Studies on the microstructure of the textured point on laser textured huge rolls

This paper studied the microstructure of laser texture rolls by SEM.Aftel laser caved,the four regions named melt region,phase change region,thermal effective region and substrate region,are formed near the surface.Du to the very large supper cooling rate brought by rapid solidification,the melt region consists of very fine microlitic dendritical or cytostate organization,which is well-distributed and fine and compact.So the hardness and anti-etching performance of the melt region are greatly improved.Furthermore,the scanning speed has an important influence on the size of phase change region and thermally affected region.