摘要
相对于化学溶剂、手工打磨与喷丸等民机蒙皮除漆方法,激光除漆具有非接触式、高效、清洁等一系列优势。而飞机蒙皮激光除漆过程中,铝合金蒙皮基体由于吸收部分激光能量可能会遭受热影响损伤。论文采用激光能量密度分别为6.12 J/cm^2、12.22 J/cm^2、18.34 J/cm^2的光纤激光对2024 T-3铝合金表面漆层进行清除,采用红外热像仪(非接触式)结合粘贴热电偶(接触式)方式,对铝合金蒙皮表面激光除漆时基体材料温度进行适时记录,并对除漆后基体表面微观结构及除漆后氧化层进行测试分析。结果表明,激光工艺可实现铝合金蒙皮表面漆层的彻底清除,相应的基体最高温度分布分别为49.11℃、48.88℃、68.54℃。表面氧化层厚度略有下降,但表面微观结构无明显变化,说明采用合适的激光除漆工艺参数,在去除漆层的同时未造成铝合金基体热损伤,激光除漆工艺可行。
Compared with chemical solvent,manual polishing and shot peening,laser paint stripping has a series of advantages such as non-contact,high efficiency and cleaning.In the process of aircraft skin laser paint stripping,aluminum alloy skin matrix may suffer thermal damage due to absorption of partial laser energy.The paper used the fiber laser with laser energy density of 6.12 J/cm^2,12.22 J/cm^2 and 18.34 J/cm^2 to remove the 2024 T-3 aluminum alloy surface paint layer.Using infrared thermal imager(non-contact)combined with paste thermocouple(contact).The temperature of the base material during the laser stripping of the aluminum alloy skin surface was recorded in a timely manner,and the surface microstructure of the substrate after the paint removal and the oxide layer after the paint removal were tested.The results show that the coating can be completely removed by laser technology,and the maximum temperature distribution of the substrate is 49.11℃,48.88℃and 68.54℃respectively.The thickness of the oxide layer on the surface decreased slightly,but the microstructure of the surface did not change significantly,indicating that the appropriate laser paint stripping process parameters could be used to remove the coating without causing thermal damage to the aluminum alloy substrate,and the laser paint stripping technology was feasible.
作者
杨文锋
李佐
刘畅
张殊伦
YANG Wen-feng;LI Zuo;LIU Chang;ZHANG Shu-lun(Aviation Engineering Institute,Civil Aviation Flight University of China,Guanghan 618307,China)
出处
《激光与红外》
CAS
CSCD
北大核心
2020年第7期795-802,共8页
Laser & Infrared
基金
四川省科技计划项目(No.2018GZ0497)资助。
关键词
飞机蒙皮
激光除漆
红外热成像
热影响
微观结构
aircraft skin
laser paint stripping
infrared thermal imaging
heat affect
microstructure
