Modelling of continuous casting processes parameters on the shrinkage cavity formation in bearing steel blooms

IF 1.7 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Ironmaking & Steelmaking Pub Date : 2023-03-10 DOI:10.1080/03019233.2023.2175511
Baozhen Yang, Hui Zhang, Ming-lin Wang
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Abstract

ABSTRACT Based on the thermal-mechanical coupling model, the distance from the critical position of the shrinkage cavity formation of the two bearing steel blooms to the meniscus is 22 and 19.78 m, respectively, and the critical center solid fraction is 0.7145 and 0.7033, respectively. Furthermore, the effects of superheat and casting speed on the critical value of shrinkage cavity formation are discussed. The results show that the two factors have a great influence on the critical position of shrinkage cavity formation in the former, but basically do not affect the critical solid fraction of shrinkage cavity formation. Finally, the industrial heavy reduction tests in different reduction intervals were carried out, and the results show that when the initial reduction position of the heavy reduction process is set before the critical solid fraction, it can not only eliminate the central shrinkage cavity of the bloom, but also improve the central segregation.
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连铸工艺参数对轴承型钢缩孔形成的影响
基于热-力耦合模型,两种轴承钢华缩洞形成的临界位置距半月板的距离分别为22和19.78 m,中心固相临界分数分别为0.7145和0.7033。讨论了过热度和浇注速度对缩孔形成临界值的影响。结果表明,两者对前者缩孔形成的临界位置影响较大,但对缩孔形成的临界固相分数基本没有影响。最后,进行了不同还原间隔的工业重还原试验,结果表明,将重还原过程的初始还原位置设置在临界固相分数之前,不仅可以消除毛坯的中心缩孔,还可以改善中心偏析。
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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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