拉速对薄板坯连铸过程中流场、温度场及溶质偏析的影响

李中原; 赵九洲

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拉速对薄板坯连铸过程中流场、温度场及溶质偏析的影响
Effects of Drawing Velocity on Turbulent Fluid Flow,Temperature Field and Solute Segregation in Continuous Casting Thin Slab
2006年第4期页码：193-196
纸质出版日期： 2006 ，
DOI：

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[1]李中原,赵九洲.拉速对薄板坯连铸过程中流场、温度场及溶质偏析的影响[J].特种铸造及有色合金,2006(04):193-196+189.

Li Zhongyuan 1, Zhao Jiuzhou1. Effects of Drawing Velocity on Turbulent Fluid Flow,Temperature Field and Solute Segregation in Continuous Casting Thin Slab[J]. Special Casting & Nonferrous Alloys, 2006,(4):193-196.
[1]李中原,赵九洲.拉速对薄板坯连铸过程中流场、温度场及溶质偏析的影响[J].特种铸造及有色合金,2006(04):193-196+189. DOI：

Li Zhongyuan 1, Zhao Jiuzhou1. Effects of Drawing Velocity on Turbulent Fluid Flow,Temperature Field and Solute Segregation in Continuous Casting Thin Slab[J]. Special Casting & Nonferrous Alloys, 2006,(4):193-196. DOI：

摘要

针对薄板坯连铸过程中的动量传输、热量传输及溶质传输过程

建立了一个三维三场耦合数学模型。模拟计算了薄板坯连铸过程中的紊流速度场、温度场及溶质场分布

计算分析了拉速变化对三场及凝固过程的影响。结果表明

提高拉速显著增强了铸坯内钢液的紊流流动

改变了温度场形状及溶质浓度的分布。提高拉速导致铸坯上表面钢液流速加快

增加了弯月面的波动

使得射流对窄壁的冲击力变大、凝固坯壳变薄

并有减小溶质偏析的趋势。

Abstract

A 3-D coupled model for turbulent fluid flow

heat transfer and solute transport has been established to analyze the effects of drawing velocity on turbulent fluid flow

temperature field and evolution of macrosegregation in continuous casting thin slab.The calculated results show that increasing in drawing velocity can dramatically improve the turbulent fluid flow of liquid steel and change the shape of the temperature field and distribution of solute concentration in the mould.Increase of the drawing velocity can accelerate the flow speed on the top surface of the liquid steel and result in the fluctuation on the meniscus

increasing the impacting energy of jet to narrow wall to thin the solidified skin

and decreasing macrosegregation of solute in the thin slab.