冷轧无取向硅钢表面白线缺陷成因分析与控制

doi:10.13228/j.boyuan.issn0449-749x.20150126

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Abstract A kind of white sliver defect appeared on the cold-rolled sheet surface of non-oriented electrical steel was systematically investigated in this paper， by performing the scanning electron microscopy (SEM) observation， slab scarfing examination， slab surface pickling treatment and the stopper blowing-argon experiment. The results show that the white sliver defect is originated from mold slag entrapment， which is related to the activation degree of the molten steel flow and the melting status of the powder. By appropriately increasing the blowing argon flow rate of the stopper， increasing the casting speed and optimizing the physical properties of the mold powder， the occurrence of white sliver defect rate on the cold-rolled sheet surface is reduced from 88% to 8%.

Key words： Non-oriented silicon steel surface white sliver defect mold level mold slag entrapment pockmarks

Received: 23 March 2015 Published: 06 January 2016

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TF777

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	GONG Jian
	YU Xian-Hui

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GONG Jian,YU Xian-Hui. Genetic analysis and control of the surface white sliver defect on the cold-rolled non-oriented silicon steel[J]. Iron and Steel, 2016, 51(1): 46-51.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20150126 OR http://www.chinamet.cn/Jweb_gt/EN/Y2016/V51/I1/46

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