The British Steel Corporation has employed a simulative test, involving alternate heating and quenching of the rim of a rotating disc, to study the nucleation and growth of thermal fatigue cracks in steels for railway wheel and tyre applications. At a maximum temperature of 500 Cel the high temperature strength of alloy steels was found to prevent plastic deformation during cycling and thermal fatigue damage was minimal compared with carbon steels which underwent plastic deformation. At 650-700 Cel the alloy steels showed thermal fatigue cracking and the best resistance to damage was found in low strength carbon steels. At 750 Cel the alloy steels formed martensite during the quench cycle and their thermal fatigue damage increased relative to carbon steels. The overal conclusion is that low strength carbon steels represent the best type currently available for thermal fatigue resistance over a wide range of temperatures. However, the choice of low strength must be balanced by the conflicting requirement of high hardness for wear resistance.
A metallurgical study of the factors affecting thermal fatigue cracking in railway wheel and tyre steels
Eine metallurgische Untersuchung ueber Faktoren, die die Warmrissbildung durch Ermuedung von Staehlen fuer Eisenbahnraeder und Stahlreifen beeinflussen
Railway braking. I Mech E internat. conf. ; Sep ; 115-124
1979
10 Seiten, 7 Bilder, 1 Tabelle, 11 Quellen
Aufsatz (Konferenz)
Englisch
WAERMESTOSS , SCHADENURSACHENFORSCHUNG , RISSEINLEITUNG , ERMUEDUNGSBRUCH , SIMULATIONSVERSUCH , TEMPERATUR , KOHLENSTOFFSTAHL , PLASTISCHE VERFORMUNG , TEMPERATURZYKLUS , MARTENSIT , GEFUEGE (WERKSTOFF) , SPANNUNG (MECHANISCH) , KUEHLUNG , VERSCHLEISSFESTIGKEIT , EISENBAHNRAD , SCHIENENFAHRZEUG , ANLASSEN (WAERMEBEHANDLUNG)
Railway Wheel and Automotive Tyre
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