| 摘要 |
A bearing steel includes, as a metallographic structure, inclusions which contain complex oxysulfides including Rare Earth Metal, Ca, O, S, and Al, TiN, MnS, Al 2 O 3 , and complex oxides including Al and Ca, wherein, a number fraction of the complex oxysulfides in a total number of the inclusions is 50% to less than 100% and a number of complex oxysulfides having a major axis of 5 µm or more is 0.001 pieces to 2 pieces in an observed section of 1 mm 2 , and a number of TiN existing independently from the complex oxysulfides and having a major axis of 5 µm or more is 0.001 pieces to less than 1.0 piece in an observed section of 1 mm 2 . |
