Morphological study of Widmanstatten ferrite in Hypo Eutectoid Steel

The morphologg of ferrite of deep drawing scel 20A after different treatment has been studied by optical microscope and electron microscope. It was found that the morphology of ferrite is related to the cooling mode and the cooling rate.The morphology is in reasonable agreement with Dubes Classification. The mechanism of the nucleation and growth of ferrite was discussed.