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Construction method of material deformation resistance unified model for rolling mill design

A technology of material deformation and construction method, applied in the direction of calculation, special data processing application, instrument, etc., can solve the problem of material deformation resistance model without considering extrapolation stability

Inactive Publication Date: 2012-10-24
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, in the actual production and rolling production line design process, there is no material deformation resistance model considering extrapolation stability

Method used

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  • Construction method of material deformation resistance unified model for rolling mill design
  • Construction method of material deformation resistance unified model for rolling mill design
  • Construction method of material deformation resistance unified model for rolling mill design

Examples

Experimental program
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Effect test

Embodiment 1

[0063] Prediction and extrapolation stability analysis of deformation resistance during rolling of 1Cr18Ni9Ti stainless steel. For the alloy steel sample with typical engineering composition, the thermal processing parameter range is obtained through thermodynamic calculation: the deformation temperature is 850-1200°C; the strain rate of rolling deformation is 0.2-40s -1 . Design the following thermal simulation experiments:

[0064] Deformation temperature (°C): 850, 900, 950, 1000, 1050, 1100, 1150, 1200

[0065] Rolling strain rate (s -1 ): 0.2, 0.5, 1, 2, 5, 10, 20, 40

[0066] The test results are processed according to the above unified model, and the undetermined coefficients of the deformation resistance model of 1Cr18Ni9Ti stainless steel are obtained (see Table 1):

[0067] Table 11 Undetermined coefficients of the deformation resistance model of Cr18Ni9Ti stainless steel

[0068]

[0069] The comparison between model predictions and experimental values ​​can...

Embodiment 2

[0071] Prediction and Extrapolation Stability Analysis of Cold Work Die Steel D2 Rolling Process Deformation Resistance. For the alloy steel sample with typical engineering composition, the range of thermal processing parameters obtained through thermodynamic calculation is: deformation temperature 850-1150°C; rolling deformation strain rate 0.2-40s -1 . Design the following thermal simulation experiments:

[0072] Deformation temperature (°C): 850, 900, 950, 1000, 1050, 1100, 1140

[0073] Rolling strain rate (s -1 ): 0.2, 0.5, 1, 2, 5, 10, 20, 40

[0074] The test results are processed according to the above unified model, and the undetermined coefficients of the D2 steel deformation resistance model are obtained (see Table 2):

[0075] Table 2D2 Undetermined coefficients of steel deformation resistance model

[0076]

[0077] The comparison between model predictions and experimental values ​​can be found in Figure 5 , extrapolated stability analysis results see ...

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Abstract

The invention provides a construction method of a material deformation resistance unified model with extrapolation stability in the rolling mill design process. According to the method, a large number of heat processing simulation experiment data is used as basis, and through nonlinear fitting analysis, the material deformation resistance is expressed into heat processing parameters such as deformation temperature T, deformation strain velocity and deformation quantity nonlinear function. The model is suitable for the rolling process design and a rolling production line design system of rod wires, plates and pipes in steel grades such as structure steel, pipeline steel, mold steel, and heat resistant steel, the model can precisely represent the nonlinear function relationship between deformation strain and deformation parameters of each kind of steel, meanwhile, high data extrapolation capability is also realized, and the model can be applied to the roller intensity design in a rolling production line and the computer aided design of a heat processing process.

Description

technical field [0001] The invention belongs to the field of material processing engineering, and in particular relates to a method for constructing a unified model of material deformation resistance for a rolling production line design system for structural steel, pipeline steel, die steel, heat-resistant steel, and other rods, plates, and pipes. Background technique [0002] The high temperature deformation resistance model of metal materials is the basis of thermal processing process design (including rolling, forging, extrusion, etc.). With the development and application of computer aided design technology, the high temperature deformation resistance model has become a necessary condition for computer process design. Due to the actual production process, the deformation distribution of each part of the workpiece varies greatly during the deformation process with the different geometrical complexity of the thermally processed parts. However, the test parameters are limi...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 张麦仓董建新姚志浩
Owner UNIV OF SCI & TECH BEIJING
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