The effects of phosphorus on the friction, wear and 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.
The effect of phosphorus in cast iron brake blocks
Die Wirkung von Phosphor in gusseisernen Bremsbloecken
RAILWAY BRAKING. I MECH E INTERNAT. CONF. ; Sep ; 65-80
1979
16 Seiten, 8 Bilder, 5 Tabellen, 4 Quellen
Conference paper
English
Composition brake blocks - a `cast iron' alternative
British Library Conference Proceedings | 2001
|Engineering Index Backfile | 1936
|Engineering Index Backfile | 1965
|