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KAVIČKA, F. STRÁNSKÝ, K. DOBROVSKÁ, J. DOBROVSKÁ, V. FRANCOVÁ, H. SMETANA, B.
Original Title
Experimental Analysis on the Causes of the Breakout of Continuous Cast Steel Slab
Type
journal article in Web of Science
Language
English
Original Abstract
The paper deals with investigation into segregation behavior of selected elements in longitudinal cut of continuous steel slab, in the breakout area. The breakout occurred after a flying change of tundish in order to begin casting of another steel grade. Altogether 11 samples were taken from the part of a solidified slab. Concentrations of selected elements (Al, Si, P, S, Cr, Mn, Ni and Mo) were measured in these samples using scanning electron microscope and energy dispersive spectroscopy. Using the original mathematical models the basic micro segregation characteristics and the parameter of macro-heterogeneity were further determined for each analyzed element. Then a quantitative measurement of inclusions ("micro purity") in the samples was performed using a metallographic microscope. Then method of differential thermal analysis was used for the measurements of temperatures of phase transformations. The following main results were found: Magnitude of micro segregation of the analyzed elements in the measured sections of 1000 mikrom is approximately the same in all the analyzed samples.Chemical macro heterogeneity is very high across the analyzed slab section.Very uneven mixing of melts of both steels was probably one of the main causes of formation of the breakout.
Keywords
micro-segregation, continuously cast slab, steel, breakout, intermixing
Authors
KAVIČKA, F.; STRÁNSKÝ, K.; DOBROVSKÁ, J.; DOBROVSKÁ, V.; FRANCOVÁ, H.; SMETANA, B.
RIV year
2014
Released
9. 4. 2014
ISBN
0255-5476
Periodical
Materials Science Forum
Year of study
782 (2014)
Number
Apr/09
State
Swiss Confederation
Pages from
67
Pages to
72
Pages count
6
BibTex
@article{BUT107373, author="František {Kavička} and Karel {Stránský} and Jana {Dobrovská} and Věra {Dobrovská} and Hana {Francová} and Bedřich {Smetana}", title="Experimental Analysis on the Causes of the Breakout of Continuous Cast Steel Slab", journal="Materials Science Forum", year="2014", volume="782 (2014)", number="Apr/09", pages="67--72", doi="10.4028/www.scientific.net/MSF.782.67", issn="0255-5476" }