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Title:
HEAT TREATMENT METHOD AND HEAT TREATMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/012626
Kind Code:
A1
Abstract:
Provided is a heat treatment method for obtaining an annular roller bearing raceway ring the thickness of which changes in the axial direction, the method comprising: (A) subjecting an annular workpiece, which is made of a high-carbon chromium bearing steel and the thickness of which changes in the axial direction, to a quenching treatment; (B) subjecting the quenched workpiece to a tempering treatment, immersing the entire workpiece in a cooling liquid, and while in this state inductively heating the workpiece; and (C) subjecting the tempered workpiece to a finishing process.

Inventors:
SUZUKI KENSUKE (JP)
YOSHIDA WATARU (JP)
Application Number:
JP2017/025783
Publication Date:
January 18, 2018
Filing Date:
July 14, 2017
Export Citation:
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Assignee:
JTEKT CORP (JP)
International Classes:
C21D9/40; C21D1/18; C21D1/42; F16C19/36; F16C33/64
Foreign References:
JP2016079466A2016-05-16
JP2016080097A2016-05-16
JPH06172866A1994-06-21
JP2009007595A2009-01-15
JP2012162799A2012-08-30
Attorney, Agent or Firm:
UENO, Hideki (JP)
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