Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Sega Corporation

Yasuhiro Nishiyama

Shigeru Ogawa

Yoshihiro Serizawa

Ryuji Yamamoto

Masahiro Doki

Hironori Ueno

Tetsuo Kishimoto

Noriyuki Hishinuma

Isao Yoshii

Hitoshi Nikaidoh

Shinji Ida

Nobuhiro Takagi

Toru Ohara

Jun Matsunaga

Tsuyoshi Higo

Shinya Yamauchi

Kentaro Nemoto

Kazuo Komuro

Taisuke Iwaki

Kunihiko Wakatsuki

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

The present invention relates to a method of arranging and setting spray nozzles in a cooling apparatus comprising a plurality of pairs of constraining rolls for constraining and conveying a hot steel plate and one or more lines of spray nozzles between the pair of constraining rolls, each line having a plurality of spray nozzles and is disposed in a direction perpendicular to processing, and to the cooling apparatus and the method of cooling. The invention is characterized in that the spray nozzles are arranged such that a distribution of values &#x222b;Pbetween two edges of the steel plate in the direction perpendicular to processing is not less than 80% of its highest value, with P being cooling water impact pressure on the cooling surface, &#x222b;Pbeing the value of n power of P integrated in the processing direction between the pairs of constraining rolls, and 0.05&#x2266;n&#x2266;0.2.

Method of arranging and setting spray cooling nozzles and hot steel plate cooling apparatus

The present invention relates to an apparatus for cooling a hot steel plate which is processed and constrained by constraining rolls and a method of arranging and setting spray nozzles enabling uniform cooling in a direction perpendicular to processing. In the apparatus and method of the invention, the spray nozzles are arranged so that a value of n power of the impact pressure of the cooling water on the cooling surface integrated in the processing direction between pairs of constraining rolls becomes within &#x2212;20% of the highest value in the direction perpendicular to processing, where 0.05&#x2266;n&#x2266;0.2.

An apparatus for controlled cooling of hot steel plate while constraining and conveying the plate by constraining rolls horizontally which is inexpensive and enabling continuous control of the cooling ability over a broad range, that is, a cooling apparatus for spraying hot steel plate hot rolled and transferred between pairs of constraining rolls with cooling water from pluralities of lines of spray nozzles so as to cool the same, which apparatus has lines of gentle cooling spray nozzles and lines of strong cooling spray nozzles with different orifice shapes and enables continuous control of the cooling ability over a broad range due to the fact that a maximum cooling water impact pressure integrated value of the lines of gentle cooling spray nozzles and a minimum cooling water impact pressure integrated value of the lines of strong cooling spray nozzles are continuous.

Cooling apparatus of hot steel plate, cooling method of hot steel plate, and program

A game machine which uses play items such as cards and which enables the player to play a game seriously and to concentrate in the game so as to win over the opponent is provided according to the present invention. The game machine controls the progress of a game based on data read out from the play items, and issues a new play item for each game played. The game machine includes means for setting a game fee at a discount rate in accordance with the number of previous consecutive wins for the player to try a next post-victory bonus game after winning one game, and means for determining the number of games played based on the outcome (win or loss) of the player's previous games and for issuing new play items collectively to the player by the number corresponding to the determined number of games played.

Gaming machine, game system, its program, and recording medium

Growing community of inventors

Tokyo, Japan

Yasuhiro Nishiyama