Reduction in macrosegregation on 380 mm×490 mm bloom caster equipped combination M+F-EMS by optimising casting speed

IF 2.2 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Ironmaking & Steelmaking Pub Date : 2015-07-01 DOI:10.1179/1743281214Y.0000000247

H. Sun, L. Li, X. Cheng, W. Qiu, Z. Liu, L. Zeng

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引用次数: 25

Abstract

Abstract Based on the plant trials and the developed coupled mathematical model of electromagnetism, turbulent fluid flow, heat and solute transport, the effect of F-EMS position on the degree of bloom macrosegregation cast with combination stirring (M+F-EMS) has been evaluated and compared for medium carbon steel, 40Cr, and high carbon steel, GCr15. The optimum F-EMS position is mainly related to the solidification characteristic of the molten steel in the liquid pool that depends on the average natural convection velocity and solidification time during the final solidification stage. For a given steel grade and a given F-EMS position, the trend of centre porosity and shrinkage cavity variations is to first decrease and then increase with increasing casting speed. The optimal solidification ratio at the F-EMS centre is increased as the carbon content increases due to the increasing solidification time, where the optimal solidification ratios for GCr15 and 40Cr are 72 and 68% respectively.

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通过优化铸造速度，减少了380 mm×490 mm M+F-EMS组合坯连铸机的宏观偏析

摘要基于现场试验和建立的电磁、湍流流动、热和溶质输运耦合数学模型，评价并比较了F-EMS位置对中碳钢40Cr和高碳钢GCr15组合搅拌(M+F-EMS)铸坯宏观偏析度的影响。F-EMS的最佳位置主要与液池中钢液的凝固特性有关，这取决于最终凝固阶段的平均自然对流速度和凝固时间。对于给定钢种和给定的F-EMS位置，随着浇注速度的增加，中心孔隙率和缩孔率的变化趋势是先减小后增大。随着凝固时间的延长，碳含量的增加，F-EMS中心的最佳凝固比也随之增加，其中GCr15和40Cr的最佳凝固比分别为72%和68%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ironmaking & Steelmaking 工程技术-冶金工程

CiteScore

3.70

自引率

9.50%

发文量

125

审稿时长

2.9 months

期刊介绍： Ironmaking & Steelmaking: Processes, Products and Applications monitors international technological advances in the industry with a strong element of engineering and product related material. First class refereed papers from the international iron and steel community cover all stages of the process, from ironmaking and its attendant technologies, through casting and steelmaking, to rolling, forming and delivery of the product, including monitoring, quality assurance and environmental issues. The journal also carries research profiles, features on technological and industry developments and expert reviews on major conferences.