Electromagnetic Field – Thermal Stress Coupled Analysis and Experiment Verification in High Frequency Induction Hardening

Yohei Awata
HEAT TREATMEMT DESIGN SECT. DESIGN DEPT. RADIO FREQUENCY ADMINISTRATION, Denki Kogyo Co.,Ltd.

Abstract

In designing induction heating coils that perform heating locally, the choice of frequency, electrical power, and heating time, etc., and the amount of clearance between the work piece and coil becomes important. Although induction hardening occurs within a heating time of a matter of seconds, an increase in work piece temperature also means an expansion of shapes which change the work piece and coil interval clearance.
This lecture reports on electromagnetic field-thermal stress coupled analysis performed on cylindrical shaped parts, in addition to verifications carried out with real experiments.

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