Sumitomo Metal Industries, Inc.

Seiji Kumakura

Akihiro Yamanaka

Toshihiko Murakami

Kazuo Okamura

Sei Hiraki

Masakazu Koide

Masahito Hanao

Masayuki Kawamoto

Masahiko Oka

Kazuharu Hanazaki

Sadamichi Kaseda

Tadao Watanabe

Takasi Kanazawa

Hiroyasu Simizu

Isamu Takeuchi

Yoshinori Tanizawa

Takashi Kanazawa

A continuous casting method is demonstrated, in which a slab including a liquid coreis bulged and then reduced in its thickness with a reduction roll pairin which case, the uppermost surface of the lower rollin the reduction roll pairis located at a higher level than the lower pass lineof the slab. With this method, the slab can be efficiently reduced in its thickness without any loss of reduction force and the generation of segregation can be suppressed at the center area of the slab in the thickness direction. A continuous casting apparatus according to the invention is suitable for carrying out the continuous casting method according to the invention. A slab produced by the method according to the invention has good quality, since the segregation at the center area can be improved over the entire width in which the liquid coreis included.

Continuous casting method, continuous casting apparatus and continuously cast steel slab

A mold powder for continuous steel casting, contains CaO, SiO.sub.2 and fluoride as the main components. The ratio by weight of CaO', represented by the following equation, to SiO.sub.2 is 0.9-2.8 and the CaF.sub.2 content is about 5-60 wt. %. The powder contains Na.sub.2 O in an amount of 0-25 wt. % and C in an amount of 0-10 wt. %.

Mold powder for continuous casting and method of continuous casting

Continuous casting method and apparatus thereof

Process for continuously casting thin slabs

Method and apparatus for continuous casting of a thin slab

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Kashima, Japan

Seiji Kumakura