公开(公告)号：US06557623B2

公开(公告)日：2003-05-06

申请号：US09959858

申请日：2001-11-09

申请人： Hiromitu Shibata ,  Yasuo Kishimoto ,  Shuji Takeuchi ,  Koji Yamaguchi

发明人： Hiromitu Shibata ,  Yasuo Kishimoto ,  Shuji Takeuchi ,  Koji Yamaguchi

IPC分类号： B22D11108

CPC分类号： B22D11/115 ,  B22D11/10 ,  B22D41/50

摘要： Molten steel is poured using an immersion nozzle and a direct current magnetic field zone is applied to a cast slab over the entire width in the thickness direction thereof at a predetermined distance below the molten metal level in a continuously-casting mold. The immersion nozzle is provided with ejection holes located in at least upper and lower stages, at least one lower ejection hole is disposed such that these satisfy the following formula (1). The supply rate of molten steel from the upper ejection holes is set smaller than the rate consumed by solidification in an upper pool, and a particular solute element is added to the molten steel in the upper pool. 0

摘要翻译： 使用浸渍喷嘴浇注熔融钢，并且在连续铸造模具中，在熔融金属水平以下预定距离处，在铸坯的厚度方向的整个宽度上施加直流磁场区。 浸入式喷嘴设置有位于至少上部和下部的喷射孔，至少一个下部喷射孔被设置为使得它们满足下列公式（1）。 来自上喷射孔的钢水的供给速度设定为小于上池中固化所消耗的速度，并且特定的溶质元素被添加到上池中的钢水中。其中，θ：下喷射的向下角 孔（°）; w：模具宽度方向的长度（m）; andh：从下喷孔中心到磁极高度中心的距离（m）。