Effect of Ce on the Microstructure, High-Temperature Tensile Properties, and Fracture Mode of Strip Casting Non-Oriented 6.5%Si Electrical Steel

doi:10.11900/0412.1961.2021.00115

IMR OpenIR

	Effect of Ce on the Microstructure, High-Temperature Tensile Properties, and Fracture Mode of Strip Casting Non-Oriented 6.5%Si Electrical Steel
	Li Min 1,2; Li Haoze 1; Wang Jijie 2; Ma Yingche 1; Liu Kui 1
通讯作者	Li Haoze(lihz@imr.ac.cn)
	2022-05-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	58 期号:5 页码:637-648
摘要	Non-oriented 6.5%Si electrical steel exhibits excellent high-frequency magnetic properties, such as low iron loss and near-zero magnetostriction. Moreover, the high Si content causes poor deformability due to the solution strengthening effect of Si and the resulting ordering transformations, delaying the commercial application. Strip casting is a near-net forming technology that directly produces thin strips from the melt and reduces the required rolling deformation for the fabrication of thin sheets. This technology could be a viable option for industrializing the production of non-oriented 6.5%Si electrical steel. Despite this, even in the strip casting process, this brittle material is prone to edge cracks. Thus, improving the intrinsic plasticity of strip casting non-oriented 6.5%Si electrical steel is necessary through chemical modification to eliminate the deforming defects. The effect of Ce on the ordered phase of the solidification microstructure, high-temperature tensile properties, and fracture mode of strip casting non-oriented 6.5%Si electrical steel was investigated in this work. The results showed that the addition of Ce introduced high-melting Ce2O2.5S and Ce4O4S3 during strip casting, which promoted heterogeneous nucleation and refined the solidification microstructure of the as-cast strip. The presence of Ce did not affect the ordering condition of the as-cast strip. In decreasing order, the tensile temperatures corresponding to the ordered degree of the as-cast strip were 650, 400, and 800 degrees C. With the tensile temperature increasing, the yield and tensile strengths of the as-cast strip decreased, whereas the elongation gradually increased. When the tensile temperature exceeded 500 degrees C, the purification and microstructure refining effects of Ce improved grain-boundary cohesion and prevented intergranular cracking. Moreover, the occurrences of dynamic recovery and recrystallization eventually made the as-cast strip doped with Ce fractured by dimples, leading to a considerably enhanced tensile ductility. According to the findings, the rare-earth treatment should be considered as an effective method for increasing the ductility of strip casting non oriented 6.5%Si electrical steel.
关键词	non-oriented 6.5%Si electrical steel strip casting rare earth ductility fracture morphology
资助者	National Natural Science Foundation of China
DOI	10.11900/0412.1961.2021.00115
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51801221]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000787207700005
出版者	SCIENCE PRESS
引用统计	被引频次：4[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/321006/172669
专题	中国科学院金属研究所
通讯作者	Li Haoze
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Shenyang Areospace Univ, Coll Mat Sci & Engn, Shenyang 110136, Peoples R China
推荐引用方式 GB/T 7714	Li Min,Li Haoze,Wang Jijie,et al. Effect of Ce on the Microstructure, High-Temperature Tensile Properties, and Fracture Mode of Strip Casting Non-Oriented 6.5%Si Electrical Steel[J]. ACTA METALLURGICA SINICA,2022,58(5):637-648.
APA	Li Min,Li Haoze,Wang Jijie,Ma Yingche,&Liu Kui.(2022).Effect of Ce on the Microstructure, High-Temperature Tensile Properties, and Fracture Mode of Strip Casting Non-Oriented 6.5%Si Electrical Steel.ACTA METALLURGICA SINICA,58(5),637-648.
MLA	Li Min,et al."Effect of Ce on the Microstructure, High-Temperature Tensile Properties, and Fracture Mode of Strip Casting Non-Oriented 6.5%Si Electrical Steel".ACTA METALLURGICA SINICA 58.5(2022):637-648.