Ma Xinqiang, Liu Tengchao, Ren Yuan, Zhang Yanlu, Xu Zifa, Cheng Wei, Zhang Zhenzhen, Zhu Yongmei, Zhang Qinhe
Key Laboratory High Efficiency & Clean Mech Manufacture, School of Mechanical Engineering, Shandong University, Ministry of Education, 17923 Jingshi Rd., Jinan 250061, China.
Laser Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250104, China.
Materials (Basel). 2024 Dec 27;18(1):61. doi: 10.3390/ma18010061.
This study employed different spot pattern lasers to clean the oxide film on the surface of a TC4 titanium alloy. The variation in temperature field and ablation depth during the laser cleaning process was simulated by establishing a finite element model. The effects of various laser processing parameters on the micromorphology, elemental composition, and surface roughness of the TC4 titanium alloy were analyzed. The results show that as the laser energy density increases, both the temperature field and ablation depth increase as well. Under optimal laser processing parameters, the laser energy density is 5.27 J/cm, with a repetition frequency of 300 kHz and a scanning speed of 6000 mm/s. A comparison of the cleaning effects of Gaussian pulse lasers and Flat-top pulse lasers reveals that the Gaussian pulse laser causes less damage to the TC4 titanium alloy, resulting in lower oxygen content and roughness values after cleaning compared to Flat-top pulse laser cleaning.
本研究采用不同光斑模式的激光对TC4钛合金表面的氧化膜进行清洗。通过建立有限元模型模拟了激光清洗过程中的温度场变化和烧蚀深度。分析了各种激光加工参数对TC4钛合金微观形貌、元素组成和表面粗糙度的影响。结果表明，随着激光能量密度的增加，温度场和烧蚀深度也随之增加。在最佳激光加工参数下，激光能量密度为5.27 J/cm，重复频率为300 kHz，扫描速度为6000 mm/s。高斯脉冲激光和平顶脉冲激光清洗效果的比较表明，高斯脉冲激光对TC4钛合金的损伤较小，清洗后氧含量和粗糙度值均低于平顶脉冲激光清洗。
