电脉冲孕育处理对方坯连铸09CuPCrNi钢凝固组织的影响

Influence of EPM on the Solidification Structures of 09CuPCrNi Steel Billets

摘要: 在鞍钢工业生产中进行了利用电脉冲孕育技术改善和细化连铸坯凝固组织的探索性实验研究,实验钢种为09CuPCrNi,连铸坯的尺寸规格为150mm×150mm,实验结果表明,在连铸中间罐内对09CuPCrNi钢水进行电脉冲孕育处理可以明显细化连铸坯的凝固组织,与未经电脉冲孕育处理的连铸坯相比,经电脉冲孕育处理后,连铸坯的柱状晶长度明显缩短,一次枝晶臂间距明显减小;连铸坯的中心等轴晶区扩大,中心缩孔得到明显改善,轧材性能达到了技术要求。

Abstract: Industrial research for improving the solidification structures of billets with the Electric Pulse Modification (EPM) technology was carried out in Anshan Iron and Steel Group Company. The experimental steel is 09CuPCrNi. The billet size is 150 mm×150 mm. Experimental results show that the solidification structure of the billet was fined obviously by applying electric pulse on the molten steel in tundish. The length of columnar dendrite and the space of primary dendrite of the billet with EPM treatment is much smaller than that of the untreated billet. The zone of the equiaxed grain in the center of the billet is increased. The central shrinkage cavity was eliminated. The mechanical properties of the finished product satisfy the technical standards.