FIELD: metallurgy.
SUBSTANCE: invention relates to metallurgy. To up the fatigue resistance, ingot ESR step is implemented followed by cooling. Before ESR ingot shell temperature falls beyond steel martensitic transformation temperature MS said ingot is placed in the furnace with initial temperature T0 higher than that of perlite conversion at steel cooling Ar1. Ingot is subjected to annealing treatment in said furnace for at least during hold interval t after which the temperature of the ingot coldest point reaches blending temperature T Note here that said time t equals at least 1 hour while blending temperature T varies from about 900°C to steel burn-out temperature.
EFFECT: higher fatigue strength.
8 cl, 6 dwg, 1 tbl
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