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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∙93‚1∙4‚1∙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‚1999‚25(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‚2003‚25(1):26 [3] Bernard G‚Ribound P V‚Urbain G.Oxide inclusions plasticity. Rev Metall CIT‚1981‚78(5):421 [4] Malm S.On the precipitation of slag inclusions during solidifica￾tion of high-carbon steel deoxidized with aluminium and mish met￾al.Scand J Metall‚1976‚15:248 [5] Bale C W‚Chartrand P‚Degterov S A‚et al.FactSage thermo￾chemical software and databases.Calphad‚2002‚26(2):189 [6] Pelton A D.Thermodynamic database development:modeling and phase diagram calculations in oxide systems.Rare Met‚2006‚25 (5):473 [7] Sundman B.Review of alloys modeling.Anal Fisica Ser B‚ 1990‚86(2):69 [8] Agren J.A note on the use of different representations of excess￾energies in ternary systems.Calphad‚1982‚6(4):279 [9] Maeda S‚Soejima T.Shape control of inclusions in wire rod for high tensile tire cord by refining with synthetic slag∥Steelmaking Conference Proceedings.Warrendale‚1989:379 [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 School‚University of Science and Technology Beijing‚Beijing100083‚China ABSTRACT The compositions of low melting point inclusions in a CaO-SiO2-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 to20% and30%‚respectively‚the CaO content restricted to25%-30%‚and CaO/SiO2should be0∙8-1. KEY WORDS steelmaking;CaO-SiO2-Al2O3-MnO system;thermodynamic computation;inclusions;com￾position control 第6期 金利玲等: CaO-SiO2-Al2O3-MnO 系低熔点区域控制 ·577·
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