Effect of cold extrusion on corrosion resistance of high alloyed 7000 series aluminum alloy

doi:10.13251/j.issn.0254-6051.2020.09.007

Abstract

Abstract: Microstructure and corrosion resistance of high alloyed Al-12.3Zn-3Mg-2.5Cu-0.18Zr-0.07Sr aluminum alloy treated by solution-aging and solution-cold extrusion-aging were studied.The results show that the grains of the high alloyed aluminum alloy treated by solution-aging and solution-cold extrusion-aging show obvious zonal distribution,but the proportion of sub-grains in the solution-cold extrusion-aging treated alloy increases obviously.Compared with the solution-aging treatment,the solution-cold extrusion-aging treatment can obviously improve the corrosion resistance (exfoliation corrosion and intergranular corrosion) of the alloy,which means that cold extrusion can effectively improve the corrosion resistance of 7000 series aluminum alloy.

Key words: high alloyed 7000 series aluminum alloy, cold extrusion, microstructure, intergranular corrosion, exfoliation corrosion

CLC Number:

TG174.4

Wei Hongbo, Xu Xiaojing, Zhu Liangliang, Wang Yang, Wu Huafeng, Zhu Jingsong. Effect of cold extrusion on corrosion resistance of high alloyed 7000 series aluminum alloy[J]. Heat Treatment of Metals, 2020, 45(9): 46-49.

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