Numerical Simulation of Macrosegregation in Continuous Casting Billet Based on Electric Furnace Smelting Waste Slag Steel

Yang Zhen; Song Yudan; Zhu Xiaolei; Liu Lang; Ai Xingang; Li Shengli

doi:10.20057/j.1003-8620.2025-00124

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Numerical Simulation of Macrosegregation in Continuous Casting Billet Based on Electric Furnace Smelting Waste Slag Steel

Smelting and Solidification | 更新时间：2026-03-03

- Numerical Simulation of Macrosegregation in Continuous Casting Billet Based on Electric Furnace Smelting Waste Slag Steel
- Special Steel Vol. 47, Issue 2, Pages: 64-70(2026)
- 作者机构：
  
  1.辽宁科技大学应用技术学院，辽宁鞍山 114051
  2.辽宁科技大学材料与冶金学院，辽宁鞍山 1140512
  3.中国航发贵州黎阳航空动力有限公司，贵阳 550014
- 作者简介：
- 基金信息：
- DOI：10.20057/j.1003-8620.2025-00124
  CLC： TG244
- Received：28 April 2025，
  
  Published：30 March 2026
- 稿件说明：
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杨振,宋毓旦,朱晓雷等.基于废渣钢冶炼的连铸小方坯宏观偏析缺陷数值模拟[J].特殊钢,2026,47(02):64-70.

Yang Zhen,Song Yudan,Zhu Xiaolei,et al.Numerical Simulation of Macrosegregation in Continuous Casting Billet Based on Electric Furnace Smelting Waste Slag Steel[J].Special Steel,2026,47(02):64-70.
杨振,宋毓旦,朱晓雷等.基于废渣钢冶炼的连铸小方坯宏观偏析缺陷数值模拟[J].特殊钢,2026,47(02):64-70. DOI： 10.20057/j.1003-8620.2025-00124.

Yang Zhen,Song Yudan,Zhu Xiaolei,et al.Numerical Simulation of Macrosegregation in Continuous Casting Billet Based on Electric Furnace Smelting Waste Slag Steel[J].Special Steel,2026,47(02):64-70. DOI： 10.20057/j.1003-8620.2025-00124.

摘要

为有效控制基于废渣钢冶炼的连铸小方坯宏观偏析缺

陷，建立了能够直接耦合连铸全流程熔体流动、微观组织演变与溶质传输等行为的多相凝固模型。以25MnSiV钢连铸小方坯（断面尺寸为160 mm × 220 mm）为例，随着浇铸过热度从45 K降低到15 K，连铸小方坯中心区域的等轴晶宽度由40 mm增加到46 mm，且连铸凝固末端铸坯心部碳偏析度从1.23降低到1.16；可见，为改善宏观偏析缺陷，基于废渣钢冶炼的连铸小方坯生产过程中依然应该尽可能地采用低过热度浇铸工艺。此外，如果在维持小方坯浇铸低过热度基础上，进一步采用凝固末端压下工艺，且压下区间能够覆盖凝固终点前的溶质富集区（

= 0.42~1.0），则可以更好地解决小方坯凝固末端的宏观偏析缺陷。

Abstract

To effectively improve the macrosegregation of continuous casting small square billets based on waste slag steel smelting， a multiphase solidification model that can directly couple the behaviors of the melt flow， microstructure evolution， and solute transport in the whole continuous casting process was established. Taking the continuous casting small square billet with a cross section of 160 mm × 220 mm for 25MnSiV as an example， when the superheat degree decreases from 45 K to 15 K， the width of equiaxed crystal in the center of continuous casting small square billet increases from 40 mm to 46 mm， and the carbon macrosegregation degree in the billet center at the end of solidification decreases from 1.23 to 1.16. Therefor，for improving the macrosegregation， the low superheat casting process should still be used as far as possible in the continuous casting small square billet production based on waste slag steel smelting. In addition， if the low superheat is maintained during the casting of small square billet，the mechanical reduction near solidification end could be further applied， and the reduction region could cover the solute enrichment zone （

= 0.42-1.0）， the macrosegregation defects at the solidification end of billets can be better improved.

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references

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