Jfe Steel Corporation

Other

Kabushiki Kaisha Toshiba

Nkk Corporation

Hiroshi Sekine

Sadakazu Masuda

Yoichi Motoyashiki

Yoshitsugu Iijima

Kiyoshi Nakano

Hiroshi Mizuno

Noritsugu Suzuki

Masatoshi Sugioka

Masaaki Yamamoto

Kazuyuki Sato

Yasuhiro Fujii

Satoshi Murata

Nobuhiro Tazoe

Yoshimichi Hino

Isao Imai

Kenichi Ide

Toru Minote

Hisashi Sato

Shozo Ikemune

Yasushi Dodo

Shigeki Narushima

Shuichi Yamashina

Takumasa Terauchi

Toshihiko Obata

Hisatomo Eda

Tetsuji Doizaki

Manabu Sonobe

Masaru Miyake

Shozo Azuma

The present invention provides a method of manufacturing a steel product, comprising the step of heat treating a steel product having been subjected to quenching or accelerated cooling on a hot rolling line after hot rolling to pass the steel product through a plurality of induction heating apparatuses, which are installed on the hot rolling line, three times or more. The method of the present invention makes it possible to uniformly heat treat the steel product with high productivity.

Process for producing steel product and production facility therefor

A heat treatment apparatus includes a plurality of induction heating devices which heat a steel product, a correctional device which corrects the steel product, a computing device which computes supply predetermined electric power which is supplied to the induction heating device, on the basis of a size of the steel product, a conveying speed of the steel product, a heating target temperature of the steel product, and a predetermined temperature of the steel product at the previous stage of the induction heating devices, and a power supply unit which supplies the supply predetermined electric power computed by the computing device to the induction heating devices, and the computing device which computes electric power for uniform heating processing on the steel product or electric power for surface layer heating processing on the steel product.

Heat treatment apparatus, heat treatment method, medium on which heat treatment program is recorded, and steel product

A material to be shaped is reduced and formed by bringing dies with convex forming surfaces, when viewed from the side of the transfer line of the material close to the transfer line from above and below the material in synchronism with each other, while giving the dies a swinging motion in such a manner that the portions of the forming surfaces of the dies, in contact with the material are transferred from the upstream to the downstream side in the direction of the transfer line.

Plate reduction press apparatus and methods

C-shaped inductors for induction heating a heated steel material that is carried via table rollers. Each C-shaped inductor includes a C-shaped iron core having a pair of legs facing each other by sandwiching a gap through which the heated steel material passes, and heating coils wound around the pair of legs of the C-shaped iron core. A ring-shaped iron core for restricting induced currents generated in the heated steel material is disposed near the C-shaped inductors, and the heated steel material passes through the gap of each C-shaped inductor.

Induction heater with a unit for preventing generation of sparks

Making method of hot-rolled steel sheet comprises rough rolling a slab into a rough bar, heating the rough bar, guiding the rough bar with side guides and finish rolling the rough bar. The apparatus comprises a rough rolling mill, a heating device for heating the rough bar, side guides for guiding the rough bar and a finish rolling mill.

Method for making hot-rolled steel sheet and apparatus therefor

Growing community of inventors

Fukuyama, Japan

Hiroshi Sekine