Best Composition of CaO-Al2O3 Slag System for Refining of 20CrMnTiH Steel
GE Yun-zong1,2 , YAN Hui-cheng2 , WANG Jian-jun1,CAO Chun-lei1,2 QIU Sheng-tao2
1. School of Metallurgy and Resource，Anhui University of Technology，Ma’anshan 243002，Anhui，China 2. National Engineering Research Central of Continous Casting Technology, Central Iron and Steel Research Institute，Beijing 100081, China
Abstract：The effect of the refining slag composition changing on total oxygen content and inclusions was investigated. The mutual influences between slag and molten steel were studied by factsage thermodynamic calculation software. The results show that the effects of slag indexes are mainly attributed to the changes of activities of CaO and Al2O3. The higher “Al2O3 capacity” induced by the changes of activities of CaO and Al2O3 in slag is helpful to decrease the T.O content. Meanwhile, the proper refining slag content for smelting 20CrMnTiH is proposed on this basis, which is CaO 50%-55%, Al2O3 30%-35%, SiO2 6%-8%, MgO 5%-8%, others≤3%. Through industrial test using this refining slag, the result shows that the total oxygen in slab is reduced to 10×10-6.
收稿日期: 2012-12-03
出版日期: 2013-10-14
引用本文:
葛允宗 ，颜慧成 ，王建军，曹春磊 ，仇圣桃. 生产20CrMnTiH钢的最佳CaO-Al2O3渣系成分[J]. 钢铁, 2013, 48(10): 23-27.
GE Yun-zong, , YAN Hui-cheng , WANG Jian-jun,CAO Chun-lei, QIU Sheng-tao. Best Composition of CaO-Al2O3 Slag System for Refining of 20CrMnTiH Steel. Iron and Steel, 2013, 48(10): 23-27.
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Taguchi K, OnoNakazato H, et al. Complex Deoxidation Equilibria of Molten Iron by Aluminium and Calcium［J］. ISIJ International, 2005, (45)11:1572.［2］Park J H, Todoroki H. Control of MgO·Al2O3 Spinel Inclusions in Stainless Steels［J］. ISIJ International, 2010, 50(10):1333.［3］于平，陈伟庆，冯军，等.高碱度渣精炼的轴承钢中夹杂物研究［J］.钢铁，2004，39(7)：20.［4］陈斌，姜敏，包萨日娜，等. 渣组成对钢水洁净度的影响［J］. 钢铁，2008，43(8)：35.［5］Yoon B H, Heo K H, Kim J S, et al. Improvement of Steel Cleanliness by Controlling Slag Composition［J］. Ironmaking Steelmaking, 2002, 29(3)：215.［6］汤曙光. LFVD精炼渣组成对冶金效果的影响［J］. 炼钢，2001，17(4)：29.［7］Park J H, Jung I H, Lee H G. Dissolution Behavior of Al2O3 and MgO Inclusions in the CaOAl2O3SiO2 Slags: Formation of Ringlike Structure of MgAl2O4 and Ca2SiO4 Around MgO Inclusions［J］. ISIJ International, 2006, 46(11):1626.［8］葛允宗，王建军，颜慧成，等. 含Ti齿轮钢中TiN夹杂析出的热力学讨论及其控制［J］. 钢铁钒钛，2012，33（5）：50.［9］傅杰，朱剑，迪林，等.微合金钢种TiN的析出规律研究［J］. 金属学报，2000，36（8）：801.［10］Yoon B H，Heo K H，Kim J S，et al. Improvement of Steel Cleanliness by Controlling Slag Composition［J］. Ironmaking and Steelmaking，2002，29(3)：215.
2013, Vol. 48 
