选区激光熔化AlSi10Mg合金镜的表面性能  

Surface characteristics of selective laser melted AlSi10Mg mirrors

作　　者：韩潇[1,2] 康楠 焦建超 王超[1,2] HAN Xiao;KANG Nan;JIAO Jianchao;WANG Chao(Beijing Institute of Space Mechanics and Electricity,Beijing 100094,China;Beijing Key Laboratory of Advanced Optical Remote Sensing Technology,Beijing 100094,China;State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]北京空间机电研究所,北京100094 [2]先进光学遥感技术北京市重点实验室,北京100094 [3]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《中南大学学报（自然科学版）》2020年第11期3088-3092,共5页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(U1537105)。

摘　　要：基于激光增材制造技术适用于复杂轻量化结构光学元件的快速成形,且采用同种材料一体化光机结构能够降低空间光学成像系统的温度敏感性,提高稳定性,利用选区激光熔化(SLM)技术制备全铝空间光学相机用AlSi10Mg铝合金反射镜。研究结果表明:采用SLM制备的AlSi10Mg铝合金组织致密(相对密度大于99.5%),且退火后力学性能优异;通过单点金刚石车削(SPDT)获得光学级表面,表面粗糙度达8~13 nm,面形精度达到0.28λ(λ为波长,λ=632 nm)。该研究结果可以应用于空间光学反射镜的设计与制造。Considering that additive manufacturing(AM)technologies is adapted for the optical components with complex lightweight structure,using the opto-mechanical structure with the same material can reduce temperature sensitivity,selective laser melting(SLM)technology was utilized to fabricate the AlSi10Mg mirror for aluminum alloy space optical sensor.The results show that the relative density of as-fabricated AlSi10Mg sample is above 99.5%,and the tensile strength and the ductility are excellent.The single point diamond turning(SPDT)is applied to deliver the optical surface with thoughness of 8−13 nm and accuracy of 0.28λ(λ=632 nm).The results can be used to manufacture the lightweight space optical mirrors.

关 键 词：增材制造 选区激光熔化 铝镜 空间光学 表面性能 金刚石车削 

分 类 号：TB34[一般工业技术—材料科学与工程] TG113[金属学及工艺—物理冶金]