汽车外板连铸结晶器流场与SEN出口形状优化

炼钢

汽车外板连铸结晶器流场与SEN出口形状优化

蒋鹏1，何文远2，乔焕山2，赵长亮2，张涛1，杨健1

（1.上海大学材料科学与工程学院省部共建高品质特殊钢冶金与制备国家重点实验室，上海 200444； 2.首钢京唐钢铁联合有限责任公司，河北唐山 063200）

接受日期:1900-01-01 出版日期:2020-02-05

Optimization of mold flow field and SEN port shape in continuous casting of automobile exposed panel

Accepted:1900-01-01 Online:2020-02-05

摘要/Abstract

摘要： 采用测速棒偏转法对工业生产连铸结晶器表面流速进行了高温实际测量，并依据测量结果对数学模型的计算结果进行了对比分析与验证。并进一步利用数学模型对比分析了侧孔出口为方形、矩形和跑道形的浸入式水口（Submerged Entry Nozzle，SEN）在不同拉速和水口浸入深度情况下结晶器内流场的变化规律。结果表明，采用三种不同类型水口的表面流速随着拉速的增大而增加，随着SEN浸入深度的增大而减小。在相同的连铸工艺条件下，采用方形水口的结晶器表面流速大于采用矩形水口和跑道形水口的表面流速。采用矩形水口的结晶器表面流速与采用跑道形水口的表面流速大小相当。采用三种不同类型水口的液面湍动能随着拉速的增大而增加，随着水口浸入深度的增大而减小。在相同的连铸工艺条件下，采用跑道形水口的液面湍动能最小。

关键词: 结晶器, 流场, 湍动能, 表面流速, 汽车外板

Abstract: In this paper, the velocimetric rod deflection method was used to measure the velocities near the mold surface, and the calculated results from mathematical model were compared and verified by the measured results. The flow fields in the mold with square nozzle, rectangular nozzle and runway-shape nozzle at different casting speeds and nozzle submerged depths were analyzed by the mathematical model. The results show that with three different submerged entry nozzles(SEN), the velocities near the mold surface increase as the casting speeds are increased, and decrease as the SEN submerged depths are increased. Under the same continuous casting process parameters, the velocities of the mold surface with the square nozzle is greater than those with the rectangular nozzle and the runway-shape nozzle.The velocities near the mold surface with the rectangle nozzle is comparable to those with the runway-shape nozzle. With three different submerged entry nozzles, the surface turbulent kinetic energy increase as the casting speeds are increased, and decrease as the SEN submerged depths are increased. Under the same continuous casting process parameters, the surface turbulent kinetic energy with the runway-shaped nozzle is minimal.

Key words: mold, fluid flow, turbulent kinetic energy, surface velocity, automobile exposed panel

蒋鹏1，何文远2，乔焕山2，赵长亮2，张涛1，杨健1. 汽车外板连铸结晶器流场与SEN出口形状优化[J]. 炼钢.

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