A kind of shell material of electronic product and its manufacturing method

Abstract

The invention discloses a shell material for electronic products and a manufacturing method thereof. The material is composed of 0.5% to 4% by weight of Mg, 5% to 9% of Zn, 0.1% to 2% of Cu, the balance is Al and unavoidable impurities, wherein the content of impurity elements is less than 0.1% . The production method is as follows: preheat the furnace temperature, put pure Al in the smelting furnace and raise the temperature to 790-830°C, after the pure aluminum is melted, the temperature rises to 1100-1200°C, add pure Zn and pure Cu, and put Lower the temperature to 650-700°C, add pure Mg, heat up to 730-750°C after melting, add hexachloroethane to refine and remove slag, let stand for 15-30min before pouring. After the ingot is homogenized, it is extruded to form a profile with equiaxed crystal grains, isotropic grain orientation and 101 texture in the [010] direction. Cold-rolling the profile to make the aluminum alloy generate internal stress and act as the driving force for subsequent recrystallization, and then perform solution and aging treatment to restore the coarse-grained layer to recrystallize into a fine grain while maintaining the state of equiaxed crystal grains. of grains.

Description

technical field [0001] The invention relates to an electronic product casing material and a manufacturing method thereof. Background technique [0002] With the rapid development of communication and digital technology, portable electronic products (such as mobile phones, charging treasures, etc.) have undergone several upgrades in just a few decades, becoming the epitome of technological progress. The casing is not only a powerful protective umbrella for portable electronic products, it can effectively reduce the invasion of dust, reduce the damage caused by accidental drops, enhance its service life, and more importantly, improve the product experience of users. Therefore, the materials for making the casing of portable electronic products are required to have the characteristics of high strength, good heat resistance and thermal conductivity, electromagnetic shielding, stable size, and good appearance. The role of heat dissipation and aesthetics also puts forward higher ...

AI Technical Summary

Problems solved by technology

In 2002, the second generation of IPod first started to use 5 series aluminum alloy as the shell, but the aluminum alloy of this series is not resistant to scratches.

In 2014, the iPhone 6 continued to use 6063 aluminum alloy, but with the increase in the size of the mobile phone screen and the thinning of the mobile phone shell, this series of aluminum alloys could no longer meet the strength requirements, so the mobile phone often bent

[0005] In 2015, Apple 6s first started to use its self-developed 7003 aluminum alloy as the mobile phone casing, which improved the strength and hardness, but there are only two suppliers in the world, and the yield is also low

According to the previous research, when the existing grades of 7 series aluminum alloys are used to make portable electronic product casings, the appearance after anodic oxidation does not meet the requirements, and there are long strips of non-reflective structures in the form of filaments, which make the surface reflectively uneven

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