Different Approaches to Trace the Source of Non-Metallic Inclusions in Steel
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AISTech 2023 - Proceedings of the Iron & Steel Technology Conference. 2023. S. 1115-1121.
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TY - GEN
T1 - Different Approaches to Trace the Source of Non-Metallic Inclusions in Steel
AU - Thiele, Kathrin
AU - Ilie, Sergiu
AU - Rössler, Roman
AU - Walkner, Christoph
AU - Meisel, Thomas C.
AU - Prohaska, Thomas
AU - Michelic, Susanne Katharina
PY - 2023/5/9
Y1 - 2023/5/9
N2 - Improvement of steel cleanness requires detailed knowledge about the formation of non-metallic inclusions. Tracing inclusionsand potential sources is an effective tool for studying inclusion evolution. In the paper, two tracing approaches are evaluated.First, classical tracer experiments are performed, where rare earth elements (REE) like La or Ce are deliberately added to themelt on an industrial scale to mark the inclusions directly. Second, the natural REE multi-element fingerprint of the inclusionsis compared to the REE multi-element pattern of potential sources such as alloying and auxiliary materials. These REEdistributions profiles are interpreted by normalizing the REE fractions to reference values. REE contents are analyzed byinductively coupled plasma mass spectrometry in all cases. Both approaches are applied to track the source of clogged materialin the submerged entry nozzle from Ti-ULC steel production. Results show a clear connection between inclusions resultingfrom deoxidation and the clogged layer in the SEN.
AB - Improvement of steel cleanness requires detailed knowledge about the formation of non-metallic inclusions. Tracing inclusionsand potential sources is an effective tool for studying inclusion evolution. In the paper, two tracing approaches are evaluated.First, classical tracer experiments are performed, where rare earth elements (REE) like La or Ce are deliberately added to themelt on an industrial scale to mark the inclusions directly. Second, the natural REE multi-element fingerprint of the inclusionsis compared to the REE multi-element pattern of potential sources such as alloying and auxiliary materials. These REEdistributions profiles are interpreted by normalizing the REE fractions to reference values. REE contents are analyzed byinductively coupled plasma mass spectrometry in all cases. Both approaches are applied to track the source of clogged materialin the submerged entry nozzle from Ti-ULC steel production. Results show a clear connection between inclusions resultingfrom deoxidation and the clogged layer in the SEN.
KW - clogging
KW - non-metallic inclusion
KW - rare earth elements
KW - tracer
KW - rare earth fingerprint
U2 - 10.33313/387/122
DO - 10.33313/387/122
M3 - Conference contribution
SP - 1115
EP - 1121
BT - AISTech 2023 - Proceedings of the Iron & Steel Technology Conference
T2 - AISTech 2023
Y2 - 8 May 2023 through 11 May 2023
ER -
