金属热处理 ›› 2024, Vol. 49 ›› Issue (1): 148-153.DOI: 10.13251/j.issn.0254-6051.2024.01.023

• 工艺研究 • 上一篇    下一篇

固溶时效处理对AlMg5Si2Mn铝合金组织与性能的影响

邸抑非, 李佳, 李勇, 赵荣达, 相珺, 伍复发   

  1. 辽宁工业大学 材料科学与工程学院, 辽宁 锦州 121001
  • 收稿日期:2023-09-07 修回日期:2023-12-02 发布日期:2024-02-29
  • 通讯作者: 赵荣达,教授,博士,E-mail:rongdazhao@lnut.edu.cn
  • 作者简介:邸抑非(1997—),男,硕士研究生,主要研究方向为金属材料和新能源材料,E-mail:yifeidiedu@163.com。
  • 基金资助:
    辽宁省自然科学基金博士科研启动基金(2022-BS-310);辽宁省教育厅科学研究经费项目 (LJKMZ20220959)

Effect of solution and aging treatment on microstructure and properties of AlMg5Si2Mn aluminum alloy

Di Yifei, Li Jia, Li Yong, Zhao Rongda, Xiang Jun, Wu Fufa   

  1. School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou Liaoning 121001, China
  • Received:2023-09-07 Revised:2023-12-02 Published:2024-02-29

摘要: 利用硬度测试、显微组织观察、XRD、拉伸性能测试及断口截面组织观察等表征手段研究了固溶时效处理对AlMg5Si2Mn铝合金组织与性能的影响。结果表明,AlMg5Si2Mn铝合金固溶时效处理后的组织中Mg2Si形貌发生改变,从迷宫状和棒状转变为细小圆球状,分布更为均匀,并且铝合金的硬度显著提高,还随固溶温度的升高而先增加后降低,同时拉伸性能亦有显著提高。经530 ℃×30 min固溶和190 ℃×6 h时效后,合金的硬度较高, 为49.5 HRB,抗拉强度、屈服强度和断后伸长率分别为260 MPa、173 MPa和17%。

关键词: AlMg5Si2Mn铝合金, Mg2Si, 固溶时效处理, 力学性能

Abstract: Effects of solution and aging treatment on microstructure and properties of the AlMg5Si2Mn aluminum alloy were studied by means of hardness testing, microstructure observation, XRD, tensile testing and cross-section fracture observation. The results show that after solution and aging treatment, the morphology of Mg2Si in the alloy changes from labyrinth and rod to fine spherical shape and distributes more uniform, and thardness of the alloy is significantly improved, which increases first and then decreases as the solution treatment temperature increases, meanwhile, the tensile properties are also significantly improved. After solution treatment at 530 ℃ for 30 min and aging at 190 ℃ for 6 h, the hardness of the AlMg5Si2Mn aluminum alloy is high and up to 49.5 HRB, the tensile strength, yield strength and elongation after fracture is 260 MPa, 173 MPa, 17%, respectively.

Key words: AlMg5Si2Mn aluminum alloy, Mg2Si, solution and aging treatment, mechanical properties

中图分类号: