| abstract |
The present invention is bearing steel, wherein the metal composition comprises, as inclusions, compound oxysulfides containing rare earth metals, Ca, O, S, and Al; TiN; MnS; Al 2 O 3 ; and compound oxides containing Al and Ca; the number of compound oxysulfide inclusions per the total number of inclusions is 50% or greater, but less than 100%; the number of compound oxysulfide inclusions having a major axis of 5 µm or larger is between 0.001 and 2 per 1 mm 2 of observed surface; and the number of TiN inclusions having a major axis of 5 µm or greater present independent of the compound oxysulfide inclusions is 0.001 or greater, but less than 1.0 per 1 mm 2 of observed surface. |