激光与光电子学进展, 2020, 57 (13): 131403, 网络出版: 2020-07-09   

能量密度对激光清洗铝合金漆层的影响及作用机理 下载: 1198次

Effect and Mechanism of Energy Density on the Aluminum Alloy Paint Cleaned by Laser
作者单位
1 陆军装甲兵学院机械产品再制造国家工程研究中心, 北京 100072
2 陆军装甲兵学院再制造技术重点实验室, 北京 100072
摘要
采用光纤激光器对聚丙烯酸酯基漆层进行除漆实验,通过扫描电子显微镜(SEM)图像分析了能量密度对激光除漆质量的影响,研究了能量密度与表面形貌的关系;采用SEM、X射线能谱仪(EDS)、X射线光电子能谱仪(XPS)进行激光除漆机理研究。结果表明:能量密度对除漆质量有着重要影响,激光清洗1次时,随着能量密度的增加,激光除漆质量呈现出变好的趋势,当能量密度为12.56 J/cm 2和13.60 J/cm 2时,由于等离子体屏蔽效应,除漆质量稍有降低;激光清洗2次时,随着能量密度增加,激光除漆质量不断提高,由于激光等离子体冲击作用增强,清洗表面燃烧效应减弱,清洗表面C元素含量增加,O元素含量降低;清洗表面形貌、元素含量及价态显示,清洗过程中存在热燃烧、高温分解和等离子体冲击3种清洗作用机制,铝合金表面聚丙烯酸酯基漆层的清除是多种作用机制耦合的结果。
Abstract
In this study, the removal mechanism of polyacrylate-based paint is studied by fiber lasers. In addition, the effects of energy density on the quality of laser paint removal are investigated by scanning electron microscopy (SEM), and the relationship between the energy density and surface shape is studied. The mechanism of laser paint removal is studied using SEM, X-ray energy dispersive spectrometer (EDS), and X-ray photoelectron spectrometer (XPS). The results show that the quality of laser paint removal is considerably influenced by the energy density. When laser cleaning was performed once, the quality of laser paint removal improves with the increasing energy density. However, this quality slightly decreases because of the plasma shielding effect when the energy density is 12.56 J/cm 2 and 13.60 J/cm 2, respectively. When laser cleaning is performed twice, the quality of laser paint removal continuously improves with the increasing energy density. The combustion on the cleaning surface is weak owing to the enhanced laser-plasma-induced shock. The content of C on the cleaning surface increases, whereas that of O decreases. The morphology, element content, and chemical bonding of the cleaning surface indicates three types of cleaning mechanisms, including thermal combustion, pyrolysis, and plasma shock. Various coupling mechanisms are used to remove the polyacrylate-based paint from the surface of an aluminum alloy.

赵海朝, 乔玉林, 杜娴, 王思捷, 张庆, 臧艳. 能量密度对激光清洗铝合金漆层的影响及作用机理[J]. 激光与光电子学进展, 2020, 57(13): 131403. Haichao Zhao, Yulin Qiao, Xian Du, Sijie Wang, Qing Zhang, Yan Zang. Effect and Mechanism of Energy Density on the Aluminum Alloy Paint Cleaned by Laser[J]. Laser & Optoelectronics Progress, 2020, 57(13): 131403.

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