The paper deals with the study of key thermophysical properties - phase transition temperatures (liquidus, peritectic transformation and solidus) with use of DTA (Differential Thermal Analysis) and “direct” thermal analysis (TA). Results obtained with these two very often used methods at heating and cooling process are presented. There are presented results from the high temperature region with focus on the melting and solidifying region of Fe-C-Cr-Ni-Mo based metallic alloys. The paper discusses obtained results at heating/cooling process, with different loads of analyzed samples and other factors that can influence the obtained results. The evaluation of DTA – curves and heating/cooling curves is demonstrated. The obtained experimental phase transition temperatures are mutually compared and discussed. Temperatures of liquidus, peritectic transformation and solidus are discussed with values theoretically calculated by selected SWs, such as Thermo-Calc and IDS (solidification analysis package) and with values delivered by steel company producer. Differences between liquidus, peritectic transformation and solidus temperatures were encountered (in some cases substantial) between theoretical and experimental values.Keywords: temperatures, liquidus, peritectic transformation, solidus, FeCCrNi-Mo alloys
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