金属学报  2011, Vol. 47 Issue (6): 671-677    DOI: 10.3724/SP.J.1037.2010.00663

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板坯连铸结晶器内钢凝固过程热行为研究 I. 数学模型

蔡兆镇,朱苗勇

东北大学材料与冶金学院, 沈阳 110004

SIMULATION OF THERMAL BEHAVIOR DURING STEEL SOLIDIFICATION IN SLAB CONTINUOUS CASTING MOLD I. Mathematical Model

CAI Zhaozhen, ZHU Miaoyong

School of Materials and Metallurgy, Northeastern University, Shenyang 110004

蔡兆镇 朱苗勇. 板坯连铸结晶器内钢凝固过程热行为研究 I. 数学模型[J]. 金属学报, 2011, 47(6): 671-677.
, . SIMULATION OF THERMAL BEHAVIOR DURING STEEL SOLIDIFICATION IN SLAB CONTINUOUS CASTING MOLD I. Mathematical Model[J]. Acta Metall Sin, 2011, 47(6): 671-677.

摘要 参考文献 相关文章 Metrics 全文: PDF(2637 KB)   摘要: 建立了伴随δ/γ相变的钢凝固过程两相区溶质微观偏析模型,以其所确立的钢凝固过程各相分数与温度之间的关系获得钢的高温物性参数,并根据连铸坯在结晶器内凝固收缩量与结晶器内表面的位移关系、保护渣的液/固状态及厚度分布、铸坯表面和铜板热面的温度分布以及气隙的动态变化等建立了描述坯壳--铜板界面热流的数学模型. 在此基础上, 运用率相关本构模型,采用顺序耦合法建立了描述板坯连铸结晶器内钢凝固过程热行为的二维瞬态热/力耦合有限元分析模型. 关键词 ： 板坯连铸,  结晶器,  保护渣,   δ/γ相变, 热行为     Abstract：Thermal behavior of the solidifying shell in continuous casting mold is very important to final steel products. In the present work, one two–dimension transient thermal–mechanical coupling finite element model was developed to simulate the thermal behavior of steel solidifying in slab continuous casting mold by using the sequential coupling method. In this model, in order to get the physical properties of steel at high temperature, a microsegregation model which would give the relationship of phase fractions and temperature for acquiring the physical properties with δ/γ  transformation in mushy zone was established. And the heat flux was obtained according to the displacement between the surface of solidifying shell and the hot face of mold as solidification contraction, the liquid/solid structure and distribution of mold flux, the temperature distribution of slab surface and mold hot face, and air gap distribution. In addition, the rate–dependent elastic–viscoplastic constitutive equation was applied to account for the evolution of shell stress in the mold. Key words： slab continuous casting    mold    mold flux     δ/γ  transformation    thermal behavior 收稿日期: 2010-12-09      基金资助: 国家杰出青年科学基金项目50925415和教育部基本科研业务费项目N100102001资助 作者简介: 蔡兆镇, 男, 1982年生, 博士生 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 蔡兆镇 朱苗勇 44.8K 链接本文: https://www.ams.org.cn/CN/10.3724/SP.J.1037.2010.00663      或      https://www.ams.org.cn/CN/Y2011/V47/I6/671 [1] Jing D J, Cai K K. Acta Metall Sin, 2000; 36: 403 (荆德君, 蔡开科. 金属学报, 2000; 36: 403) [2] Jing D J, Cai K K. 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