镀锡板夹杂缺陷分析及控制

doi:10.13228/j.boyuan.issn1005-4006.20200062

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Abstract Aiming at the surface defects of cold-rolled tin plate, the main causes of spot/linear defects of cold-rolled tin plate were obtained by sampling and analyzing with electron microscope. It shows that the main causes of the spot/linear defects of tinplate are the slag entrapment(Al-Ca-Mg-Na-O complex inclusions) and Al₂O₃ inclusions. By studying the cause of inclusions in the process of converter-RH refining-continuous casting, the inclusions were controlled effectively by controlling the converter tapping oxygen, extending circulation time of deoxidization-alloying and reducing oxygen blowing in RH refining process, optimizing the continuous casting process including nozzle immersion depth, argon flow rate, mold fluxes, and the amendment rate in cold rolling process caused by steelmaking process reduced obviously from 2%-3% to below 0.5%.

Key words： tinplate inclusion slag entrapment continuous casting refining unsteady casting

Received: 20 May 2020

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	Articles by authors
	YUAN Gang
	YANG Zhi-chao
	TANG Shu-ping
	KONG Yong-jiang
	YANG Yun-chao
	LIU Gui-fu

Cite this article:

YUAN Gang,YANG Zhi-chao,TANG Shu-ping等. Analysis and control of inclusion defects of tinplate steel slab[J]. CONTINUOUS CASTING, 2020, 39(6): 62-67.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20200062 OR http://www.chinamet.cn/Jweb_lz/EN/Y2020/V39/I6/62

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