Differential scanning calorimetry study of peritectic steel grades

Differential scanning calorimetric (DSC) measurements to identify high-temperature phase transitions of two non-alloyed peritectic steel grades are presented and discussed in this paper. Netzsch STA 449 F3 Jupiter thermal analyser device was used to perform DSC experiments. Measurements of temperatures of phase transformations at the heating and cooling rates of 5 and 20 A degrees C min(-1) were conducted. Measurement conditions for determining the temperature of peritectic transition in two real steels grades were described. The influence of measurement conditions on the results of DSC analysis was discussed. It was found that heating rate slightly affects the temperature of peritectic phase transition. Experimentally obtained solidus and liquidus temperatures are in good agreement with values derived by numerical calculations using FactSage software with database developed by Scientific Group Thermodata Europe. New original data (phase-transition temperatures) were obtained in this study, which may, however, be used for modelling of the solidification behaviour of peritectic steel grades.