Yeputatov Y. The Influences of the chemical composition and particularities of their preparation on sharing the hydrogen in melts of the system flux-metal

Thesis is dedicated to study of the particularities of the influence of the hydride formative element additives on hydrogen sharing in multicomponent fluoride - oxidation system which are used both in metallurgy and at welding. Methodical provision of physicochemical particularities of the hydrogen behavior is developed in system gas-slag-metal with reference to process of electroslag remelting of alloyed steel. A new determination way of the hydrogen in fluoride - oxidation flux during electroslag remelting (and other metallurgical slag) using nitride as restorer under converting by HF, H2O, H2S and HСl in H2 with use of nitrogen as gas-carrier and katharometer for detection and registrations of hydrogen amount standing out from tests of the flux are developed and analyzed. The kinetics of hydrogen thermal desorption from fluoride - oxidation flux during electroslag remelting is studied, kinetic features limiting stage of the process are determined, on their base equations for practical calculation ofdegassing flux duration for different sizes granules are offered. The existence forms of the hydrogen in fluoride - oxidation melts and balanced compositions gas phase for miscellaneous fluxes in the field of electroslag technologies' work temperature are explored. Certain balanced of importance factor sharing the hydrogen between slag and metal are given. Certain factors of molecular diffusion of the hydrogen in fluoride - oxidation melt peculiar to electroslag remelting composition in the field of 1600-1700 (С are considered. Thermodynamics, kinetics and mechanisms of the miscellaneous stage of hydrogen interfacial turning in system gas-slag and gas-slag-metal during electroslag remelting process are explored and analyzed. On the base of obtained data nature of the interaction component melts is evaluated and main regularities of the fluoride - oxidation melts shaping are determined.