Analysis Of Nick-base Superalloy Turbine Disc Forming Simulation

Turbine disc is the key component of aviation engine,its performance is important to ensure thereliability and safety of the whole aviation engine.This paper works at a certain type turbine disc ofaviation engine.In this paper,a series of simulation analyses of the macroscopic and microscopicchanges of GH4169alloy during high temperature compression and turbine disc forging weresimulated on DEFORM-3D software.These simulation in this were based on the analysis the hotdeformation behavior of GH4169alloy during pyroplastic deformation,and the method of simulationare finite element and cellular automaton,the main works are as follows:First of all,the ture stress-strain curve of GH4169alloy was studied by isothermal compress testat contant strain rate on Gleeble3500thermal simulation testing machine.Accordingto theexperimental data, studied on effect of deformation condition on flow stress and micro-evolution,established GH4169alloy material contitutuve equations which contains the dynamic recrystallizationand model of dynamic recrystallization.The dislocation during hot deformation process and includedcelluar auto mata model in DEFORM-3D software of GH4169alloy were established with the aid ofconstitutive model.With the constitutive model, dynamic recrystallization model and celluar automata model,simulated the deformation-heat transfer-microstructure compression of GH4169alloy during hightemperature compression process. Analyzed the effect of different deformation conditions on GH1469alloy hot deformation behavior and microstructure evolution, and compared with the tests resultsavailable in the literature, the calculated results showed established model can be used for simulationthe pyroplastic deformation of GH4169alloy.Simulated common hot die forging, isothermal forging and composite sheathed forging of acertain type GH4169alloy turbine disc.The effects of different forging method to turbine disc and diewere studied to find a most suitable forging method.Analyzed the forging defects of the most suitableforging method, and then solve it, which are beneficial for optimizating the forging process ofsuperalloy turbine disc.