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采用SEM,XRD和TMS系统地研究了电弧熔炼Fe_(100-x)Nb_x(x=6,9,12,15,17)合金的显微组织和压缩性能.结果表明,合金主要由初生相(α-Fe或Fe_2Nb)和共晶组织(L→α-Fe+Fe_2Nb)组成;Fe_(91)Nb_9合金具有最佳的综合力学性能,其压缩断裂强度可达1.63 GPa,屈服强度可达1.04 GPa,压缩应变延伸率可达23%.用Hf部分代替Fe_(91)Nb_9合金中的Nb,对合金的显微组织和压缩力学性能不产生明显影响;用Y部分代替Fe_(91)Nb_9合金中的Fe会使合金的力学性能急剧恶化.
The microstructures and compressive properties of the Fe-100-xNb_x (x = 6,9,12,15,17) alloy were investigated systematically by SEM, XRD and TMS.The results show that the alloy is mainly composed of the primary phase α-Fe or Fe_2Nb) and eutectic microstructure (L → α-Fe + Fe_2Nb). The Fe_ (91) Nb_9 alloy has the best comprehensive mechanical properties with a compressive rupture strength of 1.63 GPa and a yield strength of 1.04 GPa , And the elongation at break of the compressive strain can reach 23% .Hf partly replaced by Nb in Fe_ (91) Nb_9 alloy did not significantly affect the microstructure and compressive mechanical properties of the alloy; Y part replaced Fe_ (91) Nb_9 alloy Fe will deteriorate the mechanical properties of the alloy dramatically.