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A Calculation Method of High Precision Boron-Containing Steel Hot Rolling Force

A calculation method and technology of rolling force, applied in the direction of rolling force/roll gap control, etc., can solve the problems of reducing the rolling stability of the rolling line, the mismatch of the second flow rate, and the reduction of the thickness accuracy of the strip exit, so as to improve the rolling force. Control stability, improve finish rolling thickness accuracy, and increase output

Active Publication Date: 2017-09-12
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase of rolling force deviation affects the roll gap setting of F1-F7 stands, and then affects the exit thickness of each stand, resulting in the mismatch of second flow rate between each stand, which reduces the rolling stability of the rolling line; The outlet thickness accuracy is also reduced

Method used

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  • A Calculation Method of High Precision Boron-Containing Steel Hot Rolling Force
  • A Calculation Method of High Precision Boron-Containing Steel Hot Rolling Force

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Experimental program
Comparison scheme
Effect test

Embodiment

[0049] see figure 1 , Known finish rolling entry conditions, steel grade: SPHCB; carbon equivalent: 0.095 (boron content 0.0008%); intermediate billet size [mm]: 40×1270 (thickness×width); final rolling size [mm]: 2.75× 1253 (thickness×width); entrance temperature: 1050℃; FDT calculation temperature: 880℃; F7 threading speed: 10.0m / s; F1-F7 work roll diameter [mm]: 755,763,770,682,685,664,675; F1-F7 rolling calculation Force [ton], see Table 3: Finish rolling F1-F7 to calculate the rolling force.

[0050] table 3

[0051]

F1

F2

F3

F4

F5

F6

F7

One time calculation

2188.3

2053.9

1884.2

1613.6

1329.9

1112.3

809.50

Second calculation

2155.4

2012.8

1850.2

1605.5

1296.6

1103.4

808.69

[0052] Calculation of finishing rolling model before application without improvement:

[0053] It is known that the entry conditions of the finishing rolling are the same as above, the finishing rolling calculates the F1-F7 rolling force [ton], see Table 4 the finishing rolling F1-F7 to calculate the rolling force.

[00...

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Abstract

The invention relates to a method for calculating the rolling force of high-precision boron-containing steel hot rolling. After dividing different steel types, widths and thicknesses, CoefKm[iFmStand][7]× The fCc_B influence coefficient data item is involved in the calculation, and the value of the B content influence coefficient CoefB_N[i][j] is added to the calculation on the basis of the calculation of the deformation resistance, and the fKm=fCoeffCc×fCon×fFun(fCc_C,T,fEp,fEpV)×{ CoefB_N[i][j]}; the advantages of the present invention are: effectively improve the final rolling thickness accuracy, in 2013, the thickness accuracy of boron-containing strip steel was increased from 93.2% to 99.0%; the rolling stability was improved, and the output was increased Big boost.

Description

Technical field [0001] The invention relates to a method for calculating the rolling force of a high-precision boron-containing steel hot rolling, in particular to a method for calculating the rolling force of a seven-stand hot continuous rolling strip. Background technique [0002] The rolling force model is the core of the hot tandem rolling mathematical model in the process control system, and the deformation resistance prediction model is the main body of the rolling force model. Therefore, the prediction accuracy of the deformation resistance model directly determines the prediction accuracy of the entire hot tandem rolling mathematical model and the thickness hit rate of the final product strip. [0003] At present, the hot rolling finishing rolling force model is based on the Shida Shigeru deformation resistance model, which is widely used. It is a simple, practical and high-precision rolling force calculation formula. It is used in the design of rolling machinery, the formu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/58
Inventor 黄士博何士国张吉富于斌
Owner ANGANG STEEL CO LTD