Kawasaki Steel Corporation

Goji Katsushima

Yuji Shimoyama

Fumiya Yanagishima

Takeo Ohnishi

Hideo Sunami

Yukio Ida

Takeo Fukushima

Munetoshi Suzuki

A steel strip continuous annealing apparatus comprising: a steel strip feeder; a heating-soaking zone for heating and soaking a steel strip at a predetermined temperature; a first cooling zone for rapidly cooling the steel strip at a predetermined cooling rate; a second cooling zone for slowly cooling the steel strip or holding same at a predetermined temperature; a third cooling zone for cooling the steel strip to substantially room temperature; and a steel strip carryout device; wherein the first cooling zone incorporates therein forcible cooling means, the second cooling zone incorporates therein hot-cold change-over means and the third cooling zone incorporates therein forcible cooling means, while said steel strip continuous annealing apparatus further comprises: means for directly bypassing the steel strip from the heating-soaking zone through a first bypass passageway to the second cooling zone; and means for directly bypassing the steel strip from the first cooling zone through a second bypass passageway to the steel strip carry-out device; so that the steel strips different in dimensions and required heat cycle can be efficiently annealed.

Steel strip continuous annealing apparatus

A steel strip continuous annealing apparatus comprising: a steel strip feeder; a heating-soaking zone for heating and soaking the steel strip at a predetermined temperature; a first cooling zone for rapidly cooling the steel strip at a predetermined cooling rate; a second cooling zone for slowly cooling the steel strip or holding same at a predetermined temperature; a third cooling zone for cooling the steel strip to substantially the room temperature; and a steel strip carry-out device; wherein the first cooling zone incorporates therein forcible cooling means, the second cooling zone incorporates therein hot-cold change-over means and said forcible cooling means incorporated in the first cooling zone is provided thereon with self-cooling means; so that steel strips of various grades of steel different in required heat cycle to be applied thereto can be efficiently and stably annealed.

Growing community of inventors

Chiba, Japan

Goji Katsushima