Induction Heating Analysis Using Current Control

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Ayaka Nakata, KOYO THERMO SYSTEMS CO.,LTD.

Abstract

In conventional carburizing heat treatment, gas carburizing is mainstream for indirect heating using Resistance Heating, which is a process that can take a long period of time spanning several tens of hours. At Koyo Thermo Systems, we have developed a “ultra rapid carburizing treatment” using the direct heating method of induction heating. This is a dramatically accelerated process of carburizing treatment.
With this “ultra rapid carburizing treatment”, a high speed rise in temperature and carburization within a small amount of time is now a possibility. However, the speed of this temperature increase, as well as heat patterns, both have a large effect on thermal processing quality. Therefore, improvements in accuracy and stabilizing quality are planned through simultaneous evaluation using analysis and verification using real machines.
In this study, as for the above, we conducted an analysis using current control, so introduce the case.

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