金属热处理 ›› 2025, Vol. 50 ›› Issue (11): 226-233.DOI: 10.13251/j.issn.0254-6051.2025.11.031

• 工艺研究 • 上一篇    下一篇

冷轧变形及等温退火对3005铝合金板材组织与性能的影响

赖春明1, 李培1, 杨亮2, 谭海林1, 刘周攀3   

  1. 1.湖南化工职业技术学院, 湖南 株洲 412011;
    2.南昌航空大学 航空制造工程学院, 江西 南昌 320063;
    3.中国航发南方工业有限公司, 湖南 株洲 412000
  • 收稿日期:2025-03-20 修回日期:2025-10-05 发布日期:2025-12-16
  • 通讯作者: 杨 亮,副教授,博士,E-mail:L.yang@nchu.edu.cn
  • 作者简介:赖春明(1989—),男,副教授,硕士,主要研究方向为金属材料成形及其组织性能控制,E-mail:laichunming2020@163.com。
  • 基金资助:
    湖南省自然科学基金科教联合基金(2022JJ60042);湖南省教育厅科学研究项目优秀青年项目(23B0966)

Effect of cold rolling and isothermal annealing on microstructure and properties of 3005 aluminum alloy sheet

Lai Chunming1, Li Pei1, Yang Liang2, Tan Hailin1, Liu Zhoupan3   

  1. 1. Hunan Chemical Vocational and Technical College, Zhuzhou Hunan 412011, China;
    2. School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang Jiangxi 320063, China;
    3. AECC South Industry Co., Ltd., Zhuzhou Hunan 412000, China
  • Received:2025-03-20 Revised:2025-10-05 Published:2025-12-16

摘要: 通过硬度测试、拉伸试验和EBSD、SEM微观组织分析,研究了冷轧变形量(43%、66%、87%)和退火温度(180~350 ℃)对3005铝合金板材力学性能及微观组织的影响。结果表明,冷轧变形导致晶粒沿轧制方向拉长,形成纤维状组织,显著提高了板材的硬度和强度,但降低了塑性。随退火温度的升高,组织中逐渐形成细小等轴状的再结晶晶粒,再结晶分数增加。当退火温度达到320 ℃时,再结晶基本完成。随着退火温度的升高,冷轧板材的硬度和强度逐渐降低,伸长率则逐渐提高。此外,冷轧变形量越大,相同退火温度下试样的再结晶分数越高,但析出物的钉扎效应在高温退火时对再结晶过程产生了显著影响,导致变形量为66%的试样在高温退火时再结晶速度最快。

关键词: 等温退火, 铝合金, 冷轧变形, 再结晶, 力学性能

Abstract: Effects of cold rolling reduction (43%, 66%, 87%) and annealing temperature (180-350 ℃) on the mechanical properties and microstructure of 3005 aluminum alloy sheet were investigated by means of hardness tests, tensile tests and microstructural analysis through EBSD and SEM. The results indicate that cold rolling elongates the grains along the rolling direction, forming a fibrous microstructure, which significantly enhances the hardness and strength of the sheets but reduces the ductility. With the increase of annealing temperature, fine equiaxed recrystallized grains form gradually and the recrystallization fraction increases. When the annealing temperature reaches 320 ℃, the recrystallization can be nearly completed. As the annealing temperature increases, the hardness and strength of the cold-rolled sheet gradually decrease, while the elongation gradually increases. Additionally, a greater cold rolling reduction results in a higher recrystallization fraction at the same annealing temperature. However, the pinning effect of precipitates significantly affects the recrystallization process during high-temperature annealing, leading to the fastest recrystallization rate in specimens with a cold rolling reduction of 66%.

Key words: isothermal annealing, aluminum alloy, cold rolling, recrystallization, mechanical properties

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