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Nathalie Gruber (Montanuniversität Leoben)12/03/2026, 13:30Impact of new upstream production lines on surface quality in continuous castingOral Presentation
During the continuous casting of steels, a carbon-enriched layer forms on top of the liquid slag. Owing to fluctuations in the mold, liquid steel may come into contact with this layer, leading to re-carburization. Previous attempts to mitigate this phenomenon seemed insufficient for the intended applications; therefore, mold powders with reduced or zero carbon content are desired. For mold...
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Rahul Sarkar (IIT Kanpur)12/03/2026, 13:55Impact of new upstream production lines on surface quality in continuous castingOral Presentation
Mold fluxes are critical in continuous casting (CC), because they control both lubrication and heat transfer in the CC mould. Heat transfer is primarily influenced by the crystallization behaviour of the mould flux, while lubrication depends on the viscosity of the slag pool formed by molten flux. Primarily, these two factors depend on the type and composition of mould fluxes used for casting...
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Milad Mahdi (Prosimet SpA)12/03/2026, 14:20Impact of new upstream production lines on surface quality in continuous castingOral Presentation
Tundish covering powders are prone to sintering, which leads to crust formation during steel
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casting operations. Sintering occurs through atomic diusion within the microstructure, driven
by chemical potential gradients, and typically becomes significant at temperatures above
approximately 70% of the material’s melting point. To delay this phenomenon, carbon—
characterized by a very high... -
Marc Faverjon (DEREF SpA)12/03/2026, 14:45Impact of new upstream production lines on surface quality in continuous castingOral Presentation
Exposure to Respirable Crystalline Silica is one of the main health issues for workers when using certain acidic tundish covering powders, such as rice ash. Since exposure to RCS is considered as carcinogenic, the EU has introduced a VLE and an obligation to control the exposure levels in workplaces.
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Acidic tundish powder is required to cast certain steel grades in medium-long sequence. They... -
Mirko Javurek (Johannes Kepler Universität Linz, Institut für Strömungslehre und Wärmeübertragung)12/03/2026, 15:40Fluid flow in SEN and Mold: Simulation and measurementsOral Presentation
In continuous steel casting, the turbulent liquid steel flow in the mold has a significant influence on the produced steel quality. The varying process parameters casting speed and inert gas injection at the stopper rod tip influence the mold flow pattern. Most investigations consider the original geometry of the submerged entry nozzle. During the casting process, material deposition and...
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Gernot Hackl (RHI Magnesita GmbH)12/03/2026, 16:05Fluid flow in SEN and Mold: Simulation and measurementsOral Presentation
Simulation-based analysis of flow phenomena in continuous casting moulds is a mature and well-established practice. Commonly applied approaches include Computational Fluid Dynamics (CFD) and physical modelling techniques, such as water modelling and, more recently, liquid metal experiments. These methods enable detailed evaluation of submerged entry nozzles (SEN) performance and support their...
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Ebrahim Karimi Sibaki (Montanuniversitaet)12/03/2026, 16:30Oral Presentation
Surface defects in continuous casting are often initiated by transient multi-phase flow in the mold: asymmetric/oscillating jets, meniscus instabilities, and near-surface transport and entrapment of inclusions and slag droplets. This talk presents multi-phase flow simulations to quantify these mechanisms, benchmarked against water-model experiments.
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Electromagnetic braking (EMBr) is discussed... -
Carlo Mapelli (Politecno di Milano)13/03/2026, 08:30Surface quality of long and flat semis: Plant results and lab experimentsOral Presentation
This work investigates the critical correlation between electromagnetic stirrer (EMS) operation in a continuous casting mold and the formation of internal defects in cast billets. While EMS intensity must be increased, particularly for square billet formats, to achieve sufficient molten steel agitation and homogenization, this study highlights the detrimental side effects of such...
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Federica Di Giovanni (Feralpi Siderurgica S.p.A.), Giulia Buratti (Feralpi Siderurgica S.p.A.)13/03/2026, 08:55Surface quality of long and flat semis: Plant results and lab experimentsOral Presentation
In the continuous casting of steel billets, the initial solidification at the meniscus is the critical determinant of surface quality. The shell characteristics and geometry are intrinsic features of the process, resulting from the interaction between mold process parameters and the solidifying meniscus. However, defects and irregularities significantly alter the local heat transfer...
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Sara Busolini (ABS - Acciaierie Bertoli Safau S.p.A.)13/03/2026, 09:20Surface quality of long and flat semis: Plant results and lab experimentsOral Presentation
Surface quality is a well-known critical factor affecting the fatigue life of components. Therefore, the quality of the initial feedstock is mandatory for producing wire rod suitable for high stress applications, such as automotive suspension springs. This paper describes the successful experience of ABS (Acciaierie Bertoli Safau, Italy) during the development of a dedicated casting process of...
