Abstract
The effect of titanium and aluminum contents on the formation and evolution of inclusions were investigated in Fe-17Cr-9Ni austenite stainless steel at 1873 K. Homogeneous spherical FeOy-CrOz-MnO-SiO2 was the main inclusion before titanium and aluminum were added. Thermodynamic calculations indicated that when the Al content exceeds 0.0085 wt pct and Ti content exceeds 0.036 wt pct, spherical FeOy-CrOz-MnO-SiO2 inclusions can be reduced to irregularly shaped Al2O3 and TiOx inclusions, respectively. The formation of TiN on the surface of Al-Ti-O inclusions can prevent the reduction of Al-Ti-O by Al or Ti. Moreover, the different formation mechanisms of Al-Ti-O inclusions and TiN are discussed. When Ti was added to reduce Al2O3, the added Ti initially caused the formation of Al-Ti-O inclusions and then reacted with N in the molten steel to form TiN. On the other hand, in the case of the addition of Al to reduce TiOx, the formed reduction products were Al-Ti-O inclusions and Ti dissolved in molten steel, the latter being an important source of Ti in the later formed TiN. The TiN found in the experimental samples is more likely to be formed in molten steel at a temperature of 1873 K than during cooling.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
