Abstract:
The purpose of the simulation, to predict the precipitation of carbides in steels, is to evaluate, through the basic principles of chemical thermodynamics, the types of carbides formed concerning the chemical composition and temperatures during the manufacturing process. In this case, the FactSage software is a valuable tool to predict the behavior of precipitation and solubilization of these carbides. With the development of microalloyed and stainless steels to serve different industrial areas, it is necessary to know the characteristics of the carbides formed, as they are essential in the physical and chemical properties of these materials. In this work, the theoretical and experimental factors that influence the analysis simulations with the FactSage software version 8.0 were evaluated. To simulate, the chemical compositions of a microalloyed steel and an austenitic stainless steel AISI 302 were used using different bases and varying the temperature from 100 ºC to 1400 ºC. To determine the results, the activity coefficients of the analyzes and different parameters for the simulations were used. The results showed that the precipitation of carbides of the type M23C6, M7C3, and M3C have activity coefficients below 1, being necessary to select specific base phases for these precipitations to be detected on graphics.