Title:
FACILITY FOR PRODUCING PIERCING PLUG
Document Type and Number:
WIPO Patent Application WO/2013/161177
Kind Code:
A1
Abstract:
This facility for producing a plug used in a piercing mill used in the production of a seamless steel pipe is provided with: a shot blasting device that shot blasts the surface of a plug; and an arc spraying device that arc sprays an iron wire to the base material surface of the plug that has been subjected to shot blasting, forming a coating film configured from an oxide and Fe. The arc spraying device has a plurality of spraying booths that individually form a coating film for each of a plurality of regions resulting from demarcating the base material surface of the plug along the axial direction of the plug. As a result, it is possible to produce a plug that can maintain plug production efficiency at a high level, is stable during piercing, and can have increased plug life.
Inventors:
YAMAMOTO TOMOHIRO (JP)
HIDAKA YASUYOSHI (JP)
HIGASHIDA YASUTO (JP)
HIDAKA YASUYOSHI (JP)
HIGASHIDA YASUTO (JP)
Application Number:
PCT/JP2013/001859
Publication Date:
October 31, 2013
Filing Date:
March 19, 2013
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B21B25/00; B21B19/04; C23C4/08; C23C4/10; C23C4/12
Domestic Patent References:
| WO2009057471A1 | 2009-05-07 | |||
| WO2010100968A1 | 2010-09-10 |
Foreign References:
| JPS60136355U | 1985-09-10 | |||
| JP2011001612A | 2011-01-06 | |||
| JP4279350B1 | 2009-06-17 |
Other References:
See also references of EP 2845657A4
Attorney, Agent or Firm:
M. MORI PATENT FIRM (JP)
Patent business corporation Woods Michio patent firm (JP)
Patent business corporation Woods Michio patent firm (JP)
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