金属热处理 ›› 2025, Vol. 50 ›› Issue (10): 134-140.DOI: 10.13251/j.issn.0254-6051.2025.10.021

• 工艺研究 • 上一篇    下一篇

淬火温度对6082锻造铝合金力学性能及微观组织的影响

张泽涵1,2, 孙倩1,2, 张海鹏3   

  1. 1.武汉理工大学 现代汽车零部件技术湖北省重点实验室, 湖北 武汉 430070;
    2.武汉理工大学 汽车零部件技术湖北省协同创新中心, 湖北 武汉 430070;
    3.湖北三环锻造有限公司, 湖北 襄阳 441700
  • 收稿日期:2025-04-28 修回日期:2025-08-19 出版日期:2025-10-25 发布日期:2025-11-04
  • 通讯作者: 孙 倩,副教授,博士,E-mail: sunqian20180118@163.com
  • 作者简介:张泽涵(1999—),男,硕士研究生,主要研究方向为铝合金锻造工艺开发,E-mail: zzhwhut1999@163.com。
  • 基金资助:
    国家重点研发计划(2023YFB3307600);国家自然科学基金(52075400);湖北省重点研发计划(2023BAB194);湖北省自然科学基金(2023AFA069);湖北隆中实验室自主创新项目(2024KF-05)

Effect of quenching temperature on mechanical properties and microstructure of 6082 forged aluminum alloy

Zhang Zehan1,2, Sun Qian1,2, Zhang Haipeng3   

  1. 1. Hubei Key Laboratory of Advanced Technology for Automobile Components, Wuhan University of Technology, Wuhan Hubei 430070, China;
    2. Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan Hubei 430070, China;
    3. Hubei Triring Forging Co., Ltd., Xiangyang Hubei 441700, China
  • Received:2025-04-28 Revised:2025-08-19 Online:2025-10-25 Published:2025-11-04

摘要: 基于短流程热锻工艺(固溶-锻造-淬火-时效),研究了淬火温度对6082铝合金力学性能和微观组织的影响。通过等温法测定了6082铝合金的TTP曲线,确定了其淬火敏感温度区间;通过单向热压缩试验和维氏硬度测试确定了淬火温度对6082铝合金力学性能的影响规律;采用EBSD测试分析了不同淬火温度下6082铝合金的微观组织演变。结果表明,6082铝合金鼻端温度约为350 ℃,淬火敏感温度区间为290~415 ℃。当淬火温度为460 ℃,时效工艺为170 ℃×7 h时,合金试样的硬度为100 HV,当淬火温度由400 ℃提升至460 ℃时,试样的屈服强度提升约24 MPa。不同淬火温度下,不同强化机制对合金试样屈服强度的贡献值有所变化,较低的淬火温度会导致更高的细晶强化和位错强化效果,而较高的淬火温度可以在保证材料加工成形性能的同时使材料获得更加优异的析出强化效果。

关键词: 6082铝合金, 锻造, 淬火, 力学性能, 显微组织

Abstract: Based on the short process hot forging process (solution-forging-quenching-aging), the effect of quenching temperature on the mechanical properties and microstructure of 6082 aluminum alloy was studied. The TTP curve of the 6082 aluminum alloy was determined by insulation method, as well as its quenching sensitive temperature range. The effect of quenching temperature on the mechanical properties of the 6082 aluminum alloy was investigated through unidirectional hot compression tests and Vickers hardness tests. The microstructure evolution of the 6082 aluminum alloy quenched at different temperatures was analyzed by means of EBSD test. The results show that the nose end temperature of the 6082 aluminum alloy is about 350 ℃, and the quenching sensitive temperature range is 290-415 ℃. When the quenching temperature is 460 ℃ and the aging process is at 170 ℃ for 7 h, the hardness of the alloy is 100 HV. When the quenching temperature is increased from 400 ℃ to 460 ℃, the yield strength of the alloy increases by about 24 MPa. At different quenching temperatures, the contribution of different strengthening mechanisms to the yield strength of the alloy varies. Lower quenching temperatures result in higher grain refinement and dislocation strengthening effects, while higher quenching temperatures can ensure material processing and formability while achieving better precipitation strengthening effects.

Key words: 6082 aluminum alloy, forging, quenching, mechanical properties, microstructure

中图分类号: