ТЕРМОДИНАМИЧЕСКИЙ АНАЛИЗ ПОВЕДЕНИЯ КИСЛОРОДАПРИ ВНЕПЕЧНОЙ ОБРАБОТКЕ ВЫСОКОЛЕГИРОВАННОЙ СТАЛИ 08Х18Н10Т

The actual activities of oxygen in liquid metal during ladle treatment high alloyed steel have been determined with using oxygen sensors. Activities of components of liquid steel and slag with using pseudosubregular solution for liquid metal and psevdoregular ion solution for liquid slag have been calculated. An equation has been obtained and used to calculate the oxygen activity in equilibrium with components of liquid steel Fe–Cr–Ni–Mn–Si–C–Al–Ti, slag FeO–MnO–CaO–MgO–SiO2–CrO1.5–AlO1.5–TiO2 and gas phases. The study showed that the system “metal–slag–gas phase” at the end of the process of deoxidation of the metal is much closer to equilibrium than at the end of the oxidation process.