МОДЕЛИРОВАНИЕ ФАЗОВО-СТРУКТУРНОГО СОСТОЯНИЯ И УПРАВЛЕНИЕ СВОЙСТВАМИ МЕТАЛЛА СИСТЕМЫ ЛЕГИРОВАНИЯ Fe-Cr-Mn, НАПЛАВЛЕННОГО НА НИЗКОУГЛЕРОДИСТУЮ КОНСТРУКЦИОННУЮ СТАЛЬ

A physical-mathematical model was developed. It describes formation of a structure of deposited metal of Fe-Cr-Mn alloying system and binds its chemical composition, critical points of martensite transformation ( Mi, Mf), phase-structure state and nature of their layer-by-layer variation on thickness of the deposited metal. The model allows designing and regulating chemical and phase compositions (austenite, austenite-martensite, martensite-austenite, martensite) of metal of Fe-Cr-Mn alloying system deposited on steel St3 that provides the possibility to regulate service properties of the deposited metal. Specific conditions of operation of the deposited parts require selection of phase composition of the deposited metal (content of quenching martensite and metastable austenite), level of γ-phase metastability providing optimum development of deformation γ→α´ transformation and acquiring of the most significant effect of strengthening in process of testing and operation. 14 Ref., 1 Tabl., 5 Fig. [ABSTRACT FROM AUTHOR]