Abstract
To investigate the effect of magnesium addition on the evolution of inclusions in medium-manganese steel with different aluminum contents, both thermodynamic calculation and high-temperature simulation experiments were carried out in the present work. The in situ observation experiments were used to clarify the related evolution process of inclusions. The samples taken from the melts were analyzed by scanning electron microscopy and energy dispersive spectroscopy. The compositions of steel were determined by inductively coupled plasma-optical emission spectrometer. The results show that the aluminum content in steel has a certain influence on the magnesium content, under the same conditions, magnesium content increases with increasing aluminum content. The inclusions transformed from MnO·Al2O3 to Al2O3 when the aluminum content was higher than 0.0076 mass pct. After magnesium treatment, the inclusions gradually transformed into MgO·Al2O3, and the MgO/Al2O3 mole ratio in inclusions decreased with the increase of aluminum content. The diameter of the inclusions decreased, and number density of inclusions increased in steel after magnesium addition. The phenomenon that large-sized cluster-like Al2O3 inclusions transform into finely dispersed Mg-containing inclusions was firstly observed in situ by confocal laser scanning microscope.
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.
