固溶处理对铸态Mg-4.8Al-2.7Ca-0.4Mn合金组织及力学性能的影响

doi:10.13251/j.issn.0254-6051.2022.11.009

金属热处理 ›› 2022, Vol. 47 ›› Issue (11): 59-63.DOI: 10.13251/j.issn.0254-6051.2022.11.009

固溶处理对铸态Mg-4.8Al-2.7Ca-0.4Mn合金组织及力学性能的影响

王金伟^1,2, 周吉学¹, 唐守秋¹, 吴建华¹, 张琳琳¹, 庄海华¹, 马百常^1,3

1.齐鲁工业大学(山东省科学院) 山东省科学院新材料研究所山东省轻质高强金属材料省级重点实验室, 山东济南 250014;
2.山东山科控股集团有限公司, 山东济南 250014;
3.山东山科智镁新材料科技有限公司, 山东济南 250014

收稿日期:2022-06-13 修回日期:2022-09-15 出版日期:2022-11-25 发布日期:2023-01-04
通讯作者: 周吉学,研究员,E-mail:zhoujx@sdas.org
作者简介:王金伟(1989—),男,助理研究员,硕士,主要研究方向为轻质高强合金设计及制备,E-mail:wangjw@sdscicom.com。
基金资助:
山东省重点研发计划(国际科技合作)(2019GHZ019);济南市高校院所科研人员创业计划(2021GXRC126)

Effect of solution treatment on microstructure and mechanical properties of as-cast Mg-4.8Al-2.7Ca-0.4Mn alloy

Wang Jinwei^1,2, Zhou Jixue¹, Tang Shouqiu¹, Wu Jianhua¹, Zhang Linlin¹, Zhuang Haihua¹, Ma Baichang^1,3

1. Shandong Provincial Key Laboratory for High Strength Lightweight Metallic Materials, Advanced Materials Institute, Qilu University of Technology(Shandong Academy of Sciences), Jinan Shandong 250014, China;
2. Shandong Scicom Group Co., Ltd., Jinan Shandong 250014, China;
3. Shandong Shankezhimei New Material Technology Co., Ltd., Jinan Shandong 250014, China

Received:2022-06-13 Revised:2022-09-15 Online:2022-11-25 Published:2023-01-04

摘要/Abstract

摘要： 采用光学显微镜、扫描电镜、X射线能谱仪、X射线衍射仪、硬度测试及拉伸性能测试等手段分别研究了铸态Mg-4.8Al-2.7Ca-0.4Mn合金固溶处理前后的组织演变及力学性能。结果表明,铸态Mg-4.8Al-2.7Ca-0.4Mn合金的微观组织中,α-Mg相呈现典型的枝晶形态,枝晶间分布着大量在凝固过程中形成的Al₂Ca相;固溶处理对第二相的形貌有显著影响,随着固溶时间的增加,枝晶偏析减弱,Al₂Ca相从网状分布演变为多边形或细块状;经500 ℃固溶4 h,合金具有较好的综合拉伸性能,抗拉强度、屈服强度及伸长率分别达到222.0 MPa、182.5 MPa和4.5%。

关键词: 固溶处理, Mg-4.8Al-2.7Ca-0.4Mn合金, Al₂Ca相, 显微组织, 力学性能

Abstract: Microstructure evolution and mechanical properties of as-cast and solution treated Mg-4.8Al-2.7Ca-0.4Mn alloy were investigated by means of optical microscope, scanning electron microscope, X-ray energy spectrometer, X-ray diffractometer, hardness test and tensile property test, respectively. The results show that the α-Mg phase in the microstructure of as-cast Mg-4.8Al-2.7Ca-0.4Mn alloy presents typical dendrite morphology, and a large amount of Al₂Ca phases formed during solidification are distributed among dendrites. The solution treatment has a significant influence on the morphology of second phases. With the increase of solution treatment time, the dendrite segregation is weakened, and the Al₂Ca phase changes from reticular distribution to polygonal or fine blocky. The alloy solution treated at 500 ℃ for 4 h exhibits good comprehensive tensile properties, with the tensile strength of 222.0 MPa, the yield strength of 182.5 MPa, and the elongation of 4.5%.

Key words: solution treatment, Mg-4.8Al-2.7Ca-0.4Mn alloy, Al₂Ca phase, microstructure, mechanical properties

中图分类号:

TG146.2

王金伟, 周吉学, 唐守秋, 吴建华, 张琳琳, 庄海华, 马百常. 固溶处理对铸态Mg-4.8Al-2.7Ca-0.4Mn合金组织及力学性能的影响[J]. 金属热处理, 2022, 47(11): 59-63.

Wang Jinwei, Zhou Jixue, Tang Shouqiu, Wu Jianhua, Zhang Linlin, Zhuang Haihua, Ma Baichang. Effect of solution treatment on microstructure and mechanical properties of as-cast Mg-4.8Al-2.7Ca-0.4Mn alloy[J]. Heat Treatment of Metals, 2022, 47(11): 59-63.

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固溶处理对铸态Mg-4.8Al-2.7Ca-0.4Mn合金组织及力学性能的影响

Effect of solution treatment on microstructure and mechanical properties of as-cast Mg-4.8Al-2.7Ca-0.4Mn alloy

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