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利用电子探针测定合金的枝晶干和枝晶间各元素的含量,通过扫描电镜观察时效不同时间后的γ′相形貌。结果表明:通过理论计算,进一步证明了本实验中的固溶处理制度的合理性;高温时效4h后,γ′相的正方度良好,且尺寸较小(150～320nm),延长时效时间,γ′相长大,继续延长时间,γ′相边缘开始钝化。因此,高温时效时间选择4h。
The content of each element in the dendrite and dendrite of the alloy was measured by electron probe and the γ ’phase morphology at different time after aging was observed by scanning electron microscope. The results show that the rationality of the solution treatment system in this experiment is further proved by theoretical calculation. After the aging at high temperature for 4h, the squareness of γ ’phase is good, and the size is small (150-320nm), prolonging the aging time, γ ’Grow up, continue to extend the time, γ’ phase edge began to passivation. Therefore, the high temperature aging time selected 4h.