Title:
METHOD OF COOLING WELDED RAIL SECTION, DEVICE FOR COOLING WELDED RAIL SECTION, AND WELDED RAIL JOINT
Document Type and Number:
WIPO Patent Application WO/2010/116680
Kind Code:
A1
Abstract:
A method of cooling a welded rail section, the method comprising: a first column-section cooling step for cooling a region to be cooled of a column section of the welded rail section, the cooling being performed in at least a part of the temperature range in which the transformation from austenite to pearlite completes; a second column-section cooling step for cooling the region to be cooled of the column section after the entire column section of the welded rail section is transformed to the pearlite; a foot-section cooling step for cooling a foot section of the welded rail section; and a head-section cooling step for cooling a head section of the welded rail section. In the method, if the time period of cooling in the first column-section cooling step and the second column-section cooling step is t (min), the k-value satisfies the expression -0.1t + 0.63 ≤ k ≤ -0.1t + 2.33.
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Inventors:
KARIMINE, Kenichi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
狩峰健一 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
UEDA, Masaharu (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
上田正治 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
狩峰健一 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
UEDA, Masaharu (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
上田正治 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
Application Number:
JP2010/002303
Publication Date:
October 14, 2010
Filing Date:
March 30, 2010
Export Citation:
Assignee:
NIPPON STEEL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
新日本製鐵株式会社 (〒71 東京都千代田区丸の内二丁目６番１号 Tokyo, 〒1008071, JP)
KARIMINE, Kenichi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
狩峰健一 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
UEDA, Masaharu (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
新日本製鐵株式会社 (〒71 東京都千代田区丸の内二丁目６番１号 Tokyo, 〒1008071, JP)
KARIMINE, Kenichi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
狩峰健一 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
UEDA, Masaharu (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
International Classes:
C21D9/04; B23K31/00; C21D9/50; E01B11/46; B23K101/26
Attorney, Agent or Firm:
SHIGA, Masatake et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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