退火工艺对Al-Zr-Er系高导铝合金组织和性能的影响

doi:10.13251/j.issn.0254-6051.2021.09.018

金属热处理 ›› 2021, Vol. 46 ›› Issue (9): 108-115.DOI: 10.13251/j.issn.0254-6051.2021.09.018

退火工艺对Al-Zr-Er系高导铝合金组织和性能的影响

周泽宇¹, 肖翔¹, 郑志凯¹, 陈保安², 徐静³, 夏霏霏³

1.中铝材料应用研究院有限公司, 北京 102209;
2.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;
3.远东电缆有限公司, 江苏宜兴 214257

收稿日期:2021-04-26 出版日期:2021-09-25 发布日期:2021-12-09
通讯作者: 肖翔,高级工程师,E-mail:xiang_xiao@chalco.com.cn
作者简介:周泽宇(1991—),男,工程师,硕士,主要研究方向为先进铝合金材料制备及热处理工艺,E-mail:zhouzeyu@cmari.com。
基金资助:
北京市科委项目(Z181100005218002)

Effect of annealing process on microstructure and properties of Al-Zr-Er high conductivity aluminum alloy

Zhou Zeyu¹, Xiao Xiang¹, Zheng Zhikai¹, Chen Baoan², Xu Jing³, Xia Feifei³

1. Chinalco Materials Application Research Institute Co., Ltd., Beijing 102209, China;
2. State Key Laboratory of Advanced Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Beijing 102209, China;
3. Far East Cable Co., Ltd., Yixing Jiangsu 214257, China

Received:2021-04-26 Online:2021-09-25 Published:2021-12-09

摘要/Abstract

摘要： 采用硬度计、电导率测试仪、扫描电镜(SEM)研究了退火工艺对水冷铜模制备的Al-Zr-Er合金组织和性能的影响规律。结果表明:Er元素添加量由0增加至0.30wt%,Al-Zr-Er合金内的初生Al(Fe,Er)相逐渐增多,在退火过程中则会析出大量纳米级Al₃(Zr、Er) 相。在等时退火过程中,硬度和电导率会形成两个峰值位置,即300~400 ℃的Al₃Er析出峰和500~550 ℃位置的Al₃(Zr,Er) 粒子析出峰;退火工艺中,多级退火可以更充分形成核壳结构Al₃(Zr,Er)粒子,硬度提升显著;三级退火过程中固溶在基体内的Zr、Er元素析出更充分,电导率提升最显著。成分方面,在Al-0.10Zr-xEr合金中,添加0.15wt%Er表现出更优越的综合性能;在Al-yZr-0.15Er合金中添加Zr元素虽然会提高合金硬度,但由于Zr元素析出不充分带来电导率的损失。

关键词: Al-Zr-Er合金, 导体材料, 退火工艺, 微观组织, 性能

Abstract: Effect of annealing process on microstructure and properties of the Al-Zr-Er alloy prepared by water-cooled copper mold was studied by means of hardness tester, electrical conductivity gauge and scanning electron microscope. The results show that when the addition amount of Er increases from 0 to 0.30wt%, the primary Al (Fe,Er) phase in the Al-Zr-Er alloy increases gradually, and a large number of nano-sized Al₃ (Zr,Er) particles are precipitated during annealing. During the isochronous annealing process of Al-Zr-Er alloy, hardness and electrical conductivity exist two peak positions. The first peak is at 300-400 ℃ which represents the precipitation process of Al₃Er and the second peak is Al₃(Zr, Er) at 500-550 ℃ .In the annealing process, multi-stage annealing can more fully form Al₃ (Zr, Er) particles of core-shell structure, and the hardness is improved significantly. During the three-stage annealing process, Zr and Er elements in the matrix are more fully precipitated, and the conductivity is the highest. In terms of composition, the addition of 0.15wt%Er in the Al-0.10Zr-xEr alloy shows better comprehensive properties. Although adding Zr element to Al-yZr-0.15Er alloy will increase the hardness of the alloy, the insufficient precipitation of Zr element will lead to the loss of electrical conductivity.

Key words: Al-Zr-Er alloy, conductor material, annealing process, microstructure, properties

中图分类号:

TG156.2

周泽宇, 肖翔, 郑志凯, 陈保安, 徐静, 夏霏霏. 退火工艺对Al-Zr-Er系高导铝合金组织和性能的影响[J]. 金属热处理, 2021, 46(9): 108-115.

Zhou Zeyu, Xiao Xiang, Zheng Zhikai, Chen Baoan, Xu Jing, Xia Feifei. Effect of annealing process on microstructure and properties of Al-Zr-Er high conductivity aluminum alloy[J]. Heat Treatment of Metals, 2021, 46(9): 108-115.

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退火工艺对Al-Zr-Er系高导铝合金组织和性能的影响

Effect of annealing process on microstructure and properties of Al-Zr-Er high conductivity aluminum alloy

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