GH4133B合金组织特征及平衡相析出热力学研究

Microstructural Characteristics and Thermodynamic Calculation on Precipitated Phases of GH4133B Alloy

摘要:

采用Thermo-Calc热力学计算软件，对GH4133B合金平衡析出相进行模拟计算分析，并进一步对该合金的显微组织特征进行观察分析。结果表明，Ti、Al含量对γ'相析出影响严重，并给出了定量计算结果。C含量能影响M23C6的析出量，对其析出温度没有影响；而Cr含量则主要影响其析出温度，对M23C6的析出量却没有影响。进一步对Ti、Al含量对η相的析出进行了计算分析，实验验证了时效过程中η相的析出及分布形态。

Abstract:

he equilibrium precipitated phases and non-equilibrium solidification of GH4133B alloy were studied by Thermo-Calc software, in order to find the theoretical foundation of heat treatment and hot work processing. The microstructure of the alloy was also observed. The results show that the quantitative calculated results of the precipitated temperature and mass fraction of g ￠ phase based on the effect Ti and Al content were acquired. The content of C can affect the M23C6’s mass fraction but have no influence on its precipitated temperature. The content of Cr has a main effect on the M23C6’s precipitated temperature but no influence on its mass fraction. Further study was done on the relation between the content of Ti & Al and the precipitation of η phase. The precipitation and distribution condition during aging treatment of η phase were also proofed by experiments.