An induction heat treatment method for heating and quench-hardening a treatment object through induction heating, comprising:
- a data acquiring step of heating and quench-hardening a sample of said treatment object to thereby acquire process data;
- a storing step of storing, as said process data, power supply output transition data on transition of a power supply output outputted from a power supply for induction heating to an induction coil in order to heat the sample of said treatment object in said data acquiring step, temperature transition data on transition of temperature of the sample of said treatment object, and quenching timing data for specifying a quenching timing of the sample of said treatment object;
- a checking step of checking said power supply output transition data and said quenching timing data as to validity based on said temperature transition data stored in said storing step;
- and
- a mass production step of performing heat treatment of said treatment object in accordance with said power supply output transition data and said quenching timing data stored in said storing step and checked as to validity in said checking step, wherein
- said data acquiring step includes
- a temperature controlling step of adjusting the temperature of the sample of said treatment object, and
- a quenching controlling step of adjusting said quenching timing, wherein
- said temperature controlling step has
- a heating step of heating the sample of said treatment object through induction heating,
- a temperature-measuring-for-controlling-temperature step of acquiring temperature data on a heated portion of the sample of said treatment object included in said temperature transition data, and
- a temperature adjusting step of outputting a temperature controlling signal to said power supply based on the temperature data acquired in said temperature-measuring-for-controlling-temperature step to control the power supply output to thereby adjust temperature for heating the sample of said treatment object, and wherein
- said quenching controlling step has
- a temperature-measuring-for-quenching step of acquiring temperature data on a portion away from the heated portion of the sample of said treatment object included in said temperature transition data, and
- a quenching timing adjusting step of adjusting a heating time based on the temperature data acquired in said temperature-measuring-for-quenching step and outputting a quench-starting signal.