Formation of hot-top segregation in steel ingot and effect of steel compositions
Formation of hot-top segregation in steel ingot and effect of steel compositions
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DOI：
10.1007/bf02655930
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发表时间：
1989-10
期刊：
影响因子：
--
通讯作者：
Jie Wanqi;Z. Yaohe
中科院分区：
文献类型：
--
作者：
Jie Wanqi;Z. Yaohe
Convection and composition variations in the liquid zone during solidification of H2O-NH4C1 solution, which has the same model of convection as that of steel ingot, are studied. It is shown that a weak convection region forms near the ingot top in the liquid zone at a certain stage of solidification and then develops downward gradually, and the negative segregation is detected in the weak convection region. This interesting phenomenon reveals the formation process of hot-top segregation in steel ingots. The parameterdpL/dfL, an important factor affecting the formation of hot-top segregation, is established as a function of the steel composition. When dpL/dfLis decreased by changing the steel composition, hot-top segregation will be impeded.
