Publication detail
Study of cooling rate effect on back-diffusion during solidification of continuously cast steel billet
KAVIČKA, F. DOBROVSKÁ, J. DOBROVSKÁ, V. FRANCOVÁ, H.
Czech title
Studie vlivu rychlosti ochlazování na zpětnou difuzi během tuhnutí kontinuálně litého ocelového sochoru
English title
Study of cooling rate effect on back-diffusion during solidification of continuously cast steel billet
Type
journal article - other
Language
en
Original abstract
Chemical heterogeneity of elements is predominant cause of imperfections and defects of cast and formed steel products. During crystallization and solidification of metals and alloys chemical non-homogeneities occur, i.e. chemical heterogeneities of individual elements, since the elements, both constitutive and tramp elements and admixtures, segregate. Parameter of back diffusion (the mass Fourier number) occurs in majority of the used micro-segregation models. The presented paper calculates parameters of back diffusion of determined elements (C, Si, Mn, P and S) in selected areas of cross-section of continuously cast steel billet. Calculations were made with use of our own experimental data, tabulated data and also outputs from heat model simulating temperature field of billet at solidification and cooling. On the basis of these results it is possible to formulate a hypothesis about influence of cooling rate on back diffusion of investigated elements at solidification of steel billet.
Czech abstract
Chemická heterogenita prvků je dominující příčinou vad odlitků a ocelových výrobků. Během krystalizace a tuhnutí kovů a slitin se vyskytuje chemická nehomogenita a segregace prvků. Parametr zpětné difuze ( Fourierovo kriterium pro přenos hmoty) se vyskytuje ve většině mikro-segregačních modelů. Příspěvek předkládá výpočet parametrů zpětné difuze prvků (C, Si, Mn, P a S) ve vybraných oblastech příčného řezu kontinuálně odlévaného ocelového sochoru. Bylo využito experimentální a tabelárních dat a výsledků numerického modelu teplotního pole. Je formulována hypotéza o vlivu rychlosti tuhnutí na zpětnou difuzi zkoumaných prvků.
English abstract
Chemical heterogeneity of elements is predominant cause of imperfections and defects of cast and formed steel products. During crystallization and solidification of metals and alloys chemical non-homogeneities occur, i.e. chemical heterogeneities of individual elements, since the elements, both constitutive and tramp elements and admixtures, segregate. Parameter of back diffusion (the mass Fourier number) occurs in majority of the used micro-segregation models. The presented paper calculates parameters of back diffusion of determined elements (C, Si, Mn, P and S) in selected areas of cross-section of continuously cast steel billet. Calculations were made with use of our own experimental data, tabulated data and also outputs from heat model simulating temperature field of billet at solidification and cooling. On the basis of these results it is possible to formulate a hypothesis about influence of cooling rate on back diffusion of investigated elements at solidification of steel billet.
Keywords in Czech
Kontilití, ocelový sochor, chemická heterogenita, teplotní pole, numerický model
Keywords in English
Concasting, steel billet, chemical heterogeneity, temperature field, numerical model
RIV year
2011
Released
01.09.2011
Location
Shanghai
ISSN
1708-5284
Volume
8
Number
P 279
Pages from–to
1–2
Pages count
2
BIBTEX
@article{BUT89872,
author="František {Kavička} and Jana {Dobrovská} and Věra {Dobrovská} and Hana {Francová},
title="Study of cooling rate effect on back-diffusion during solidification of continuously cast steel billet",
year="2011",
volume="8",
number="P 279",
month="September",
pages="1--2",
address="Shanghai",
issn="1708-5284"
}