镍基耐蚀Hastelloy G3合金的组织特征及热力学计算

Microstructure Characteristics and Thermodynamic Calculation of Nickel-based Corrosion Resistant Hastelloy G3 Alloy

摘要:

利用Thermo-Calc软件对镍基耐蚀Hastelloy G3合金进行了热力学计算，系统研究了成分对平衡相析出的影响规律，并通过SEM和TEM对合金时效处理后的析出相进行了观察。结果表明，合金析出的平衡相主要为σ相、μ相、M6C和M23C6；Cr、Mo含量主要影响σ相和μ相析出量及开始析出温度；而C元素显著影响碳化物M6C和M23C6的析出行为；进一步通过试验研究了时效过程中析出相的析出规律。

Abstract:

Thermo-Calc software was used to calculate the thermodynamics of nickel-based corrosion resistant Hastelloy G3 alloy, and the influence of composition on the precipitation of equilibrium phase was systematically studied. The precipitated phase of alloy after aging treatment was observed by the SEM and TEM. The results show that the equilibrium phases of alloy precipitation are mainly σ phase, μ phase, M6C and M23C6; the content of Cr and Mo mainly affect the precipitation of σ phase and μ phase and the initial precipitation temperature; while the content of C significantly affects the precipitation behavior of carbides M6C and M23C6; The precipitation rule of precipitates during the aging process is further studied through experiments.