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Indexed by:期刊论文

Date of Publication:2012-09-01

Journal:JOURNAL OF MATERIALS PROCESSING TECHNOLOGY

Included Journals:EI、SCIE、Scopus

Volume:212

Issue:9

Page Number:1811-1818

ISSN No.:0924-0136

Key Words:Slab continuous casting; Mold; On-line measurement; Transient heat transfer; Inverse problem; Non-uniformity

Abstract:In this present paper, a two-dimensional (2D) transient finite-difference model was developed. By solving appropriate inverse problem from the measured temperatures by thermocouples buried at various locations in the mold wall, the unknown heat flux between the strand and mold was identified. The temperature calculated in present model agreed well with actual plant data, and the results gave obvious non-uniform characteristics of heat flux and shell thickness, which could better reflect the real casting conditions of strand. The influence of casting speed on average heat flux and shell thickness at the mold outlet was calculated as follows: increase of casting speed caused increase of average heat flux and decrease of solidified shell thickness at the mold outlet. Furthermore, the relationship between average longitudinal heat flux and shell thickness of mold outlet was discussed, and it resulted in that the heat transfer from the strand to the mold remarkably determined the thickness and non-uniformity of the solidified shell. (C) 2012 Elsevier B.V. All rights reserved.