化学成分对高强Al-Mg-Si合金组织和性能的影响

doi:10.13251/j.issn.0254-6051.2022.04.005

金属热处理 ›› 2022, Vol. 47 ›› Issue (4): 30-38.DOI: 10.13251/j.issn.0254-6051.2022.04.005

化学成分对高强Al-Mg-Si合金组织和性能的影响

陈保安^1,2, 张静媛^1,2, 祝志祥^1,2, 韩钰^1,2, 潘学东^1,2, 张磊³, 陈素红³

1.全球能源互联网研究院有限公司先进输电技术国家重点实验室, 北京 102209;
2.全球能源互联网研究院有限公司电工新材料研究所, 北京 102209;
3.国网山东省电力公司电力科学研究院, 山东济南 250003

收稿日期:2021-12-18 修回日期:2022-01-28 出版日期:2022-04-25 发布日期:2022-05-19
作者简介:陈保安(1981—),男,高级工程师,博士,主要研究方向为电工导体材料,E-mail:dzcba@163.com
基金资助:
国家电网有限公司总部科技项目(5500-201958415A-0-0-00)

Effect of chemical composition on microstructure and properties of high strength Al-Mg-Si alloy

Chen Baoan^1,2, Zhang Jingyuan^1,2, Zhu Zhixiang^1,2, Han Yu^1,2, Pan Xuedong^1,2, Zhang Lei³, Chen Suhong³

1. State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Beijing 102209, China;
2. Department of Electrical Engineering New Materials, Global Energy Interconnection Research Institute Co., Ltd., Beijing 102209, China;
3. Electric Power Research Institute of State Grid Shandong Electric Power Company, Ji'nan Shandong 250003, China

Received:2021-12-18 Revised:2022-01-28 Online:2022-04-25 Published:2022-05-19

摘要/Abstract

摘要： 通过电子拉伸试验机、扫描电镜、透射电镜等研究了5种不同合金成分对高强Al-Mg-Si合金组织和性能的影响。结果发现,5种 Al-Mg-Si合金微观组织、力学性能以及导电性能都强烈依赖于合金中Mg和Si含量。随着Mg、Si含量的增加,合金的抗拉强度增加,同时导电率呈现下降的趋势。Al-0.7Mg-0.5Si和Al-0.6Mg-0.6Si相比,虽然两种合金的Mg、Si原子总量相当,但是由于Mg/Si比不同,导致二者微观组织明显不同,性能存在明显的差异。Ce微合金化使Al-0.7Mg-0.6Si-0.2Ce合金的力学性能和电学性能获得良好的匹配,175 ℃时效4 h的抗拉强度达到325 MPa,同时导电率达到56.2%IACS。

关键词: Al-Mg-Si合金, 微观组织, 力学性能, 导电率

Abstract: Effect of alloy composition on microstructure and properties of five kinds of Al-Mg-Si alloys was investigated by using universal tensile testing machine, SEM, TEM, etc. The results show that the microstructure, mechanical properties and conductivity of the five alloys are strongly depended on the Mg and Si contents. With increase of Mg and Si contents, the tensile strength of the alloy increases, whereas the conductivity tends to decrease. Although the total atoms of Mg and Si are equal for the Al-0.7Mg-0.5Si and Al-0.6Mg-0.6Si alloys, the different ratios of Mg to Si between the two alloys lead to distinct microstructure, so causing obvious difference in their performance. The Ce-microalloyed Al-0.7Mg-0.6Si-0.2Ce alloy aged at 175 ℃ for 4 h exhibits a good combination between mechanical properties and electrical properties, the tensile strength is up to 325 MPa, and the electrical conductivity is 56.2%IACS.

Key words: Al-Mg-Si alloy, microstructure, mechanical properties, electrical conductivity

中图分类号:

TG244.2

陈保安, 张静媛, 祝志祥, 韩钰, 潘学东, 张磊, 陈素红. 化学成分对高强Al-Mg-Si合金组织和性能的影响[J]. 金属热处理, 2022, 47(4): 30-38.

Chen Baoan, Zhang Jingyuan, Zhu Zhixiang, Han Yu, Pan Xuedong, Zhang Lei, Chen Suhong. Effect of chemical composition on microstructure and properties of high strength Al-Mg-Si alloy[J]. Heat Treatment of Metals, 2022, 47(4): 30-38.

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化学成分对高强Al-Mg-Si合金组织和性能的影响

Effect of chemical composition on microstructure and properties of high strength Al-Mg-Si alloy

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