Nickel-based Superalloy Solidification Process Of Organizational Modeling And Simulation

The Numerical simulation technology of foundry solidification is one of the current research hotspot in foundry subject science. It is the numerical simulation technology that effectively resolves many problems of classical theory in practice. The computer that has powerful operation disposal and graphics disposal provides practicality for numerical simulation technologies with effective methods.Superalloy is a new-style material with the development of the aviation industry. Engine work efficiency and thrust forces can be increased evidently by increasing the inspiration temperature of turbine. R&D and its applications in high-powered high-temperature structure materials are always important constitutes of the aviation jet-engine developments. Superalloy is one of the alloy materials that are researched abroad and applied maturely. In the process of the researches in superalloy, the composition design of alloys, the temperature field of solidification process and the control of alloy microstructures are the emphasis of the work.The Numerical simulation of the solidification structures of casting process can forecast the form of casting solidification microcosmic structures and mechanics performances and can get the quantitative relations that main craftwork parameters influence cast solidification structures. Thereby, the academic foundation can be provided for optimizing cast craftworks and the optimal quality control can been realized. So far, numerical simulation technologies in temperature field of cast solidification and filling process are much mature. The researches for hot cracking, shrinkage cavity and porosity are very advanced. At present, many researchers begin to study and forecast microcosmic structures of the solidification process. With their long-term hard work and efforts, the simulation of microcosmic structures experiences the processes from qualitative simulation to quantitative simulation, from pointing nucleation to random nucleation, and from pure substance microcosmic simulation to multi-alloy microcosmic simulation. Meanwhile, applied mathematical methods are perfected constantly.With the help of the study item of the Principle and Technique Study about Superalloy Structure Super-fining sponsored by the Fifteen Programming Tasks of the National Defense Basic Science and Engineering Council Scientific Research Fund, The contents of this paper can be summarized as follows:1. According to equivalent heat capacity finite element theory, the analyses of temperature fields distributing of nickel base superalloy low pressure turbine blade in solidification process have been completed using ANSYS software.2. The simulation system of the solidification process of nickel base superalloy turbine blade material has been designed using C++Builder software.3. Continuous nucleation model and dendritic growth dynamics model have been adopted to calculate the eigenvalues of the grain structures in the solidification process of the nickel base superalloy (K4169) column ingot. Grain nucleation and its growth process of the above-mentioned alloy have been simulated by the computer using CA technology. Graphic show styles of grains formation and its growth processes have been realized. The simulation results accord with microstructure experiment results preferably.