Evolution of surface morphologies during cold rolling under different lubricating conditions
A cold rolling experiment of pickled strip was performed by a 4-high mill under different lubricated conditions.The surface morphologies of samples were observed by SEM and the surface roughness curves were measured by a TR200 profile meter before and after rolling deformation.Evolution of the morphologies were emphatically analyzed and discussed.These results show that surface morphologies of the samples mainly depend on the size of micro-pits and roll marks.The actual contact area increases between the sample and roll, the size of micro-pits and roll marks decreases, and the surface finish of the samples increases with the increase of rolling passes.After five passes of cold rolling, least micro-pits and obvious roll marks remain on the sample surface under dry friction condition, least roll marks and a small number of micro-pits remain on the sample surface under oil lubrication condition, the residual micro-pits and roll marks were rarely on the sample surface under emulsion lubrication condition.
cold rollingsurface roughnesssurface morphologymicro-pitroll mark
NETL
NSTL
万方数据
维普
