固溶处理对WE43稀土镁合金组织和性能的影响

doi:10.13251/j.issn.0254-6051.2025.05.026

金属热处理 ›› 2025, Vol. 50 ›› Issue (5): 168-174.DOI: 10.13251/j.issn.0254-6051.2025.05.026

固溶处理对WE43稀土镁合金组织和性能的影响

向雨欣, 何建丽, 王志海, 刘锦林

上海工程技术大学材料科学与工程学院, 上海 201620

收稿日期:2024-11-05 修回日期:2025-03-28 发布日期:2025-06-25
通讯作者: 何建丽,副教授,博士,E-mail:05140001@sues.edu.cn
作者简介:向雨欣(2000—),女,硕士研究生,主要研究方向为WE43稀土镁合金腐蚀与防护,E-mail:xyxin0228@163.com。
基金资助:
国家自然科学基金(51805313);上海市III类高峰学科—材料科学与工程(高能束智能加工与绿色制造)

Effect of solution treatment on microstructure and properties of WE43 rare earth magnesium alloy

Xiang Yuxin, He Jianli, Wang Zhihai, Liu Jinlin

School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

Received:2024-11-05 Revised:2025-03-28 Published:2025-06-25

摘要/Abstract

摘要： 将挤压态WE43稀土镁合金在525 ℃固溶4~12 h。采用光学显微镜(OM)、扫描电镜(SEM)、压缩试验以及电化学测试研究了固溶时间对WE43镁合金组织、力学性能和耐蚀性能的影响。结果表明,固溶处理后,合金中第二相基本溶入镁合金基体,仅残留部分具有高温稳定性的Mg-RE相沿晶界断续分布。与挤压态相比,固溶处理后合金抗压强度和屈服强度提高,但硬度值下降。固溶时间为8 h时,合金的力学性能和耐蚀性能达到最优。

关键词: WE43稀土镁合金, 固溶处理, 显微组织, 力学性能, 耐蚀性能

Abstract: As-extruded WE43 rare earth magnesium alloy was solution treated at 525 ℃ for 4-12 h. The effect of solution time on the microstructure, mechanical properties, and corrosion resistance of the WE43 magnesium alloy was studied by means of optical microscope (OM), scanning electron microscope (SEM), compression test and electrochemical test. The results show that after solution treatment, the second phase in the alloy is basically dissolved into the magnesium alloy matrix, and only a part of the Mg-RE phase with high temperature stability is discontinuously distributed along the grain boundary. Compared to the as-extruded alloy, the solution treated alloy exhibits enhanced compressive strength and yield strength, albeit with reduced hardness. The mechanical properties and corrosion resistance of the alloy are optimized after solution treatment for 8 h.

Key words: WE43 rare earth magnesium alloy, solution treatment, microstructure, mechanical properties, corrosion resistance

中图分类号:

TG146.2

向雨欣, 何建丽, 王志海, 刘锦林. 固溶处理对WE43稀土镁合金组织和性能的影响[J]. 金属热处理, 2025, 50(5): 168-174.

Xiang Yuxin, He Jianli, Wang Zhihai, Liu Jinlin. Effect of solution treatment on microstructure and properties of WE43 rare earth magnesium alloy[J]. Heat Treatment of Metals, 2025, 50(5): 168-174.

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固溶处理对WE43稀土镁合金组织和性能的影响

Effect of solution treatment on microstructure and properties of WE43 rare earth magnesium alloy

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