| 摘要 |
PROBLEM TO BE SOLVED: To provide steel for vehicle wheels excellent in balance between wear resistance, rolling fatigue resistance, and spalling resistance; having enhanced high-temperature yield strength and high ductility; and giving long life to wheels.SOLUTION: Steel for vehicle wheels includes, in terms of mass%: 0.65-0.84% of C; 0.4-1.0% of Si; 0.50-1.40% of Mn; 0.02-0.13% of Cr; ≤0.04% of S; 0.02-0.12% of V, wherein Fn1 represented by formula (1) is 32-43 and Fn2 represented by formua (2) is ≤25; and the remainder Fe and impurities. Fn1=2.7+29.5×C+2.9×Si+6.9×Mn+10.8×Cr+30.3×Mo+44.3×V (1). 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) (2). |
