低共晶钢板纵向裂纹的形成与控制

IF 1.7 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Ironmaking & Steelmaking Pub Date : 2022-10-10 DOI:10.1080/03019233.2022.2112492
Xin Li, Yang Liu, Hucheng Zhang, Di Guobiao, C. Ji, Haibo Li, Jingang Liu, Mengyun Zhang
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引用次数: 0

摘要

摘要热输送和充电技术可以显著降低能源消耗、碳排放和产品生产周期。无缺陷板坯是实现这一技术的前提。在此,详细描述了纵向裂纹的形态特征。考虑合金元素的影响,分析了实际的相变过程和凝固收缩行为。由于浸入式喷嘴结构的不合理,弯月面周围的垂直传热并不理想。当不能用足够的液态炉渣填充间隙时,在固化壳和模具板之间容易形成气隙。气隙增大了不均匀凝固和应力集中对裂纹形成的影响。一种结构合理的新型SEN可以显著提高液态渣层厚度和凝固均匀性,降低钢的裂纹敏感性。
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Formation and control of longitudinal cracks in hypoperitectic steel slabs
ABSTRACT Hot delivery and charging techniques can significantly reduce energy consumption, carbon emissions, and the production cycle of products. The defect-free slab is the precondition of this techniques. Herein, the morphological characteristics of the longitudinal cracks were described in detail. The actual phase transition process and solidification shrinkage behavior were analyzed considering the effect of alloy elements. Due to the unreasonable submerged entry nozzle (SEN) structure, the vertical heat transfer is not optimal around the meniscus. When the gap cannot be filled with sufficient liquid slag, an air gap is easily formed between the solidified shell and the mould plates. The effect of uneven solidification and stress concentration on the crack formation will be enlarged by the air gap. A novel SEN with a reasonable structure can significantly improve the thickness of the liquid slag layer and solidification uniformity, and decrease the crack sensitivity of the steel.
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来源期刊
Ironmaking & Steelmaking
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.
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