在板坯中碳的偏析同时存在负偏析区和中心正偏析。
In the slab, the negative carbon segregation region and positive segregation in the center are observed simultaneously.
结果表明，糊状区中由于热溶质双扩散对流造成的密度变化是形成A偏析的根本原因。
The results showed that the density variation induced by double-diffusive convection is significant to the formation and evolution of A-segregates.
结果表明，随着S含量的增加，导致固液两相区、温度范围和偏析程度明显加大，引起合金的热塑性降低。
The results showed that the solid liquid phase zone, temperature interval and segregation degree may be obviously enlarged with increasing s content so as to reduce the hot plasticity of the alloy.
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