Kawasaki Steel Corporation

Satoshi Shibuya

Tsuguhiko Nakagawa

Kusuo Furukawa

Takao Ogawa

Toshio Imazeki

Kiyoshi Ueda

Taichi Kukizaki

Yasuo Ichii

Toshikazu Kaihara

Itaru Hishinuma

Koshi Kuramoto

Hideyuki Nikaidoh

In order to prevent a preceding strip from being oversupplied on a delivery side of a coiling pinch rolls and to prevent a leading end of the following material from being over supplied on an entrance side of the coiling pinch rolls, to provide a strip coiling method in which a strip sent from a rolling mill is cut to a predetermined length by a strip shear (,), and a cut strip is coiled by a mandrel (,) of a coiler (,) via a coiling pinch rolls (,) disposed on a delivery side of a strip shear (,), characterized in that after a tail end of the strip coiled by the mandrel (,) via the coiling pinch rolls (,) is cut by the strip shear (,), a circumferential speed of the coiling pinch rolls (,) is higher than a transfer speed of the following material immediately after the cutting operation and lower than a coiling speed of the strip coiled by the mandrel (,).

Strip coiling method

A continuous annealing line for annealing a cold-rolled strip of a ultra-low-carbon steel comprising a heating furnace for heating the strip which is fed continuously, with or without a soaking furnace following the heating furnace, a cooling furnace in which the heated steel strip is cooled, and a carburizing/nitriding furnace disposed between the heating furnace or the soaking furnace and the cooling furnace. The carburizing/nitriding furnace may be divided into a plurality of zones, each of which is provided with control means for controlling the carburizing/nitriding atmosphere and carburizing/nitriding temperature in the zone. The continuous annealing line may further comprise a plurality of carburizing/nitriding furnaces and have an arrangement for conducting a switching between a mode in which the carburizing/nitriding furnace is used for carburizing/nitriding the steel strip and a mode in which the carburizing/cooling furnace is used for cooling the steel strip.

Continuous annealing line having carburizing/nitriding furnace

Growing community of inventors

Chiba, Japan

Satoshi Shibuya