Evolution of surface morphologies of piece in process of cold rolling
A cold rolling experiment of pickling strip steel was performed by a 4-high mill.The surface morphologies of samples were observed by SEM and the surface roughness curves were measured by TR200 profile meter before and after rolling deformation.Variations of pits and roll marks on the sample surface 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 the roll marks decreases on the sample surface,and the surface finish of the samples increases as the decrease of roll surface roughness and the increase of rolling passes.The surface finish of the samples is higher under oil lubricated rolling than under dry friction rolling at the same roll surface condition.The roll surface roughness of the first pass also plays an important role on the surface morphologies of the final samples.
cold rollingsurface roughnesssurface morphologyroll mark
NETL
NSTL
万方数据
维普
