激光清洗Q345钢表面氧化层的数值模拟

Numerical simulation of laser-cleaned oxide layer on Q345 steel surface

为了探索激光搭接率和激光平均功率等物理参数在激光清洗时对Q345钢表面氧化层温度场分布和烧蚀深度的影响。本文针对钢铁产业工程中常用材料Q345钢表面的氧化层开展激光清洗过程模拟研究。首先对Q345钢表面氧化层进行物理化学性质分析,从而建立氧化物和基体的激光清洗分层模型。接下来借助COMSOL Multiphysics软件,将Q345钢激光清洗模型进行网格划分和瞬态研究,并用实验来验证,从而得出激光参数对清洗温度场和清洗深度的影响。结果表明光斑搭接率对温度场影响不大,但随着搭接率的提高,烧蚀深度越深。而激光平均功率越大,温度场峰值越高,烧蚀深度也显著加深。该研究结果可为激光清洗氧化层的工艺研究提供理论参考。

In order to explore the effects of physical parameters such as laser overlapping rate and average laser power on the temperature distribution and ablation depth of Q345 steel surface oxide layer during laser cleaning,this paper carries out a simulation study of the laser cleaning process for the oxide layer on the surface of Q345 steel,which is commonly used in steel industry engineering.Firstly,the physicochemical properties of the oxide layer on the surface of Q345 steel are analyzed,and the laser cleaning layered model of the oxide and matrix is established.Next,with the aid of COMSOL Multiphysics software,the Q345 steel laser cleaning model is meshed and transient study is conducted,and experimental verification of the effects of laser parameters on the cleaning temperature field and depth of cleaning are obtained.The results show that the spot overlapping rate has little effect on the temperature field,but with the increase of the overlapping rate,the ablation depth is deeper.And the greater the average laser power,the higher the peak temperature field and the deeper the ablation depth significantly.The research results can provide a theoretical reference for the process study of laser cleaning of oxide layers.