【摘要】 利用相图计算软件Thermo-Calc计算并绘制了不同Al含量的Fe-10%Cr-B-x Al-C五元体系的垂直截面图,900℃平衡状态下组织中各相随Al含量的定量变化趋势图以及Fe-10%Cr-1.5%B-2%Al-0.3%C合金的平衡凝固过程图。选取了Fe-10%Cr-1.5%B-2%Al-0.3%C、Fe-10%Cr-1.5%B-4%Al-0.3%C两个成分的合金进行实验研究。利用DSC对合金的相变温度点进行检测,利用SEM-EDS、光学显微镜及XRD对不同相区的组织组成进行分析。结果表明:计算相图与实验测定结果无论是在相成分还是在相变温度上基本吻合,这也证明了Thermo-Calc计算软件中关于Fe-Cr-B-Al合金的热力学数据比较可靠,可以用来指导合金的成分及热处理工艺的设计。更多还原

【Abstract】 The vertical sections of Fe-10%Cr-B-x Al-C quinary system with different aluminum contents, the effect of aluminum content on the change trend of phase content in Fe-10%Cr-1.5%B-Al-0.3%C quinary system at 900℃ and the equilibrium solidification processes of Fe-10% Cr-1.5% B-2% Al-0.3% C alloy have been calculated by use of Thermo-Calc software. The Fe-10%Cr-1.5%B-2%Al-0.3%C、Fe-10%Cr-1.5%B-4%Al-0.3%C alloy were chosen to be studied by experiment. The phase transition temperatures were measured by DSC and the microstructure and the phase types were detected by SEM-EDS and XRD. The results indicate that calculated phase diagrams agree well with the experimental results and further prove the thermodynamics database of Thermo-Calc software to be reliable and it can be used to help design the alloy composition and heat treatment process.更多还原