铸造Fe-Cr-B-Al合金相图计算及实验验证  

Phase Diagram Calculation and Experimental Research on Casting Fe-Cr-B-Al Alloys

作　　者：马跃[1] 符寒光[1] 袁园[2] 朱礼龙[3] 江亮[3] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]沧州职业技术学院机械工程系,河北沧州061001 [3]中南大学粉末冶金研究院,湖南长沙410012

出　　处：《铸造》2015年第10期950-954,959,共6页Foundry

基　　金：国家自然科学基金(51274016);北京市自然科学基金(2142009);北京教委科技项目(PXM2015-014204-500170)

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。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.

关 键 词：Fe-Cr-B-Al合金 THERMO-CALC 相图计算 相图验证 

分 类 号：TG113.14[金属学及工艺—物理冶金]