水平连铸铜铝复合板带界面Al–17at%Cu共晶合金热变形行为

王珺; 赵帆; 解国良; 徐佳璇; 刘新华

doi:10.1007/s12613-021-2276-4

Volume 29 Issue 8

Aug. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(8): 1578-1588

Jun Wang, Fan Zhao, Guoliang Xie, Jiaxuan Xu, and Xinhua Liu, Hot compressive deformation of eutectic Al–17at% Cu alloy on the interface of the Cu–Al composite plate produced by horizontal continuous casting, Int. J. Miner. Metall. Mater., 29(2022), No. 8, pp. 1578-1588. https://doi.org/10.1007/s12613-021-2276-4

Cite this article as:

Jun Wang, Fan Zhao, Guoliang Xie, Jiaxuan Xu, and Xinhua Liu, Hot compressive deformation of eutectic Al–17at% Cu alloy on the interface of the Cu–Al composite plate produced by horizontal continuous casting, Int. J. Miner. Metall. Mater., 29(2022), No. 8, pp. 1578-1588. https://doi.org/10.1007/s12613-021-2276-4

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研究论文

水平连铸铜铝复合板带界面Al–17at%Cu共晶合金热变形行为

1)
北京科技大学新材料技术研究院材料先进制备技术教育部重点实验室，北京 100083，中国
2)
北京科技大学新金属材料国家重点实验室，北京 100083，中国

通讯作者:
刘新华 E-mail: Liuxinhua18@163.com

文章亮点

(1) 探究了冷却速率对Al–17at%Cu共晶合金组织的影响规律。

(2) 分析了Al–17at%Cu共晶合金的热变形行为并建立其流变应力本构方程。

(3) 提出了铜铝双金属复合板材塑性变形过程中界面的演变过程。

中文摘要

铜铝双金属复合板材具有纯铜的高导电导热和纯铝的轻质廉价等特性，可代替铜合金制品应用于航空航天、交通运输和装饰建材等领域，解我国铜资源短缺、严重依赖进口之危，缓铝产能过剩、资源严重流失之困，近年来受到人们的广泛关注。在众多铜铝双金属复合板材的制备技术中，连铸复合直接成形技术实现了铜铝双金属复合板材铸造、复合和成形的一体化，生产流程短、效率高，板材界面结合强度高，具有较为广阔的发展前景。水平连铸制备的铜铝复合板带界面中共晶组织层厚度占界面总厚度的90%以上，其在后续轧制成形加工中的变形行为对成形后复合板带的质量影响显著。本文通过改变铸锭凝固时的冷却速率，制备铜铝复合板带界面共晶组织材料，研究其在热压缩过程中的变形行为。研究结果表明：当变形温度大于300°C时，共晶组织中α-Al的动态再结晶软化作用大于加工硬化作用，共晶组织发生均匀的塑性变形。并采用Arrhenius型双曲正弦模型建立了共晶组织流变应力本构方程，为铜铝复合板带的加工成形过程提供可靠的理论依据。

关键词:

Research Article

Hot compressive deformation of eutectic Al–17at% Cu alloy on the interface of the Cu–Al composite plate produced by horizontal continuous casting

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Abstract

Abstract

On the interface of the Cu–Al composite plate from horizontal continuous casting, the eutectic microstructure layer thickness accounts for more than 90% of the total interface thickness, and the deformation in rolling forming plays an important role in the quality of the composite plate. The eutectic microstructure material on the interface of the Cu–Al composite plate was prepared by changing the cooling rate of ingot solidification and the deformation in hot compression was investigated. The results show that when the deformation temperature is over 300°C, the softening effect of dynamic recrystallization of α-Al is greater than the hardening effect, and uniform plastic deformation of eutectic microstructure is caused. The constitutive equation of flow stress in the eutectic microstructure layer was established by Arrhenius hyperbolic-sine mathematics model, providing a reliable theoretical basis for the deformation of the Cu–Al composite plate.
- horizontal continuous casting;
- copper–aluminium composite plate;
- composite interface;
- eutectic microstructure material;
- hot deformation experiments;
- constitutive equation

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References

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