Koichi Furusawa and Akio Kojima
We studied, under various conditions, about the morphology of ferrite during the formation of banded structure. The results obtained were as follows. (1) During continuous cooling (2°/min) from quenching temperature, ferrite nuclei begin to arrange along the rolled direction at the degree just under Ar3. (2) Isothermal transformation was done and ferrite nucleation and growth are shown by the microphotographs. (3) Ferrite nucleation was not influenced by the existence of MnS but its growth seemed to be. (4) By studies of Ni-Cr steels, we presumed that the cause of banded structure was the banded segregation of non-diffusible elements e.g, Ni, Cr and Mn.
Please do not copy without permission.