Bainite Transition and Isothermally Quenched Ductile Iron

Features and classification of bainite transition was described in detail. It was pointed out that with different chemical composition and different iso-quenching temperature,the structure morphologies of the bainite transition products are different from each other,the ferrite is the indispensable constituent,and whether there is or not carbide existing is not the necessary criterion to discern the bainite. The phase transition process of isothermally quenched ductile iron was investigated,the author's opinion on the nomination of the structure of isothermally quenched ductile iron was described.