Effect of Sulfur Content on the Inclusion and Mechanical Properties in Ce-Mg Treated Resulfurized SCr420H Steel

doi:10.3390/met12010136

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	Effect of Sulfur Content on the Inclusion and Mechanical Properties in Ce-Mg Treated Resulfurized SCr420H Steel
	Sun, Meng 4; Jiang, Zhouhua 2,4; Li, Yang 4; Chen, Changyong 1; Ma, Shuai 4; Ji, Yongshuai 4; Wang, Ju 4; Liu, Hang 3
刊名	METALS
	2022
卷号	12 期号:1 页码:16
关键词	MnS inclusion cerium sulfur fracture
DOI	10.3390/met12010136
通讯作者	Jiang, Zhouhua(jiangzh@smm.neu.edu.cn) ; Li, Yang(liy@smm.neu.edu.cn)
英文摘要	To clarify the effect of sulfur on inclusions and mechanical properties of Ce-Mg treated resulfurized SCr420H steel. Laboratory experiments were conducted to prepare steels with sulfur contents as 0.01%, 0.06%, and 0.132%. Inclusion evolution in liquid steel, MnS precipitation during solidification, and tensile test results of steel after quenching and tempering were investigated. The results showed that due to the limitation of mass transfer in molten steel, composite inclusion that Ce-O-S wrapped by Ce-Ca-Mg-Al-Si-O, which was named transition state inclusions, can form quickly after adding Ce-Mg lump to the molten steel. As the homogenization of molten steel, the difference of sulfur content in steel can lead to the transition state inclusions transformed into different inclusions. With the increase of sulfur content, the quantity of MnS increased significantly, and the morphology of MnS transformed from "stick" to "dendritic + fishbone", and then to "fishbone". Tensile test results and fracture analysis indicate that the decline of inclusion spacing as the increase of sulfur content leads to a shorter physical path of crack propagation in steel. Therefore, the increase of sulfur content can bring about a decrease in the strength and plasticity of the steel. From the perspective of inclusion control, making the MnS inclusion precipitate more dispersive and increasing the distance between inclusions can be considered as a method for preventing the decline of mechanical properties in steel with high sulfur content.
资助项目	National Natural Science Foundation of China[52074075] ; National Key Research and Development Program of China[2016YFB0300105]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	MDPI
WOS记录号	WOS:000747667700001
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173589]
专题	金属研究所_中国科学院金属研究所
通讯作者	Jiang, Zhouhua; Li, Yang
作者单位	1.Wuhan Univ Sci & Technol, Sch Met & Mat, Wuhan 430081, Peoples R China 2.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 4.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Sun, Meng,Jiang, Zhouhua,Li, Yang,et al. Effect of Sulfur Content on the Inclusion and Mechanical Properties in Ce-Mg Treated Resulfurized SCr420H Steel[J]. METALS,2022,12(1):16.
APA	Sun, Meng.,Jiang, Zhouhua.,Li, Yang.,Chen, Changyong.,Ma, Shuai.,...&Liu, Hang.(2022).Effect of Sulfur Content on the Inclusion and Mechanical Properties in Ce-Mg Treated Resulfurized SCr420H Steel.METALS,12(1),16.
MLA	Sun, Meng,et al."Effect of Sulfur Content on the Inclusion and Mechanical Properties in Ce-Mg Treated Resulfurized SCr420H Steel".METALS 12.1(2022):16.