研究了GH4169G合金锻造饼坯表层不完全再结晶组织和中间层完全再结晶组织对持久性能的影响。研究结果表明,在标准热处理状态下,具有混晶组织的表层合金比具有等轴晶组织的中间层合金持久性能差,δ相的析出数量、分布情况及晶粒组织变形协调能力是影响持久性能的主要原因。 The effect of incomplete recrystallization on the surface of GH4169G alloy forging billets and the complete recrystallization of the intermediate layer on the permanent properties was studied. The results show that the surface alloying with mixed crystal structure is worse than the intermediate layer alloy with equiaxed crystal structure under standard heat treatment, the precipitation amount and distribution of δ phase and the coordination ability of grain structure deformation are the factors affecting the long-term performance The main reason.