Ti-40Al-10Fe合金的组织和铸造性能

秦龙飞; 黄家硬; 苏广才; 梁洁; 汤宏群; 刘宏伟

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Ti-40Al-10Fe合金的组织和铸造性能
Microstructure and Castability of Ti-40Al-10Fe Alloy
2011年31卷第2期页码：161-163
纸质出版日期： 2011 ，
DOI：

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[1]秦龙飞,黄家硬,苏广才,梁洁,汤宏群,刘宏伟.Ti-40Al-10Fe合金的组织和铸造性能[J].特种铸造及有色合金,2011,31(02):161-163+204.

Qin Longfei, Huang Jiaying, Su Guangcai, et al. Microstructure and Castability of Ti-40Al-10Fe Alloy[J]. Special Casting & Nonferrous Alloys, 2011,31(2):161-163.
[1]秦龙飞,黄家硬,苏广才,梁洁,汤宏群,刘宏伟.Ti-40Al-10Fe合金的组织和铸造性能[J].特种铸造及有色合金,2011,31(02):161-163+204. DOI：

Qin Longfei, Huang Jiaying, Su Guangcai, et al. Microstructure and Castability of Ti-40Al-10Fe Alloy[J]. Special Casting & Nonferrous Alloys, 2011,31(2):161-163. DOI：

摘要

采用氩气保护真空水冷铜坩埚磁悬浮熔炼法制备了Ti-40Al-10Fe（摩尔分数）合金。使用扫描电镜、X射线衍射仪、能谱仪和显微硬度计分析了合金的组织和性能。同时

讨论了Fe对合金的组织和性能的影响。结果表明

合金铸态组织为树枝状晶和少量的等轴晶

主要由γ-TiAl相和τ2相组成;Fe和Al在等轴晶区存在偏析。对Ti-40Al-10Fe和Ti-48Al-10Nb合金的对比试验表明

Ti-40Al-10Fe合金的铸造性能更佳

且消除了缩孔

硬度（HV）达到497

远大于Ti-48Al-10Nb的330。

Abstract

Ti-40Al-10Fe（atom percentage）alloy was prepared by vacuum magnetic levitation melting with water-cooling copper crucible under argon atmosphere.Microstructure and properties of the alloy were investigated by SEM（scanning electron microscope）

XRD（X-ray diffraction）

EDS（energy dispersive spectrometer）and micro-hardness tester.The results show that microstructure of the alloy consists of dendrites and a little equiaxed grain

which is composed of γ-TiAl phase and τ2 phase.There exists segregation of Fe and Al in equiaxed grain zone.Castability of Ti-40Al-10Fe is superior to that of Ti-48Al-10Nb alloy

and absence of shrinkage hole can be observed in the Ti-40Al-10Fe alloy

and its micro-hardness reaches 497（Hv）

far away higher than that of Ti-48Al-10Nb alloy（330Hv）.Meanwhile

effects of Fe element on the microstructure and properties of the alloy were described.