IF钢非稳态浇铸铸坯洁净度分析

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Abstract In order to research the impact of unsteady casting process on IF steel slab, the cleanness of IF steel slab of unsteady casting conditions produced by the converter-RH-CC process was investigated by means of gas analysis, chemical composition analysis and big sample electrolysis of first slab, last slab and SEN-changing slab. The results show that TO, N, C content of the first slab rises along with the casting direction while Al and Ti content is just the opposite; average TO content of the whole first slab is 0.0015% higher than other slabs, and N content 0.0005% higher than other slabs, C content exceeds the criteria; the highest TO content of last slab and SEN-changing slab is 1.6 and 2.2 times average level of normal slabs, N content of last slab and SEN-changing slab fluctuation is 1.0-13 and 1.5-1.7 times average level of normal slabs, C content of last slab and SEN-changing slab fluctuation is 1.2-14 and 1.2-2.1 times average level of normal slabs, while other composition of last slab and SEN-changing slab has not very big fluctuation; content of large-sized inclusion of first slab is 34.37mg/(10kg) which is the highest, and then the last slab, and then the SEN-changing slab, ladle-casting-stop slab, content of large-sized inclusion of the normal slab is lower than 1.24mg/(10kg).

Received: 07 December 2011 Published: 30 July 2012

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TF762+.8

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	GAO Pan
	TIAN Zhi-Hong

Cite this article:

GAO Pan,TIAN Zhi-Hong. Research on Cleanness of IF Steel Slab Produced in Unsteady Casting Process[J]. Iron and Steel, 2012, 47(7): 31-35.

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http://www.chinamet.cn/Jweb_gt/EN/ OR http://www.chinamet.cn/Jweb_gt/EN/Y2012/V47/I7/31

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