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采用材料热力学计算软件Thermo-calc,计算了FGH96合金中的平衡相,并结合显微组织观察、能谱和相分析,探讨Hf、Zr含量对γ'相和碳化物的影响,及对消除PPB的作用。结果表明:Hf和Zr不会导致产生新相,主要影响MC和γ'相的析出行为与成分。Hf和Zr能显著改变MC型碳化物的组分,增加其热力学稳定性和数量,促进MC型碳化物在合金中的均匀分布,抑制MC向M23C6转变;Hf还可以参与形成γ'相,增加其数量。Hf、Zr有助于消除FGH96合金中的原始颗粒边界(PPB)。
The equilibrium phase in FGH96 alloy was calculated by thermomechanical calculation software Thermo-calc, and the effect of Hf and Zr content on γ 'phase and carbides was discussed in combination with the observation of microstructure, energy spectrum and phase analysis. Role. The results show that Hf and Zr do not lead to the formation of new phases, which mainly affect the precipitation behavior and composition of MC and γ 'phases. Hf and Zr can significantly change the composition of MC type carbides, increase their thermodynamic stability and quantity, promote the uniform distribution of MC type carbides in the alloy, and inhibit the transformation of MC to M23C6. Hf can also participate in the formation of γ 'phase and increase Its quantity Hf, Zr helps to eliminate the primary particle boundary (PPB) in FGH96 alloys.