Rolling member and rolling bearing

A bearing component of steel having a surface, the bearing component including a superficial part that is a region up to a distance of 20 μm from the surface,

• the steel containing greater than or equal to 0.70 mass % and less than or equal to 1.10 mass % of carbon, greater than or equal to 0.15 mass % and less than or equal to 0.35 mass % of silicon, greater than or equal to 0.30 mass % and less than or equal to 0.60 mass % of manganese, greater than or equal to 1.30 mass % and less than or equal to 1.60 mass % of chromium, less than or equal to 0.50 mass % of vanadium, and less than or equal to 0.50 mass % of molybdenum, and the remainder of iron and inevitable impurities,
• the steel of the superficial part having martensite block grains, and precipitates,
• the precipitates being nitride based on chromium or vanadium, or carbonitride based on chromium or vanadium,
• in the steel of the superficial part, a maximum grain size of the martensite block grain being less than or equal to 5.0 μm,
• in the steel of the superficial part, a maximum value of crystal orientation density of a {011} plane of the martensite block being less than or equal to 3.25-fold random.

A bearing component of steel having a surface, the bearing component including a superficial part that is a region up to a distance of 20 μm from the surface,

• the steel containing greater than or equal to 0.70 mass % and less than or equal to 1.10 mass % of carbon, greater than or equal to 0.15 mass % and less than or equal to 0.35 mass % of silicon, greater than or equal to 0.30 mass % and less than or equal to 0.60 mass % of manganese, greater than or equal to 1.30 mass % and less than or equal to 1.60 mass % of chromium, less than or equal to 0.50 mass % of vanadium, and less than or equal to 0.50 mass % of molybdenum, and the remainder of iron and inevitable impurities,
• in the steel of the superficial part, precipitate being dispersed,
• the precipitates being nitride based on chromium or vanadium, or carbonitride based on chromium or vanadium,
• an area fraction of the precipitates in the steel of the superficial part being greater than or equal to 2.0%.

A bearing component of steel having a surface, the bearing component including a superficial part that is a region up to a distance of 20 μm from the surface,

• the steel containing greater than or equal to 0.70 mass % and less than or equal to 1.10 mass % of carbon, greater than or equal to 0.15 mass % and less than or equal to 0.35 mass % of silicon, greater than or equal to 0.30 mass % and less than or equal to 0.60 mass % of manganese, greater than or equal to 1.30 mass % and less than or equal to 1.60 mass % of chromium, less than or equal to 0.50 mass % of vanadium, and less than or equal to 0.50 mass % of molybdenum, and the remainder of iron and inevitable impurities,
• the steel of the superficial part having martensite block grains, and precipitates,
• the precipitates being nitride based on chromium or vanadium, or carbonitride based on chromium or vanadium,
• in the steel of the superficial part, an average grain size of the martensite block grains at a comparison area fraction of 30% being less than or equal to 2.0 μm.