Abstract
Entrapment of macro-inclusions under the shell surface would lead to the surface quality of final steel products, which is closely related to the formation of oscillation mark hooks during the initial shell solidification. In this study, the distribution of inclusions at different depths beneath the shell surface was analyzed by auto-SEM. Water simulations and particle image velocimetry (PIV) measurements were conducted to reveal the mechanism of inclusions captured by hooks. The results shown that the inclusions were maximizing at 1 mm depth from the slab surface. Three kinds of inclusion movements in hook region were found: being captured by the meniscus; being captured below the meniscus; and some of captured inclusions returned to liquid steel. Most of the inclusions were captured near the meniscus which might lead to the highest inclusion amount near the surface of slab. Additionally, the number of inclusions captured by hooks would be reduced with increasing the casting speed.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Basu S, Choudhary SK, Girase NU (2004) Nozzle clogging behaviour of Ti-bearing Al-killed ultra low carbon steel. ISIJ Int 44(10):1653–1660
Wang M, Bao Y, Zhao L et al (2015) Distribution and detriment of bubbles in continuous casting interstitial free steel slab. ISIJ Int 55(4):799–804
Lee GG et al (2009) Prediction and control of subsurface hooks in continuous cast ultra-low-carbon steel slabs. Ironmaking Steelmaking 36.1:39–49
Braun TB, Elliott JF, Flemings MC (1979) The clustering of alumina inclusions. Metall Mater Trans B 10(2):171–184
Kumar A, Choudhary SK, Ajmani SK (2012) Distribution of macroinclusions across slab thickness. ISIJ Int 52.12:2305–2307
Yu H et al (2015) Characteristics of subsurface inclusions in deep-drawing steel slabs at high casting speed. Metall Res Techno 112.6:608
Peixoto JJM, Gabriel WV, Ribeiro LQ, da Silva CA, da Silva IA, Seshadri V (2016) Computational and physical simulation of fluid flow inside a beam blank continuous casting mold. J Mater Process Techno 233:89–99
Wang M, Bao YP, Cui H et al (2011) Surface cleanliness evaluation in Ti stabilized ultralow carbon (Ti-IF) steel. Ironmaking Steelmaking 38(5):386–390
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 The Minerals, Metals & Materials Society
About this paper
Cite this paper
Xiao, P., Zhou, J., Zhu, L., Zhang, C., Liu, Y. (2018). Effect of Hook Formation During Initial Solidification on Distribution of Subsurface Inclusions in Ultralow Carbon Steel Slabs. In: Nastac, L., Pericleous, K., Sabau, A., Zhang, L., Thomas, B. (eds) CFD Modeling and Simulation in Materials Processing 2018. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72059-3_3
Download citation
DOI: https://doi.org/10.1007/978-3-319-72059-3_3
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-72058-6
Online ISBN: 978-3-319-72059-3
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)