Nippon Steel Corporation

Ryoji Terakado

Munetsugu Matsuo

Norio Anzawa

Satohiro Hayami

Soichi Izumi

Norimasa Kamii

Ituo Takahashi

Gen Yoshida

Choshiro Yamamoto

Masaru Iwasa

A vertical continuous annealing furnace has two furnace covers vertically spaced away from each other. Each furnace cover is laterally slidable with respect to the furnace proper and has two long narrow openings through which strip is passed. There is a relatively small pre-chamber between the first furnace cover above and the second furnace cover below. The space below the second furnace cover constitutes a heating chamber. A partition extends from the undersurface of the second furnace cover to near the bottom of the furnace, dividing the heating chamber into a heating zone and a soaking zone. In charging and discharging the strip, the two furnace covers are alternately opened and closed, thereby keeping the heating chamber out of exposure to the outside air.

Vertical continuous annealing furnace and its operating method

A slab or ingot of ferritic stainless steel for deep drawing applications is subjected to hot rolling, coiled at 450.degree. to 750.degree. C, subjected to warm rolling without cooling the coil by a rolling mill installed separately from the hot strip rolling mill, subjected to continuous annealing, and subjected to cold rolling and final annealing.

Method for the manufacture of a ridging-free ferritic stainless steel

A method of controlling the shape of rolled objects in the rolling of plate, sheet, strip and the like through the adjustment of the quantity of a crown made on the rolling roll by heating the inside of the center hole made along the center axis of the rolling roll.

Method of and apparatus for controlling the shape of rolled objects in

Growing community of inventors

Muroran, Japan

Ryoji Terakado