Fe-Mn-Al-C系低密度钢开发中数值模拟的应用

借助FactSage与JMatPro数值模拟软件对Fe-(5～15)Mn-(6～12)Al-(0.5～1.0)C系低密度钢的密度、凝固及冷却路径、相变及析出相进行了研究.利用FactSage软件中的FSstel数据库对该体系的垂直截面相图进行计算,分析了Mn、Al及C元素对凝固及冷却过程中相变及析出相的影响,并得到了F...

Application of Numerical Simulation during Development of Fe-Mn-Al-C Low Density Steel

The density, solidification and cooling path, phase transformation and precipitates phase of Fe-( 5 ~ 15 ) Mn-( 6 ~ 12)Al-( 0. 5 ~ 1. 0 )C low density steel are studied by FactSage and JMatPro numerical simulation software. The vertical sections of phase diagram of this system is calculated by using the FSstel database of FactSage software. Based on these vertical sections, the influence of Mn, Al and C is analyzed in the phase transformations and precipitates phase during solidification and cooling to get a diagram of the equilibrium phase-transformation path of Fe-12Mn-8. 5A1-0. 8C low density steel. The results indicate that the full-phase transformation path of Fe-12Mn-8. 5Al-0. 8C low density steel during the cooling process from 1 600 °C to 600 °C is Liquid → Liquid + Ferrite → Liquid + Ferrite + Austenite → Ferrite + Austenite → Austenite → Austenite + κ-carbide Ferrite + Austenite + κ-carbide. With the increase of C and Mn contents ， the austenite phase zone can be enlarged and the austenite can be stabilized. With the increase of Al contents, the austenite phase zone can be reduced and the ferrite can be stabilized. The precipitation temperature of K-carbide increases with the increase of Al and C content, and Al and C can promote the precipitation of carbides K-carbide precipitation. The density of Fe-12Mn- 8. 5Al-0e 8C low density steel calculated by JMatPro is 7. 05 g/cm³ , and the density of steel measured by experiment is 7. 00 g/cm³.