Nippon Steel Corporation

Nippon Steel & Sumitomo Metal Corporation

Ryousuke Takata

Shuntaro Imai

Hideaki Sakurai

Daisuke Sakai

Toshiaki Mizoguchi

Shinji Nagai

Mitsutoshi Jotoku

Mitsutaka Hattori

Provided is a slab warpage detection apparatus detecting warpage of a slab drawn from a mold in continuous casting equipment. The slab warpage detection apparatus includes a pair of pressing roils that pinches the slab on a rear side of a roll segment, supporting the slab drawn from the mold, in a slab drawing direction, a movement unit that supports the pair of pressing rolls to be movable in a thickness direction of the slab, and a position detecting unit that detects positions of the pressing rolls in the thickness direction of the slab.

Slab warpage detection apparatus and method of detecting warpage of slab

A continuous-cast slab is provided where central porosity is reduced by surly crushing the slab. A method and apparatus of manufacturing the slab is also provided. The continuous-cast slab having horizontally symmetrical granular equiaxed crystals at least in the center in the thickness direction includes a first reduction dent and a second reduction dent that further dents from the bottom surface of the first reduction dent and is narrower than the first reduction dent at least on one long side surface. Such a configuration can makes it possible to achieve the continuous-cast slab of no more than 2.5&#xd7;10cm/g in a maximum porosity volume while segregation is reduced.

Continuous-cast slab, method and apparatus of manufacturing the same, and method and apparatus of manufacturing thick steel plate

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Tokai, Japan

Ryousuke Takata