固溶时效处理对轧制Al-Mg-Si合金组织与力学性能的影响

doi:10.13251/j.issn.0254-6051.2025.08.022

金属热处理 ›› 2025, Vol. 50 ›› Issue (8): 137-143.DOI: 10.13251/j.issn.0254-6051.2025.08.022

固溶时效处理对轧制Al-Mg-Si合金组织与力学性能的影响

王潇维, 郭胤岑, 樊善明, 彭明军, 张帅博, 段永华, 周晓龙, 李萌蘖

昆明理工大学材料科学与工程学院云南省高端轻合金集成计算材料工程重点实验室,云南昆明 650093

收稿日期:2025-03-15 修回日期:2025-07-02 出版日期:2025-08-25 发布日期:2025-09-10
通讯作者: 彭明军,副教授,博士,E-mail:pmj5530594@kust.edu.cn
作者简介:王潇维(2000—),男,硕士研究生,主要研究方向为有色金属材料,E-mail:2771189040@qq.com。
基金资助:
云南省重大科技专项计划(202402AB080012)

Effect of solution treatment and aging on microstructure and mechanical properties of rolled Al-Mg-Si alloy

Wang Xiaowei, Guo Yincen, Fan Shanming, Peng Mingjun, Zhang Shuaibo, Duan Yonghua, Zhou Xiaolong, Li Mengnie

Yunnan Key Laboratory of Integrated Computational Materials Engineering for Advanced Light Alloys, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China

Received:2025-03-15 Revised:2025-07-02 Online:2025-08-25 Published:2025-09-10

摘要/Abstract

摘要： 通过扫描电镜(SEM)、万能试验机、显微维氏硬度计等研究固溶时效处理对轧制Al-Mg-Si合金板材组织与力学性能的影响。结果表明,在560 ℃固溶处理过程中,Al-Mg-Si合金晶粒会发生明显的回复再结晶,Mg、Si原子发生回溶,完全回溶所需时间为10~30 min。随固溶时间的延长,合金的几何必须位错密度呈现先增大后减小的趋势,显微硬度呈现相同变化趋势。经560 ℃×10 min固溶+180 ℃×30 min时效后,轧制合金板的抗拉强度为320 MPa,断裂总延伸率为25.9%,综合力学性能最好。

关键词: Al-Mg-Si合金, 固溶处理, 时效, 组织, 力学性能

Abstract: Effect of solution treatment and aging on microstructure and mechanical properties of the rolled Al-Mg-Si alloy sheet was studied by means of scanning electron microscope (SEM), universal testing machine, and micro Vickers hardness tester. The results show that during the solution treatment at 560 ℃, the obvious recovery and recrystallization of grains occur in the tested Al-Mg-Si alloy, the Mg and Si atoms redissolve, and the complete redissolution time is 10-30 min. With the increase of solution time, the geometrically necessary dislocation density of the alloy increases first and then decreases, and the change of microhardness is the same. The tensile strength of the rolled alloy sheet is 320 MPa and the total elongation at fracture is 25.9% when solution treated at 560 ℃ for 10 min and then aged at 180 ℃ for 30 min, obtaining the optimum comprehensive mechanical properties.

Key words: Al-Mg-Si alloy, solution treatment, aging, microstructure, mechanical properties

中图分类号:

王潇维, 郭胤岑, 樊善明, 彭明军, 张帅博, 段永华, 周晓龙, 李萌蘖. 固溶时效处理对轧制Al-Mg-Si合金组织与力学性能的影响[J]. 金属热处理, 2025, 50(8): 137-143.

Wang Xiaowei, Guo Yincen, Fan Shanming, Peng Mingjun, Zhang Shuaibo, Duan Yonghua, Zhou Xiaolong, Li Mengnie. Effect of solution treatment and aging on microstructure and mechanical properties of rolled Al-Mg-Si alloy[J]. Heat Treatment of Metals, 2025, 50(8): 137-143.

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固溶时效处理对轧制Al-Mg-Si合金组织与力学性能的影响

Effect of solution treatment and aging on microstructure and mechanical properties of rolled Al-Mg-Si alloy

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