in diameter;

[0060] Ingredients: Control the Fe ≤ in the raw materials before the furnace is 0.12%; the stove is not equipped with Ti, the scrap is used and the total Ti content in the scrap and aluminum ingot is ≤0.005%, and the Ti ≤ of the final finished product is 0.020%; the slag head and sampling spoon that contact the aluminum water are brushed before each use of the paint.

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

[0062] Melt filtration: Imported 40PPI + imported 50PPI filter plate is used onli...

Embodiment 3

[0074] A kind of aluminum alloy for mobile phone housing, the aluminum alloy is Al-Mg-Si-Cu aluminum alloy, 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%, a single impurity ≤0.05%, the total impurity ≤0.15%, and the margin is Al.

[0075] Preparation method of aluminum alloy for mobile phone shell, comprising the following steps:

[0076] Step (1) Melt and cast the aluminum alloy raw materials after batching to obtain the aluminum alloy ingot;

[0077] Step (2) After the aluminum alloy ingot obtained in the above steps is homogenized by heat treatment, extrusion, online quenching, and aging heat treatment, the aluminum alloy extrusion belt plate is obtained for the mobile phone housing.

[0078] Wherein, step (1) is specifically:

[0079] (1.1) After the aluminum alloy raw materials are fed, the furnace is melted to obtain the raw material melting liquid;

...

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Abstract

The invention relates to the technical field of mobile phone casings, in particular to an aluminum alloy for a high-strength and high-surface mobile phone casing and a preparation method thereof. The chemical composition of the aluminum alloy is (wt%): Si: 0.70%-1.4%, Fe: ≤0.15%, Cu: 0.60%‑1.0%, Mn: 0.50%‑0.80%, Mg: 0.60%‑1.20%, Ti: ≤0.015%, other individual: ≤0.05%, and the balance of aluminum. The present invention combines the appearance requirements and strength requirements of the high surface of the aluminum alloy used for the mobile phone case, optimizes the design of a new chemical composition and preparation process of the aluminum alloy, and greatly improves the surface quality of the aluminum alloy used for the mobile phone case while ensuring the high surface quality. The yield strength of the alloy meets the requirements for the use of mobile phone casing materials. The aluminum alloy of the present invention is anodized after CNC, and there are no defects such as material lines, black spots, black lines, color differences and mottled spots, which greatly reduces the resulting reject rate; meanwhile, the aluminum alloy of the present invention has high yield strength, and its yield Strength not less than 360MPa.

Description

Technical field [0001] The present invention relates to the technical field of mobile phone housing, specifically a high-strength high-surface mobile phone housing aluminum alloy and preparation method thereof. Background [0002] With the popularity of smart phones and the improvement of living standards, aluminum alloys with metal texture and high surface of mobile phone cases have been widely used. High-end smartphone housings have phased out traditional plastic, aluminum alloy die-castings, stainless steel and titanium alloy and other fuselage shells, and generally use CNC and surface treatment of high-surface high-strength aluminum alloys. 6000 series aluminum alloy extruded aluminum material was first applied to Apple iPhone6 and Apple iPhone 6plus high-end smart phones, its metallic texture, colorful and rich advantages, by the mobile phone market sought after. 6000 series aluminum alloy has excellent extrusion deformation processing performance, good anodizing effect, low...

Claims

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Application Information

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Patent Type & Authority Patents(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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