A Mathematical Model for Mitigating Centerline Macro Segregation in Continuous Casting Slab

Abstract

In the current paper, a mathematical model of heat transfer and solidification during slab continuous casting of steels was developed, which can be used for reducing centerline macro segregation in the steel slabs by simulating and improving the uniformity of cooling intensity in the transverse direction. the model features a detailed treatment of boundary conditions in both width direction and casting direction, including the effects of non-uniform distribution of spray water in the transverse direction, lower cooling efficiency on the outer radius surface, different kinds of spray nozzles used, varied cooling styles at different locations, and the gap in the casting mold, with which the model can predict the 3-D shape of slab solid shell. the predictions indicate that, distribution of cooling intensity in the transverse direction greatly affects the shape of the liquid-core at the solidification end; due to the unsuitable cooling system, the transverse temperature distribution is non-uniform, and the solidification end is irregular and much longer, which is bad for the application of dynamic soft reduction technology and would lead to serious partial centerline macro segregation and crack in the slab. the nozzle collocation of the caster was optimized according to the study, which results in better steel quality in centerline macro segregation.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Centerline macro segregation; Dynamic soft reduction; Heat transfer mathematical model; Shape of solid shell; Slab continuous casting

International Standard Serial Number (ISSN)

1582-2214

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 The Romanian Metallurigal Foundation, All rights reserved.

Publication Date

15 Aug 2011

This document is currently not available here.

Share

 
COinS