固溶时间对2219铝合金组织和力学性能的影响

doi:10.13251/j.issn.0254-6051.2023.07.026

金属热处理 ›› 2023, Vol. 48 ›› Issue (7): 152-156.DOI: 10.13251/j.issn.0254-6051.2023.07.026

固溶时间对2219铝合金组织和力学性能的影响

王会敏, 李炎光, 吴静依

河南工学院材料科学与工程学院, 河南新乡 453003

收稿日期:2023-03-12 修回日期:2023-06-02 出版日期:2023-07-25 发布日期:2023-09-04
作者简介:王会敏(1983—),男,讲师,博士,主要研究方向为金属材料塑性成形及热处理,E-mail:wanghuimin12@126.com。
基金资助:
河南省科技攻关项目(222102230021);河南省高校重点科研项目(21B430003)

Effect of solution time on microstructure and mechanical properties of 2219 aluminum alloy

Wang Huimin, Li Yanguang, Wu Jingyi

Material Science and Engineering School, Henan Institute of Technology, Xinxiang Henan 453003, China

Received:2023-03-12 Revised:2023-06-02 Online:2023-07-25 Published:2023-09-04

摘要/Abstract

摘要： 通过力学性能测试、扫描电镜(SEM)、示差扫描量热法(DSC)和XRD分析等方法,研究固溶时间对2219铝合金组织和力学性能的影响。结果表明,当固溶温度为535 ℃,固溶时间不超过1.5 h时,随着固溶时间的延长,基体中含Cu结晶相回溶至基体,且不发生偏聚,提高了基体的过饱和度,有利于合金力学性能的提高;当固溶时间超过2 h时,含Cu结晶相发生偏聚长大,导致合金的力学性能特别是伸长率下降。因此,当固溶温度为535 ℃时,该合金适宜的固溶时间为1.5 h,之后经过(175 ℃×18 h)时效处理后,合金的抗拉强度R_m、屈服强度R_p0.2和断后伸长率A分别为393.5 MPa、305.9 MPa和8.7%。

关键词: 2219铝合金, 固溶时间, 力学性能, 显微组织

Abstract: Effect of solution time on microstructure and mechanical properties of 2219 aluminum alloy was studied by means of mechanical properties testing, scanning electron microscope (SEM), differential scanning calorimetry (DSC) and XRD analysis. The results show that, when the solution time is less than 1.5 h at 535 ℃, the primary phases dissolve in matrix and improve the supersaturation of the matrix with the solution time increasing, which is conducive to the improvement of mechanical properties of the alloy. When the solution time exceeds 2 h, the Cu-rich phases undergo segregation and grow up, resulting in the decrease of mechanical properties, especially elongation of the alloy. Therefore, the suitable solution treatment time of the alloy is 1.5 h at 535 ℃. After peak aging at 175 ℃ for 18 h, the ultimate tensile strength, yield strength and elongation of the aluminum alloy are 393.5 MPa、305.9 MPa and 8.7%, respectively.

Key words: 2219 aluminum alloy, solution time, mechanical properties, microstructure

中图分类号:

TG146

王会敏, 李炎光, 吴静依. 固溶时间对2219铝合金组织和力学性能的影响[J]. 金属热处理, 2023, 48(7): 152-156.

Wang Huimin, Li Yanguang, Wu Jingyi. Effect of solution time on microstructure and mechanical properties of 2219 aluminum alloy[J]. Heat Treatment of Metals, 2023, 48(7): 152-156.

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固溶时间对2219铝合金组织和力学性能的影响

Effect of solution time on microstructure and mechanical properties of 2219 aluminum alloy

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