Sumitomo Metal Industries, Inc.

Tsutomu Sakashita

Takashi Kimura

Yasuhiro Maehara

Hiroshi Tomono

Tsuneo Yamada

Kunio Yasumoto

Isao Yamazaki

A method and apparatus of processing a continuously cast slab to prevent the formation of surface cracks by applying plastic strains to the surface layer of the slab in which a process of solidification is taking place. The method comprises pressing a projection against the slab surface under specified conditions prior to introducing the slab to a leveling stage.

Apparatus of processing continuously cast slabs

A continuously cast slab is processed to prevent the formation of surface cracks by applying plastic strains to the surface layer of the slab in which a process of solidification is taking place. The method comprises pressing a projection against the slab surface under specified conditions prior to introducing the slab to a leveling stage.

Method of processing continuously cast slabs

A molten steel outflow automatically controlling device comprising an infrared ray camera for detecting infrared rays emitted by a molten steel stream and slag flowing down out of a molten steel vessel such as a ladle or converter, a color monitor for converting the infrared rays emitted by the molten steel and slag into video signals with such infrared ray camera and for developing monitor picture images by color-printing the signals in two kinds, a signal discriminating device for making the two kinds of color picture images discriminating signals by the ratio of areas and a nozzle closing device for closing a nozzle for the outflow of molten steel of the molten steel vessel by such discriminating signal as is mentioned above, whereby, when the remaining amount of the molten steel in the molten steel vessel becomes small, the outflow of the slag will be detected and the nozzle for the outflow of the molten steel will be automatically closed to stop the pouring and to prevent the slag from mixing into the molten steel.

Growing community of inventors

Ibaraki, Japan

Tsutomu Sakashita