| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat retaining control method of an induction heater for the hot to warm forging which reduces the generation of wasteful heated materials to be fed from an induction heating furnace when the normal heating operation is re-started from the stationary heat-retaining condition, increases the rate of operation of a forging line, and excellently saves the energy. SOLUTION: In the heat retaining control method of the induction heater for the hot to warm forging with the induction heater 10 having the induction heating furnace 11 to successively heat a plurality of continuously carried steel materials X by electromagnetic induction heating, the temperature condition of the steel material in the induction heating furnace 11 is set to keep the temperature distribution similar to the heating temperature-rise pattern in the normal heating operation of the induction heating furnace 11 when the steel materials X are in a stopped condition in the induction heating furnace 11.
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