Numerical Simulation and Application of Inclusion Movement in Horizontal Centrifugal Casting Pipe Filling Process

The applied force of fluid particles in the filling process of horizontal centrifugal casting was analyzed, and the precipitation separation time of different kinds of inclusions and optimal pouring temperature were deduced according to the movement law of inclusions. The movement trajectory of inclusions in the filling process of horizontal centrifugal casting was established using ProCAST software, and the numerical simulation and process optimization of the movement trajectory and final residence position of inclusions in centrifugal casting pipes under different rotating speeds were carried out. The results show that the smaller the density of inclusions is and the larger the particle size is, the shorter the separation time is. It is found that 5 mu m SiO2 inclusions are most likely to be thrown out of the liquid metal under the action of centrifugal force and finally stay on the inner surface of the cast pipe. The optimal pouring temperature for L605 centrifugal casting pipe is 1580 degrees C, and the optimal centrifugal speed is 2800 r/min. Under the condition of these optimal process parameters, the actual casting experiment of centrifugal cast pipe was carried out, and the inclusion distribution information was obtained by optical microscope (OM) and scanning electron microscope (SEM-EDS). The microscopic analysis result of inclusions in actual castings is consistent with the simulation result, which verifies the effectiveness of the prediction and simulation results.