MECHANISM FOR SEPARATING INCLUSIONS FROM MOLTEN STEEL STIRRED WITH A ROTATING ELECTROMAGNETIC-FIELD
MECHANISM FOR SEPARATING INCLUSIONS FROM MOLTEN STEEL STIRRED WITH A ROTATING ELECTROMAGNETIC-FIELD
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DOI：
10.2355/isijinternational.32.142
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发表时间：
1992-01-01
影响因子：
1.8
通讯作者：
FUJII, T
中科院分区：
文献类型：
--
作者：
MIKI, Y;KITAOKA, H;FUJII, T
为了阐明旋转电磁场强搅拌钢液分离夹杂物的机理，建立了旋转电磁场强搅拌钢液分离夹杂物的实验模型。所获得的锭在旋转轴处具有其最大氧含量。这一最大区域的存在可以部分地解释为在钢水旋转过程中作用于夹杂物的向心力。在钢锭中观察到许多双金属夹杂物对，形成双金属夹杂物对的夹杂物的半径集中在10 ~ 50 μ m的范围内。用Saffman模型解释了这一现象，该模型表明湍流涡流中夹杂物之间的梯度碰撞的可能性。这种夹杂物的凝聚效应表明电磁搅拌钢包中旋转钢液的高脱氧能力。
An experimental model was constructed to clarify the mechanism for separating inclusions from molten steel strongly stirred with a rotating electro-magnetic field.Molten steel was rotated and solidified in a crucible. The ingot obtained had its maximum oxygen content at the axis of rotation. The existence of this maximum area can be partly explained by the centripetal force acting on inclusions during rotation of the molten steel.Many coagulating inclusion pairs were observed in the ingot, with the radii of the inclusions forming coagulating pairs being concentrated in the range from 10 to 50-mu-m. This phenomenon was explained using Saffman's model, which shows the probability of gradient collision between inclusions in turbulent eddies This inclusion coagulation effect suggests the high deoxidation capability of rotating molten steel in an electro-magnetically stirred ladle.