Transactions of Materials and Heat Treatment

Title：Research on support structure for AlSi10Mg aluminum alloy parts by selective laser melting

Authors： He Xianding Wu Ling An Zhiguo

Unit： Chengdu Aeronautic Polytechnic Chongqing Huagang Technology Co. Ltd. Chongqing Jiaotong University

KeyWords： selective laser melting porous aluminum alloy placement type support structure dimensional accuracy

ClassificationCode：TG456.7

year,vol(issue):pagenumber：2020,45(9):113-117

Abstract：

In order to investigate the influences of different placement types and support structures on the dimensional accuracy of aluminum alloy parts formed by selective laser melting (SLM), the parking trigger part of an unmanned aerial vehicle was studied, and through the analysis of forming process, three kinds of placement types suitable for SLM process were purposed. Then, two kinds of support structures were designed, and the process tests were carried out on six combinations of placement types and supporting structures. Furthermore, the different parts obtained from test were compared in four aspects of support volume, separate printing time, support surface area and proportion of surface area for parts, and the parts after removing the supports were conducted by 3D laser scanning and error analysis. The results show that for a type of vertical installation, the support volume and the designed supporting surface are the smallest, and the surface effect and the forming accuracy are the best. When the laser power is 400 W, the scanning speed is 1100 mm·s-1, the powder-bed depth is 50 μm, and the scanning spacing is 110 μm, the positive and negative deviations of parts are controlled within 0.3 mm.

Funds：

四川省教育厅自然科学基金资助项目（18ZA0033）

何先定(1972-)，男，学士,副教授 E-mail：hawe@21cn.com 通讯作者：安治国(1976-)，男，博士，副教授 E-mail：azgcqu@163.com

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