The calculation of phase diagram is useful for the design of heat treatment process of multicomponent alloy.In this paper,Thermo-Calc software was used to calculate the phase diagram of three kinds of nickel-based powder metallurgy superalloys with different contents of Al and Ti.The types,compositions and temperature ranges of the equilibrium phases of the three alloys at 400～1 400 ℃ were obtained.The effects of different contents of Al and Ti elements on the phase constitution of the alloys were studied.The results show that the precipitation of μ phase is inhibited and the precipitation temperature ofμ phase is decreased with the increase of Al and Ti content,but the precipitation temperature of σ phase is increased and the precipitation temperature of σ phase is promoted.
关键词
粉末高温合金/相图计算/γ'相/碳化物/μ相/σ相
Key words
powder metallurgy superalloys/calculation of phase diagram/γ'phase/carbide/μ phase/σ phase
维普
万方数据