Abstract
Thermodynamics software on inclusions prediction in 430 stainless steel was developed with Matlab and VC++. The inclusions’ composition could be predicted by composition of molten steel input, and equilibrium phase diagrams of MgO•Al2O3, 2MgO•SiO2, 3Al2O3•2SiO2 and 2Al2O3•2MgO•5SiO2 were displayed on the main interface simultaneously. The following predicted results by inputing experiments data at 1873 K can be gained that When Si content is 3.9×10-3and Al content is 3.5×10-4, MgO•Al2O3 spinel inclusions is unformed in case of Mg content with larger than 1.71×10-5; while MgO•Al2O3 spinel inclusions transformed into 2Al2O3•2MgO•5SiO2 inclusions in case of Mg content being less than 2.9×10-8. The predicted results of software fit well with the experiment results, Therefore, the software can provide some results for controlling the composition of inclusions in molten steel.
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