Title:
METHOD OF MANUFACTURING FOR ROLLING BEARING RETAINER
Document Type and Number:
Japanese Patent JP2009236227
Kind Code:
A
Abstract:
To provide a manufacturing method providing a rolling bearing retainer ensuring excellent fatigue strength and abrasion resistance even under severe use conditions and suppressing heat-treatment deformation to a low level.
Steel material is processed into a predetermined shape. After that, the steel material is subjected to gas nitriding treatment under a condition in which temperature rises continuously from start temperature of 350-520C to end temperature of 550-700C, and then is cooled rapidly. Steel containing, 0.01-0.20 mass% C, 0.05-1.0 mass% Mn, 0.03 mass% P, 0.05 mass% S, 0.01-0.1 mass% Al, 0.2-2.0 mass% Cr, and the balance Fe with inevitable impurities is used as the steel forming the material.
Inventors:
KATAYAMA YUKARI
Application Number:
JP2008083632A
Publication Date:
October 15, 2009
Filing Date:
March 27, 2008
Export Citation:
Assignee:
NSK LTD
International Classes:
F16C33/54; C21D1/06; C21D9/40; C22C38/00; C22C38/60; C23C8/02; C23C8/26; F16C33/42; F16C33/44; F16C33/56
Attorney, Agent or Firm:
Takeo Koyama
Takashi Daejeon
Masaki Muto
Go Shino
Kinzo Koyama
Takashi Daejeon
Masaki Muto
Go Shino
Kinzo Koyama