Numerical simulation and process optimization of steel damping casting bearing

By adopting ProCAST The simulation analysis of the horizontal pouring and vertical pouring scheme of the steel damping bearing is carried out by the software. The research shows that although the horizontal pouring scheme is faster in filling speed, the soft moving distance of the metal liquid is long, and because the temperature of the filling end is low, the foam pattern is not fully pyrolyzed, and it is prone to carburization and slag inclusion. The flat soft moving distance is short, the vertical direction rises fast, and the pyrolysis products of the foam liquid at the end of the molten metal almost all drain into the riser, which can effectively reduce the carbon defect of the casting steel. Through the production and processing verification of the test piece, it is also confirmed that the casting quality produced by the vertical casting scheme is better than that by the horizontal casting scheme.

Through the optimization of process parameters and orthogonal test analysis, the following conclusions are obtained: for the influence degree of riser feeding of steel bearing steel casting, pouring temperature > pattern density > negative pressure degree. Through the optimization of process parameters, it is determined that when pouring temperature is 1680 ℃, negative pressure is 0.05Mpa and pattern density is 20g / L, the feeding effect of riser is the best and the quality of casting is the best.

On the basis of the optimal combination of process parameters, in order to improve the process yield of castings, the process scheme was further optimized by adding cold iron and heating covering agent, and the yield was increased to 65%. After processing and inspection, the quality of steel castings produced in small batch was very good, and the qualified rate was as high as 96%.

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