研究了Si含量对GH2909合金室温拉伸、高温拉伸和持久性能的影响。结果表明:在一定含量范围内,提高Si含量可促进GH2909合金中ε相的析出,有利于降低GH2909合金的缺口敏感性从而提高缺口持久性能。同时Si含量提高降低了GH2909合金的室温、高温拉伸强度,提高了塑性。 The effects of Si content on the tensile properties, tensile properties and long-term tensile properties of GH2909 alloy were investigated. The results show that increasing Si content within a certain range of content can promote the precipitation of ε phase in GH2909 alloy, which is beneficial to reduce the notch sensitivity of GH2909 alloy and improve the lasting property of notch. At the same time improve the Si content reduces GH2909 alloy room temperature, high temperature tensile strength, improved plasticity.