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

Abstract

The invention discloses a method for predicting the temperature field of the electromagnetic induction heating process of steel plates, which includes the following steps: collecting steel plate induction heating process data, calculating the skin depth, calculating the heat transfer coefficient of the heating process, obtaining the internal heat source model of the induction heating, and using finite elements. The basic principle is to calculate the shape function N, B matrix and Jacobian matrix of the quadrilateral isoparametric unit, and use the one-dimensional variable bandwidth storage method to solve the linear equations to obtain the transient temperature field of the steel plate electromagnetic induction heating process. While improving calculation efficiency, the present invention brings the internal heat source model into the transient temperature field to solve the linear equations, thereby realizing the solution of the transient temperature field in the electromagnetic induction heating process. The invention is suitable for solving the temperature field of the steel plate electromagnetic induction heating process using the 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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