KM8不锈钢板式热沉激光焊接工艺研究  

Laser welding of the KM8 stainless steel plate-style thermal shroud

作　　者：许贞龙[1] 李玉忠[1] 崔立军[1] 陈金明[1] 

机构地区：[1]北京卫星环境工程研究所,北京100094

出　　处：《航天器环境工程》2015年第5期549-553,共5页Spacecraft Environment Engineering

基　　金：中国空间技术研究院自主研发项目

摘　　要：热沉是空间环境模拟器的重要组成部分之一,用于在真空热试验中产生冷黑环境。我国目前正在研制的KM8空间环境模拟器和KM7A空间环境模拟器的热沉均采用不锈钢板式结构,而不锈钢板式热沉的焊接加工工艺是亟需解决的技术问题。文章介绍了在KM8不锈钢板式热沉激光焊接工艺研究中,采用不同的工艺参数焊接了不同厚度的搭接组合板试件后,对这些试件进行了力学拉伸试验和焊缝分析与检测,并根据检测结果确定了不同厚度板材组合的最佳搭接焊接工艺参数。这些工艺参数在后续的生产实践得到了有效验证。The thermal shroud is an important subsystem of the space environment simulator, mainly used to provide acold and dark environmental for the spacecraft thermal balance and thermal vacuum tests. The thermal shroud of the KM8space environment simulator used for the space station thermal test and the KM7A space environment simulator used forthe satellite test are all in stainless steel plate-style structures. For the manufacture of the two large stainless steel thermalshrouds, the urgent need is to solve the bottleneck problem related with the processing of the stainless steel plate-stylethermal shrouds. This paper analyzes the laser welding process for the KM8 thermal shroud. Welding specimens ofdifferent combinations of plate thickness with different welding parameters are made, and mechanical tensile tests, weldanalysis and detections are carried out. The optimum welding parameters of the combination of different thickness platesare then determined. The manufacture practice shows that the welding parameters obtained in this study are adequate.

关 键 词：空间环境模拟器 热沉 激光焊接 焊接工艺 不锈钢板 

分 类 号：V416.8[航空宇航科学与技术—航空宇航推进理论与工程] V464