| 摘要 |
PROBLEM TO BE SOLVED: To provide bearing steel which is excellent in corrosion resistance, and rolling fatigue life even when adapted for bearings etc., of rolling mills. SOLUTION: The bearing steel has a composition containing, by weight %, 0.10 to 0.3 C,≤0.5 Si, 0.2 to 1.5 of Mn,≤0.03 P,≤0.03 S, 1.0 to 3.5 Ni, 1.0 to 5.0 Cr, 0.03 to 2.5 Mo, 0.005 to 0.050 Al,≤0.003 Ti,≤0.0015 O,≤0.025 N, and substantially the balance Fe, wherein after carburizing or carbonitriding treatment, a surface C concentration is≥0.7%, the content of the carbide is≤15% by area and the content of the rod-like carbide 10 having an aspect ratio expressed by the ratio of major diameter to minor diameter of≥3 and having a minor diameter of≥2μm is≤0.1%. COPYRIGHT: (C)2005,JPO&NCIPI
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