Induction Hardening

Induction hardening is a surface heat-treating process.  A ferrous metal workpiece (from medium to high-carbon content) is heated by means of a high frequency electromagnetic field.  The heated workpiece is then quickly quenched to produce a hardened structure.  This process is generally used to harden the surface only, but through-hardening is possible, depending on workpiece thickness and equipment limitations.

Process Characteristics

Produces surface hardening on ferrous workpieces.  (Carbon content from 0.40% to 1.00%)
Is rapid and easily controlled
Heating results from high frequency, induced eddy currents
Workpieces may be rotated to provide uniform heating/quenching
Can be used for through-hardening
Produces little distortion or scaling
May selectively harden workpiece

BACK

Information provided is from Manufacturing Processes Reference Guide by Robert H. Todd, Dell K. Allen, and Leo Alting.--1st ed. Published by Industrial Press Inc., 1994.