| 摘要 |
Steel for a vehicle wheel containing C in an amount of 0.65 to 0.84%, Si in an amount of 0.4 to 1.0%, Mn in an amount of 0.50 to 1.40%, Cr in an amount of 0.02 to 0.13%, S in an amount of 0.04% or less, and V in an amount of 0.02 to 0.12%; Fn1 in the formula Fn1=2.7+29.5×C+2.9×Si+6.9×Mn+10.8×Cr+30.3×Mo+44.3×V being 32 to 43; Fn2 in the formula Fn2=exp(0.76)×exp(0.05×C)×exp(1.35×Si)×exp(0.38×Mn)×exp(0.77×Cr)×exp(3.0×Mo)×exp(4.6×V) being 25 or less; the remainder comprising Fe and impurities; and the amounts of P, Cu, and Ni contained in the impurities being 0.05% or less, 0.20% or less, and 0.20% or less, respectively. This steel has an exceptional balance between wear resistance, rolling fatigue resistance, and spalling resistance, while also having exceptional high-temperature yield strength and high ductility. |
