High-strength 6xxx aluminum alloy for mobile phone parts and machining method thereof

Abstract

The invention relates to a high-strength 6xxx aluminum alloy for mobile phone parts and a machining method thereof. The high-strength 6xxx aluminum alloy comprises, by weight, 0.6-1.3% of Mg, 0.6-1.3% of Si, 0.1-1.0% of Cu, 0.1-1.2% of Mn, 0.10-0.5% of Cr, 0-0.25% of Zr, 0-0.20% of Ti, 0-0.50% of Zn, 0-0.40% of Fe, and the balance Al and inevitable impurities. The machining process of the high-strength 6xxx aluminum alloy comprises the steps that firstly, cast ingots are subjected to homogenizing heat treatment and then subjected to forced air cooling, and then the cast ingots are extruded after being preheated; and secondly, the cast ingots are subjected to on-line water hardening, straightening and artificial aging. According to the high-strength 6xxx aluminum alloy for the mobile phone parts and the machining method thereof, on the basis of guaranteeing the anodic oxidization property of the alloy, the strength of the alloy is improved; the aluminum alloy is an ideal material for manufacturing external parts of electronic products and has wide market application prospects.

Description

technical field [0001] The invention relates to an aluminum alloy, in particular to a 6xxx series aluminum alloy for mobile phone parts and a manufacturing method thereof, belonging to the technical field of nonferrous metals. Background technique [0002] The lightness and thinning of smartphones put forward higher requirements for the performance of mobile phone components, such as middle frames and casings: that is, they have higher strength when the anodic oxidation performance is good. The use of aluminum alloy to manufacture the middle frame and shell of smart phones is the current development trend of the mobile phone industry. The biggest advantage of aluminum alloy materials applied to mobile phone products lies in good thermal conductivity and high mechanical properties: the hardness of aluminum alloy is several times that of traditional plastic parts; the heat dissipation performance of aluminum alloy is much better than plastic, which can quickly convert smart T...

AI Technical Summary

Problems solved by technology

Compared with 6061 aluminum alloy, 6063 aluminum alloy has better anodic oxidation performance, but the strength of 6063 aluminum alloy is much lower than that of 6061 aluminum alloy, and the performance of existing 6061 aluminum alloy is becoming more and more difficult to meet the needs of the development of smart phones

On the other hand, in order to improve the strength of the material, in addition to the adjustment of the alloy composition, the extrusion outlet temperature of the extruded material must also be increased, but this often results in serious surface coarse grains, and even coarse grains appear inside the material. , and eventually cause severe surface defects in the material after anodizing

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