268-paper-不同毛化冷轧带钢形貌评价(英文).docVIP

Surface Topography Evaluation of Various Texturing Cold-rolled Strips Sun Da-le, Yao Li-song, Fan Qun, Zhang Jian ( Baosteel RD Center, Shanghai 201900, China ) ABSTRACT: Comparison experiments of characteristics of SBT, EDT, and TOPOCROM textured cold rolls has been carried out through on-line trail in hot galvanizing temper mill., in which various texturing cold rolling strips have been analyzed and evaluated. The results indicate that the morphology of the TOPOCROM texturing strip is superior to that of the traditional texturing technologies, therefore, a promising application for TOPOCROM texturing technology. KEY WORDS: Temper mill, Work rolls, Cold-rolled strip, Surface texturing topography Introduction With the rapid development of household appliance and automobile industry, the demands for high quality cold strips are increasing year on year. The customers’ requirements for the surface quality and the usabilities of strips, are getting higher and higher correspondingly, which stimulates the rapid development of roll texturing techniques. Formability and paintability are the important indexes of scaling usability for coated and uncoated cold rolling strips, all of which are closely related to the characteristics of the strip surface topography. The basic parameters of the strip surface topography are the roughness value (Ra) and peak counts (PC), where different Ra and PC distribution pattern refer to the difference of the average wave crest-trough height and wave crest amounts. Higher Ra value is beneficial to the formation of isolated lubricating dents, thus improves the tribological formability of strips. The equal Ra , higher PC, and stochastic distributed surface topography can reduce the number of optical interference stripes, therefore, avoids orange-skin phenomenon, which improves the optical paint property of the strips. As Ra/PC are the key factors to control the usability of the strips, different class of cold rolling strips should have differ