BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 19a
SUMMARY:Solidification microstructure of a continuously cast HSLA steel slab with U-shape centerline segregation
DESCRIPTION:Macro and microsegregation play an important role in understanding the solidification behavior of continuously cast steels. Both affects directly critical applications, which requires a higher degree of homogeneity since as cast stage. This study applied macro and micro approaches to perform a comprehensive characterization of the solidification microstructure of a slab with U-shape centerline segregation. In the macro-approach, a width-wise chemical analysis was performed using OES-PDA on whole centerline. Thickness-wise analysis was also implemented at 300 mm intervals in width direction. Carbon content in centerline was almost 3 times higher than at a point 37.5 mm below the surface. The same behavior happenned with P, S, Ti and Nb. The micro-approach in this study considered SDAS (Secondary Dendrite Arm Spacing) and second phase particles. Calculated figures presented very good correspondence with measured ones for both micro-approach features. Mushy zone was calculated using CON1D model and phase fraction was calculated both by CON1D and FactSage 8.2. NbC, TiN and MnS were the most relevant second phase particles calculated by Factsage. This finding matches to the analysis carried out by SEM-EDS. Based on these results, which measured values were in good agreement with calculated ones, it is possible to estimate the internal quality of slabs in a higher degree of confidence. 
CLASS:PUBLIC
DTSTART:20230614T092000
DTEND:20230614T094000
END:VEVENT
END:VCALENDAR