Title:
A manufacturing method and a manufacture device of a rail
Document Type and Number:
Japanese Patent JP6233525
Kind Code:
B2
Abstract:
To provide a method and an apparatus for manufacturing a rail having high ductility in both a head portion and a foot portion. A heated steel rail material is hot-rolled, the temperature is adjusted by cooling the hot-rolled steel rail material, the steel rail material subjected to the temperature adjustment is processed into a rail shape by means of temperature-adjusted rolling at an area reduction ratio of 20% or more, and, in adjusting the temperature of the steel rail material, the surface portions of the steel rail material corresponding to a head portion and a foot portion of the rail shape so that the temperatures of the surface portions reach 500°C or more and 1,000C or less.
Inventors:
Okushi Kenshi
Hideo Kijima
Hiroyuki Fukuda
Yamaguchi Moriyasu
Hideo Kijima
Hiroyuki Fukuda
Yamaguchi Moriyasu
Application Number:
JP2016549924A
Publication Date:
November 22, 2017
Filing Date:
September 10, 2015
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B21B1/085; B21B45/00; B21B45/02; C21D8/00
Domestic Patent References:
| JP2001040415A | ||||
| JP2004211194A | ||||
| JP62127453A | ||||
| JP11152521A | ||||
| JP2008266675A |
Foreign References:
| US20110253268 |
Attorney, Agent or Firm:
Tetsuya Mori
Hide Tanaka Tetsu
Ichi Hirose
Toru Miyasaka
Hide Tanaka Tetsu
Ichi Hirose
Toru Miyasaka