PARAMETER ACQUISITION METHOD FOR CAST-PIECE SOLIDIFICATION SIMULATION AND CAST-IN-PLACE SYSTEM GRIDDING DESIGN METHOD

摘要

The present invention provides a parameter acquisition method for cast-piece solidification simulation and a cast-in-place system gridding design method, comprising: calculating thermodynamic parameters of a superalloy; obtaining a cooling curve of the superalloy under different thickness conditions; measuring the change of the linear expansion coefficient of the superalloy with temperature. The design method comprises: simulating the solidification process of tubular features of different thicknesses, determining the compensation distance of features of different thicknesses; establishing a gridded casting system, dividing the cast piece into a plurality of modules according to thickness, dividing the inside of each module into units of a grid, and ensuring that the cell size is less than the compensation thickness of the feeding distance; performing filling and solidification simulation of the cast piece and the gridded cast-in-place system, and analyzing the defect simulation results. The present invention provides support for the development and manufacturing of large and complex thin-walled high-temperature alloy cast pieces for aeronautics and astronautics, and provides solutions for the development of diversified and complex thin-walled cast-in-place system design.