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利用透射电子显微镜和扫描电镜对该合金在不同温度时效后的试样进行观察，用化学定量提取法分析了γ′相的成分，并测定富Ｃｒ（α）相微区成分．实验结果表明，不同的时效温度析出的富Ｃｒ（α）相和γ′相形态不同．在５００℃～６００℃时效时，在基体中首先析出细小均匀的γ′相，同时从晶界上反应型析出富Ｃｒ（α）相．这种γ′相和富Ｃｒ（α）相的复合析出使合金得到明显的强化．
The samples after aging at different temperatures were observed by transmission electron microscopy and scanning electron microscopy. The composition of γ ’phase was analyzed by chemical quantitative extraction method, and the composition of Cr (α) - rich phase was determined. The experimental results show that the different Cr (α) phases and γ ’phases are precipitated at different aging temperatures. At 500 ℃ ~ 600 ℃ aging, the first precipitation in the matrix of fine uniform γ ’phase, while the precipitation from the grain boundary Cr (α) rich phase. The composite precipitation of this γ ’phase and the Cr (α) -free phase significantly strengthened the alloy.