连铸坯点状偏析缺陷研究进展

doi:10.13228/j.boyuan.issn0449-749x.20190219

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Abstract More attention from companies and researchers has been paid to the solidification structure and the spot segregation in steel continuous casting, as the demands of high-end users on homogeneity are gradually increasing. Spot segregation, a semi-macroscopic defect of solute inhomogeneity in continuous casting of pipeline steel, gear steel, spring steel, bearing steel, etc, is speckle shape in transverse section and V shape in longitudinal section. It is difficult to remove thoroughly in the following process by diffusion. Spot segregation takes a significant effect on the service property of steel products. The agreement on the formation mechanism of spot segregation during steel continuous casting was totally obtained, however, there is still a difficulty in technology to eliminate it under the present condition. Based on the research achievements in the author′s team and the results in reported literatures, this review illustrated the definition, characteristics, detriment, influencing factors, formation mechanism and control measures of spot segregation. It is expected that it can provide some enlightenments and references for other researchers.

Key words： spot segregation solidification structure formation mechanism control measure continuously cast semi-product

Received: 20 May 2019

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	LAN Peng
	TIE Zhan-peng
	ZHANG Wei
	MIAO Hong-sheng
	YAN Qing-zhong
	ZHANG Jia-quan

Cite this article:

LAN Peng,TIE Zhan-peng,ZHANG Wei等. Research progress on spot segregation defects in continuously cast semi-products[J]. Iron and Steel, 2020, 55(2): 11-22.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190219 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I2/11

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