Preparation of high-strength aluminum alloy for outer casing of electronic product

Abstract

The invention relate to a manufacturing method of a high strength aluminum alloy used as the outer casing part of the electronic product, which comprises the following steps: the material preparation step that an aluminum alloy which comprises 1.1 to 2.5 wt percent of copper, 0.7 to 1.3 wt percent of magnesium, 0.7 to 1.3 wt percent of silicon, and residual aluminum and unavoidable foreign substance is provided, the solid-solution treatment step that the aluminum alloy is warmed up to 540 DEG C plus or minus 10 DEG C and is kept for 30 to 90 minutes, the hardening step that the aluminum alloy is rapidly cooled down, the preheating step that the aluminum alloy is warmed up to 100 to 150 DEG C and is kept for 5 to 50 minutes, the integrating step that the aluminum alloy plate is moulded through pressing and the aging treatment step that the aluminum alloy is warmed up to 175 to 195 DEG C and is kept for 2 to 8 hours. The invention ensures the aluminum alloy sheet or forging bar section with specific components to have the best precipitation hardening property.

Description

technical field [0001] The invention relates to a method for producing an aluminum alloy, in particular to a method for producing a high-strength aluminum alloy used as a housing part of an electronic product. Background technique [0002] With the rapid development of science and technology and the requirements of users for product specifications, various products on the market today gradually require lightweight, such as: bicycles, automobiles, etc. Among them, information electronic products are the main products. , in addition to requiring the internal structure to be light and precise, the lightweight of the product shell has gradually attracted people's attention, which is also the main reason and the fastest way to reduce the weight of electronic products; [0003] In order to achieve the purpose of reducing the weight of the above-mentioned casing, light metals such as magnesium alloys and aluminum alloys are generally used as the main structure. In addition to low s...

AI Technical Summary

Problems solved by technology

[0012] To sum up, the strength and elongation of the magnesium alloys used in the market today are not superior to those of the 2xxx series aluminum alloys, and the magnesium alloys must be formed at a high temperature above 200°C during molding, while the 2xxx series aluminum alloys and 6xxx Although the 2xxx series aluminum alloys can be stamped and formed at room temperature, the 2xxx series aluminum alloys are difficult to weld or even impossible to weld due to the addition of a large amount of alloys, and at the same time make the 2xxx series alloys have low formability. The above-mentioned 2xxx series alloys will have cracks during stamping and forming. The results can be seen in 2024-T3 and 2024-O in Figure 7, which are not suitable for the use of electronic product casings. Although it can be welded, the strength of the 6xxx series aluminum alloys cannot be compared with the strength of the 2xxx series aluminum alloys. As a result, when the 6xxx series aluminum alloys are used in the shell, they need greater thickness or reinforcement, and cannot be thinner;

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