Calculation of Solidification‐Related Thermophysical Properties of Steels Based on Fe‐C Pseudobinary Phase Diagram

Abstract

In order to be accurate for the reliability of real‐time heat transfer model for online control of continuous casting process of steel and also to be easily embeddable, special algorithms have been developed for calculation of solidification‐related thermophysical properties of carbon and low alloy steels. These thermophysical properties include density, thermal conductivity, and enthalpy‐related data, i.e., enthalpy and specific heat. In the algorithms, Fe‐C pseudobinary phase diagram, which is similar to Fe‐C phase diagram but is influenced by contents of steel alloying elements other than carbon, has been introduced as the basis to solve the phase fractions of steel as functions of temperature. Associated with the solved phase fractions, the thermophysical properties can be calculated from 1600 to 0 °C by combining corresponding data of different phases, which are fitted as polynomial functions of temperature and steel composition. Finally, the algorithms have been tested as the calculated results showed good agreement with the calculated data by software JMatPro and also the measured data.

3D Transient Heat Transfer Simulation and Optimization for Initial Stage of Steel Continuous Casting Process

“…The thermal properties including ρ, H, f s , k s and k l are assumed to be functions of T and of the steel compositions. And these properties can be calculated by our specially designed algorithm based on pseudo-binary phase diagram 25) .…”

Determination of Austenite Decomposition Temperatures Using Thermodynamic Sw Factsage

“…Here, too, restrictions apply about the studied chemical composition of steel. Another of the mentioned methods can be, for example, the determination of thermophysical properties of steels using the pseudo-binary phase diagram Fe-C mentioned in [11].…”

“…The method of multiple regression analysis was used for the regression equations of the austenite decomposition temperature depending on the chemical composition [11,12]. It is used in cases in which it is necessary to find out certain quantitative variables on one or more other quantitative variables, so-called regressors.…”

Research and Development of the Solidification of Slab Ingots from Special Tool Steels

“…Another way to determine the thermophysical properties of steel is by means of calculation using Fe-C Pseudobinary Phase Diagrams [13]. In the algorithms, the Fe-C pseudobinary phase diagram, which is similar to the Fe-C phase diagram but is influenced by the contents of steel alloying elements other than carbon, has been introduced as the basis for solving the phase fractions of steel as functions of temperature.…”