Nippon Steel Sumitomo Metal Corporation

Nobuhiro Takagi

Shigeru Ogawa

Yoshihiro Serizawa

Tetsuo Kishimoto

Noriyuki Hishinuma

Yasuhiro Nishiyama

Isao Yoshii

Hitoshi Nikaidoh

Shinji Ida

The present invention provides a method of cooling a hot-rolled steel strip which has passed through a finishing rolling, including: cooling the hot-rolled steel strip from a first temperature of not lower than 600&#xb0; C. and not higher than 650&#xb0; C. to a second temperature of not higher than 450&#xb0; C. with cooling water having the water amount density of not lower than 4 m/m/min and not higher than 10 m/m/min, wherein with respect to the area of the target surface, the area of a portion where a plurality of spray jets of the cooling water directly strikes on the target surface is at least 80%.

Cooling device of hot-rolled steel strip

Cooling method of hot-rolled steel strip

Growing community of inventors

Tokyo, Japan

Nobuhiro Takagi