Patent ID: 8485730
Filing Date: 2013-07-16
Classification: F16C

Abstract:
1. A rolling bearing comprising: a race member constituted of a steel matrix containing at least 0.77 mass % and not more than 0.85 mass % of carbon, at least 0.01 mass % and not more than 0.25 mass % of silicon, at least 0.01 mass % and not more than 0.35 mass % of manganese, at least 0.01 mass % and not more than 0.15 mass % of nickel, at least 3.75 mass % and not more than 4.25 mass % of chromium, at least 4 mass % and not more than 4.5 mass % of molybdenum and at least 0.9 mass % and not more than 1.1 mass % of vanadium with the rest consisting of iron and impurities and provided with a nitrogen-enriched layer having a nitrogen concentration of at least 0.05 mass % formed on a region including a surface so that a total of a carbon concentration and said nitrogen concentration in said nitrogen-enriched layer is at least 0.82 mass % and not more than 1.9 mass % throughout all of the nitrogen-enriched layer of the matrix; a plurality of rolling elements, in contact with said race member, arranged on an annular race; and a cage retaining said rolling elements on said race, wherein said race member includes a race member contact surface in contact with said cage, said cage includes a cage contact surface in contact with said race member, and an anti-seizure layer made of a material different from the material constituting said race member is arranged on a region including at least either said race member contact surface or said cage contact surface.