Variation of Non-metallic Inclusions composition in X80 Pipeline Steel Refined by High Basicity Slag
The transformation of inclusions was studied when control technology of refining top slag in ladle furnace was used in X80 pipeline steelmaking. Sufficient amount of aluminum was added to experimental heats for final deoxidation during BOF tapping, and then the refining top slag with high basicity and strong reducibility was adopted to transform Al2O3 to inclusions with low melting point. The results show that the composition of inclusions changes in order of “Al2O3→MgO-Al2O3 system→ CaO-MgO-Al2O3 system→ CaO-Al2O3 system. And the inclusions after LF refining are liquid or semi-liquid state at the temperature of steelmaking, which are easily removable to obtain high cleanliness steel by collision, agglomeration and flotation.
transformation of inclusions high basicity top slag removal of inclusions X80 pipeline steel
LI Qiang WANG Xin-hua LI Hai-bo Huang Fu-xiang Yang Jun WANG Wan-jun
School of Metallurgical and Ecological, University of Science and Technology Beijing, Beijing 100083 Shousteel Research Institute, Beijing 100039, China
国际会议
The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)
北京
英文
852-855
2011-05-31（万方平台首次上网日期，不代表论文的发表时间）