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Studies of the decarburisation phenomena during preheating of submerged entry nozzles (SEN) in continuous casting processes
Dalarna University, School of Technology and Business Studies, Materials Technology. KTH.ORCID iD: 0000-0001-6996-5001
Dalarna University, School of Technology and Business Studies, Materials Technology. KTH.
KTH.
2016 (English)In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812Article in journal (Refereed) Epub ahead of print
Abstract [en]

Decarburisation of the submerged entry nozzles (SEN) during the preheating process wasinvestigated based on plant trials and thermodynamic modelling at three different steel plants.During the trials the preheating processes were mapped, the temperature profiles wereregistered and post-mortem studies of the SENs with scanning electron microscopy wereperformed. Typically, the glass/silicon powder will form a dense and protective layer inside theSEN when heated over 1100°C. However, this study found that the temperature distributioninside the SEN did not always reach this critical temperature. Thus, decarburisation of the SENwas found at all steel plants. The overall results illustrate that the control of the preheatingprocess needs to be improved at all steel plants. It is suggested that future research should befocused on the development of new coating materials to prevent decarburisation of therefractory base material, which would decrease the chances of clogging during casting.

Place, publisher, year, edition, pages
Taylor & Francis, 2016.
Keyword [en]
Continuous casting, Industrial plant trials, Preheating, Decarburisation, Submerged entry nozzle
National Category
Metallurgy and Metallic Materials
Research subject
Steel Forming and Surface Engineering, Studier angående bildningsmekanismer för igensättningar i gjutrör
Identifiers
URN: urn:nbn:se:du-21260DOI: 10.1080/03019233.2016.1156900OAI: oai:DiVA.org:du-21260DiVA: diva2:913817
Conference
6th International Congress on the Science and Technology of Steelmaking, ICS 2015
Projects
Jernkontoret TO23052
Funder
VINNOVA
Note

Ingår i Jernkontorets forskning: Strategiskt stålforskningsprogram för Svergie 2007-2012. 

Projekttittel: Förbättrad processteknik vid stränggjutning av stål speciellt känsliga för ingensättning.

Available from: 2016-03-22 Created: 2016-03-21 Last updated: 2016-09-26Bibliographically approved

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