A railway wheel in which formation of pro-eutectoid cementite is suppressed is stably produced.After heating an intermediate product containing, in mass%, C: 0.80 to 1.15% to a temperature not less than Acmtransformation point, the intermediate product is cooled such that the cooling rate (°C/sec) in a range from 800 to 500°C satisfies the following conditions:Surface other than the tread and the flange surface: not more than Fn1 defined by Formula (1),Cooling rate in a region in which cooling rate is slowest: not less than Fn2 defined by Formula (1), andTread and flange surface: not less than Fn2:Fn1=−5.0+exp5.651−1.427×C−1.280×Si−0.7723×Mn−1.815×Cr−1.519×Al−7.798×VFn2=0.515+exp−24.816+24.121×C+1.210×Si+0.529×Mn+2.458×Cr−15.116×Al−5.116×V
METHOD FOR PRODUCING RAILWAY WHEEL AND RAILWAY WHEEL
2020-04-02
Patent
Electronic Resource
English