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Plate shape correction method during steel plate quenching based on model control

A model control, steel plate technology, applied in the direction of heat treatment process control, manufacturing tools, heat treatment equipment, etc., can solve problems such as warpage of steel plates, generation of temperature stress and structural stress, uneven cooling of steel plates, etc.

Inactive Publication Date: 2010-12-22
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Due to the difference in material and specifications of the thick plate, the cooling of the upper and lower sides of the steel plate is often uneven, resulting in temperature stress and structural stress, causing the steel plate to warp

Method used

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  • Plate shape correction method during steel plate quenching based on model control
  • Plate shape correction method during steel plate quenching based on model control
  • Plate shape correction method during steel plate quenching based on model control

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Embodiment Construction

[0040] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] refer to figure 1 , figure 1 A main flowchart 100 of the present invention is shown, including:

[0042] 101. Establish the surface structure distribution model of the steel plate, and output the fraction ratio of martensite on the upper and lower surfaces of the steel plate.

[0043] The warping amount and size parameters of the steel plate are obtained and input into the established distribution model of the steel plate surface structure, and the fraction ratio of martensite on the upper and lower surfaces of the steel plate is calculated and output.

[0044] 102. Establish a steel plate surface temperature model based on the steel plate surface structure distribution model.

[0045] 103. The steel plate surface temperature model outputs the surface temperature of the steel plate, and obtains the cooling rate ratio...

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Abstract

The invention discloses a plate shape correction method during steel plate quenching based on model control. Firstly, according to the warping direction and warping amount of the steel plate shape after actual quenching, calculating the difference of the steel plate tissue distribution by utilizing an established steel plate surface tissue distribution model; then obtaining the cooling speed difference of upper and lower surfaces of the steel plate by utilizing an established steel plate surface temperature model according to the tissue distribution difference of the upper and lower surfaces of the steel plate; and finally, calculating the heat transfer coefficient ratio of the upper and lower surfaces of the steel plate by utilizing an established water volume optimization model and regulating the water volume and distribution of subsequent steel plates quantitatively to control the plate shape.

Description

technical field [0001] The invention relates to the field of quenching in the iron and steel industry, in particular to a method for correcting plate shape during quenching of steel plates based on model control. Background technique [0002] The quenching process of steel plates, especially thick plates, is a key process to adjust the microstructure and properties of materials, and is crucial to the production of high-strength thick plates with stable mechanical properties and good shape. The quenching machine is the key equipment, and generally adopts the cooling method of spraying up and down and spraying. Due to the difference in material and specifications of the thick plate, the cooling of the upper and lower sides of the steel plate is often uneven, resulting in temperature stress and structural stress, causing the steel plate to warp. [0003] Patent CN200320103136.2 discloses a pressure quenching device for thin-gauge bullet-proof steel plates. The device uses a st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D11/00C21D1/18
Inventor 焦四海闫博
Owner BAOSHAN IRON & STEEL CO LTD
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