Title:
TRAVERSE HARDENING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/187765
Kind Code:
A1
Abstract:
This traverse hardening device is a device for carrying out traverse hardening on a shaft-like body which is arranged such that the axis is along the vertical direction and which comprises a main body section and a large-diameter section that is provided on a portion of the main body section in the axial direction and that has a larger outer diameter than the main body section. This traverse hardening device comprises: a heating unit for heating the shaft-like body; a cooling unit having a through-hole which penetrates in the vertical direction and into which the shaft-like body is inserted, and an injection hole which is formed in the inner circumferential surface of the through-hole and from which a cooling liquid is injected; and a guide tube, the inner diameter of the lower end of which is smaller than the inner diameter of the upper end, at least a portion of which is arranged below the cooling unit, and into which the shaft-like body is inserted.
Inventors:
YAMANE AKIHITO (JP)
HATA TOSHIYUKI (JP)
KOZUKA CHIHIRO (JP)
HATA TOSHIYUKI (JP)
KOZUKA CHIHIRO (JP)
Application Number:
PCT/JP2019/005800
Publication Date:
October 03, 2019
Filing Date:
February 18, 2019
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D9/28; C21D1/667
Foreign References:
| JP2018003091A | 2018-01-11 | |||
| JP2005344159A | 2005-12-15 | |||
| JP2008240101A | 2008-10-09 | |||
| JP2018058807A | 2018-04-12 | |||
| JP2008240101A | 2008-10-09 |
Other References:
See also references of EP 3778932A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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