在凝固过程中,电磁搅拌所导致的熔体流动使钢的原始奥氏体晶粒得到了细化;但却粗化了二次枝晶臂间距,其结果。使抗拉强度提高,并使断面收缩率明显下降。微量Ce的加入能够抑制电磁搅拌的不利作用。
The melt flow induced by the electromagnetic stirring in the molten low sulphursteel may fine the original austenite grains, but widen the secondary dendritic arm spacings.As a result, the ultimate tensile strength of the steel will be improved and the reduction ofarea will be remarkably decreased. The microalloying by an addition of Ce may retard the un-favourable effect of the electromagnetic stirring.
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