电磁耦合场对星载弹性元件结构和性能的影响  

Influence of electromagnetic coupling field on the structure and performance of spaceborne spring

作　　者：华雄 肖勇[1] 高翔[1] 王辉[1] 邱冬生 王勇[1] HUA Xiong;XIAO Yong;GAO Xiang;WANG Hui;QIU Dongsheng;WANG Yong(China Academy of Space technology(Xi′an),Xi′an 710199,China;Wuhan Jingtai Technology Co.,Ltd.,Wuhan 430056,China)

机构地区：[1]中国空间技术研究院西安分院,西安710199 [2]武汉晶泰科技股份有限公司,430056

出　　处：《中国空间科学技术》2024年第1期89-98,共10页Chinese Space Science and Technology

基　　金：国家自然科学基金(U20B2033)。

摘　　要：星载可展天线广泛使用了弹性元件,这些弹性元件机械性能的一致性和稳定性对天线的展开和正常服役至关重要,是可展天线产品满足形面精度指标要求的重要支撑。采用宏观和微观试验相结合的方法,旨在探究电磁场对弹性元件结构和性能的影响,分析其影响机制,为提升星载弹性元件机械性能的一致性和稳定性提供新的途径。研究发现电磁耦合场能够在不改变原有产品精度等级及内部成分的情况下,将星载弹性元件刚度提升2.11%,刚度分布方差降低一个数量级;显微硬度最大可提升8.42%,硬度方差分布下降40.79%;抗蠕变性能提高45.76%,在强化机械性能的同时提高弹簧刚度分布和硬度分布的均匀性,减小个体差异。另外金相微观组织的观测结果显示电磁耦合场对弹簧机械性能的改善具有细晶强化和沉淀强化的作用。电磁耦合强化对提高星载弹性元件结构的性能稳定性和一致性具有重要影响,该技术在未来航天领域具有良好前景。Elastic elements are widely applied in the spaceborne deployable antenna.The consistency and stability of the mechanical properties of these elastic elements are crucial for the deployment and normal service of the antenna.The surface accuracy of the deployable antenna is ensured with the normal operation of these springs.The investigation is on the influence of electromagnetic coupling treatment on the structure and performance of the spaceborne spring.A combination of macroscopic and microscopic experiments was used to explore the influence of electromagnetic fields on the structure and performance of elastic components.With the analysis of the results and influence mechanism,this work provides a novel method to improve the consistency and stability of the spaceborne elastic components.The application of the electromagnetic coupling field was observed to improve the stiffness,hardness,creep resistance,and other mechanical properties of the spaceborne elastic element without any additional weight or structure punishment.The result reveals that stiffness is enhanced by 2.11%and the distribution variance is decreased by an order of magnitude.Microhardness of the spring is increased by 8.42%,while the variance distribution is decreased by 40.79%.A 45.76%creep resistance improvement is achieved by the application.The improvement of creep resistance is beneficial to the long-term service of the spring.The coupling field improves the uniformity of spring stiffness and hardness distribution and alleviates the individual differences among different springs,which has a positive effect on hundreds of elastic elements in service on spaceborne antenna.In addition,examination by metallurgical microscope shows evidence of enhancement of the mechanical properties by the electromagnetic coupling field.Broken grain boundaries and more evenly distributed carbides were observed.Positive effects on mechanical properties are attributed to the fine grain strengthening and precipitation strengthening.According to the analysis,the rein

关 键 词：星载弹性元件 电磁耦合 细晶强化 沉淀强化 位错 

分 类 号：V45[一般工业技术—材料科学与工程]