Method for predicting three-dimensional dendritic crystal growth under molten steel convection condition
A technology of three-dimensional dendrites and prediction methods, which is applied in the directions of instruments, chemical information database systems, and chemical data visualization, etc., can solve problems such as not considering the influence of dendrite growth and not fully reflecting the process of three-dimensional dendrite growth, and achieving Avoid the effect of high cost and improve accuracy
Pending Publication Date: 2022-08-02
NORTHEASTERN UNIV LIAONING
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[0004] At present, in many prediction methods of three-dimensional dendrite growth, the influence of molten steel convection on dendrite growth is not considered, which is quite different from the real situation, and cannot completely reflect the three-dimensional dendrite growth under the condition of molten steel convection. process
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[0029] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.
[0030] like figure 1 As shown, a method for predicting the growth of three-dimensional dendrites in the case of molten steel convection in this embodiment is as follows.
[0031] Step 1: Collect the physical property parameters of the steel to be studied and the proportion data of each component; the physical property parameters include molten steel density, molten steel viscosity, liquidus slope, melting point temperature, and molar volume.
[0032] In this embodiment, the carbon content of the low-carbon peritectic steel sample is 0.83 at.%, and the addition of solute elements will affect the appearance of the pure iron-carbon equilibrium phase diagram and change the slope of the solid-liqui...
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Abstract
The invention discloses a method for predicting three-dimensional dendritic crystal growth under a molten steel convection condition. The method comprises the following steps: collecting physical property parameters of steel to be researched and proportion data of each component; calculating control equations of the three-dimensional phase field, the solute field and the flow field; writing program codes based on calculation of a three-dimensional phase field method and an LBM method; and writing program calculation result data into a Tecplot readable file, opening Tecplot software to obtain three-dimensional images of a phase field, a solute field and a flow field under the convection condition of the molten steel, and combining the three-dimensional images at different calculation times to obtain the competitive growth process of the crystal grains in the molten steel. According to the method, the growth process of the three-dimensional dendritic crystal under the molten steel convection condition can be reproduced in a three-dimensional picture form, and the precision of three-dimensional dendritic crystal growth prediction under the molten steel convection condition is improved.
Description
technical field [0001] The invention relates to the technical field of metallurgical continuous casting, in particular to a method for predicting three-dimensional dendrite growth under the condition of molten steel convection. 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. In the continuous casting process, the molten steel will gradually cool and solidify when it passes through the mold and the cold zone. During the cooling and solidification process of molten steel, the existence of subcooling will lead to nucleation inside the molten steel. After the nucleation is completed, the grains take this as the growth center, and the primary dendrite arms and the secondary dendrite arms grow and develop, and finally dendrites are formed. During the cooling and solidification process of molten steel, there is melt convection in the internal molten steel, s...
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IPC IPC(8): G16C60/00G16C20/10G16C20/80G16C20/90G16C10/00
CPCG16C60/00G16C20/10G16C20/80G16C20/90G16C10/00Y02P90/30
Inventor 罗森郭雅琪王卫领朱苗勇
Owner NORTHEASTERN UNIV LIAONING