Title:
METHOD FOR MANUFACTURING PIERCER PLUG
Document Type and Number:
WIPO Patent Application WO/2018/029926
Kind Code:
A1
Abstract:
Provided is a piercer plug having excellent base material deformation resistance. A method for manufacturing a piercer plug (10) is provided with: a step for preparing a plug body (1) provided with a distal-end part (11) and a cylinder part (12) disposed to the rear of the distal-end part (11), the cylinder part (12) including a hole (121) for attaching a bar; a step for forming a built-up layer (2) on the surface of the distal-end part (11); and a step for heating the plug body (1) so that the temperature of the distal-end part (11) on which the built-up layer (2) is formed is equal to or greater than the austenite transformation temperature and the temperature of the cylinder part (12) is less than the austenite transformation temperature.
Inventors:
HIDAKA YASUYOSHI (JP)
HIGASHIDA YASUTO (JP)
SHIRASAWA NAOYA (JP)
YAMANARI YUICHI (JP)
HIGASHIDA YASUTO (JP)
SHIRASAWA NAOYA (JP)
YAMANARI YUICHI (JP)
Application Number:
PCT/JP2017/017763
Publication Date:
February 15, 2018
Filing Date:
May 10, 2017
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B21B25/00; B23K9/04; B23K10/02; B23K35/30; C21D1/18; C21D1/42; C21D9/00; C22C19/05; C22C27/04; C22C38/00; C22C38/04; C22C38/54; C23C4/06; C23C4/18
Domestic Patent References:
| WO2014109180A1 | 2014-07-17 | |||
| WO2013153878A1 | 2013-10-17 | |||
| WO2013161489A1 | 2013-10-31 |
Foreign References:
| JPH04351508A | 1992-12-07 | |||
| JP2007326554A | 2007-12-20 | |||
| JPH05171340A | 1993-07-09 | |||
| JPS63192504A | 1988-08-09 |
Other References:
See also references of EP 3498388A4
Attorney, Agent or Firm:
UEBA, Hidetoshi (JP)
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