| 摘要 |
<p>PURPOSE:To heat uniformly a steel material without generating unevenness of temps. by heating locally the low-temp. zone of the steel material before the steel material is charged into an induction heating furnace to make the temp. distribution uniform. CONSTITUTION:The temps. of a material B drawn out from a combustion furnace A in the lengthwise and widthwise directions are measured by a radiation thermometer C while the material is conveyed on a table, and the measured results are inputted to an arithmetic unit D. The requisite temp. and specified uniformity of temps. of the material B when the material is taken out from an induction heating furnace F are inputted to the arithmetic unit D, and the amt. of heat to be afforded and heating time necessary for leveling the temps. of the local low-temp. zone of the material B are calculated from said measured results. The low-temp. zone of the material B is locally heated by an induction heating coil E on the basis of the calculated values to make the temp. distribution uniform. Then the material B is introduced into the induction heating furnace F, and rapidly heated.</p> |
