万壮,杨学锋,夏国峰,李丹,刘文波,成健,王守仁.激光频率对激光干式清洗机理及表面性能的影响[J].表面技术,2021,50(5):70-77.
WAN Zhuang,YANG Xue-feng,XIA Guo-feng,LI Dan,LIU Wen-bo,CHENG Jian,WANG Shou-ren.Effect of Laser Frequency on the Mechanism and Performance of Laser Dry Cleaning[J].Surface Technology,2021,50(5):70-77 |
| 激光频率对激光干式清洗机理及表面性能的影响 |
| Effect of Laser Frequency on the Mechanism and Performance of Laser Dry Cleaning |
| 投稿时间：2020-06-06 修订日期：2020-08-13 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.05.006 |
| 中文关键词: 清洗频率 清洗机理 表面性能 激光清洗 清洗效果 |
| 英文关键词:cleaning frequency cleaning mechanism surface performance laser cleaning cleaning effect |
| 基金项目:国家自然科学基金(51872122);中国博士后科学基金(2017M620286);山东省重点研发计划(2018CXGC0809);山东省农机装备研发创新计划(2018YF012) |
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| Author | Institution |
| WAN Zhuang | School of Mechanical Engineering, University of Jinan, Jinan 250022, China |
| YANG Xue-feng | School of Mechanical Engineering, University of Jinan, Jinan 250022, China |
| XIA Guo-feng | School of Mechanical Engineering, University of Jinan, Jinan 250022, China |
| LI Dan | School of Mechanical Engineering, University of Jinan, Jinan 250022, China |
| LIU Wen-bo | School of Mechanical Engineering, University of Jinan, Jinan 250022, China |
| CHENG Jian | School of Mechanical Engineering, Hubei University of Technology, Wuhan 430000, China |
| WANG Shou-ren | School of Mechanical Engineering, University of Jinan, Jinan 250022, China |
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| 中文摘要: |
| 目的 探究不同频率下激光干式清洗的清洗效果、清洗机理及清洗后材料的表面性能。方法 通过理论计算，得出较优频率，并采用固体光纤激光器，控制清洗频率单因素参数，以Q235低碳结构钢表面氧化层为例进行清洗实验。结果 在350 kHz清洗后，样品的表面效果最佳;频率为250 kHz时，样品的表面粗糙度达到最低值，为2.572 μm，基体轻微损伤;频率为150 kHz时，样品摩擦系数达到最大值，为0.3905，基体损伤最大。Q235表面氧化层激光干式清洗机理为烧蚀及溅射，随频率的增加，烧蚀作用逐渐下降，溅射作用逐渐增强。当频率为550 kHz时，烧蚀作用最低，占比为68%;频率为150 kHz时，基体损伤，样品表面发生二次氧化，受损严重，表面粗糙度值最大。在250~550 kHz，随频率的增大，样品的表面粗糙度呈上升趋势。激光干式清洗后，样品表面的摩擦系数总体呈下降趋势，且在频率为150 kHz时，激光能量密度最大，激光强化作用最明显。随频率的增加，样品清洗表面残余应力下降。在激光频率为350 kHz清洗后，样品表面的电化学腐蚀性能最好。结论 在激光干式清洗时，频率作为一个重要参数，对清洗效果、清洗机理及表面性能有显著影响。 |
| 英文摘要: |
| The cleaning effect, cleaning mechanism and surface performance under different frequencies were investigated. The optimal frequency can be obtained by theoretical calculation. Solid fiber laser was used in the experiment. The cleaning frequency single factor parameter was controlled. The surface oxide layer of Q235 low carbon structural steel was taken as an example for the cleaning experiment. The results showed that the surface of the sample was the best after being cleaned at 350 kHz frequency. When the frequency was 250 kHz, the surface roughness of the sample reached a minimum value of 2.572 μm, and the matrix was slightly damaged. When the frequency was 150 kHz, the friction coefficient of the sample reached a maximum value of 0.3905 and the matrix damage was also the maximum. The surface oxide layer cleaning mechanism of Q235 was ablative and sputtering. With the increase of frequency, the ablative effect decreased gradually but the sputtering effect increased gradually. When the frequency was 550 kHz, the lowest proportion of ablation was 68%. When the frequency was 150 kHz, the sample surface was secondary oxidized. The matrix surface was seriously damaged, and the surface roughness was the largest. In the range of 250~550 kHz, the surface roughness of the sample increased with the increase of frequency. With the increase of frequency, the overall tendency of the surface friction coefficient decreased after the laser dry cleaning. When the frequency was 150 kHz, the laser energy density was the highest and the laser enhancement was the most obvious. The residual stress of the sample cleaning surface decreased with increasing frequency. With the laser of a frequency of 350 kHz, the electrochemical corrosion performance of the surface was the best. If it is higher or lower than this frequency, the electrochemical corrosion performance of the surface will decrease after the cleaning. In laser dry cleaning, frequency as an important parameter has a significant influence on the cleaning effect, cleaning mechanism and surface performance. |
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