To provide a heat treatment method for a steel material, which makes a surface temperature and an interior temperature of the steel material in exact agreement with the target and performs such heat treatment as to impart the steel material an objective property, and to provide a program therefor.
The heat treatment method for the steel material comprises an operation step for assuming the surface temperature and the inner temperature toward a thickness direction of the steel material after being induction heated, from data including an electric power scheduled to be supplied to each induction heating device, a determination step for determining whether the maximum temperature of the surface of the steel material during heat treatment is not lower than a first target temperature, and the inner temperature toward a thickness direction of the steel material during the heat treatment is not higher than a second target temperature or is higher, a determination treatment step for modifying the electric power and iterating the operation step and the determination step if it does not fit the temperature condition, and a supply step for supplying the electric power used in the operation to each of the induction heating devices if it fits the temperature condition.
COPYRIGHT: (C)2004,JPO
Hiroshi Mizuno
Hiroshi Sekine
Nobutsugu Suzuki
Masatoshi Sugioka
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Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Ryo Hashimoto