Three-dimensional prediction method capable of realizing growth and segregation of steel solidification dendrites

Abstract

A three-dimensional prediction method capable of realizing growth and segregation of steel solidification dendrites belongs to the technical field of metallurgical continuous casting, and the preparation method comprises the following steps: collecting physical property parameters and proportion data of each component of a steel material to be researched; calculating a control equation of a three-dimensional phase field and a solute field; writing a three-dimensional program code based on phase field method calculation; and writing program calculation result data into a Tecplot readable file, opening the Tecplot to obtain three-dimensional images of a phase field and a solute field, and combining the three-dimensional images at different calculation times to obtain the competitive growth process of the crystal grains in the molten steel. Nucleation, growth, solute diffusion and other mechanisms are introduced into numerical simulation, the microstructure of grain competitive growth in the molten steel solidification process can be truly represented, the solute redistribution phenomenon in the grain competitive growth process can be accurately predicted, and the precision of grain competitive growth prediction in the molten steel solidification process is improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical continuous casting, and particularly relates to a three-dimensional prediction method capable of realizing the growth and segregation of steel solidification dendrites. Background technique [0002] As an important material, steel is the material basis for human survival and development, and it is closely related to all fields of society. The molten steel gradually solidifies and forms under the action of cooling. This solidification process is a very complex process both macro and micro, and there is a competitive growth phenomenon of grains in this process. Competitive growth of grains is a common phenomenon in the evolution of material microstructure. Competitive growth may exist between different structures (including phases, dendrites, grains, etc.) Affect the final service performance of the product. The competition between latent heat release and surface tension during solidificatio...

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Problems solved by technology

[0005] In view of the above technical problems, the present invention provides a three-dimensional prediction method that can realize dendrite growth and segregation during solidification of steel. The phase field method selected for numerical simulation avoids tracking the complex solid-liquid interface and effectively combines the macro and micro processes of solidification. , it can simulate the competitive growth of grains and quantitatively study the effects of anisotropy and various thermophysical parameters on the competitive growth of grains. This method can reproduce the competitive growth process of grains in the solidification process of molten steel in the form of a three-dimensional image , to improve the accuracy of grain competitive growth prediction during molten steel solidification

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