| 摘要 |
<p>PURPOSE:To perform induction heating surface hardening for hardening the surface of an iron and steel machine member and to obtain a uniform hardened layer even in the case of a machine member with complicated shape. CONSTITUTION:At the time of subjecting a material 1 to be treated having a recessed part 2 to heat treatment by means of heating by an induction heating coil 5, the recessed part 2 is coated with a highly magnetic powder material 3 consisting, e.g. of one kind among iron, silicon steel, Fe-Co alloy, and Fe-Ni alloy or a mixture of them. Then heating is applied at least to the recessed part 2 by means of the induction heating coil 5.</p> |
