Rolling bearing having a bearing ring with a hardened surface zone

US9239080B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventors

• Ernst Strian · Gräfenberg, DE
• Peter Gebauer · Troisdorf, DE
• Heiko Schmidt · Lappersdorf, DE
• Oliver Graf-Goller · Heroldsberg, DE

Key dates

• Filing date: Mar 4, 2013
• Grant date: Jan 19, 2016
• Expiry date: Mar 4, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T83/04
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A rolling bearing (6), in particular for the mounting of the shaft of a turbocharger, which rolling bearing includes a bearing ring (1) and a number of rolling bodies (9). The bearing ring (1) is formed from a steel which comprises, as alloy constituents, 0.05 to 0.65 wt % carbon, 0.5 to 5.0 wt % chromium, up to 1.0 wt % molybdenum, up to 1.0 wt % vanadium, and up to 1.0 wt % aluminum. The surface of the bearing ring (1) has a hardened surface layer (2) which comprises nitrites and which comprises a diffusion layer (3) and a connecting layer (4) situated above said diffusion layer. The surface layer (2) has a thickness of up to 1 mm. The invention also relates to a method for producing a corresponding bearing ring (6).