Dynamic dynamic differential scanning calorimetry (DSC) is a commonly used technique for analyzing steels and metals. Linear heating and cooling experiments using DSC can phase transitions and their enthalpy and enable the determination of the solidus-liquidus lines, which indicate the temperatures at which the sample melts and crystallizes.
The graph shows the heating and cooling curves of a low-alloy steel sample, measured using a dynamic high-temperature differential calorimeter (HDSC L62). At 734 °C, changes in the crystal structure and in the magnetic properties (from ferromagnetic to paramagnetic) occurred.
The melting point can be seen at 1,411 °C. The liquidus temperature was measured at 1,473 °C. All peak values are reversible and can also be observed in the cooling segment (blue curve). The crystallization range ranges from 1,454 °C to 1,436 °C, and the phase transition to the ferromagnetic state occurs at a temperature of 637 °C.
