第6期 金利玲等:Cao Sio2一A2Os一M血O系低熔点区域控制 .577 物熔点有重要影响,为了对比Ca0/SiO2比对四元 (3)Ca0/Si02比值对Ca0Si02一Al203-Mn0 系Ca0SiO2一Al203一Mn0低熔点区域的影响,作 系夹杂物低熔点区域大小有着重要影响,应控制 Ca0/Si02比分别为0.93,1.4,1.87和2.8的四元 Ca0/Si02比值为0.8~1.由于夹杂物的成分可以 相图.图7表示出Ca0/Si02比与低熔点(低于 用钢液与夹杂物间的平衡热力学来预测,当钢渣间 1400℃)区域面积所占百分比的关系, 达到热力学平衡时,夹杂物的成分与钢渣的成分趋 40 于一致,因此本文的研究将为更好控制钢渣的成分 提供了有力的理论基础,并为研究钢液与夹杂物,钢 20 一渣之间的关系提供另一可靠途径,大大减少工 作量 0 参考文献 51.01.52.0253.0 Cao/SiO, [1】邢献强,李居强.钢帘线用超高强度钢丝的研究进展,金属制 品,1999,25(6):7 图7低于1400℃区域面积比例与Ca0/SiO2比的关系 [2]顾克井,魏军,蔡开科,等.72A钢非金属夹杂物行为.北京 Fig-7 Relationship of low melting area percent to CaO/SiO ratio 科技大学学报,2003,25(1):26 通过图7分析得出:随着Ca0/Si02比值的增 [3]Bernard G,Ribound P V,Urbain G.Oxide inclusions plasticity. Rev Metall CIT:1981,78(5):421 大,低熔点区域越来越小,CaO/SiO2<1时低熔点区 [4]Malm S.On the precipitation of slag inclusions during solidifica- 域最大.根据实际生产情况,应将CaO/SiO2比值控 tion of high carbon steel deoxidized with aluminium and mish met- 制在0.8~1为宜, al.Scand J Metall,1976.15:248 [5]Bale C W.Chartrand P.Degterov S A.et al.FactSage thermo 3结论 chemical software and databases.Calphad,2002.26(2):189 [6]Pelton A D.Thermodynamic database development:modeling and (1)Al203和Ca0含量对Ca0Si02一Al203一 phase diagram calculations in oxide systems.Rare Met.2006.25 MnO系夹杂物低熔点区域大小影响有着相同的规 (5):473 律:随着Al203和Ca0含量的增加,夹杂物低熔点 [7]Sundman B.Review of alloys modeling.Anal Fisica Ser B. 区域都是先增大后减小.为了得到低熔点夹杂物, 1990,86(2):69 应控制Si02一Alz03Ca0一Mn0系中Al203质量分 [8]Agren J.A note on the use of different representations of excess" 数为20%左右,Ca0质量在25%~30%之间 energies in ternary systems.Calphad,1982,6(4):279 [9]Maeda S,Soejima T.Shape control of inclusions in wire rod for (2)Si02和Mn0含量对Ca0Si02一Al203一 high tensile tire cord by refining with synthetic slag /Steelmaking Mn0系夹杂物低熔点区域大小影响有着相同的规 Conference Proceedings.Warrendale,1989:379 律:随着SiO2和Mn0含量的增加,夹杂物低熔点区 [10](西德)德国钢铁工程师协会编.渣图集.王俭,彭有强,毛裕 域都是一直增大,即适量的SiO2和Mn0含量对降 文,译.北京:冶金工业出版社,1989:89 [11]王立蜂.Si一M合金脱氧高碳钢中非金属变形夹杂物的研究 低夹杂物的熔点和扩大塑性区有作用,与文献[11] [学位论文],北京:北京科技大学,2004:32 的结果一致,也证实了本文介绍的方法可行 Control on low melting point area in a CaO SiO2 Al203 MnO system JIN Liling).WANG Haitao),XU Zhongbo),WANG Fuming) Metallurgical and Ecological Engineering School.University of Science and Technology Beijing.Beijing 100083,China ABSTRACI The compositions of low melting point inclusions in a CaO SiOz Al2O3 MnO system were calcu- lated and analyzed by thermodynamic software FactSage.The results show that the area of low melting point in- clusions first increases then decreases with the alumina and calcium oxide contents accumulating.However,it al- ways increases with the silica and manganese oxide contents rising.To obtain low melting point inclusions,the alumina and silica contents should be approximately controlled to 20%and 30%,respectively,the Ca content restricted to 25%-30%,and Cao/SiO2 should be 0.8-1. KEY WORDS steelmaking;Cao SiO2 Al203 MnO system;thermodynamic computation;inclusions;com- position control物熔点有重要影响.