Regular micro-dimples are processed on 45 steel surfaces by a LM-YLP-20F-Ⅱ laser marking machine.Ring-on-block line contact wear and friction tests are conducted under dry sliding in order to study tribological properties of laser surface textures on 45 steel surfaces.The hardness of the inside and outside of dimples are examined,worn surfaces of specimens are observed by SEM,and influence mechanisms of laser surface textures on 45 steel surfaces with different original surface hardness are investigated.The...