Distinct Mechanisms for Channel Segregation in Ultra-Heavy Advanced Steel Ingots via Numerical Simulation and Experimental Characterization

doi:10.1007/s11663-023-02873-7

IMR OpenIR

	Distinct Mechanisms for Channel Segregation in Ultra-Heavy Advanced Steel Ingots via Numerical Simulation and Experimental Characterization
	Cao, Yanfei 1; Liu, Hongwei 1; Fu, Paixian 1; Chen, Yun 1; Chen, Zhenzhen 1,2; Miao, Yangyang 1,2; Liu, Hanghang 1; Sun, Chen 1; Li, Dianzhong 1
通讯作者	Li, Dianzhong(dzli@imr.ac.cn)
	2023-08-14
发表期刊	METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
ISSN	1073-5615
页码	13
摘要	Channel segregation is one of the most common defects in solidifying steel, particularly in ultra-heavy advanced steel ingots, and it has a significant effect on the mechanical properties of the final products. However, the formation mechanism remains unclear. Here, based on numerical simulations and experimental characterization of 100-ton ultra-heavy 30Cr2Ni4MoV steel ingots used in nuclear power plants, it is strikingly found that channel segregations in the top riser and body are caused by two distinct mechanisms, natural convection and inclusion flotation, respectively. The flow instability and mush deformation in the riser originates from the complex geometry and heat transport. However, the onset of channel segregation in the ingot body stems from perturbation by inclusion flotation. Quantitatively, the initiation criterion of the modified Rayleigh number, including the inclusion effect and its critical value of 30, is proposed for the first time. In addition, it is proven that reducing the number of inclusions prevents channel segregation and improves the entire compositional homogeneity. This study highlights a novel idea by jointly controlling impurities and optimizing hot-top design to produce homogenized ultra-heavy steel ingots in key areas.
资助者	National Natural Science Foundation ; National Key Research and Development Program
DOI	10.1007/s11663-023-02873-7
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation[52031013] ; National Key Research and Development Program[2018YFA0702900] ; National Key Research and Development Program[TC190A4DA/35]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001048344400002
出版者	SPRINGER
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/178976
专题	中国科学院金属研究所
通讯作者	Li, Dianzhong
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Cao, Yanfei,Liu, Hongwei,Fu, Paixian,et al. Distinct Mechanisms for Channel Segregation in Ultra-Heavy Advanced Steel Ingots via Numerical Simulation and Experimental Characterization[J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,2023:13.
APA	Cao, Yanfei.,Liu, Hongwei.,Fu, Paixian.,Chen, Yun.,Chen, Zhenzhen.,...&Li, Dianzhong.(2023).Distinct Mechanisms for Channel Segregation in Ultra-Heavy Advanced Steel Ingots via Numerical Simulation and Experimental Characterization.METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,13.
MLA	Cao, Yanfei,et al."Distinct Mechanisms for Channel Segregation in Ultra-Heavy Advanced Steel Ingots via Numerical Simulation and Experimental Characterization".METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE (2023):13.