The Study And Optimization Of Casting Technology For Marine Propeller Based On ProCAST

The casting quality of the propeller affects not only the service life, but also the safety of navigation. But casting defects directly affect the casting quality of the propeller. Therefore,during casting propeller, strict measures should be taken to prevent casting defects, and numerical simulation software in casting process can forecast and analysis casting defects in order to reduce defects, shorten the cycle, and reduce the production cost.This paper uses ProCAST software as the tool of numercial simulation, with a view to the serious defects that influence propeller casting quality, to confirm copper propeller parameters which affect the quality,and uses many groups of the experimental data to design the flow field and temperature field in filling and solidification process.So its technological parameters can be determined based on these simulations. The pouring temperature, casting velocity and mold temperature can affact the filling and solidification process and shrinkage defect. Pouring temperature which plays a main role has greater influence in filling and solidification process and shrinkage porosity. Casting velocity can affect the filling time. The higher casting velocity is, the more excessive turbulence will be generated;The lower casting velocity may cause the lack of the water defects. Mold temperature has less influence in filling process.but it can affect the solidification time. The higher mold temperature is, the longer solidification time is, and vice versa. Therefore, it is important to confirm pouring temperature, casting velocity and mould temperature of the propeller.Based on many experiments and simulation analysis, the optimal combination of the propeller casting process parameter is that:pouring temperature 1170℃, casting velocity 1.85m/s, mould temperature 100℃. It can be found that this combination of process parameter can reduce the defects such as gas trapping, oxide inclusion, shrinkage cavity and porosity, and shorten the production cycle of casting. This simulation and analysis can provide the guidance and reference significance to determine the optimal parameters and improve the quality of casting.