MANUFACTURE AND PROPERTIES OF DEEP HEAD HARDENED RAIL

Slack-quenched rails made by Nippon Steel have made an important contribution to reducing the maintenance cost of railroads. Recently, the number of companies that use heavy lubrication and grinding of rail heads to improve rail life has been increasing. Thus, depending on the conditions under which the track will be used, rails with various types of hardness and a much deeper hardened layer are in great demand. To satisfy this demand, Nippon Steel has developed a new, heat-treated rail called the deep head hardened (DHH) rail, which can be produced by in-line direct heat treatment with a special cooling system designed by Nippon Steel. Features of DHH rail are as follows: (a) various grade types of hardness, (b) a deep and uniformly hardened layer in the rail head, and (c) high weldability. The construction of these rails has been completed and tested. The new rail wll be available late in 1987.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1988/1174/1174-005.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=MANUFACTURE+AND+PROPERTIES+OF+DEEP+HEAD+HARDENED+RAIL&author=H.+Yoshitake&author=Y.+Makino&author=K.+SUGINO&author=H.+Kageyama&author=T.+Suzuki&author=K.+Fukuda&author=T.+MIYATA&publication_year=1988
• Availability:
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1174, Rail Replacement and Maintenance Management. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Yoshitake, H
  • Makino, Y
  • SUGINO, K
  • Kageyama, H
  • Suzuki, T
  • Fukuda, K
  • MIYATA, T
• Publication Date: 1988

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 50-56
• Monograph Title: Rail Replacement and Maintenance Management
• Serial:
  • Transportation Research Record
  • Issue Number: 1174
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Hardness; Maintenance management; Manufacturing; Properties of materials; Reduction (Chemistry); Welding
• Uncontrolled Terms: Maintenance costs; Weldability
• Old TRIS Terms: Deep head hardened rail; Reduction
• Subject Areas: Highways; Maintenance and Preservation; Materials; Railroads;

Filing Info

• Accession Number: 00483818
• Record Type: Publication
• ISBN: 0309047145
• Files: TRIS, TRB
• Created Date: May 31 1989 12:00AM