Abstract: The effects of ce on the solidification and the dendritic segregation of 35CrNi3MoV and 20CrMoV steels have.been studied by means of thermal ana, lysis, metallographic examination and electron microprobe.
The results indicate that addition of cerium into steel decreases the undercooling of liguid-solid transformation of the steel,delays the peritectic reaction, refines primary grains of steel, refines secondary dendrite arm spacings of equ-iaxed crystals and decreases the dendritic segregation of Cr, Mo, V, Mn,Si,Ni etc, in different degrees.