High-precision prediction method for average temperature of intermediate billet of wide and thick plate

Abstract

The invention discloses a high-precision prediction method for the average temperature of intermediate billets of wide and thick plates, and relates to the technical field of steel production. Based on a temperature partial differential equation, an implicit finite difference method is adopted to establish a temperature solving equation set of the wide and thick plates, and temperature fields in the temperature waiting process of the intermediate billets with different thicknesses are calculated; temperature distribution in the thickness direction under the condition of stable temperature is obtained, and then the difference value between the surface temperature and the average temperature is obtained; due to the fact that the mechanism model is adopted to calculate the temperature field, the temperature calculation precision can be guaranteed, meanwhile, regression processing is carried out on the calculation result, the average temperature of the steel billet can be rapidly calculated according to the surface temperature value of the steel billet, and the engineering application requirement is met.

Description

technical field [0001] The invention relates to the technical field of iron and steel production, in particular to a high-precision prediction method for the average temperature of an intermediate billet of a wide and thick plate. Background technique [0002] During the hot rolling of wide and thick plates, the temperature of the rolled piece determines the deformation resistance of the metal, and is a sensitive factor affecting the mechanical parameters such as rolling force, moment, and power. The temperature control accuracy of the intermediate billet is very important for the distribution of regulations and the performance of products. . The traditional temperature model considers the boundary conditions of air cooling, rolling and high-pressure water descaling in the process of temperature prediction. The prediction results of the temperature model will gradually affect the actual value of the rolled piece temperature, causing the prediction of the force-energy model ...

AI Technical Summary

Problems solved by technology

The traditional temperature model considers the boundary conditions of air cooling, rolling and high-pressure water descaling in the process of temperature prediction. The prediction results of the temperature model will gradually affect the actual value of the rolled piece temperature, causing the prediction of the force-energy model to deviate from the actual value

[0003] The second rolling start temperature of the intermediate billet for wide and thick plates is the key to determine the subsequent rolling schedule. If the temperature deviation is too large, the preset roll gap will deviate from the thickness control benchmark, and even the rolling force will exceed the limit and the finished product cannot be rolled.

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