张美丽,韩茜,李春,罗姝淑,王骞,高世豪

• 1:商洛学院陕西省尾矿资源综合利用重点实验室
• 2:商洛学院陕西省矿产资源清洁高效转化与新材料工程研究中心

摘要(Abstract)：

采用光学显微镜、扫描电镜、X射线衍射、万能试验机和电化学测试等手段，研究了固溶处理温度对含稀土7A04铝合金组织和性能的影响。结果表明：在7A04铝合金中加入0.5%的稀土元素(La, Ce)后，其组织主要由α-Al、MgZn_2相、Al_2Cu相以及稀土相Al_8Cu_4(LaCe)和Al_3(LaCe)组成，稀土相沿晶界析出抑制了晶粒的生长，晶粒得到细化；固溶处理后，含稀土铝合金中的第二相逐渐发生溶解而进入铝基体中，随固溶温度的升高，含稀土7A04铝合金的硬度、抗拉强度、伸长率和耐腐蚀性能均呈先增大后减小的变化趋势，在固溶处理温度为490℃时综合性能最好，其硬度、抗拉强度和伸长率分别为223 HV0.3、594 MPa和13.6%,相对未热处理的铝合金，其硬度、抗拉强度和伸长率分别提高了15%、42%和74%。

关键词(KeyWords)： 7A04铝合金;固溶处理;显微组织;力学性能;耐腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 陕西省教育厅专项科研计划资助项目(20JK0618);; 陕西省大学生创新创业训练计划项目(S202011396087);; 商洛市科技局科学技术研究发展计划项目(2020-Z-0083);; 商洛市高性能有色金属制备与加工技术创新团队(SK2019-75)

作者(Author): 张美丽,韩茜,李春,罗姝淑,王骞,高世豪

DOI: 10.13289/j.issn.1009-6264.2021-0632

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