Simulation method for macrosegregation of continuous casting slab

A simulation method and macrosegregation technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as high cost, unrealizable production cost, and inability to correctly reflect the actual situation.

Inactive Publication Date: 2018-10-12
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limitation of experimental conditions, only the solute distribution in a small area of ​​the continuous casting slab can be obtained, which cannot correctly reflect the actual situation, and the cost is high
For the influence of process parameters on the segregation of an element, it cannot be realized due to the problem of production cost

Method used

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  • Simulation method for macrosegregation of continuous casting slab
  • Simulation method for macrosegregation of continuous casting slab
  • Simulation method for macrosegregation of continuous casting slab

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Simulation methods for macro-segregation of continuous casting slabs, such as figure 1 shown, including the following steps:

[0082] Step 1: Establish the geometric model of the continuous casting slab: Based on the size of the continuous casting slab under actual working conditions, taking into account the structural symmetry of the continuous casting slab, take a quarter of its section for research, and establish a three-dimensional slice model of the continuous casting slab. The size is length×width×thickness, and the specification of the continuous casting slab is generally expressed as length×width, and the present invention is applicable to all continuous casting slabs. But the value of its thickness should be within 5-10mm.

[0083] Step 2: Divide the mesh model: Divide the 3D slice model established in step 1 into a mesh to obtain a 3D mesh model.

[0084] It should be noted that the present invention is designed for the flow of molten steel, so hexahedral gr...

Embodiment 2

[0135] This embodiment is a specific application based on Embodiment 1:

[0136] (1) Grid model establishment

[0137] Geometric models can be established in SOLIDWORKS software, such as figure 2 The three-dimensional slice model of the continuous casting slab is established as shown, in which, 1 is the crystallizer, 2 is the secondary cooling zone, 3 is the casting direction, 4 is the center line of the wide face, and 5 is the cross-sectional size of the slice, considering the structure of the continuous casting slab Symmetry, take its 1 / 4 section for research, its size is 640mm×110mm×6mm, save the model in igs format; import the model in igs format into the Meshing module in ProCAST, divide the surface mesh and volume mesh in turn to get A schematic diagram of the mesh of the model, such as image 3 As shown, the grid type is a hexahedral grid. Finally, check the grid quality. It is required that the grid quality of all grids should be greater than 0.4. Repair low-quality...

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Abstract

The invention relates to a simulation method for macrosegregation of a continuous casting slab. The method comprises the following steps: building a continuous casting slab three-dimensional slice model according to the length x width x thickness of the continuous casting slab, dividing the three-dimensional slice model into grids to obtain a three-dimensional grid model; obtaining thermodynamic data according to solute compositions of the continuous casting slab steel grade and the mass percentage; obtaining a heat transfer boundary condition, a molten steel initial condition and a flow boundary condition of a continuous casting slab model; and constructing a solidification and heat transfer model and a molten steel flow model of the continuous casting slab according to the thermodynamicdata, the heat transfer boundary condition, the molten steel initial condition and the flow boundary condition, so as to calculate and obtain solute element concentrations, as the following formulas,at each point of a section of the continuous casting slab. The simulation method for the macrosegregation of the continuous casting slab provided by the invention can obtain the macrosegregation conditions of different elements in the steel, the solute distribution rule of the whole section of the casting slab and the like, provide reliable data support for the actual production process, and optimize process parameters of a continuous casting operation, thereby improving the quality of the continuous casting slab.

Description

technical field [0001] The invention relates to a simulation method for macro-segregation of continuous casting slabs, belonging to the field of continuous casting process simulation. Background technique [0002] The molten steel is completely solidified through the crystallizer, the secondary cooling zone and the straightening section. However, during the solidification process, due to improper design of the cooling process, various defects often appear, and segregation is the most common and least difficult in the continuous casting process. Therefore, it is particularly important to study the formation mechanism of segregation during the solidification of continuous casting slabs. The segregation behavior has an important influence on the microstructure and mechanical properties of the continuous casting slab, and can cause defects such as shrinkage porosity, internal cracks and stress concentration in the slab, such as hot brittleness caused by sulfur segregation, and c...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/08
Inventor 郑淑国王鑫孟祥宁朱苗勇
Owner NORTHEASTERN UNIV
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