| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing which hardly causes damages, such as surface peeling due to the corrosion wear even when the rolling bearing is used in the environment where the liquid easily causing rust and corrosion easily intrudes inside the bearing. SOLUTION: A carbonitriding layer containing at least 0.80 mass% C, and 25 to 35 vol.% residual austenite is formed on the surfaces of an inner race 1, an outer race 2, and respective rollers 3. Further, a film of manganese phosphate having a surface roughness of 0.5 to 1.0μm Ra is formed on the raceway surfaces 1a, 2a of the inner race 1 and the outer race 2, and the rolling contact surfaces 3a of the rollers 3. By this configuration, the adhesive strength of the film of manganese phosphate having the rustproof effect is sufficiently secured, and the corrosion wear of the raceway surfaces 1a, 2a of the inner race 1 and the outer race 2, and the rolling contact surfaces 3a of the rollers 3 can be prevented, and further the occurrence of the damages, such as surface peeling due to stress concentration can be prevented. COPYRIGHT: (C)2006,JPO&NCIPI |
