李超超,何昊,周建文,等.Mn含量对Al7Si0.3Mg0.4Fe合金显微组织和力学性能的影响[J].精密成形工程,2025,17(3):123-131.
LI Chaochao,HE Hao,ZHOU Jianwen,et al.Effect of Mn Content on Microstructure and Mechanical Properties of Al7Si0.3Mg0.4Fe Alloy[J].Journal of Netshape Forming Engineering,2025,17(3):123-131. |
| Mn含量对Al7Si0.3Mg0.4Fe合金显微组织和力学性能的影响 |
| Effect of Mn Content on Microstructure and Mechanical Properties of Al7Si0.3Mg0.4Fe Alloy |
| 投稿时间：2024-06-04 |
| DOI：10.3969/j.issn.1674-6457.2025.03.014 |
| 中文关键词: Al7Si0.3Mg0.4Fe合金 Mn元素 显微组织 力学性能 富铁相 |
| 英文关键词: Al7Si0.3Mg0.4Fe alloy Mn microstructure mechanical properties iron-rich phase |
| 基金项目:HY行动项目(9A0AC64C) |
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| 摘要点击次数: 60 |
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| 中文摘要: |
| 目的 探究Mn含量对Al7Si0.3Mg0.4Fe合金富铁相组织形貌的演变规律，得到最适宜的Mn元素添加量，消除Fe元素对Al7Si0.3Mg0.4Fe合金的负面影响，提高合金的综合力学性能。方法 在Al7Si0.3Mg0.4Fe合金中添加不同含量的Mn，通过金相显微镜(OM)、扫描电子显微镜(SEM)、能谱分析(EDS)等表征方法对合金的显微组织进行分析，结合JMatPro相图模拟计算，探讨了Mn含量对Al7Si0.3Mg0.4Fe合金显微组织和力学性能的影响。结果 当Mn含量较低时，富铁相以针状β-Al5FeSi相为主，随着Mn含量的增加，β-Al5FeSi相向汉字状α-Al15(FeMn)3Si2相转变，当Mn的质量分数为0.32%时，β-Al5FeSi相基本消除，继续增加Mn元素含量，α-Al15(FeMn)3Si2相形貌由汉字状变为粗大的块状。结论 Al7Si0.3Mg0.4Fe合金的力学性能随Mn元素的添加先升高后降低，当添加0.32%(质量分数)的Mn时，Al7Si0.3Mg0.4Fe合金的综合力学性能最佳，屈服强度、抗拉强度、伸长率分别达到262 MPa、345 MPa、9%。 |
| 英文摘要: |
| The work aims to investigate the effect of Mn content on the microstructure and morphology of iron-rich phase of Al7Si0.3Mg0.4Fe alloy, obtain the most appropriate Mn content, eliminate the negative effect of Fe on Al7Si0.3Mg0.4Fe alloy, and improve the comprehensive mechanical properties of the alloy. Different contents of Mn were added to the Al7Si0.3Mg0.4Fe alloy, the microstructure of Al7Si0.3Mg0.4Fe alloy was analyzed by optical microscope (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and JMatPro phase diagram simulation calculation and the effect of Mn content on the microstructure and mechanical properties of Al7Si0.3Mg0.4Fe alloy was discussed. When Mn content was low, the iron-rich phase was mainly acicular β-Al5FeSi phase. With the increase of Mn content, β-Al5FeSi phase transformed into Chinese character-like α-Al15(FeMn)3Si2 phase. When Mn content was 0.32wt.%, β-Al5FeSi phase was basically eliminated, and the morphology of α-Al15(FeMn)3Si2 phase changed from Chinese character shape to thick block when Mn content continued to increase. The mechanical properties of Al7Si0.3Mg0.4Fe alloy increase firstly and then decrease with the addition of Mn. When 0.32wt.% Mn is added, the comprehensive mechanical properties of Al7Si0.3Mg0.4Fe alloy are the best, with the yield strength, tensile strength and elongation reaching 262 MPa, 345 MPa and 9.5%. |
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