The samples were heated up to the austenite temperature
(860 C), and to provide a homogenous temperature distribution
they were kept inside the furnace for 30 min. The quenching operation continued for 10 min. All samples were processed in the
same manner. The temperature values were transmitted to the signal reader (Almemo 5990-2) via the thermo-couples. The values
received from the signal reader were recorded in the computer.