固溶时效处理对Al-Cu-Mn-Er铸造合金力学性能和显微组织的影响

doi:10.13251/j.issn.0254-6051.2022.06.002

金属热处理 ›› 2022, Vol. 47 ›› Issue (6): 7-12.DOI: 10.13251/j.issn.0254-6051.2022.06.002

固溶时效处理对Al-Cu-Mn-Er铸造合金力学性能和显微组织的影响

吴杨¹, 黄晖¹, 石薇², 文胜平¹, 吴晓蓝¹, 荣莉¹, 魏午¹

1.北京工业大学新型功能材料教育部重点实验室, 北京 100124;
2.广东腐蚀科学与技术创新研究院, 广东广州 510530

收稿日期:2022-03-12 修回日期:2022-04-11 出版日期:2022-06-25 发布日期:2022-07-05
通讯作者: 魏午,讲师,博士,E-mail:weiwu@bjut.edu.cn
作者简介:吴杨(1997—),男,硕士研究生,主要研究方向为高性能铝合金,E-mail:619928134@qq.com。
基金资助:
北京市教委科研计划(KM202110005010)

Effects of solution and aging treatments on mechanical properties and microstructure of Al-Cu-Mn-Er cast alloy

Wu Yang¹, Huang Hui¹, Shi Wei², Wen Shengping¹, Wu Xiaolan¹, Rong Li¹, Wei Wu¹

1. Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, China;
2. Institute of Corrosion Science and Technology, Guangzhou Guangdong 510530, China

Received:2022-03-12 Revised:2022-04-11 Online:2022-06-25 Published:2022-07-05

摘要/Abstract

摘要： 通过光学显微镜、扫描电镜、XRD、DSC测试、硬度测试和拉伸试验等,研究了不同固溶时效处理对Al-Cu-Mn-Er合金显微组织和力学性能的影响。结果表明,铸态合金的最佳固溶时效制度为540 ℃固溶12 h、185 ℃时效6 h。该固溶制度下无过热或“过烧”现象,溶质原子充分扩散,铸造过程产生的残留相大量回溶基体,此时,合金硬度值最高,为142.28 HV0.1,抗拉强度为370.37 MPa,屈服强度为300.34 MPa,伸长率为6.50%。

关键词: Al-Cu-Mn-Er铸造合金, 固溶处理, 时效处理, 力学性能

Abstract: Effects of different solution and aging treatments on microstructure and mechanical properties of Al-Cu-Mn-Er alloy were studied by optical microscope, scanning electron microscope, XRD, DSC test, hardness test and tensile test. The results show that the optimal process of solution and aging treatments of the as-cast alloy is solution treating at 540 ℃ for 12 h and aging at 185 ℃ for 6 h, under which there is no overheating or "overburning" phenomena, the solute atoms are fully diffused, and a large amount of residual phases generated during the casting process are redissolved into the matrix. Meanwhile, the alloy has the highest hardness value of 142.28 HV0.1, tensile strength of 370.37 MPa, yield strength of 300.34 MPa, and elongation of 6.50%.

Key words: Al-Cu-Mn-Er cast alloy, solid solution treatment, aging treatment, mechanical properties

中图分类号:

TG166.3

吴杨, 黄晖, 石薇, 文胜平, 吴晓蓝, 荣莉, 魏午. 固溶时效处理对Al-Cu-Mn-Er铸造合金力学性能和显微组织的影响[J]. 金属热处理, 2022, 47(6): 7-12.

Wu Yang, Huang Hui, Shi Wei, Wen Shengping, Wu Xiaolan, Rong Li, Wei Wu. Effects of solution and aging treatments on mechanical properties and microstructure of Al-Cu-Mn-Er cast alloy[J]. Heat Treatment of Metals, 2022, 47(6): 7-12.

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固溶时效处理对Al-Cu-Mn-Er铸造合金力学性能和显微组织的影响

Effects of solution and aging treatments on mechanical properties and microstructure of Al-Cu-Mn-Er cast alloy

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