脉冲磁场对7A04铝合金固溶工艺显微组织和力学性能的影响

doi:10.13251/j.issn.0254-6051.2022.09.011

金属热处理 ›› 2022, Vol. 47 ›› Issue (9): 60-64.DOI: 10.13251/j.issn.0254-6051.2022.09.011

脉冲磁场对7A04铝合金固溶工艺显微组织和力学性能的影响

程桥¹, 王军¹, 徐良², 田建明², 陈重毅¹, 麻永林¹

1.内蒙古科技大学材料与冶金工程学院(稀土学院), 内蒙古包头 014000;
2.包头铝业有限公司, 内蒙古包头 014000

收稿日期:2022-05-27 修回日期:2022-07-18 发布日期:2022-10-18
通讯作者: 麻永林,教授,博士,E-mail:724555691@qq.com
作者简介:程桥(1996—),男,硕士研究生,主要研究方向为脉冲磁场对7A04铝合金热处理的影响,E-mail:1441170041@qq.com。
基金资助:
内蒙古自治区自然科学基金(2020MS06046)

Effect of pulsed magnetic field on microstructure and mechanical properties of 7A04 aluminum alloy under solution treatment

Cheng Qiao¹, Wang Jun¹, Xu Liang², Tian Jianming², Chen Zhongyi¹, Ma Yonglin¹

1. School of Materials and Metallurgical Engineering, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014000, China;
2. Baotou Aluminum Co. , Ltd. , Baotou Inner Mongolia 014000, China

Received:2022-05-27 Revised:2022-07-18 Published:2022-10-18

摘要/Abstract

摘要： 通过光学显微镜、扫描电镜、维氏硬度计、万能试验机,研究了脉冲磁场工艺参数对7A04铝合金固溶工艺下显微组织和力学性能的影响。结果表明,脉冲磁场可促进S相的分解并加速其合金元素的扩散,从而得到饱和度更好的固溶体组织。经过脉冲磁场固溶处理60 min后,固溶态7A04铝合金的抗拉强度提升约96 MPa,显微硬度提升约20 HV5,伸长率下降了约0.9%。分析认为,脉冲磁场在7A04铝合金固溶处理过程中,通过降低溶质原子的扩散激活能而提高扩散系数,加速了固溶过程,从而缩短了固溶时间。

关键词: 脉冲磁场, S相, 7A04铝合金, 固溶工艺

Abstract: Effect of pulsed magnetic field parameters on the microstructure and mechanical properties of 7A04 aluminum alloy under solution treatment was investigated by means of optical microscope, scanning electron microscope, Vickers hardness tester and universal testing machine. The results show that the pulsed magnetic field can promote the decomposition of S phase and accelerate the diffusion of its alloying elements, so as to obtain the solid solution structure with better saturation. After pulsed magnetic field solution treatment of 60 min, the tensile strength of the solution treated 7A04 aluminum alloy is increased by about 96 MPa, the microhardness is increased by about 20 HV50, and the elongation is decreased by about 0.9%. In the process of solution treatment of 7A04 aluminum alloy, the pulsed magnetic field is increasing the diffusion coefficient by reducing the diffusion activation energy of solute atoms, the solution process is accelerated, so that the solution treatment time is shortened.

Key words: pulsed magnetic field, S phase, 7A04 aluminum alloy, solution treatment process

中图分类号:

TG148

程桥, 王军, 徐良, 田建明, 陈重毅, 麻永林. 脉冲磁场对7A04铝合金固溶工艺显微组织和力学性能的影响[J]. 金属热处理, 2022, 47(9): 60-64.

Cheng Qiao, Wang Jun, Xu Liang, Tian Jianming, Chen Zhongyi, Ma Yonglin. Effect of pulsed magnetic field on microstructure and mechanical properties of 7A04 aluminum alloy under solution treatment[J]. Heat Treatment of Metals, 2022, 47(9): 60-64.

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脉冲磁场对7A04铝合金固溶工艺显微组织和力学性能的影响

Effect of pulsed magnetic field on microstructure and mechanical properties of 7A04 aluminum alloy under solution treatment

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