Annealing process of 7075-O aluminum alloy sheet for stamping

doi:10.13251/j.issn.0254-6051.2020.04.031

Abstract

Abstract: Influence of Zn content, annealing temperature and cooling rate on mechanical properties and microstructure of 7075 aluminum sheet were studied by means of tensile test and microstructure observation. The results show that with the increase of annealing temperature, the strength of 7075-O aluminum alloy sheet decreases, and the elongation increases initially but then decreases. With the increase of Zn content and cooling rate, the strength of 7075-O aluminum alloy sheet increases gradually, and the elongation decreased. In conclusion, to meet the requirements of 7075-O aluminum alloy sheet for stamping, the comparatively ideal condition are w(Zn)≤5.6%, annealing at 410 ℃ for 3 h with furnace cooling to 100 ℃ and then air cooling.

Key words: 7075 aluminum alloy, annealing process, mechanical properties, Zn content

CLC Number:

TG166.3

Liu Suwei, Guo Yuhang. Annealing process of 7075-O aluminum alloy sheet for stamping[J]. Heat Treatment of Metals, 2020, 45(4): 149-151.

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