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 1.0-13 and 1.5-1.7 times average level of normal slabs, C content of last slab and SEN-changing slab fluctuation is 1.2-14 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).
高攀，田志红,崔阳,胡帅,李永林,朱立新. IF钢非稳态浇铸铸坯洁净度分析[J]. 钢铁, 2012, 47(7): 31-35.
GAO Pan1,TIAN Zhi-hong1,CUI Yang1,HU Shuai2,LI Yong-lin1,ZHU Li-xin1. Research on Cleanness of IF Steel Slab Produced in Unsteady Casting Process. Iron and Steel, 2012, 47(7): 31-35.
ZHANG Qiaoying, WANG Litao, WANG Xinhua, et al. Influence of Casting Speed Variation during Unsteady Continuous Casting on Non-metallic Inclusions in IF Steel Slabs[J]. ISIJ International, 2006, 46(10): 1421.
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ZHANG Qiaoying, WANG Litao, WANG Xinhua, et al. Influence of Casting Speed Variation during Unsteady Continuous Casting on Non-metallic Inclusions in IF Steel Slabs[J]. ISIJ International, 2006, 46(10): 1421.
2012, Vol. 47 
