A Relation between the Shape of High Frequency Heating Coil and the Temperature Distribution of Specimen in Thermal Fatigue Test

Abstract

On the high frequency heating apparatus used for thermal fatigue tests, the relation between the shape of heating coils and the temperature distribution of specimens was experimentally examined for SUS 304 stainless steel. This report describes the relation between heating coil dimensions and heating rate, the most ideal coil shape for various specimen types, and the effects of temperature range and specimen shape on temperature distribution.
The results obtained are as follows:
(1) The heating rate increases with decreasing distance from specimen surface to heating coil and with increasing coil tube diameter.
(2) For the general cylindrical and hour glass type specimens, the most ideal coil shapes are a separate type and a parallel type coil, respectively, as judged from the point of temperature distribution.