Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Shinichi Shimazu

Yoshiro Yamada

Tatsu Fujita

Atsuo Mizuta

Tsugio Kaneda

Tetsuo Yamada

Nobuyasu Hatsuoka

Noboru Yamakoshi

Eiji Takahashi

Yukio Wada

Ichiro Iwami

Takashi Nishiwaki

Toshikazu Nishiyama

Yutaka Ichida

Osamu Tsuda

A controlled cooling apparatus for a wire rod coiled into loops immediately after hot rolling. The coiled wire rod is transported with the loops laid substantially flat with a space of a given pitch from one another on a cooling bed. Nozzles are provided to project a cooling fluid such as forced air from below the cooling bed at an angle of from 40.degree. to 140.degree. with respect to the plane of the cooling bed to cool the coiled wire during its transportation. The nozzles are open in a transverse direction of the cooling bed with a nozzle opening area ratio of from 0.8 to 1.2, to provide uniform distribution of the cooling fluid in the transverse direction, whereby uniform cooling can be accomplished to minimize the variation in the cooling rates at densely overlapped loop portions and at sparsely overlapped loop portions.

Controlled cooling apparatus for hot rolled wire rods

A large gauge high strength steel rod having a diameter of not less than 9 mm, is produced from high carbon steel containing, by weight percent, from 0.65 to 0.90% carbon and from 0.15 to 1.5% chromium capable of being drawn without subsequent heat treatment.

High strength steel rod of large gauge

Method of producing large diameter steel rods

A method and apparatus for cooling a rod of a coil form, immediately after the hot-rolling thereof and within which the rod, whose loops are spaced a given pitch from one another, is laid flat upon a chain conveyor, and more particularly upon rails thereof, and transported therealong by means of endless chains, includes the cooling of the rod with cooling fluid or air which is introduced from below the cooling floors through means of nozzle portions formed within the bodies of the cooling floors. The method and apparatus features the arrangement and construction, including the configuration, of the nozzle portions thus formed, the cooling fluid being projected upwardly at an angle within the range of 10.degree.-70.degree. with respect to the plane of the cooling bed, and horizontally at an angle within the range of 10.degree.-150.degree. with respect to the transporting direction of the rod, towards the rod directly above the rail and chain portions of the conveyor, as well as being projected upwardly at an angle within the range of 15.degree.-75.degree. with respect to the plane of the cooling bed, and horizontally at an angle within the range of 30.degree.-150.degree. with respect to the direction of the transportation of the rod, towards the overlapped, sidewise circumferential portions of the rod. Thus, uniform cooling may be achieved over the entire length of the coiled rod.

Method and apparatus for cooling hot rolled rod

Growing community of inventors

Kobe, Japan

Shinichi Shimazu