321H不锈钢精炼和连铸过程中夹杂物的演化机制

IF 1.7 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Ironmaking & Steelmaking Pub Date : 2023-05-23 DOI:10.1080/03019233.2023.2214407

Zhuo Chen, Guangqiang Pu, Bo Cai, S. He, Weitong Du, Huaping Huang, Yuanqing Chen

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引用次数: 0

摘要

摘要以工业规模研究了321H不锈钢在精炼和铸造过程中夹杂物的演变，以阐明非金属夹杂物的数量和分布。分析表明，在AOD和VOD晚期，Al2O3和Al2O3分别是主要的夹杂物类型。LF晚期包裹体以纯氮化钛和以氧化物为核的氮化钛为主。结晶器和铸坯中的夹杂物类型与LF晚期相似，而铸坯中氮化钛夹杂物数量较多，尺寸较大。与其他氧化物包裹体相比，与MgO-Al2O3-CaO-（TiO2）核一起沉淀的氮化钛包裹体显示出更高的数量密度和面积分数。利用FactSage软件对钢液的钙处理进行了优化，在添加钛之前，有必要准确控制钢液中的钙含量。

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Evolution mechanism of inclusions during refining and continuous casting process of 321H stainless steel

ABSTRACT The evolution of inclusions during the refining and casting process was investigated on an industrial scale to clarify the quantity and distribution of non-metallic inclusions for 321H stainless steel. The analyses showed that Al2O3-SiO2-MnO-CaO and Al2O3 as the main types of inclusions at the late of AOD and VOD, respectively. Pure titanium nitride and titanium nitride with oxide as the nuclei dominated the inclusions at the late of LF. The types of inclusions in mold and slab were similar to those obtained at the late of LF, while titanium nitride inclusions in slab were higher in numbers and larger in size. The titanium nitride inclusions precipitating with MgO-Al2O3-CaO-(TiO2) nuclei showed a higher number density and area fraction than other oxide inclusions. The calcium treatment of molten steel was optimized by FactSage software and it was necessary to accurately control the calcium content in molten steel before titanium addition.

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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.