低温冷轧与时效处理对Cu-Ni-Co-Si合金组织性能的影响

doi:10.13251/j.issn.0254-6051.2024.03.001

金属热处理 ›› 2024, Vol. 49 ›› Issue (3): 1-6.DOI: 10.13251/j.issn.0254-6051.2024.03.001

• 工艺研究 • 下一篇

低温冷轧与时效处理对Cu-Ni-Co-Si合金组织性能的影响

徐开泰, 刘骐升, 尤凯司, 刘照宇, 张峻嘉

东北大学材料科学与工程学院, 辽宁沈阳 110819

收稿日期:2023-09-27 修回日期:2024-01-05 出版日期:2024-03-25 发布日期:2024-04-24
通讯作者: 张峻嘉,副教授,博士,E-mail: zhangjj@mail.neu.edu.cn
作者简介:徐开泰(2001—),男,主要研究方向为高强高导铜合金,E-mail: Xukaitai226@foxmail.com。
基金资助:
松山湖材料实验室开放课题基金(2021SLABFN22)

Effect of low temperature cold rolling and aging on microstructure and properties of Cu-Ni-Co-Si alloy

Xu Kaitai, Liu Qisheng, You Kaisi, Liu Zhaoyu, Zhang Junjia

School of Materials Science and Engineering, Northeastern University, Shenyang Liaoning 110819, China

Received:2023-09-27 Revised:2024-01-05 Online:2024-03-25 Published:2024-04-24

摘要/Abstract

摘要： 研究了冷轧及时效工艺对Cu-1.8Ni-0.9Co-0.641Si合金板带材组织性能的影响。对比了液氮低温冷轧与室温冷轧对合金板材性能的影响,并通过X射线衍射仪(XRD)、扫描电镜(SEM)、透射电镜(TEM)等对其影响机制进行分析。结果表明,在时效60 min 时,室温冷轧与低温冷轧后合金板材硬度达到最大,分别为450 ℃时效的285.53 HV0.3和400 ℃时效的307.2 HV0.3。研究还发现随着时效温度的升高,合金的导电率随之升高,在经过500 ℃时效处理后,低温冷轧合金的导电率最高,能够达到60.11%IACS。在时效处理过程中,板材内部的位错密度降低,晶粒和晶界中出现了大量细小且均匀的纳米级(Ni,Co)₂Si有序相。与室温冷轧相比,经过低温冷轧的Cu-Ni-Co-Si合金组织更加细化,位错密度更高。

关键词: Cu-Ni-Co-Si合金, 低温冷轧, 时效, 微观组织, 力学性能

Abstract: Effect of cold rolling and aging process on microstructure and properties of Cu-1.8Ni-0.9Co-0.641Si alloy sheet and strip was studied. The effects of liquid nitrogen cold rolling and room temperature cold rolling on the properties of the alloy sheet were compared, and the mechanism was analyzed by X-ray diffractometer (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The results show that when the aging time is 60 min, the hardness of alloy sheet reaches the maximum after cold rolling at room temperature and low temperature, which are 285.53 HV0.3 at 450 ℃ and 307.2 HV0.3 at 400 ℃, respectively. It is also found that the conductivity of the alloy increases with the increase of aging temperature. After aging at 500 ℃, the conductivity of the low temperature cold rolled alloy is the highest, reaching 60.11%IACS. During the aging process, the dislocation density in the sheet decreases, and a large number of fine and uniform nanoscale (Ni,Co)₂Si ordered phases appear in the grains and on the grain boundaries. Compared with cold rolling at room temperature, the microstructure of the Cu-Ni-Co-Si alloy after low temperature cold rolling is finer and the dislocation density is higher.

Key words: Cu-Ni-Co-Si alloy, low temperature cold rolling, aging, microstructure, mechanical properties

中图分类号:

TG146

徐开泰, 刘骐升, 尤凯司, 刘照宇, 张峻嘉. 低温冷轧与时效处理对Cu-Ni-Co-Si合金组织性能的影响[J]. 金属热处理, 2024, 49(3): 1-6.

Xu Kaitai, Liu Qisheng, You Kaisi, Liu Zhaoyu, Zhang Junjia. Effect of low temperature cold rolling and aging on microstructure and properties of Cu-Ni-Co-Si alloy[J]. Heat Treatment of Metals, 2024, 49(3): 1-6.

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低温冷轧与时效处理对Cu-Ni-Co-Si合金组织性能的影响

Effect of low temperature cold rolling and aging on microstructure and properties of Cu-Ni-Co-Si alloy

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