ROLL FOR ROLLING SURFACE TOPOGRAPHY OF STEEL PLATE AND METHOD FOR MANUFACTURING SAME

A roll for rolling surface topography of a steel plate is disclosed. A plurality of raised textured points are arranged on a roll surface. The shape formed by a joint between each single textured point and the roll surface is circular or approximately circular. The circular shape has a diameter of 50∼150µm. Each single textured point has a raised height of 2∼12µm, and the overlap among adjacent textured points is lower than 10%. The quantity variance of the textured points per square millimeter of the roll surface is lower than 20%, and the coverage area ratio of the textured points in each square millimeter is 30∼90%. The method comprises performing surface treatment on a feed roll to control the surface roughness Ra of the roll to be smaller than 0.5µm; and performing layer-by-layer ablation on a surface material of the roll to form the textured points.