为了对比 CaO/SiO2 比对四元 系 CaO-SiO2-Al2O3-MnO 低熔点区域的影响作 CaO/SiO2 比分别为0∙931∙41∙87和2∙8的四元 相图.图 7 表示出 CaO/SiO2 比与低熔点 (低于 1400℃)区域面积所占百分比的关系. 图7 低于1400℃区域面积比例与 CaO/SiO2 比的关系 Fig.7 Relationship of low melting area percent to CaO/SiO2 ratio 通过图7分析得出:随着 CaO/SiO2 比值的增 大低熔点区域越来越小CaO/SiO2<1时低熔点区 域最大.根据实际生产情况应将 CaO/SiO2 比值控 制在0∙8~1为宜. 3 结论 (1) Al2O3 和 CaO 含量对 CaO-SiO2-Al2O3- MnO 系夹杂物低熔点区域大小影响有着相同的规 律:随着 Al2O3 和 CaO 含量的增加夹杂物低熔点 区域都是先增大后减小.为了得到低熔点夹杂物 应控制 SiO2-Al2O3-CaO-MnO 系中 Al2O3 质量分 数为20%左右CaO 质量在25%~30%之间. (2) SiO2 和 MnO 含量对 CaO-SiO2-Al2O3- MnO 系夹杂物低熔点区域大小影响有着相同的规 律:随着 SiO2 和 MnO 含量的增加夹杂物低熔点区 域都是一直增大即适量的 SiO2 和 MnO 含量对降 低夹杂物的熔点和扩大塑性区有作用与文献[11] 的结果一致也证实了本文介绍的方法可行. (3) CaO/SiO2 比值对 CaO-SiO2-Al2O3-MnO 系夹杂物低熔点区域大小有着重要影响应控制 CaO/SiO2 比值为0∙8~1.由于夹杂物的成分可以 用钢液与夹杂物间的平衡热力学来预测当钢渣间 达到热力学平衡时夹杂物的成分与钢渣的成分趋 于一致.因此本文的研究将为更好控制钢渣的成分 提供了有力的理论基础并为研究钢液与夹杂物钢 -渣之间的关系提供另一可靠途径大大减少工 作量. 参 考 文 献 [1] 邢献强李居强.钢帘线用超高强度钢丝的研究进展.金属制 品199925(6):7 [2] 顾克井魏军蔡开科等.72A 钢非金属夹杂物行为.北京 科技大学学报200325(1):26 [3] Bernard GRibound P VUrbain G.Oxide inclusions plasticity. Rev Metall CIT198178(5):421 [4] Malm S.On the precipitation of slag inclusions during solidification of high-carbon steel deoxidized with aluminium and mish metal.Scand J Metall197615:248 [5] Bale C WChartrand PDegterov S Aet al.FactSage thermochemical software and databases.Calphad200226(2):189 [6] Pelton A D.Thermodynamic database development:modeling and phase diagram calculations in oxide systems.Rare Met200625 (5):473 [7] Sundman B.Review of alloys modeling.Anal Fisica Ser B 199086(2):69 [8] Agren J.A note on the use of different representations of excessenergies in ternary systems.Calphad19826(4):279 [9] Maeda SSoejima T.Shape control of inclusions in wire rod for high tensile tire cord by refining with synthetic slag∥Steelmaking Conference Proceedings.Warrendale1989:379 [10] (西德)德国钢铁工程师协会编.渣图集.王俭彭亻育强毛裕 文译.北京:冶金工业出版社1989:89 [11] 王立峰.Si-Mn 合金脱氧高碳钢中非金属变形夹杂物的研究 [学位论文].北京:北京科技大学2004:32 Control on low melting point area in a CaO-SiO2-Al2O3-MnO system JIN L iling 1)WA NG Haitao 1)XU Zhongbo 1)WA NG Fuming 2) Metallurgical and Ecological Engineering SchoolUniversity of Science and Technology BeijingBeijing100083China ABSTRACT The compositions of low melting point inclusions in a CaO-SiO2-Al2O3-MnO system were calculated and analyzed by thermodynamic software FactSage.The results show that the area of low melting point inclusions first increases then decreases with the alumina and calcium oxide contents accumulating.Howeverit always increases with the silica and manganese oxide contents rising.To obtain low melting point inclusionsthe alumina and silica contents should be approximately controlled to20% and30%respectivelythe CaO content restricted to25%-30%and CaO/SiO2should be0∙8-1. KEY WORDS steelmaking;CaO-SiO2-Al2O3-MnO system;thermodynamic computation;inclusions;composition control 第6期 金利玲等: CaO-SiO2-Al2O3-MnO 系低熔点区域控制 ·577·