研究了 Fe3Al合金从室温到高温力学性能的变化情况 ,发现在 10 0～ 30 0℃之间 ,该合金的抗拉强度出现了反常温度现象 ,即随着温度的升高 ,抗拉强度也提高 ,并在 30 0℃附近达到最大值。据分析 ,在此温度范围内 ,温度升高塑性逐渐增大 ,同时流变应力提高 ,于是造成了塑性变形能的增加 ,使抗拉强度出现了反常温度现象 The change of mechanical properties of Fe3Al alloy from room temperature to high temperature was studied. It was found that the tensile strength of the alloy was abnormal at 10 0 ~ 300 ℃, that is, the tensile strength increased with the increase of temperature , And reach the maximum around 30 0 ℃. According to the analysis, in this temperature range, the plasticity of temperature increase gradually increases, and the flow stress increases, resulting in an increase of plastic deformation energy, so that the tensile strength of the phenomenon of anomalous temperature