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Implementation of an YSZ coating material to prevent clogging of the submerged entry nozzle (SEN) during continuous casting of Ce-treated steels
Dalarna University, School of Technology and Business Studies, Materials Technology.ORCID iD: 0000-0001-6996-5001
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2016 (English)In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812, 1-9 p.Article in journal (Other academic) Epub ahead of print
Abstract [en]

The possibility to reduce clogging in the submerged entry nozzle (SEN) during continuous casting of Ce alloyed stainless steels has been studied. This was done by implementing a new plasma coating material, consisting of yttria stabilized zirconia (YSZ). The coating was first tested in pilot-plant trials; where the amount of steel teemed through the plasma coated nozzles was monitored. Thereafter, samples of the coatings from the nozzles were studied using a FEG-SEM equipped with EDS. In addition, the coating material was tested in industrial trials where the performance was judged with respect to the clogging tendency detected as the movement of the stopper rod. The results from both the pilot-plant trials and industrial trials showed that the use of an YSZ coating led to a decreased clogging tendency during the casting in comparison to when using an uncoated SEN. Specifically, the pilot-plant trials showed that the clogging factor was lowered when implementing the YSZ coatings. Furthermore, the industrial trials showed that the clogging tendency, measured by the stopper rod movements, were lower when implementing the YSZ coating.

Place, publisher, year, edition, pages
2016. 1-9 p.
Keyword [en]
Continuous casting, Clogging, Rare earth metals, Submerged entry nozzle, New coating material, Plasma coating, Yttria stabilised zirconia, Stainless steel, Pilot-plant trials, Industrial plant trials
National Category
Metallurgy and Metallic Materials
Research subject
Steel Forming and Surface Engineering, Studier angående bildningsmekanismer för igensättningar i gjutrör
URN: urn:nbn:se:du-23393DOI: 10.1080/03019233.2016.1245916OAI: oai:DiVA.org:du-23393DiVA: diva2:1047280
JERNKONTORETS FORSKNING, Delrapport från pilotförsök och industriförsök med ZrO2-belagda dysor och gjutrör genomförda hos ComdiCast AB respektive Outokumpu Stainless AB, Förbättrad processteknik vid stränggjutning av stål speciellt känsliga för igensättningar, Kommitté JK 23052
VINNOVA, Kommitté JK 23052
Available from: 2016-11-17 Created: 2016-11-17 Last updated: 2016-11-18Bibliographically approved

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