{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-LBMCXDFH/24d438d1-b69d-4b72-98ae-8f7be68e08cc/HTML","dcterms:extent":"22 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-LBMCXDFH/aa3975c3-a4e6-4138-b3aa-988a2bad1977/PDF","dcterms:extent":"622 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-LBMCXDFH/f7eb51c7-e7b9-4c6f-9ddf-02902582079e/TEXT","dcterms:extent":"20 KB"}],"edm:TimeSpan":{"@rdf:about":"2000-2024","edm:begin":{"@xml:lang":"en","#text":"2000"},"edm:end":{"@xml:lang":"en","#text":"2024"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:DOC-LBMCXDFH","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/urn:nbn:si:spr-ihg6vo21"},{"@xml:lang":"sl","#text":"Materiali in tehnologije"}],"dcterms:issued":"2012","dc:creator":["Kavička, František","Klimeš, Lubomír","Mauder, Tomáš","Štětina, Josef"],"dc:format":[{"@xml:lang":"sl","#text":"številka:2"},{"@xml:lang":"sl","#text":"letnik:46"},{"@xml:lang":"sl","#text":"str. 155-160"}],"dc:identifier":["ISSN:1580-2949","COBISSID:930730","URN:URN:NBN:SI:doc-LBMCXDFH"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"dc:subject":[{"@xml:lang":"en","#text":"concast billet"},{"@xml:lang":"en","#text":"continuous casting"},{"@xml:lang":"en","#text":"heat transfer"},{"@xml:lang":"sl","#text":"kontinuirno ulite gredice"},{"@xml:lang":"sl","#text":"kontinuirno ulivanje"},{"@xml:lang":"en","#text":"numerical model"},{"@xml:lang":"sl","#text":"numerični model"},{"@xml:lang":"sl","#text":"prenos toplote"},{"@xml:lang":"en","#text":"solidification"},{"@xml:lang":"sl","#text":"strjevanje"},{"@rdf:resource":"http://www.wikidata.org/entity/Q925667"}],"dcterms:temporal":{"@rdf:resource":"2000-2024"},"dc:title":{"@xml:lang":"sl","#text":"Final-structure prediction of continuously cast billets| Napoved končne mikrostrukture kontinuirno ulitih gredic|"},"dc:description":[{"@xml:lang":"sl","#text":"In steel production, controlling and monitoring quality, grade and structure of final steel products are very important issues. It has been shown that the temperature distribution, the magnitude of temperature gradients, as well as the cooling strategy during the continuous steel casting have a significant impact on material properties, the structure and any defect formation of cast products. The paper describes an accurate computational tool intended for investigating the transient phenomena in continuously cast billets, for developing the caster control techniques and also for determining the optimum cooling strategy in order to meet all quality requirements. The numerical model of the temperature field is based on the finite-difference implementation of the 3D energy-balance equation using the enthalpy approach. This allows us to analyse the temperature field along the entire cast billet. Since the steel billets are produced constantly 24 hours per day, the transient temperature field is being computed in a non-stop trial run. It enables us to monitor and investigate the formation of the temperature field in real time within the mould, as well as the secondary and tertiary cooling zones, where the observed information can be immediately utilized for the caster-control optimization with respect to the whole machine or just an individual part. The application of the presented model is demonstrated with two examples including the steelworks in Toinec, Czech Republic, and in Podbrezová, Slovakia. To consider different operational conditions, the influences of the secondary-cooling setting on the surface and the inner defects formation, and on the final structure of the 150 x 150 mm billet are also discussed"},{"@xml:lang":"sl","#text":"Pri proizvodnji jekla je pomembno izvajanje kontrole kvalitete, vrste in mikrostrukture končnih proizvodov. Prikazano je, da ima razporeditev temperature, razpon temperaturnega gradienta, kot tudi strategija ohlajanja med kontinuirnim ulivanjem pomemben vpliv na lastnosti materiala, mikrostrukturo in možnost nastanka napak v litem proizvodu. V članku je predstavljeno natančno računalniško orodje za preiskave prehodnih pojavov v kontinuirno uliti gredici. Orodje je namenjeno razvoju kontrolne tehnike in tudi za določanje optimalne strategije ohlajanja za doseganje zahtevane kakovosti. Numerični model temperaturnega polja temelji na uporabi končnih diferenc 3D-enačbe energijskega ravnotežja z uporabo entalpije. Omogoča analizo temperaturnega polja vzdolž celotne lite gredice. Ker je proizvodnja gredic stalna, 24 ur na dan, je bilo prehodno temperaturno polje izračunano za neprekinjeno preskusno obratovanje. Omogočena je kontrola in preiskava nastanka temperaturnega polja v realnem času v kokili, v sekundarni in terciarni hladilni coni. Ugotovljena informacija se lahko neposredno uporabi za optimiranje celotne livne naprave ali pa samo posameznega dela. Uporaba predlaganega modela je prikazana za dva primera iz železarne Třinec na Češkem in železarne Podbrezová na Slovaškem. Prikazan je tudi vpliv nastavitve sekundarnega ohlajanja na nastanek površinskih in notranjih napak na gredici 150 mm x 150 mm pri različnih obratovalnih razmerah"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:DOC-LBMCXDFH","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:DOC-LBMCXDFH"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:DOC-LBMCXDFH/aa3975c3-a4e6-4138-b3aa-988a2bad1977/PDF"},"edm:rights":{"@rdf:resource":"http://rightsstatements.org/vocab/InC/1.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:DOC-LBMCXDFH/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:DOC-LBMCXDFH"}}}}