二次氧化过程IF钢中间包中夹杂物演变行为

doi:10.13228/j.boyuan.issn0449-749x.20190242

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Abstract In the current study,the composition of IF molten steel and the properties of inclusions at different time in tundish during the continuous casting process were systematically analyzed to reveal the effect of tundish reoxidation on cleanliness of IF steels. The evolution mechanism of inclusions during the reoxidation of IF steels was aslo predicted by thermodynamic calculation. It was found that the reoxidation during the casting process was mainly caused by the absorption of air,increasing the Al₂O₃ content in inclusions. One part of alumina inclusions are formed by homogeneous nucleation,which results in the formation of more small Al₂O₃ inclusions in steels. The other part is of alumina inclusions are formed by heterogeneous nucleation, which results in the formation of a pure Al₂O₃ layer on the surface of the original Al₂O₃ core,and increase the size of the inclusions.

Key words： inclusions IF steels tundish reoxidation

Received: 31 May 2019

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	Articles by authors
	ZHU Tan-hua
	ZHOU Qiu-yue
	REN Ying
	DUAN Hao-jian
	ZHANG Li-feng

Cite this article:

ZHU Tan-hua,ZHOU Qiu-yue,REN Ying等. Inclusion evolution in IF steel during tundish reoxidation[J]. Iron and Steel, 2020, 55(3): 35-39.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190242 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I3/35

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