Kobe Steel, Ltd.

Tetsuo Yamada

Yoshiro Yamada

Tatsu Fujita

Atsuo Mizuta

Shinichi Shimazu

Tsugio Kaneda

Nobuyasu Hatsuoka

Noboru Yamakoshi

Heijiro Kawakami

Osamu Tsuda

Yukio Wada

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

A method for cooling a steel wire which is being drawn in a dry lubricant wire drawing operation wherein the rear portion of the die, including the backrelief portion thereof and the wire which has just been drawn to the desired dimension, are brought into direct contact with a cooling medium so as to effect forced cooling thereof, the wire thereby being cooled before the commencement of strain-aging embrittlement within the wire.

Method of cooling steel wire

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Kobe, Japan

Tetsuo Yamada