高斯脉冲激光烧蚀钛合金热效应分析研究  

Analytical study of the thermal effect of Gaussian pulsed laser ablation on titanium alloys

作　　者：姜永霞 李隆[1,2] 程雨露 余天锡 文君瑶 张春玲 JIANG Yongxia;LI Long;CHENG Yulu;YU Tianxi;WEN Junyao;ZHANG Chunling(Faculty of Science,Xi'an University of Architecture&Technology,Xi'an710055,China;Institute of Applied Physics,Xi'an University&Architecture Technology,Xi'an710055,China)

机构地区：[1]西安建筑科技大学理学院,陕西西安710055 [2]西安建筑科技大学应用物理研究所,陕西西安710055

出　　处：《光学技术》2025年第2期189-195,共7页Optical Technique

基　　金：国家自然科学基金项目(11705136);国家级大学生创新项目(202310703056)。

摘　　要：利用多物理场耦合分析软件对激光作用于金属材料TC4材料时的热效应进行数值模拟计算,从热传导理论出发,构建了高斯分布脉冲激光单点作用TC4材料的二维轴对称瞬态物理模型,建立了钛合金表面激光加工温度场分布理论模型。通过论述激光烧蚀金属表面主要发生的激光加工机理和物理现象,建立了激光烧蚀金属材料表面的理论模型以及求解材料温度场分布的热传导方程,并通过有限元仿真进行研究,得到了光斑半径、激光功率、激光脉宽对于钛合金表面热效应的影响结果,结果表明在光斑半径为0.3mm,激光功率为1500W,脉宽为5000ns时取得的加工效果更佳。此研究为下一步有限元模拟和实验研究钛合金表面激光加工提供了理论依据。Numerical simulation calculation of the thermal effect of laser acting on metal material TC4 material is carried out by using multi-physics field coupling analysis software, and a two-dimensional axisymmetric transient physical model of Gaussian distributed pulsed laser acting on TC4 material at a single point is constructed from the theory of heat conduction and a theoretical model of the distribution of the temperature field of laser processing on the surface of titanium alloy is established. By discussing the laser processing mechanism and physical phenomena mainly occurring in laser ablation of metal surfaces, the theoretical model of laser ablation of metal material surfaces as well as the heat conduction equations for solving the temperature field distribution of the material are established, and studied by finite element simulation, and the results of the influences of the spot radius, laser power, and laser pulse width on the thermal effect of the surface of the titanium alloy are obtained, and the resultant surface is in the range of the spot radius of 0.3mm, the laser The results show that the surface is better processed when the spot radius is 0.3mm, the laser power is 1500W and the pulse width is 5000ns. This study provides a theoretical basis for the next finite element simulation and experimental research on the surface laser processing of titanium alloy.

关 键 词：TC4 激光加工 热效应仿真 有限元分析 高斯激光 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TN249[金属学及工艺—金属材料]