不同温度下60Si2MnA弹簧钢中低熔点夹杂物生成热力学  

Thermodynamics on formation of low melting point inclusions at different temperatures in 60Si2MnA spring steel

作　　者：张博[1,2] 王福明[1,2] 李长荣[1] 吴华林[1,2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京科技大学生态与循环冶金教育部重点实验室,北京100083

出　　处：《北京科技大学学报》2011年第3期281-288,共8页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.50874007);北京市教育委员会共建项目专项

摘　　要：借助FactSage热力学软件分别对1873、1823和1773 K三个不同温度下60Si2MnA弹簧钢液与MnO--SiO2--Al2O3系、CaO--Al2O3--SiO2系和CaO--Al2O3--SiO2--15%MgO系夹杂物间的平衡进行了计算.通过上述计算分析,确定了三个不同温度下分别形成上述低熔点夹杂物时所对应的钢液成分.经过对比还发现:低温更有利于钢液在低溶解氧含量条件下实现上述不同类型夹杂物的低熔点化控制.钢液中生成低熔点SiO2--Al2O3--CaO--15%MgO系夹杂物要比生成低熔点SiO2--Al2O3--CaO系夹杂物所需的钢液Al含量高很多,这在实际生产中更容易控制.Equilibria between 60Si2MnA molten spring steel and such low melting point inclusions as MnO-SiO2-Al2O3 inclusions, CaO-Al2O3-SiO2 inclusions and CaO-Al2O3-SiO2-15% MgO inclusions were thermodynamically studied by the thermodynamic software FactSage at three different temperatures of 1 873, 1 823 and 1 773 K. On the basis of these calculations, the compositions of the liquid steel were determined when these low melting point inclusions formed at the different temperatures. Simultaneously, it was also discovered by comparison that low temperature is more beneficial to fulfill the control of the low melting point inclusions under the condition of low soluble oxygen content. The soluble aluminum content for the formation of CaO-Al2 O3-SiO2-15% MgO inclusions is much higher than that for the formation of CaO-Al2 O3-SiO2 inclusions, and it is easily controlled in actual production.

关 键 词：弹簧钢 夹杂物 热力学 计算机软件 

分 类 号：TF701.2[冶金工程—钢铁冶金]