Thermal analysis of high temperature phase transformations of steel

Abstract

The series of thermal analysis measurements of high temperature phase transformations of real grain oriented electrical steel grade under conditions of two analytical devices (Netzsch STA 449 F3 Jupiter; Setaram SETSYS 18TM) were carried out. Two thermo analytical methods were used (DTA and Direct thermal analysis). The different weight of samples was used (200 mg, 23 g). The stability/reproducibility of results obtained by used methodologies was verified. The liquidus and solidus temperatures for close to equilibrium conditions and during cooling (20 °C/min; 80 °C/min) were determined. It has been shown that the higher cooling rate lead to lower temperatures for start and end of solidification process of studied steel grade.

Keywords

• steel
• thermal analysis
• liquidus temperature
• solidus temperature