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采用SEM、EDS和Thermo-Calc热力学计算等方法,分析了镍基高温合金GH4133B在不同时效时间和时效温度下的组织演化规律。从而对改善合金的服役性能提供理论依据。试验结果表明:随着时效时间的延长和时效温度的升高,晶粒尺寸无变化,碳化物种类、分布和数量变化均不明显;长期时效后的γ′强化相的尺寸较时效前都有所增加,尤其800℃时长大最明显,形状也由球形颗粒变为方形颗粒并出现一定的取向性;800℃时效500 h以上或更长时间后,合金中开始出现少量针状的η相在晶界及一次碳化物附近析出。
The microstructure evolution of GH4133B superalloy under different aging time and aging temperature was analyzed by SEM, EDS and Thermo-Calc thermodynamic calculation. Thus providing a theoretical basis for improving the service performance of the alloy. The results show that with the aging time increasing and the aging temperature increasing, the grain size does not change and the types, distribution and quantity of carbides are not obvious. The size of γ ’strengthening phase after long-term aging is higher than that before aging Which is the most obvious at 800 ℃. The shape changes from spherical particles to square particles and some orientation appears. After aging at 800 ℃ for 500 h or more, a small amount of needle-shaped η phase appears in the alloy Near the grain boundary and primary carbides.