脉冲电场处理对钢的凝固组织和元素分布的影响

Effect of pulse electric field on the solidification microstructure and element distribution of carbon steel

通过改变脉冲电场的电压对钢液进行处理,研究了脉冲电场处理对钢液凝固元素迁移特性和晶粒细化的影响.利用ImageJ软件统计分析了试样的晶粒数和晶粒分布,利用原位分析仪分析了钢中主要元素C、Si、Mn、P和S的分布与偏析情况,探讨了不同电压下脉冲电场对钢液凝固过程元素迁移特性的影响.实验结果表明,随着脉冲处理电压升高,晶粒明显得到细化,钢中元素Si、Mn和P具有相似的分布,而P和S具有相反的分布特性.

Molten steel was treated through changing the voltage of pulse electric field, the effect of pulse electric field on the refinement of crystal particles and the transfer of elements in solidification process was investigated. The number and distribution of crystal particles in steel was analyzed using the software ImageJ. The distribution and segregation of main elements in the solidification structure of steel were studied by original position analysis （OPA）, and the effect of the voltage of pulse electric field on the transfer of elements in solidification process was discussed. The results showed that the crystal particles were obviously refined with increasing pulse voltage, and there was a similar distribution characteristic for the elements Si, Mn and P but reverse for the elements P and S.