Structural Evolution of Thin-Plate Pearlite in Wire-Blank Production

The structural transformation of thin-plate pearlite in the cold plastic deformation (drawing) of C86D steel coils with total reduction up to 83.2% is considered. In terms of the physical mesomechanics of structurally heterogeneous media, it is shown that the ferrite–cementite phase boundaries play a significant role in the localization of the deformation and the formation of fragmented mesostructure at different degrees of cold plastic deformation. The transformation of cementite in cold dynamic spheroidization is shown to be associated with the fragmentation of plates and the formation of local submicrocrystalline sections in the pearlite.