非稳态浇注对帘线钢洁净度的影响

doi:10.13228/j.boyuan.issn1005-4006.20230002

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Abstract In order to have a sound grasp of the cleanliness level of tire cord steel billet produced in a steel plant under unsteady continuously casting condition, and provide the basis for determining reasonable head and tail billet length and the product classification management during industrial production, the cleanliness difference of the billet cast under unsteady and steady casting conditions was analyzed and the slag-steel interface behavior during tundish filling was studied by using water model method in the present study. The reason for the billet cleanliness difference under the two casting conditions was explained. The results show that: The cleanliness of the tire cord steel billet under the unsteady casting condition is obviously lower than that under the steady casting condition. The T.O and N is 1.76 and 1.23 times higher than that under the steady casting condition. The micro-inclusion and macro-inclusion amount of the unsteady and steady casting condition are 52.89 mm^-2 and 26.1 mm^-2, and 11.49 mg/10 kg steel and 4.36 mg/10 kg steel, respectively. Exposure of molten steel, secondary oxidation and slag entrapment during tundish filling process were found to be some reasons that lead to poor cleanliness of the billets under unsteady casting condition.

Key words： tire cord steel unsteady casting condition cleanliness of steel water model inclusions slag entrainment

Received: 05 January 2023

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	Articles by authors
	NIU Shuai
	DENG Wei
	WANG De-jiong
	HU Zhi-yong
	WANG Kai-min
	WANG Yu-hang
	TANG Hai-yan

Cite this article:

NIU Shuai,DENG Wei,WANG De-jiong等. Effect of unsteady casting condition on cleanliness of tire cord steel[J]. CONTINUOUS CASTING, 2023, 42(1): 74-81.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20230002 OR http://www.chinamet.cn/Jweb_lz/EN/Y2023/V42/I1/74

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