Dynamic soft reduction for continuously cast rail bloom

被引：17

作者：

Chen, Yong ^{[1
]}

Li, Gui-Jun

Yang, Su-Bo

Zhu, Miao-Yong

机构：

[1] Northeastern Univ, Sch Met & Mat, Shenyang 110004, Liaoning, Peoples R China

[2] Panzhihau Iron & Steel Res Inst, Dept Mat Res, Panzhihua 617000, Sichuan, Peoples R China

[3] Panzhihua New Steel & Vanadium Co Ltd, Vanadium Recovery & Steelmaking Plant, Panzhihua 617062, Sichuan, Peoples R China

来源：

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL | 2007年 / 14卷 / 05期

关键词：

continuous bloom casting; dynamic soft reduction; rail steel; internal quality;

D O I：

10.1016/S1006-706X(07)60066-1

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

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.

引用

页码：13 / +

页数：6