|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||8th International Symposium on High Temperature Metallurgical Processing
||E-16: Cleanliness Control Technology of Cold Rolled Steel Sheets
||Haibo Li, Peng Yuan, Bin Chen, Xinhua Wang, Guosen Zhu
|On-Site Speaker (Planned)
The reoxidation of molten steel by oxidizing slag would affect molten steel cleanliness dirtectly during RH end to continuous casting. And there is a good relationship between molten steel cleanliness and the defects sources of cold rolled sheets. The surface defects of cold rolled sheets were analysed by SEM-EDS, then the positions and dimensions of inclusions in slab were calculated according to the width and depth of defects in sheet. The thermodynamic calculation results show the activity of iron oxide reduces with increasing of w(CaO)/w(Al2O3) appropriately when the content of T.Fe in slag remains lower level. In order to enhance the absorption ability of slag to Al2O3 inclusions, w(CaO)/w(Al2O3) should be controlled to 1.0~1.5 in liquid region of slag and w(CaO)/w(Al2O3) closely associate with the content of T.Fe in slag. By dynamic adjustment model of T.Fe content and w(CaO)/w(Al2O3) in slag, the defect ratio of sheets significantly declines.
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