高等级汽车板中间包冶金技术

doi:10.13228/j.boyuan.issn1005-4006.20210077

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Abstract High-grade automobile sheet has a higher proportion of inclusion defects during the subsequent rolling or stamping process. In order to further improve the metallurgical effect of the tundish, the influence of the perforated dam of the tundish on the removal of inclusions during the normal casting process was studied. In order to ensure the consistency of the cleanliness of molten steel, a dam without holes is used on one side, and a perforated dam is used on the other side of the same tundish. Tundish molten steel samples and slab samples are taken, and analyzed by Aspex inclusion automatic scanning electron microscope. The results show that the dam without holes is beneficial to removal of inclusions in the tundish. There is a short-circuit flow in the molten steel flow field in the tundish of the perforated dam. This leads to a short residence time in the tundish, and inclusions don't have enough time to float up. It floats up and enters the crystallizer and slab with the molten steel. Therefore, the cleanliness of the molten steel cast by the dam without holes tundish is better than that of the perforated dam tundish.

Key words： tundish dam automotive sheet steel inclusion flow field

Received: 24 June 2021

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	Articles by authors
	MA Wen-jun
	LI Hai-bo
	LIU Guo-liang
	ZHU Ke-ran

Cite this article:

MA Wen-jun,LI Hai-bo,LIU Guo-liang等. Tundish metallurgical technology of advanced automotive sheet[J]. CONTINUOUS CASTING, 2021, 40(5): 99-102.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20210077 OR http://www.chinamet.cn/Jweb_lz/EN/Y2021/V40/I5/99

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