Prospect of lost foam casting process for cast steel valve body

There are still many places that need to be supplemented and improved for the research on lost foam casting process of valve body parts, and the following places deserve attention:

(1) in the setting of related parameters of ProCAST simulation software, based on the limitation of the financial and material and experimental conditions for the actual measurement of the relevant parameters, the relevant parameters set in the pre-processing platform are based on the default parameters of the simulation software, such as foam pattern, thermal parameters of the sand particles, and the heat transfer coefficient between different interfaces. The heat transfer coefficient between foam pattern and molten metal. There will be a certain error between the simulation results of the default parameter values and the actual production results of the factory. Therefore, in the future simulation production, we should further study the relevant parameters to increase the accuracy of the simulation results.

(2) coating setting: the lost foam casting process in cast steel valve body studied does not take into account the coating on the foam pattern. Because the coating layer is very thin, adding a three-dimensional model will increase the division and difficulty of the grid, and the size of the divided grid unit is smaller than the coating thickness, which will increase the number of grids and improve the calculation difficulty and time. Therefore, whether the limitation of coating simulation can be improved is also a problem worthy of more research in the future.

(3) In the simulation application analysis module, this topic only studies and applies the filling, solidification and casting defects of liquid metal. On this basis, it can also study the deformation, related mechanical properties and microstructure changes of cast steel valve body in lost foam casting process.

(4) Due to the limitation of time and experimental conditions, there is no quantitative analysis and comparison between the old and new process schemes, which can be improved in the future research.

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