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采用激光微加工技术在45#钢表面制备了微坑型织构,将激光表面织构化与MoS2固体润滑剂相结合在45#钢表面制备了复合润滑结构.研究了其在干摩擦条件下的摩擦磨损性能,考察了织构面密度及织构化微坑大小对其摩擦性能的影响.通过扫描电镜与能量色散谱仪对磨斑表面进行了分析.结果表明:与未织构面相比,织构面具有低而稳定的摩擦系数和高的耐磨寿命;对同一孔径织构面,随着织构密度的增加其表面摩擦系数随之减小,较适宜的织构密度为20%～35%;对同一织构面密度,当织构面密度小于20%时,较小孔径织构面的摩擦系数更低;织构面密度增至35%后,织构面摩擦系数则随孔径增大而减小;由于织构面复合润滑结构中的微坑有效地储存了润滑剂从而在摩擦过程中维持表面润滑薄膜的形成.
Micro-crater texture was fabricated on the surface of 45 # steel by laser micromachining, and the composite lubrication structure was prepared by combining laser surface texturing with MoS2 solid lubricant on the surface of 45 # steel. , The effect of the textured surface density and the size of the textured micro-pits on the tribological properties was investigated.The surface of the plaque was analyzed by scanning electron microscopy and energy dispersive spectrometer.The results showed that compared with the un-textured surface , The textured surface has a low and stable coefficient of friction and high wear life; with the same aperture texture surface, as the texture density increases its surface friction coefficient decreases, the more appropriate texture density of 20% ~ 35%. For the same textured surface density, the coefficient of friction of the smaller-size textured surface is lower when the textured surface density is less than 20%. The friction coefficient of the textured surface increases with the increase of the textured surface density to 35% The pore diameter increases and decreases; as the micro-pits in the textured surface composite lubricating structure effectively store the lubricant, thereby maintaining the formation of the surface lubricating film during the friction.