Invention Grant
- Patent Title: Method for manufacturing a rolling element bearing
- Patent Title (中): 滚动体轴承制造方法
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Application No.: US13677860Application Date: 2012-11-15
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Publication No.: US08793878B2Publication Date: 2014-08-05
- Inventor: Juergen Gegner , Wolfgang Nierlich , Armin Olschewski , Kenred Stadler , Arno Stubenrauch , Markus Volkmuth
- Applicant: Aktiebolaget SKF
- Applicant Address: SE Gothenburg
- Assignee: Aktiebolaget SKF
- Current Assignee: Aktiebolaget SKF
- Current Assignee Address: SE Gothenburg
- Agency: SKF USA Inc. Patent Department
- Agent Bryan Peckjian
- Priority: DE102012204409 20120320
- Main IPC: B21K1/04
- IPC: B21K1/04 ; F16C33/64 ; C21D9/40

Abstract:
A method for manufacturing a rolling-element bearing includes forming an inner ring from a steel having a sulfur content of 0.002 to 0.015 mass % and an oxygen content of less than 15 ppm, subjecting the inner ring to a hardening heat treatment that ends by performing a final heat treatment step at a predetermined temperature, cold working the inner-ring raceway to generate compressive residual stresses at least in a surface layer of the inner-ring raceway, subjecting the inner ring to a bluing treatment and subjecting the blued inner ring to a thermal post-treatment process at a temperature below the predetermined temperature of the final hardening heat treatment step. The resulting rolling-element bearing may exhibit compressive residual stresses having an absolute value of at least 200 MPa at 0.1 mm beneath the outer surface of the inner-ring raceway and a maximum value of 1500 MPa or less throughout the inner ring.
Public/Granted literature
- US20130251298A1 Rolling Element Bearing and Method of Making the Same Public/Granted day:2013-09-26
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