Prediction method of temperature field during electromagnetic induction heating of steel plate

Abstract

The invention discloses a prediction method for a temperature field in an electromagnetic induction heating process of a steel plate. The prediction method comprises the following steps: acquiring data in the induction heating process of the steel plate; calculating the skin depth; calculating a heat exchange coefficient in the heating process; obtaining an internal heat source model of induction heating; calculating shape function N, B matrixes and a Jacobian matrix of a quadrilateral isoperimetric element by utilizing a basic finite element principle; and solving a linear equation set by adopting a one-dimensional variant-banded storage method to obtain the transient temperature field in the electromagnetic induction heating process of the steel plate. According to the prediction method, the internal heat source model is introduced in the transient temperature field to solve the linear equation set under the condition of improving the calculation efficiency, so that the transient temperature field in the electromagnetic induction heating process can be solved. The prediction method is suitable for solving the temperature field in the electromagnetic induction heating process of the steel plate by a finite element method.

Description

technical field [0001] The invention belongs to the field of temperature field prediction, in particular to a method for predicting the temperature field of a steel plate electromagnetic induction heating process. Background technique [0002] Electromagnetic induction heating refers to placing a block of metal in an alternating magnetic field, or moving in a non-uniform magnetic field, and an induced electromotive force will be generated in the metal. Since the resistance of the metal is very small, a strong induced current, namely eddy current, is caused, and the eddy current generates To consume energy, this part of the energy is converted into heat energy, which makes the metal heat up. [0003] Compared with other thermal processing techniques, electromagnetic induction heating technology has the advantages of fast heating speed, good controllability, and low energy consumption. It is widely used in steel plate heating and quenching heat treatment. The calculation of t...

AI Technical Summary

Problems solved by technology

Electromagnetic induction heating is the conversion of electromagnetic energy. There has been no exact mathematical model to predict the temperature of the transient process, so field tests are often used to determine the temperature. The temperature of the field test needs to be tested one by one, which consumes more manpower, increases costs, and has low accuracy.

[0004] Due to the actual conditions and subjective factors, the existing temperature prediction accuracy and temperature distribution information of the induction heating process are greatly limited.

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