Research for Surface Characteristics of Aluminum Mirrors Made by Laser Additive Manufacturing

被引：2
作者：
Han, Xiao [1 ]
Kang, Nan [2 ]
Jiao, Jianchao [1 ]
Wang, Chao [1 ]
机构：
[1] Beijing Inst Space Mech & Elect, 104 YouYi Rd, Beijing 100094, Peoples R China
[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, 127 YouYi Western Rd, Xian 710072, Shaanxi, Peoples R China
来源：
AOPC 2019: ADVANCED LASER MATERIALS AND LASER TECHNOLOGY | 2019年 / 11333卷
基金：
中国国家自然科学基金;
关键词：
additive manufacturing; selective laser melting; aluminum mirror; space optical; surface characteristics; diamond turning; microstructure; annealing;
D O I：
10.1117/12.2548108
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Additive manufacturing (AM) enable new and innovative design forms that cannot be produced by conventional manufacturing methods. Space optical instruments are precision systems that require high resolution, light weight, low cost and short schedule. Metal AM technology is more adept to the fabrication of mirror blanks and support structures with complex shapes. In this study, selective laser melting (SLM) technology were utilized to create workpieces. The AlSi10Mg mirror blanks were fabricated with metallic powder bed fusion. After forming, post annealing process at 300 degrees C for 2 h was performed to relieve internal stresses. The microstructure of AlSi10Mg produced by SLM is compact, and the mechanical properties are much higher than the alloy formed by conventional casting. The single point diamond turning (SPDT) was been applied to deliver optical quality mirror. The surface characteristics of AM components have been measured. The turning surface meets the 8 similar to 11nm RMS and 1.05 lambda PV. This research can be used for the manufacturing of lightweight space optical mirrors and improve overall process efficiency.
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页数：6
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