纳秒脉冲激光对表面织构参数影响研究

表面微织构具有良好的减摩作用,刀具表面微织构的应用受到国内外学者的广泛关注。针对激光技术在表面微织构制备中的应用,利用红外脉冲纳秒激光雕刻机在YT15刀片表面制备出单脉冲织构、连续线性凹槽织构,分析单脉冲功率及相邻两脉冲光斑重叠面积百分比对织构参数的影响。结果表明:随着激光功率的增加,单脉冲织构的直径、深度、重铸层高度、重铸层宽度均增加;随着相邻两脉冲光斑重叠面积百分比增加,连续线性凹槽织构的深度、宽度、重铸层高度均增加,而重铸层宽度减小;与同功率单脉冲织构相比,连续脉冲的织构深度、重铸层高度、重铸层宽度均大于单脉冲织构,连续脉冲的织构宽度小于单脉冲织构直径。该研究为特定尺寸表面微织构制备提供参考。

Effect of Nanosecond Pulse Laser on the Surface Texture Parameters

The surface micro texture has a good antifriction effect,and the application of tool surface micro texture has been widely concerned by scholars at home and abroad.In view of the application of laser technology in the preparation of surface micro texture,single pulse texture and continuous linear groove texture were prepared on the surface of YT15 blade by using infrared pulse nanosecond laser engraving machine.The effects of single pulse power and the percentage of overlapping area of two adjacent pulses facula on texture parameters were analyzed.The results show that the diameter,depth,height and width of the recast layer of the the single pulse texture increase with the increase of laser power;the depth,width and height of the recast layer of the the continuous linear groove texture increase with the increase of the percentage of overlapping area of two adjacent pulses facula,while the width of the recast layer decreases. Compared with the single pulse texture with the same power,the depth,height and width of the recast layer of the continuous linear groove texture are larger than that of the single pulse texture,and the width is smaller than that of the single pulse texture diameter.This study provides a reference for the preparation of surface micro texture with specific size.