The controversy and perspective about bainite phase in the steel

The controversy about the phase theory of the bainite in the steel between two schools is reviewed,some viewpoints are analyzed and corrected according to philosophic theory of natural dialectics.It points out there are essential differences between decomposing of the pearlite and phase of the bainite.Bainite microstructures are not mixture but a conformity system.The series of transformations of supercooling austenite→pearlite,bainite,martensite should be studied as a conformity system.It is a postulate of unifying cognitions that bainite phase is a transition between diffusing and shearing phase.Bainite phase has diffusionshear conformity mechanism.