激光3D打印AlSi10Mg铝合金点阵结构材料的组织和力学性能

doi:10.13251/j.issn.0254-6051.2020.09.027

金属热处理 ›› 2020, Vol. 45 ›› Issue (9): 142-148.DOI: 10.13251/j.issn.0254-6051.2020.09.027

激光3D打印AlSi10Mg铝合金点阵结构材料的组织和力学性能

刘佩玲¹, 陈康敏¹, 赵振华²

1.江苏大学材料科学与工程学院,江苏镇江 212013;
2.南京航空航天大学能源与动力学院,江苏南京 210016

收稿日期:2020-03-28 出版日期:2020-09-25 发布日期:2020-12-29
通讯作者: 陈康敏,副教授,E-mail:476964220@qq.com
作者简介:刘佩玲(1994—),女,硕士研究生,主要研究方向为金属材料,E-mail:245507564@qq.com

Microstructure and mechanical properties of laser 3D printedAlSi10Mg aluminum alloy lattice materials

Liu Peiling¹, Chen Kangmin¹, Zhao Zhenhua²

1. School of Materials Science and Engineering,Jiangsu University,Zhenjiang Jiangsu 212013,China;
2. School of Energy and Power,Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu 210016,China

Received:2020-03-28 Online:2020-09-25 Published:2020-12-29

摘要/Abstract

摘要： 以不同激光3D打印参数制备了AlSi10Mg铝合金点阵结构材料,探索其最优化打印参数,研究了铝合金点阵结构材料的组织和性能,以及后续热处理对其组织性能的影响。结果表明,最优化打印参数为:环境温度80 ℃,粉层厚度30 μm,激光束直径80 μm,激光能量370 W,激光扫描速度1300 mm/s。制备的铝合金点阵结构材料空洞缺陷少,致密性高,显微组织呈一层层交错堆垛的激光熔池,为细小的α-Al等轴胞状晶和球状Si颗粒相组成,性能良好。经热处理后,原激光熔池缺陷、等轴胞状晶特征消失,Si颗粒相不断析出并长大,硬度和静态压缩试验下的平台应力降低,压缩性能下降。

关键词: 激光3D打印, AlSi10Mg合金, 点阵结构材料, 显微组织, 力学性能

Abstract: AlSi10Mg aluminum alloy lattice materials were prepared by selecting different laser 3D printing parameters,and the optimized printing parameters were explored.The microstructure and properties of aluminum alloy lattice materials and the influence of subsequent heat treatment on it were studied.The results show that the optimal printing parameters include printing temperature (80 ℃),microns powder layer thickness (30 μm),lasing beam diameter (80 μm),laser energy(370 W),and laser scanning speed (1300 mm/s).The prepared aluminum alloy lattice material has few cavity defects,high compactness,and the microstructure is a layer upon layer crisscrossing laser molten pool,which is composed of small α-Al equiaxial cellular crystal and spherical Si particle phase,and has good performance.After heat treatment,the features of the original laser molten pool defects and equiaxial cellular crystals disappear,the Si particle phase continuously precipitates and grows up,meantime,the hardness and platform stress decrease under the compression performance,so does the static compression properties.

Key words: laser 3D printing, AlSi10Mg alloy, lattice structure materials, microstructure, mechanical properties

中图分类号:

U671.6

刘佩玲, 陈康敏, 赵振华. 激光3D打印AlSi10Mg铝合金点阵结构材料的组织和力学性能[J]. 金属热处理, 2020, 45(9): 142-148.

Liu Peiling, Chen Kangmin, Zhao Zhenhua. Microstructure and mechanical properties of laser 3D printedAlSi10Mg aluminum alloy lattice materials[J]. Heat Treatment of Metals, 2020, 45(9): 142-148.

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激光3D打印AlSi10Mg铝合金点阵结构材料的组织和力学性能

Microstructure and mechanical properties of laser 3D printedAlSi10Mg aluminum alloy lattice materials

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