Induction heating control manner null at the time of succeeding induction heating of the throb which the gas is heated first

摘要

PURPOSE:To decrease temp. gradient and variance in width direction, by detecting temp. distribution in width direction of material to be heated such as slab, measuring temp. difference in width direction in process from extraction from induction heating furnace to finish rolling mill being the most point on rolling, and controlling temp. due to these informations. CONSTITUTION:Material to be heated such as slab heated by heating furnace is further heated to high temp. by induction heating furnace providing computer for controlling temp., then hot rolled. Thereat, temp. distribution in width direction of slab before being charged into induction heating furnace is detected. From the information, feed foreward function of computer for correcting setting conditions of fed electric power and time in width direction, or temp. in width direction from extraction from induction heating furnace to finish rolling side is measured. From the information of the temp. distribution, temp. is controlled by controlling computer providing feed back function for correcting fed power and time in width direction of computer.