| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an apparatus for heat treating steel plates with the use of an induction heating device of high efficiency, which uniformizes temperature distribution across short transverse and long transverse directions, and does not cause defects in quality by setting an upper limit to the surface temperature. SOLUTION: The apparatus for heat treating the steel plates which disposes several solenoid type induction heating devices (hereafter referred to as inductors) in series, is characterized by setting the upper limit for quantity of raising temperature on each inductor, so that the surface temperature of the steel sheet may not exceed the target upper limit temperature which is lower than the magnetic transformation temperature (Curie temperature).</p> |
