Different methods for attaining a particular roughness on cold-rolled strip

The surface texture of rolls textured by the SBT, EDT and Lasertex methods were scanned and assessed prior and subsequent to their use in a skin-pass mill. Specimens were removed from a selection of the coils skin-passed by the examined rolls before and after the skin-pass rolling, and their surface texture was surveyed. The roll wear, the behaviour during the transfer of the roll textures to the sheet, and the consistency of the sheet textures were analysed and evaluated on the basis of the scanned textures. The considerable scatter resulting from the standard deviations broadened the parameters for characterizing the Lasertex-generated textures. The material ratio curves of the three-dimensionally scanned textures are used successfully to assess the changes in the roll textures, the behaviour during the transfer from roll to strip, and the consistency of the sheet surfaces over the rolled length of the strip, and are recommended for future evaluations.