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Hot rolled strip steel deformation resistance prediction method based on phase change

A technology of deformation resistance and hot-rolled strip steel, which is applied in the direction of rolling force/roll gap control, etc., to achieve the effect of improving rolling stability and preventing deviation of predicted rolling force

Active Publication Date: 2016-02-03
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

[0010] If the phase change is not considered when calculating the deformation resistance of the strip with phase change, it will affect the calculation accuracy of the rolling force, thereby affecting the control accuracy of the strip thickness. Even cause rolling instability and scrap

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  • Hot rolled strip steel deformation resistance prediction method based on phase change
  • Hot rolled strip steel deformation resistance prediction method based on phase change
  • Hot rolled strip steel deformation resistance prediction method based on phase change

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Embodiment Construction

[0035] A method for predicting deformation resistance of hot-rolled strip steel based on phase transformation. The method is: on the basis of the obtained rolling process data, perform regression analysis on the actual performance data for steel types. The regression data items are: actual deformation resistance and temperature, A new calculation formula for deformation resistance is established, and the curve fitting process is as follows:

[0036] Determine the calculation formula of temperature influence coefficient:

[0037] ,

[0038] In the formula: , , , : cubic curve coefficient,

[0039] T: temperature,

[0040] : temperature coefficient of deformation resistance;

[0041] Calculate the deformation resistance temperature coefficient:

[0042] Taking the predicted rack temperature T as the center point, the step size is x, and n temperature points are taken before and after, and the deformation resistance coefficient of 2n+1 points is obtained:

[0043...

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Abstract

The invention provides a hot rolled strip steel deformation resistance prediction method based on phase change. The method includes the steps that on the basis of obtained rolling process data, actual data are subjected to regression analysis according to steel types, and regression data items include actual deformation resistance and temperature; and a novel deformation resistance computational formula is established, wherein a curve fitting process is shown as follows: a temperature influence coefficient computational formula is determined and a deformation resistance temperature coefficient is computed, and the novel deformation resistance computational formula is km=(km0*kphi(phi)*kphi(phi)*kT(T)-kdelta(TiTdelta))*Kdelta. By means of the hot rolled strip steel deformation resistance prediction method based on phase change, increase of set accuracy and thickness control accuracy of rolling force is facilitated, and rolling instability and steel scraps are reduced.

Description

Technical field: [0001] The invention relates to a method for predicting deformation resistance of hot-rolled strip steel based on phase transformation. Background technique: [0002] The rolling force setting is one of the most important control parameters in the hot rolling process control system, and the deformation resistance is an important physical parameter in the rolling force calculation formula. Its size is not only related to the chemical composition of the metal, but also depends on Physical conditions for plastic deformation, such as deformation temperature, deformation speed and degree of deformation. At present, the rolling force calculation formula is as follows: [0003] [0004] Among them, the deformation resistance calculation formula is as follows: [0005] [0006] In the formula, : initial value of deformation resistance, : Deformation influence value, : deformation rate influence value, : Deformation temperature influence value, : ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/58
Inventor 谭耘宇董刚卞皓赖森贞
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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