METHOD OF THERMAL TREATMENT OF RAILWAY WHEELS Russian patent published in 1999 - IPC

FIELD: metallurgy, thermal treatment of solid railway wheels. SUBSTANCE: increased wear resistance of working layer of rim through its entire depth is achieved by thermal treatment of railway wheel which includes heating to austenization temperature, intermittent quenching of surface layer of rim, subsequent holding of wheel in air and annealing. Flow rate of coolant in the first 20-40 s is increased linearly from 0.001- 0.003 l/sq.cm.s to optimal value determined by content ( C+1/4Mn) of carbon and manganese correspondingly in steel. EFFECT: increased wear resistance of working layer of rim of wheel. 4 dwg, 4 tbl