攀钢2号方坯连铸45号钢动态轻压下工艺参数设计与应用

介绍了攀钢2号大方坯铸机45号钢动态轻压下模型参数设计基本思路。通过使用射钉、传热模型等研究方法,确定了45号钢的压下区间、压下总量等关键参数。45号钢生产实践表明:轻压下实施后,铸坯中心疏松评级小于等于0.5级的比例由之前的88.48%提高到100%,铸坯中心无缩孔比例由79.72%提高到98.74%,铸坯横断面碳偏析指数由0.88~1.11改善为0.92~1.06,45号钢内部质量显著改善。

Design and Application of Technic Parameters for Dynamic Soft Reduction Model of Steel No.45 for No.2 Bloom-Caster

This article introduced basic design ideas about dynamic soft reduction model parameters of steel No. 45 for No. 2 Bloom-Caster of Pansteel. It determined soft reduction range, total soft reduction and other key parameters of steel No. 45 by using pin-shooting and heat-transfer model and other research methods. Steel No. 45 production practice shows that after implementation of dynamic soft reduction, ratio of central porosity ≤ 0.5 grade increased from 88.48% to 100%, central bloom without shrinkage ratio increased from 79.72% to 98.74%, segregation index of carbon at transect of bloom improved from 0.88-1.11 to 0. 92-1. 06 , and the internal quality of steel No. 45 improved significantly.