The Thermal Distortion of a Funnel Mold |
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Authors: | Lance C Hibbeler Brian G Thomas Ronald C Schimmel Gert Abbel |
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Affiliation: | 1. Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61802, USA 2. Strip Mainland Europe DSP, Tata Steel, 1970 CA, IJmuiden, The Netherlands 3. Research, Development, and Technology, Tata Steel, 1970 CA, IJmuiden, The Netherlands
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Abstract: | This article investigates the thermal distortion of a funnel mold for continuous casting of thin slabs and explores the implications on taper and solidification of the steel shell. The three-dimensional mold temperatures are calculated using shell-mold heat flux and cooling water profiles that were calibrated with plant measurements. The thermal stresses and distorted shape of the mold are calculated with a detailed finite-element model of a symmetric fourth of the entire mold and waterbox assembly, and they are validated with plant thermocouple data and measurements of the wear of the narrow-face copper mold plates. The narrow-face mold distorts into the typical parabolic arc, and the wide face distorts into a ??W?? shape owing to the large variation in bolt stiffnesses. The thermal expansion of the wide face works against the applied narrow-face taper and funnel effects, so the effect of thermal distortion must be considered to accurately predict the ideal mold taper. |
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