采用光学显微镜、扫描电镜、电子探针等手段对GH4133B合金中η相对力学性能的影响进行了研究。结果表明:GH4133B合金中η相在750~1 000℃析出,析出峰值为980℃,最短时间为5h。少量的η相对力学性能没有影响,η相的增多对合金的拉伸强度和持久寿命影响不显著,η相对Z的影响要比对A的影响要大。冲击性能对η相最为敏感。 The effects of the relative mechanical properties of GH4133B alloy on the mechanical properties of the alloy were investigated by optical microscope, scanning electron microscope and electron probe. The results show that the η phase of GH4133B alloy precipitates at 750-1000 ℃, the peak of precipitation is 980 ℃ and the shortest time is 5h. A small amount of η has no effect on the mechanical properties. The increase of η phase has no significant effect on the tensile strength and the long-term life of the alloy. The effect of η on Z is greater than that on A. The impact performance is the most sensitive to η phase.