THE VALENCE ELECTRON STRUCTURE OF AUSTENITE IN LOW ALLOY ULTRAHIGH-STRENGTH STEELS AND ITS INFLUENCES ON KINETICS OF PHASE TRANSFORMATION

Based on S. H. Yu’s empirical electron theory of solids and molecules, the valence electron structure of austenite in low alloy ultrahigh-strength steels, 30CrMnSiNi2A and 40 CrMnSiMoVA is established. The behavior of various main-added elements in the kinetics of phase transformation is discussed on the basis of C-Me segregation caused by the valence electron structure, The influence of alloying elements on the structure and morphology of transformed products is discussed from the viewpoint of interaction between the driving force of phase transformation and segregating force. Then on the basis of the valence electron structure of the alloy, the composition design of ultrahlgh-strength steels is discussed.