Analysis of Mold Level Hunching by Unsteady Bulging during Thin Slab Casting

In order to analyze the phenomenon of mold level hunching (MLH) during thin slab casting process, the variation of the mold level and the bulging of strand were measured and analyzed using Fast Fourier Transform (FFT) spectrum analysis. Both of mold level hunching and bulging had the same frequency...

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Veröffentlicht in:ISIJ International 2002/10/15, Vol.42(10), pp.1103-1111
Hauptverfasser: Yoon, U-Sok, Bang, In-Wan, Rhee, J. H., Kim, Seong-Yeon, Lee, Joo-Dong, Oh, Kyu Hwan
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container_end_page 1111
container_issue 10
container_start_page 1103
container_title ISIJ International
container_volume 42
creator Yoon, U-Sok
Bang, In-Wan
Rhee, J. H.
Kim, Seong-Yeon
Lee, Joo-Dong
Oh, Kyu Hwan
description In order to analyze the phenomenon of mold level hunching (MLH) during thin slab casting process, the variation of the mold level and the bulging of strand were measured and analyzed using Fast Fourier Transform (FFT) spectrum analysis. Both of mold level hunching and bulging had the same frequency and the specific frequency corresponded to the main roll pitch of the thin slab caster. The unsteady bulging was found to be a main reason of mold level hunching. The unsteady bulging profile through the full range of the caster and the height of mold level hunching were calculated using a heat transfer model and a continuous beam model. The effects of process variables on mold level hunching and the process condition of reducing mold level hunching were studied. The amount of mold level hunching increased as unsteady bulging increased due to the hunching of casting speed. An aperiodic roll pitch between segments could be effective in reducing mold level hunching.
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subjects aperiodic roll pitch
Applied sciences
continuous beam model
Exact sciences and technology
FFT analysis
Gravity die casting and continuous casting
Iron and steel making
Metals. Metallurgy
mold level hunching (MLH)
Production of metals
thin slab casting
unsteady bulging
title Analysis of Mold Level Hunching by Unsteady Bulging during Thin Slab Casting
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