Phase Diagram Calculation of Ni-based Powder Metallurgy Superalloys
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.
powder metallurgy superalloyscalculation of phase diagramγ'phasecarbideμ phaseσ phase
万方数据
维普
