Influence of scale on hot rolling characteristics of Si-bearing steel sheets

Abstract

In hot rolling processes, surface oxide layer, scale, may influence friction and affect rolling characteristics. Si-bearing steel was rolled between 1273 K and 1473 K after oxidation for 0 s to 40 s at a reduction of 30%. In Si-bearing steel, Fe2SiO4 is formed in the scale and causes eutectic transformation between FeO at 1450 K. The rolling force is affected by the eutectic transformation of the scale. If the rolling temperature is just below the eutectic temperature, roll force scatters and curling of the sheet occurs. This is due to inhomogeneous formation of the liquid phase because of the transformation. © Published under licence by IOP Publishing Ltd.