Microstructure Evolution of Hyper-eutectoid Pearlite Steel During Cold Rolling
Microstructure evolution of hyper-eutectoid pearlite steel during cold rolling was investigated by SEM,TEM and XRD.The results show that the deformed pearlite microstructure is nonuniform,it is mainly made up of irregularly bent lamellae(IBL),coarse lamellae with shear-band(CLS) and fine lamellae(FL).With the increase of deformation,the proportion of the fine lamellae increases.The parts of cementite lamellae dissolve while the severe plastic deformation occurs,and the lattice constant of the ferrite also increases.