Phase transitions and phase diagrams for liquid iron-based melts

Investigations of the magnetic susceptibility for Fe-B (up to 15 at.%) and Fe-C (up to 2.0 wt.%) alloys were carried out in a wide temperature range. Some anomalies on χ(T) curves were fixed and the kinetics of the crystallization versus melt structure was analyzed. The results are discussed in the suggestion that near liquidas we have two-structural melts: there exist microdomains enriched by the impurity element and the microareas of dilute solution of C(B) in Fe. For the latter, structural transformations similar to phase transitions in solids and connected with short-range order change could be realized. In the framework of local state representations of statistical mechanics, the necessary calculations were done and the lines of structural transformation in liquid phase were plotted.