Title:
軌道輪の製造方法
Document Type and Number:
Japanese Patent JP5665564
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a bearing ring, for uniformly forming a quench-hardened layer by induction hardening over the entire periphery along a rolling surface while suppressing the manufacturing cost of a quenching apparatus.SOLUTION: The method for manufacturing the bearing ring for a rolling bearing includes: a step (S10) for preparing a formed body made of a hypereutectoid steel; a step (S30) for forming, in the formed body, an annular heated region that is heated to a temperature equal to or higher than a point Aby relatively rotating in the circumferential direction of the annular region an induction heating member that performs induction heating of the formed body and that is disposed to face a part of the annular region in the formed body that is to be the rolling surface of the bearing ring; and a step (S40) for simultaneously cooling the whole heated region to a temperature equal to or lower than a point Ms.
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Inventors:
結城 敬史
大木 力
八木田 和寛
大木 力
八木田 和寛
Application Number:
JP2011010723A
Publication Date:
February 04, 2015
Filing Date:
January 21, 2011
Export Citation:
Assignee:
ＮＴＮ株式会社
International Classes:
C21D9/40; C21D1/10; C21D1/28; C21D7/06; F16C33/62; F16C33/64
Attorney, Agent or Firm:
Patent business corporation Fukami patent firm