The effects of phosphorus on the friction, wear and sparking characteristics of cast iron brake blocks have been studied on a full-scale dynamometer. Three inertial loads were investigated which typified a coach, multiple unit and locomotive. Eight different phosphorus contents were tested between 0.05% and 7%. High phosphorus levels were usually found to increase the coefficient of friction and decrease the wear rate and spark emission. Mechanisms of braking and wear are explained qualitatively in terms of hot spot formation and heat re-distribution through the melting of iron phosphide. Some aspects of service experience with high phosphorus blocks are described with reference to cracking, insert design and the economics of service life improvements.

  • Supplemental Notes:
    • International Conference on Railway Braking, University of York, England, September 26-27, 1979.
  • Corporate Authors:

    Institution of Mechanical Engineers

    1 Birdcage Walk
    London SW1H 9JJ,   England 
  • Authors:
    • Inckle, A E
    • Beamond, T W
  • Conference:
  • Publication Date: 1979

Media Info

  • Pagination: p. 65-80

Subject/Index Terms

Filing Info

  • Accession Number: 00324890
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: 1979-11 Conf Paper
  • Files: TRIS
  • Created Date: Feb 6 1981 12:00AM