WIELGOSZ Ewa AGH University of Science and Technology

Spoluautoři KARGUL Tomasz, FALKUS Jan

Reliable knowledge of thermo-physical properties of materials is essential for the interpretation of solidification behavior, forming, heat treatment and joining of metallic systems. It is also a precondition for precise simulation calculations of technological processes. Modeling usually requires the knowledge of temperature dependencies of three basic thermo-physical properties: heat capacity or enthalpy, density and thermal conductivity. Nowadays many software packages for thermodynamic calculations enable to calculate specific heat or enthalpy on the basis of chemical composition. However, the results of calculation must be verified experimentally. Paper deals with a problem of specific heat measurements for steels in wide temperature region, from room to solidus temperature. The method used for investigations was Differential Scanning Calorimetry (DSC), which is one of the most common used techniques of thermal analysis in the field of metallurgy. The results of calculations using FactSage with SGTE database and experimental data were compared for three steel grades. Very good agreement was obtained. On the basis of specific heat results the enthalpy changes with temperature were calculated for each steel grade. Obtained values of thermal properties depend on chemical composition and temperature. It is important to investigate the thermal properties for concrete steel grades for modeling processing or casting.

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