Hitachi, Ltd.

Nippon Steel Corporation

Kenichi Yoshimoto

Tomoaki Kimura

Toshiyuki Kajiwara

Kenji Horii

Mitsuo Nihei

Hiromi Matsumoto

Toshio Kikuma

Yoshihiko Iida

Masayoshi Tagawa

In a continuous process for continuous casting and hot-rolling of metal sheet, off-line storage of a slab takes place in a thermally insulated storage chamber located alongside a thermally insulated zone through which the slab lengths travel in the production line between a cutter for the slab and the hot-rolling mill train. On stoppage of the hot-rolling mill train, at least one slab length is transferred laterally to the off-line thermally insulated storage chamber. To improve ductility, an induction heating stage is combined with a subsequent temperature-maintaining stage in the furnace for homogenization of temperature within the slab. Both these stages are performed on the slab at its casting thickness.

Method and apparatus for continuous casting and hot-rolling

A method and an apparatus for controlling a rolling mill which dampens a snake motion of a material being rolled is disclosed. According to this method and apparatus, an amount corresponding to the snake motion of the material being rolled is detected, and the value thus detected is added to a value corresponding to a differentiated value of said detected value. A control operation is applied to the material being rolled to thereby control the snake motion of the material.

Method and apparatus for controlling snake motion in rolling mills

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Hitachi, Japan

Kenichi Yoshimoto