METHOD OF THERMAL STRENGTHENING OF RAILWAY WHEELS Russian patent published in 2009 - IPC C21D9/34 

FIELD: metallurgy.

SUBSTANCE: invention relates to thermal treatment field. For providing of solidity not less than 300 HB on depth not less than 50 mm from surface of volution wheel tread, exclusions during the process of cooling of formation of hardening structures and providing of maximal drop of residual voltage, solid-rolled wheels made of steel with carbon content no less than 0.60 wt % is heated till the austenitising temperature and intensively cooled, at that during the cooling process from the moment of the beginning for 50-100 seconds it is implemented increasing of cooling intensity of comb roll surface and side surfaces of crown by all height from 0 till value 2-3 W/(cm²·s), then it is cooled during 40-300 sec with constant refrigeration rate of specified wheel face equal to value 2-3 W/(cm²·s) for providing of strengthening in all crown volume.

EFFECT: providing of material strengthening.

2 dwg, 3 tbl