Title:
FLASH-BUTT WELDING METHOD FOR RAIL STEEL
Document Type and Number:
WIPO Patent Application WO/2011/052562
Kind Code:
A1
Abstract:
A welding method is a method for subjecting a pair of track rail steels to flash- butt welding, which is provided with a preheating step for causing a current to flow for a predetermined time period in a state in which the welding surfaces of the pair of the track rail steels are forced into contact with each other, and heating the vicinity of the welding surfaces by means of resistance heating, a previous flash step for partially generating flash on the welding surfaces, and heating the welding surfaces by means of the resistance heating and electric-arc heating of the flash, and a later flash step for further generating the flash on the entire welding surfaces, and uniformly applying heat to the entire welding surfaces by means of the resistance heating and electric-arc heating of the flash, wherein the later flash speed in the later flash step is 2.1-2.8 mm/sec inclusive.
Inventors:
SAITA Kenji (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
才田 健二 (〒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)
FUKUCHI Hiroshi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
才田 健二 (〒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)
FUKUCHI Hiroshi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2010/068927
Publication Date:
May 05, 2011
Filing Date:
October 26, 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)
SAITA Kenji (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
才田 健二 (〒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)
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)
SAITA Kenji (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
才田 健二 (〒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)
International Classes:
B23K11/04; B23K11/16; E01B11/50; E01B29/44; B23K101/26; B23K103/04
Attorney, Agent or Firm:
SHIGA Masatake et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)