Treatment of railway wheels

Details Treatment of railway wheels Treatment of railway wheels

C - Chemistry, Metallurgy

21

D

C21D 9/34 (2006.01)

Patent

CA 2691713

A method of treating a steel railway wheels to form a required distribution of compressive residual stress in the rim. In general terms the wheel heated and then quenched from the plate towards the rim. The wheel is first heated to form austenite throughout the plate and rim portions. The wheel is then cooled to form bainite/martensite in the plate portion. The wheel is cooled to form bainite/martensite in an inner portion of the rim. The wheel is cooled to form bainite/martensite in an outer portion of the rim.

L'invention porte sur un procédé de traitement de roues de wagon de chemin de fer en acier pour former une répartition requise de contrainte résiduelle de compression dans la jante. En termes généraux, la roue est chauffée puis refroidie de la plaque vers la jante. La roue est tout d'abord chauffée pour former de l'austénite à travers les parties formant la plaque et la jante. La roue est ensuite refroidie pour former de la bainite/martensite dans la partie formant la plaque. La roue est refroidie pour former de la bainite/martensite dans une partie interne de la jante. La roue est refroidie pour former de la bainite/martensite dans une partie externe de la jante.

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