Temperature calculation method during stacking of steel plates

Abstract

The invention relates to a temperature calculation method during stacking of steel plates, and belongs to the technical field of roller hearth type heat treatment furnace model control. The method includes: S1, reading the number n of steel plate blocks stacked into a furnace; S2, dividing the steel plates into an upper steel plate, a middle steel plate and a bottom steel plate according to the positions of the steel plates, and respectively calculating the surface heat flux density of each steel plate; enabling the upper surface of the upper steel plate to exchange heat with the hearth, and enabling the lower surface of the upper steel plate to be in contact with the other steel plate for heat conduction; enabling the upper and lower surfaces of the middle steel plate to be in contact with other steel plates for heat conduction; enabling the upper surface of the bottom steel plate to be contacted with the other steel plate for heat conduction, and enabling the lower surface ofthe bottom steel plateto exchange heat with the hearth; and S3, after obtaining the surface heat flux density of the steel plate, dividing grids, and calculating the section temperature distribution of each steel plate according to a steel plate difference equation. The method for calculating the temperature of the steel plates is provided according to the stacking production condition during heat treatment of the thin plates, and the production efficiency and the model calculation precision of the thin plate stacking heat treatment furnace are improved.

Description

technical field [0001] The invention belongs to the technical field of model control of a roller hearth heat treatment furnace, and relates to a method for calculating the cross-sectional temperature of steel plates during stacked production of thin steel plates. Background technique [0002] Heat treatment products are high value-added products with strict requirements on product quality, especially high-strength sheet tempering heat treatment, which requires high temperature uniformity and longer holding time than other heat treatment processes, resulting in low production efficiency of heat treatment furnaces. For thin steel plates, the production method of stacking several steel plates of the same process into the furnace can greatly improve the production efficiency of the heat treatment furnace. However, the stacking of steel plates will reduce the heat transfer rate of the inner steel plates, and the outlet pyrometer cannot measure its temperature. Therefore, the tem...

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a method for calculating the temperature of the stacked steel plates. For the calculation of the heat flow on the surface of the steel plates at different positions during the stacked production of thin steel plates in a roller hearth heat treatment furnace, different surface heat flow calculation methods are used. The heat conduction calculation of the contact surface of the steel plate is introduced to solve the heat transfer calculation problem of the contact surface of the two steel plates and improve the calculation accuracy of the model

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