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Takuya Takayama (Montanuniveristaet Leoben)13/03/2026, 09:45Surface quality of long and flat semis: Plant results and lab experimentsOral Presentation
The required properties and the higher strength demands for steel products have been increasing in recent years, leading to the various production routes and the increase in the content of alloying elements. Furthermore, steel industries are facing pressure to transform their production processes to achieve a carbon-neutral society. In these environmental changes, maintaining and further...
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Mr Stefano Baf13/03/2026, 10:40New engineering concepts for improvement of surface qualityOral Presentation
One of the typical quality problems of near-net-shape products such as the beam blank is the appearance of surface and sub-surface cracks. The complex shape of the mould makes the casting of crack sensitive grades particularly challenging. This paper describes the process of modifying an existing beam blank section to improve its quality performance. It starts with the analysis carried out to...
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5. Our Segments like it hot – how Smart Segment Engineering directly influences Slab Surface QualityDr Kerstin Baumgartner (Primetals Technologies Austria GmbH)13/03/2026, 11:05New engineering concepts for improvement of surface qualityOral Presentation
Continuous casting of slabs demands stringent control of thermal and mechanical conditions to ensure crack-free surfaces and dimensional accuracy. The rising concentration of tramp elements in steel, resulting from modern steelmaking practices, significantly increases susceptibility to hot cracking, particularly within the straightening zone. Maintaining temperatures above the second...
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Michael Bernhard (voestalpine Stahl Linz GmbH)13/03/2026, 11:30Oral Presentation
Casting 355 mm ultra thick slabs at voestalpine’s CC7 caster - designed for three casting thicknesses (225, 285, and 355 mm) and widths up to 2,200 mm, with a 10 m bow radius - pushes surface integrity and slab geometry control to their limits. This extreme section size range combined with the 10 m bow radius induces severe thermal gradients and mechanical stresses, which negatively affect...
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Gerald Klösch (voestalpine Stahl Donawitz)13/03/2026, 13:00Surface quality prediction in cc at the crossroads: From phenomenological models to data driven models and hybrid approachesOral Presentation
Rising demands on the surface quality and the necessity for 100% inspected billets are requested by the customers. Surface defects on billets, like longitudinal or transversal cracks, can – if not removed e.g. by grinding - lead to increased reject rates, or in the worst case to a complete production stop, in the further rolling process route.
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The surface inspection at voestalpine Stahl... -
Sung-Suk Jung (Posco)13/03/2026, 13:25Surface quality prediction in cc at the crossroads: From phenomenological models to data driven models and hybrid approachesOral Presentation
Designing the continuous casting process of advanced high strength steels(AHSS) requires precise simulation of fracture formation based on high-temperature properties of steel grades and casting conditions in order to minimize surface defects of the slab. Reduction of area(RA) as an indicator of ductility was utilized to correlate with the cracking performance of the continuous caster of...
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Julius Norrena (University of Oulu)13/03/2026, 13:50Surface quality of long and flat semis: Plant results and lab experimentsOral Presentation
The surface quality of continuously-cast products remains an important research topic due to its economic and practical implications for steelmakers. Surface quality problems are generally attributed to the presence of various kinds of defects originating from continuous casting. While the root causes of defects can be considered well-defined in scientific literature today, a frequent...
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Oliver Lang (Primetals Technologies Austria)13/03/2026, 14:15Surface quality prediction in cc at the crossroads: From phenomenological models to data driven models and hybrid approachesOral Presentation
The quality of continuously cast slabs is strongly influenced by steel grade and casting parameters. The Strand Quality Index (SQI) enables probabilistic prediction of crack formation based on these factors. By integrating the Mold Expert, which calculates depressions in the mold using temperature profiles, the SQI now receives additional event information, significantly improving the accuracy...
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Georg Gaiser (Montanuniveristaet Leoben)13/03/2026, 14:40Surface quality prediction in cc at the crossroads: From phenomenological models to data driven models and hybrid approachesOral Presentation
The transition toward low-carbon steelmaking increases the reliance on scrap-based electric arc furnace routes, inevitably introducing higher levels of tramp elements such as Cu and Sn. Because these elements cannot be removed through conventional metallurgical refining, they may influence subsequent process steps. Their distinct oxidation behavior promotes the formation of low-melting,...
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Alma Olivos-Suarez (Tata Steel)Fluid flow in SEN and Mold: Simulation and measurementsOral Presentation
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