#039 Tempering of SKD61 Technical Tutorial - MISUMI. Therefore, in this course, the tempering characteristics of SKD61 are explained below. (1)Reduction in the hardness due to tempering. suj2 hardness before tempering-Anika Stahlová China steel US6440233B2 - Rolling bearing - Google Patents. An inner ring and an outer ring are composed as follows.These members are fabricated with a steel for bearing containing carbon 0.6 wt % or higher.A carbonitrided layer is formed in a raceway surface.The amount of residual austenite at a position of 2% Da depth in the raceway surface is determined to be 1.0 vol % or lower.Hardness at the position
US6440233B2 US09/817,250 US81725001A US6440233B2 US 6440233 B2 US6440233 B2 US 6440233B2 US 81725001 A US81725001 A US 81725001A US 6440233 B2 US6440233 B2 US 6440233B2 Authority US United States Prior art keywords raceway ring rolling suj2 resistance Prior art date 2000-03-28 Legal status (The legal status is an assumption and is not a legal conclusion.