金属热处理 ›› 2024, Vol. 49 ›› Issue (11): 60-68.DOI: 10.13251/j.issn.0254-6051.2024.11.009

• 组织与性能 • 上一篇    下一篇

固溶处理对铝合金包铝薄板组织演变及性能的影响

王经涛1,2, 孙宁1, 余浪1, 王永红1, 于继海1, 黄同瑊1, 张芮源1   

  1. 1.山东南山铝业股份有限公司 国家铝合金压力加工工程技术研究中心, 山东 龙口 265713;
    2.烟台南山学院 材料科学与工程学院, 山东 龙口 265713
  • 收稿日期:2024-06-11 修回日期:2024-09-28 出版日期:2024-11-25 发布日期:2025-01-09
  • 通讯作者: 孙 宁,硕士,E-mail:ningsun95@163.com
  • 作者简介:王经涛(1995—),男,硕士,主要研究方向为高强铝合金成分设计、热加工、热处理等,E-mail:wjta0815@163.com。

Effect of solution treatment on microstructure evolution and mechanical properties of aluminum alloy aluminum clad thin plate

Wang Jingtao1,2, Sun Ning1, Yu Lang1, Wang Yonghong1, Yu Jihai1, Huang Tongjian1, Zhang Ruiyuan1   

  1. 1. National Engineering Research Center for Plastic Working of Aluminium Alloys, Shandong Nanshan Aluminium Co., Ltd., Longkou Shandong 265713, China;
    2. School of Materials Science and Engineering, Yantai Nanshan University, Longkou Shandong 265713, China
  • Received:2024-06-11 Revised:2024-09-28 Online:2024-11-25 Published:2025-01-09

摘要: 通过金相显微镜、扫描电镜及配套能谱仪、差示扫描量热仪等技术手段以及室温拉伸研究了2×××系铝合金包铝薄板在固溶处理中的组织及性能变化。结果表明,冷轧态包铝薄板经过固溶处理后,基体部分组织中仍存在尺寸较大的AlCuFeMn、Al2CuMg相。但随着固溶温度的升高和保温时间的延长,组织中残留第二相含量均逐渐降低。在包铝层及过渡区域内Mg、Cu元素扩散程度较大,但未出现由于元素扩散严重引起的包铝层失效问题。当固溶工艺为500 ℃×20 min时,合金组织中残留第二相含量最低,为1.101%,且经96 h自然时效处理后,包铝薄板的屈服强度为286.5 MPa、抗拉强度为458.0 MPa、断后伸长率为23.1%,能够获得较好强塑性匹配。

关键词: 2×××系合金, 包铝薄板, 固溶处理, 显微组织, 力学性能

Abstract: Evolution of microstructure and properties of 2××× series aluminum alloy aluminum clad thin plate during solution treatment were studied by means of metallographic microscope, scanning electron microscope, energy dispersive spectroscopy, differential scanning calorimetry and room temperature tensile test. The results indicate that after solution treatment, there are still large-sized AlCuFeMn and Al2CuMg phases in substrate of the cold-rolled aluminum clad thin plate. However, with the increase of solution treatment temperature and the extension of holding time, the content of retained second phases in the substrate gradually decreases. The diffusion degree of Mg and Cu elements is relatively high in the aluminum coating and the transition zone, but there is no failure problem of the aluminum coating caused by severe element diffusion. When the solution treatment process is 500 ℃×20 min, the retained second phase content in the alloy is the lowest of 1.101%. After natural aging for 96 h, the yield strength of the aluminum clad thin plate is 286.5 MPa, the tensile strength is 458.0 MPa, and the elongation after fracture is 23.1%, good combination of strength and plasticity is obtained.

Key words: 2××× aluminum alloy, aluminum clad thin plate, solution treatment, microstructure, mechanical properties

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