Study on the thermodynamic stability and evolution of inclusions in Al–Ti deoxidized steel

Abstract To investigate the thermodynamic stability and evolution process of inclusions in Al–Ti deoxidized steels, both laboratory experiments calculations were conducted present work. Scanning electron microscope-energy dispersive spectrometer (SEM-EDS) Al 2 O 3 –Ti –TiO phase diagrams used to composition oxide after adding various contents Ti. The results show that TiO x content increases with increase titanium addition steel ranging from 0.31 1.88%, typical are transferred pure multi-phase complex uniform composition. first increased then decreased extension deoxidation time steels deoxidants [% Al] = 0.055 0.71, is highest at 360 s deoxidation. There a small amount liquid composite 0.13 Ti] 1.88 120 deoxidation, this part gradually turns into -rich phase. predominance Al–Ti–O–Fe system obtained based on classical calculation FactSage different databases products. calculated compared experimental data, discrepancies stable region oxides discussed. transformation during solidification analyzed calculation.