FIELD: railway rolling stock; reconditioning of repairable side frames and above-spring beams of freight car bogies.
SUBSTANCE: part received for repair is subjected to heating at temperature interval of from Ac1 to Ac3 of iron-carbon constitution diagram and holding at maximum temperature required for equalizing over sections of badly stressed zones; then, part is cooled in the air at accelerated cooling of zones to be hardened on side of surfaces subjected to action of tensile working stresses at rate of 1 to 12 deg/s to temperature of adjacent zones below 550°C after which part is subjected to self-tempering due to heat exchange with adjacent zones.
EFFECT: increased guaranteed term of trouble-free operation of repairable parts.
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