3 research outputs found
KINETICS OF PHASE TRANSFORMATIONS IN HIGH-CARBON ALLOYS OF THE Fe–Cr–C SYSTEM
A model is presented of phase transformations (dissolution of M7C3 carbides in austenite on heating, carbide precipitation on cooling, pearlite and martensite transformations) in the Fe–Cr–C alloys. It permits to predict the results of heat treatment or to select the chemical composition of an alloy for prescribed requirements.Представлена модель основных фазовых превращений (растворение карбидов M7C3 в аустените при нагреве, выделение вторичных карбидов при охлаждении, перлитного и мартенситного превращений аустенита) в сплавах типа штамповых сталей или износостойких чугунов, относящихся к системе Fe–Cr–C. Модель позволяет предсказывать результаты термической обработки или подбирать химический состав сплава по заданным требованиям
A kinetic model of lath martensite formation
A kinetic theory of martensite formation is developed for the case when isothermal transformation does not complete, which is conventionally explained in terms of the change in the state of phase. The closest agreement with experiment is obtained when the Kaufman-Cohen theory modifie by Borgenstam and Hillert is used for the nucleation rate