| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller bearing which has a long life at high temperatures and an improved resistance to cracks caused by fitting to the main shaft. SOLUTION: This roller bearing has an inner ring, an outer ring, and a bearing ring having rolling elements and is formed from steel comprising 0.1-0.4 mass% C, 0.3-3.0 mass% Si, 0.2-2.0 mass% Mn, 0.03 mass% or lower P, 0.03 mass% or lower S, 0.3 mass% or higher but lower than 2.5 mass% Cr, 0.1 mass% or higher but lower than 2.0 mass% Ni, 0.05 mass% or lower Al, 0.003 mass% or lower Ti, 0.0015 mass% or lower O, 0.0025 mass% or lower N, and the balance being Fe and unavoidable impurities. COPYRIGHT: (C)2003,JPO
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