陈海燕,邓权威,潘美诗,黄小汉,龙协,王超,曾樊升

• 1:广东工业大学材料与能源学院
• 2:珠海富士智能股份有限公司

摘要(Abstract)：

采用Sb和Eu对4047铝合金进行变质处理，研究了Sb或Eu单独变质及Sb和Eu复合变质对合金的组织、力学性能、导电率和导热性的影响。采用扫描电镜、X射线衍射仪、拉伸试验、涡流导电仪和闪光导热仪等分析了合金变质前后的组织、物相、力学性能及导电导热性能。结果表明：4047铝合金中的Si相呈长条状、多边形状及针状，合金的导电性和力学性能较差；使用0.2%～0.8%Sb单独变质时，随着Sb添加量的增加，Si相逐渐被细化为条状和颗粒状，当Sb添加量为0.6%时，合金的性能最佳；使用0.2%～0.8%Eu单独变质时，随着Eu添加量的增加，Si相逐渐变质成纤维状，当Eu添加量为0.6%时，合金的性能最佳；使用(0.6%Sb+0.6%Eu)复合变质后合金中的Si相呈丛簇小球颗粒状，比单独Sb或Eu变质的Si相更细小均匀，α-Al和Si相生长呈多向性，复合变质后合金的晶格畸变有所降低，合金的抗拉强度和伸长率分别为222.30 MPa和2.2%,导电率和热扩散系数分别为46.60%IACS和79.000 mm~2/s;与变质前的4047合金相比，变质后合金的抗拉强度和伸长率分别提高了85.22%和144.44%,导电率和导热性分别提高了67.93%和8.22%。

关键词(KeyWords)： 4047铝合金;变质;力学性能;导电率;导热性能

Abstract:

Keywords:

基金项目(Foundation): 广东工业大学大学生创新训练项目(xj2023118450622)

作者(Author): 陈海燕,邓权威,潘美诗,黄小汉,龙协,王超,曾樊升

DOI: 10.13289/j.issn.1009-6264.2023-0292

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