Title:
TRAVERSE HARDENING METHOD AND TRAVERSE HARDENING DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/057405
Kind Code:
A1
Abstract:
Provided is a traverse hardening method which is characterized by using a traverse hardening device (100) equipped with a plurality of high frequency coils, and by involving: rotating a shaft-like body (10), which is inserted inside the plurality of high frequency coils (111), relative to the plurality of high frequency coils (111); moving the plurality of high frequency coils (111) axially relative to the shaft-like body (10); performing traverse hardening by moving a plurality of heating areas which are generated on the surface of the shaft-like body (10) by the plurality of high frequency coils (111); and changing at least one of the rotation speed of the shaft-like body (10) relative to the plurality of high frequency coils (111) and the moving speed of the plurality of high frequency coils (111) relative to the shaft-like body (10) in the axial direction such that a plurality of heating zones, which the plurality of heating areas pass through, overlap each other or lie adjacent to each other.
Inventors:
YAMANE AKIHITO (JP)
HATA TOSHIYUKI (JP)
KOZUKA CHIHIRO (JP)
HATA TOSHIYUKI (JP)
KOZUKA CHIHIRO (JP)
Application Number:
PCT/JP2022/034239
Publication Date:
March 21, 2024
Filing Date:
September 13, 2022
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D9/28; C21D1/10
Domestic Patent References:
| WO2019181382A1 | 2019-09-26 |
Foreign References:
| JPH06330178A | 1994-11-29 | |||
| JPH0413812A | 1992-01-17 | |||
| JPH11269550A | 1999-10-05 | |||
| CN103667661A | 2014-03-26 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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