| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing having improved productivity, and achieving long life by suppressing the occurrence of white structure peeling, compared to conventional art.SOLUTION: There is provided the rolling bearing in which: at least one of an inner ring, an outer ring, and a rolling element is formed of steel including C, Si, Mn, Cr in respective specific amount; the number of oxide non-metallic inclusions having 10 μm or more of circle equivalent diameter in the steel, and surface hardness and a residual austenite amount after hardening and tempering are respectively specific values; the amounts of Si, Mn, Cr in the steel and Mo each satisfy the formula (1), and a ratio of a Cr amount of spherical carbide after hardening and tempering ([Cr]) and a Cr amount ([Cr]) in martensite in a matrix satisfies the formula (2):(1) is 0.5[Si]+0.2[Mn]+0.2[Cr]+0.7[Mo]≥0.95, and (2) is 5.0≤[Cr]/[Cr]≤7.0.SELECTED DRAWING: Figure 1 |
