摘要:
为探索精炼渣-钢液-夹杂物三者之间的热力学平衡关系,采用Factsage热力学计算软件对GCr15轴承钢CaO-MgO-Al2O3-SiO2精炼渣系各组分活度进行计算。结果表明:1600℃温度下,wMgO=5%时,aAl2O3、aCaO、aMgO及aSiO2的范围分别为0.003~0.04、0.35~0.9、0.49~0.9、0.00008~0.0005,活度波动范围比较大。随着MgO含量增加,精炼渣系的液相区域有所减少,各组分活度波动范围明显减小。当wMgO=10%时,在高碱度范围内,降低碱度、增加Al2O3含量可增大aAl2O3,增加碱度及降低Al2O3含量可增大aCaO、aMgO和aSiO2。与试验结果对比,应用热力学软件计算精炼渣的活度是可行的。
关键词:
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轴承钢 /
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精炼渣 /
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活度 /
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热力学
Abstract:
In order to explore the relationship between refining slag,molten steel and inclusion,the activity of components in CaO-MgO-Al2O3-SiO2 refining slag is calculated by Factsage software.The results indicate that aAl2O3,aCaO,aMgO,aSiO2 at 1 600℃ ranges from 0.003 to 0.04,from 0.35 to 0.9,from 0.49 to 0. 9,from 0.000 08 to 0.000 5,respectively,when wMgOis 5%.With the MgO content increasing to 7%,liquid phase zones of refining slag has reduced.In addition,the activity of refining slag has small fluctuation.Furthermore,with the MgO content increasing to 10%,aAl2O3 can be increased by improving the Al2O3 content and decreasing the basicity(R) at the high basicity.On the contrary,aCaO、aMgO and aSiO2 can be increased by improving the basicity and decreasing the content of Al2O3.In addition,the activity of refining slag obtained from hot experiments and thermodynamic simulation are consistent,which indicates that the thermodynamic simulation by Factsage is feasible in predicting the activity of refining slag.
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