The surface morphology of the ablation region of femtosecond laser finishing surface gear material 18Cr2Ni4WA is directly related to the laser process parameters.In order to obtain a better surface topography of the ablation region,a three-factor,three-level orthogonal test is designed,and the effects of laser repetition frequency,en-ergy density and scanning speed on the depth of the ablation region and surface roughness are analyzed by signal-to-noise ratio,and the optimal combination of process parameters is obtained with a single response target.Combining the grey correlation method to optimize the two response targets,the optimal process parameter combinations are obtained as 200 kHz repetition frequency,3.5 J/cm2 energy density,and 110 mm/s scanning speed,and the optimal process parameter validation test shows that the optimized surface topography has a better overall quality,which proves the re-liability of the grey correlation method of multi-response optimization,and provides a method to improve the quality of surface topography for the femtosecond laser micromachined face gears.This proves the reliability of the grey correla-tion method and provides an effective method to improve the surface topography of femtosecond laser micromachined gears.
femtosecond laserface gear materialablative morphologygrey relational methodoptimization of process parameters
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