Deformed aluminum alloy

Abstract

The invention provides a deformed aluminum alloy, the composition of which comprises: 5.5% to 6.0% by weight of Zn; 2.0% to 2.5% by weight of Mg; 0.2% to 0.6% by weight of Cu; 0.1% to 0.2% by weight Cr of 0.2 wt% or less (greater than 0 wt%) Fe; 0.2 wt% or less (greater than 0 wt%) of Mn; 0.2 wt% or less (greater than 0 wt%) of Si; 0.1 wt% or less (greater than 0 wt%) %) of Ti; 0.05% by weight or less (greater than 0% by weight) of Sr; the balance being Al.

Description

technical field [0001] The invention relates to a deformed alloy, more specifically, to a deformed aluminum alloy. Background technique [0002] Aluminum extrusions are used for automobile bumpers, structural materials, smartphones, and IT accessories to achieve high strength. The 7000 series aluminum alloy is suitable as such an aluminum extruded profile, but there are problems of poor extrusion performance resulting in poor cross-sectional shape and low productivity. [0003] That is to say, after T6 heat treatment, the yield strength of 7000 series aluminum alloy is as high as 500MPa or more, so it is widely used in aerospace parts to automobile and smart phone casings, but due to the high rigidity of the raw material, there is a problem of poor extrusion performance, and there is a problem of poor extrusion performance after T6 heat treatment. deformation problem. Although existing structural materials can suppress deformation through final processing, smartphones and ...

AI Technical Summary

Problems solved by technology

7000 series aluminum alloy is suitable for this aluminum extrusion profile, but there are problems of poor extrusion performance resulting in poor cross-sectional shape and low productivity

[0003] That is to say, after T6 heat treatment, the yield strength of 7000 series aluminum alloy is as high as 500MPa or more, so it is widely used in aerospace parts to automobile and smart phone casings, but due to the high rigidity of the raw material, there is a problem of poor extrusion performance, and there is a problem of poor extrusion performance after T6 heat treatment. deformation problem

Although existing structural materials can suppress deformation through final processing, smartphones and various precision extruded products increase manufacturing costs when further processing is carried out, so price competitiveness decreases

In addition, when a billet is produced by a continuous casting process, when a sudden volume change of 0.3% or more occurs near the solidus line, there is a problem that cracks occur during the billet manufacturing process.

Images