连铸轻压下过程的热力分析  

Thermodynamic Analysis of Soft Reduction Process of Continuous Casting

作　　者：果晶晶[1] 陈健[2] Guo Jingjing;Chen Jian(Xingtai Polytechnic College,Xingtai Hebei 054035;Sinosteel Xingtai Machinery&Mill Roll Co.,Ltd.,Xingtai Hebei 054025)

机构地区：[1]邢台职业技术学院资源与环境工程系,河北邢台054035 [2]中钢集团邢台机械轧辊有限公司,河北邢台054025

出　　处：《山西冶金》2021年第2期28-30,共3页Shanxi Metallurgy

摘　　要：以D32船板钢250 mm×2400 mm连铸坯为研究对象,借助ANSYS数值模拟软件建立铸坯在轻压下过程中的热力耦合模型,模拟分析了在轻压下过程中铸坯的变形特点和应力分布规律,为深入解决轻压下过程中铸坯芯部未完全凝固区的温度、相变、收缩等状态较强的指导意义。研究表明,二冷第9段至第11段辊缝逐渐收缩,铸坯厚度方向累积压下量逐渐增大,达到压下的目的;夹辊辊缝的持续缩小,使得铸坯芯部未凝固区被持续挤压减小,铸坯内部未凝固(液芯)部分主要来承担压下辊对铸坯所实施的作用;在轻压下实施过程中铸坯横断面各位置等效应力大小分布为角部>宽面>窄面。Taking D32 ship plate steel 250 mm×2400 mm continuous casting slab as the research object, with the help of ANSYS numerical simulation, the thermo-mechanical coupling mathematical model of the light reduction process of the slab was established, and the deformation characteristics and stress of the slab during the soft reduction process were studied and analyzed. The distribution law has a strong guiding significance for the in-depth solution of the temperature, phase transition, and shrinkage of the incomplete solidification zone of the core of the slab during the soft reduction process. Research showed that the roll gap of the 9 th to 11 th stage of the secondary cooling gradually shrinked, and the cumulative reduction in the thickness direction of the cast slab gradually increased to achieve the purpose of reduction;the continuous reduction of the nip roll gap made the core of the slab unsolidified. The zone was continuously squeezed and reduced. The compression of the slab by the reduction roller was mainly borne by the unsolidified(liquid core) part of the slab;the equivalent stress distribution at each position of slab cross section during soft reduction process was the corner >wide face>narrow ace.

关 键 词：连铸坯 轻压下 应力/形变 数值模拟 

分 类 号：TG249.7[金属学及工艺—铸造]