Technical Reports

Tread Metal Buildup on Railway Wheels - Dynamometer Simulation

  • 01
  • Apr
  • 2003
AUTHOR: Joseph Kristan, Dan Stone
OFFICE: RPD
REPORT NUMBER:
SUBJECT: Evaluation
KEYWORDS: Tread Metal Buildup, Dynamometer, Railroad Wheel
ABSTRACT: Recent dynamometer tests on a composition metal shoe with a high metal powder content developed tread metal pick up during testing at TTC. Additionally, the brake shoes and wheels that developed tread metal buildup during these tests became magnetized. A dynamometer test matrix was created. The matrix included a range of brake application pressures to emulate both typical and abnormal brake function as well as water spray in an attempt to influence the resultant friction. No metal pickup was observed on any of the test wheels. Therefore, brake shoe force, moisture, and magnetism alone, or in combination, do not appear to be sufficient in them to produce wheel built-up tread based on the dynamometer tests conducted.
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