IGBT induction hardening and its application in Singapore

Abstract

Induction hardening has come a long way. Whilst the vacuum tube power supply is still commonly used in industries, IGBT power supply is fast gaining industrial acceptance. In terms of power efficiency, the IGBT technology is arguably the most advanced, despite its demand for sound technical know-how on the combination of capacitances and inductances to achieve optimal effects. This paper aims to provide a brief review of the induction hardening process and the relationship of induction hardening parameters. This paper will demonstrate the importance of power density, frequency and traverse speed with particular reference to the experimental study on induction hardening of the AISI 4140 material. With these experimental data, two Master curves were achieved as an approach to ensure sound industrial treatment. This takes the form of determining the threshold requirement of power density to obtain maximum surface hardness. Finally, it will provide five case studies of industrial experiences in Singapore.