Technical Reports

The Wear Behavior of High Rails Tested in the First Metallurgy Experiment, 0 to 135 MGT

  • 01
  • Sep
  • 1981
AUTHOR: M. B. Hargrove, F. S. Mitchell, R. K. Steel, R. E. Young
SUBJECT: Facilities & Test Equipment, Track/Train Interactions
KEYWORDS: High Silicon, Standard Carbon, Head Hardened, Chrome Molybdenum, Position-in-Curve, Tie Plate Cant, Profilometer, Chemistry, Curvature
ABSTRACT: In the first rail metallurgy experiment, covering the period from September 1976 to September 1977, 135 million gross tons (MGT) of traffic were accumulated on the Facility for Accelerated Service Testing (FAST) track under two widely different lubrication regimes. The first regime of poor lubrication existed for the first 40-45 MGT while a second regime of generous lubrication followed through to the end of the first experiment. This report presents wear results for the high rail only in FAST Sections 03 and 13. In the poorly lubricated regime (a) chrome molybdenum (CrMo) and head- hardened (HH) rail exhibited the greatest resistance to gage face wear and head area loss, (b) high silicon (HiSi) and fully heat-treated (FHT) rail were significantly less resistant to gage face wear and head area loss although. FHT rail exhibited somewhat better resistance to head height loss than did HH rail, (c) the gage face wear behavior was strongly dependent on equivalent carbon content, and (d) the 1:14 tie plate cant produced approximately 20% more gage face wear and head area loss, on the average, for all metallurgies than did either the 1:30 or 1:40 tie plate cants. In the more generously lubricated regime, (a) a strong metallurgy:lubrication interaction occurred such that relative to standard rail all other metallurgies behaved more alike and (b) the strength of the tie plate cant effect diminished although the. 1:40 cant still produced the lowest gage face wear and head area loss.
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