Principle induction hardening is based on the induction principle in which a primary coil inductor generates an alternating magnetic field that results in an induced alternating current in the workpiece fig. The depth of hardening is controlled by the parameters of the induction process. The hardening machine can be located in the process line. Induction hardening is a type of heat treatment in which metal parts are heated by electromagnetic induction and then quenched. Due to these advantages, the induc tion hardening process is becoming more popular to harden steel gears. This article includes the description of an induction hardening model which makes numerical simulation of the heating and cooling process possible. Induction hardening versus case hardening a comparison.
Multi response optimization of induction hardening process a new approach. Procedural aspects of induction hardening sms elotherm. Induction heating involves passing a high frequency alternating current through a suitably shaped coil to induce a current flow in the component surface. Process is dynamic and only a combination of these parameters plus optimal induction coil design can give good results f t p 0. Upon quenching, the metal undergoes martensitic transformation, significantly increasing its hardness. During induction heating, the energy to heat the part. Due to space limitation, coverage is necessarily limited in this article. This paper present a technical report of induction hardening process for medium carbon steel material with considering the effect of specimen.
Pdf multi response optimization of induction hardening. Ultraglow induction hardening is a form of heat treatment in which a steel or cast iron part is heated by electromagnetic induction, immediately followed by rapid cooling quenching. Introduction induction surface hardening is a kind of the heat. While induction hardening belongs to the thermal processes, case hardening is a thermochemical process. The induction surface hardening process consists of two consecutive stages with a short technological break between them.
Introduction to surface hardening of steels asm international. A single or multiturn inductor matching the shape of the workpiece is used as primary coil. Today we are going to discuss surface hardening which is a thermally activated process with the same aim that we want to harden the surface. Induction heating is used in a variety of heat treatment processes, such as annealing, normaliz ing, surface case hardening, through hardening, tempering. The core properties resulting from prior hardening and tempering remain unaffected by the induction process. Volume 4c induction heating and heat treatment asm international. However, several other articles in thisvolumecovermorematerialrelatedtocertain aspects of induction hardening, including. Parameters of induction gear hardening process major parameters of the process. The first step in designing an induction hardening.
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