Dynamic Soft Reduction for Continuously Cast Rail Bloom

作     者：CHEN Yong LI Gui-jun YANG Su-bo ZHU Miao-yong 

作者机构：School of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China Department of Material Research Panzhihua Iron and Steel Research Institute Panzhihua 617000 Sichuan China Vanadium Recovery andSteelmaking Plant Panzhihua New Steel and Vanadium Co Ltd Panzhihua 617062 Sichuan China 

出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)

年 卷 期：2007年第14卷第5期

页      面：13-17,51页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：continuous bloom casting dynamic soft reduction rail steel internal quality 

摘      要：Center porosity and centerline segregation in continuously cast bloom can be minimized by the well-known method of dynamic soft reduction. Metallurgical results of soft reduction previously employed in continuous bloom casting for heavy rail steel in Panzhihua Iron and Steel Group were not fully achieved because of the improper soft reduction process. Therefore, experiments for optimizing the process parameters of soft reduction for bloom were carried out. The results show that the proportion of the center porosity, which is less than 1.0, increases from 28.41% to 99.81%, while the proportion of the centerline segregation class increases from 40.91% to 100%, and the proportion of the central cavity increases from 92.05% to 100%, whereas the center carbon segregation index decreases from 1.17 to 1.05. The internal quality and the mechanical performance of the rails produced from continuously cast blooms meet the requirement of high-speed tracks of 350 km/h.