Patent ID: 7083688

Claim:
A method for producing a steel for a high-strength race, including: producing a steel comprising the following elements, in percentage by weight: C: 0.3 to 0.6%; Si: 0.3 to 1.3%; Mn: 0.5 to 1.5%; B: 0.005% or less; Cr: 0.1 to 0.5%; Mo: 0.1 to 0.5%; Ni: 0.02 to 1.0%; balance being Fe and unavoidable impurities, wherein the total amount of Si and Mo is in a range from 0.5 to 1.4%; and treating the steel by warm-forging under a heating condition between 720° C. and 790° C. and normalizing to obtain a surface hardness of the steel in the range from 91 to 96 HRB.