Discussion on Formation Mechanism of Surface Roughness of Cold Rolled Steel Sheets.

Abstract

In order to clarify the formation mechanism of surface roughness of steel sheets in cold rolling, the cold rolling experiments are made using carbon steel (SPCC) and stainless steel (SUS430) sheets with various surface roughness at the entry of rolling, and in neat lubrication of two mineral oils with different viscosities. Also, the shifting coefficient of weighted average roughness, which is called m-value, in a surface roughness equation is calculated by applying the rolling experiment data to the surface roughness equation proposed in this paper. Then, the formation mechanism of surface roughness of cold rolled steel sheets is discussed. As a result, it has been found that the m-value is larger than 1 and increases with increase of the initial equivalent surface roughness.