Effect of multistage solution and aging treatment on microstructure and properties of 7××× series ultra-high strength cold extruded aluminum alloy

doi:10.13251/j.issn.0254-6051.2021.07.031

Abstract

Abstract: Through the multistage solution and aging treatment of an ultra-high strength 7××× series aluminum alloy, it is found that with the increase of solution temperature and aging time, the mechanical properties of the alloy are significantly improved and then decreased. The results show that the optimum multistage solution process is solution treated at 450 ℃ for 2 h, 460 ℃ for 2 h, 470 ℃ for 2 h, 480 ℃ for 2 h, then water cooling and aging at 121 ℃ for 12 h, the alloy can obtain better mechanical properties and better matching of strength, hardness and plasticity.

Key words: 7000 series aluminum alloy, solution treatment, aging treatment

CLC Number:

TG156.9

Zhang Keren, Xu Xiaojing, Zhang Jie. Effect of multistage solution and aging treatment on microstructure and properties of 7××× series ultra-high strength cold extruded aluminum alloy[J]. Heat Treatment of Metals, 2021, 46(7): 165-167.

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