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1. (WO2018123469) BEARING COMPONENT AND METHOD FOR MANUFACTURING SAME

Pub. No.:    WO/2018/123469    International Application No.:    PCT/JP2017/043640
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Wed Dec 06 00:59:59 CET 2017
IPC: C21D 9/40
C21D 1/10
Applicants: NTN CORPORATION
NTN株式会社
Inventors: YUKI, Hiroshi
結城 敬史
SATO, Miyu
佐藤 美有
OHKI, Chikara
大木 力
Title: BEARING COMPONENT AND METHOD FOR MANUFACTURING SAME
Abstract:
The method for manufacturing a bearing pertaining to an embodiment of the present invention is provided with: a preparation step (S10) for preparing a steel-made ring-shaped member (1) having an inside-diameter face (12), an outside-diameter face (11), and a wall thickness that is the distance between the inside-diameter face and the outside-diameter face; and a heat treatment step (S20) for performing heat treatment in which the inside-diameter face or the outside-diameter face is locally heated to a heat treatment temperature and then cooled; the expression S ≥ 930/(0.3477W2 – 1.594W – 0.804) being satisfied, where S is the average temperature increase rate (units: °C/second) during heating, and W is the wall thickness (units: mm).