连铸结晶器内钢液流动、凝固和夹杂物的分布

钢铁, 2010, 45(5): 24-29.

连铸结晶器内钢液流动、凝固和夹杂物的分布

雷洪 ^1, , 张红伟 ^2, , 陈芝会 ^3, , 王恩刚 ^4, , 赫冀成 ^5,

1.东北大学材料电磁过程研究教育部重点实验室,辽宁,沈阳,110004

2.东北大学材料电磁过程研究教育部重点实验室,辽宁,沈阳,110004

3.东北大学材料电磁过程研究教育部重点实验室,辽宁,沈阳,110004

4.东北大学材料电磁过程研究教育部重点实验室,辽宁,沈阳,110004

5.东北大学材料电磁过程研究教育部重点实验室,辽宁,沈阳,110004

基金项目: 辽宁省科学技术计划项目(2009221007) 上海宝钢集团公司联合资助项目(50834010) 教育部留学回国人员科研启动基金(20071108-2) 高等学校学科创新引智计划(B07015) 国家自然科学基金国家高技术研究发展计划(2009AA03Z530) 教育部科学技术研究重点项目(108036) 辽宁省自然科学基金(20072033)

关键词：湍流 , 凝固 , 溶质输运 , 夹杂物 , 连铸结晶器

Fluid Flow, Solidification and Inclusion Distribution in a Continuous Casting Mold

建立并求解动量、热量和质量传输耦合模型,研究了连铸结品器内钢液流动、传热、凝固、溶质输运和夹杂碰撞长大行为.数值结果表明连铸机内钢液温度、碳质量分数和夹杂物体积分数的空间分布与钢水流动特征相似,也可分为上下2个循环区.但是其分布具有各自的特点.在涡心处,钢液温度较低,碳质量分数较高,夹杂物体积分数和数量密度较低.在弯月面处,钢液温度较低,碳质量分数较高,夹杂物的体积分数和数量密度较低.在结晶器出口处的凝固坯壳内,夹杂物的体积分数和数量密度分布极不均匀,存在阶跃现象,这与冲击点处凝固坯壳的重熔有关.

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