金属热处理 ›› 2026, Vol. 51 ›› Issue (1): 226-229.DOI: 10.13251/j.issn.0254-6051.2026.01.033

• 工艺研究 • 上一篇    下一篇

高温预时效对6061铝合金第二相粒子与力学性能的影响

谭国寅   

  1. 昆明冶金研究院有限公司, 云南 昆明 650031
  • 收稿日期:2025-07-28 修回日期:2025-10-31 出版日期:2026-01-25 发布日期:2026-01-27
  • 作者简介:谭国寅(1986—),男,高级工程师,硕士,主要研究方向为有色金属加工,E-mail: 80982250@163.com
  • 基金资助:
    云南省重大科技专项计划(202302AB080007)

Effect of high-temperature pre-aging on secondary phase particles and mechanical properties of 6061 aluminum alloy

Tan Guoyin   

  1. Kunming Metallurgical Research Institute Co., Ltd., Kunming Yunnan 650031, China
  • Received:2025-07-28 Revised:2025-10-31 Online:2026-01-25 Published:2026-01-27

摘要: 对6061铝合金进行固溶+常规时效和固溶+高温预时效+低温时效处理,利用OM、SEM、TEM和拉伸试验机研究了高温预时效对其组织与力学性能影响。结果表明,较常规时效,增加高温预时效后,合金中析出第二相粒子更为均匀细小,可充分钉扎晶界,联合低温再时效工序能有效抑制合金的再结晶过程,使6061铝合金强度和伸长率提高。

关键词: 6061铝合金, 高温预时效, 力学性能, 第二相粒子

Abstract: A 6061 aluminum alloy was subjected to solution treatment+conventional aging (T6) and solution treatment+high-temperature pre-aging+low-temperature final aging (two-step aging) processes. Effect of high-temperature pre-aging on microstructure and mechanical properties of the alloy was investigated using optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and tensile testing machine. The results show that compared with that of conventional aging, the introduction of high-temperature pre-aging leads to more uniform and finer secondary phase precipitates in the alloy, which can effectively pin grain boundaries. Combined with the subsequent low-temperature aging step, the recrystallization process of the alloy is significantly inhibited, resulting in simultaneous improvements in the strength and elongation of the 6061 aluminum alloy.

Key words: 6061 aluminum alloy, high temperature pre-aging, mechanical properties, secondary phase particles

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