Title:
Al-PLATED WELDED PIPE FOR HARDENING, Al-PLATED HOLLOW MEMBER, AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/097729
Kind Code:
A1
Abstract:
Provided is an Al-plated electric-resistance-welded pipe for hardening such that said pipe can be hot-worked while formation of scales inside the plating layer are suppressed. Also provided is an Al-plated hollow member using the Al-plated electric-resistance-welded pipe. The Al-plated electric-resistance-welded pipe for hardening comprises a base section which is formed from a cylindrical steel sheet and has a predetermined chemical composition and an electric-resistance-welded section which is disposed at an abutment part of the steel sheet and extends in a longitudinal direction of the steel sheet, said steel pipe being characterized in that the base section is further provided with an intermetallic compound layer which is located on a surface of the steel sheet and includes an Al-Fe-Si-based intermetallic compound and an Al plating layer which is located on a surface of the intermetallic compound layer and contains Al and Si, and said steel pipe satisfies 70 x X/D ≤ Y/t ≤ 30 where X (µm) is the thickness of the intermetallic compound layer, Y (µm) is the thickness of the Al plating layer, t (mm) is the pipe thickness of the steel pipe, and D (mm) is the outer diameter of the steel pipe.
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Inventors:
MAKI JUN (JP)
FUJITA SOSHI (JP)
NAKAMURA TOYOMITSU (JP)
FUJITA SOSHI (JP)
NAKAMURA TOYOMITSU (JP)
Application Number:
PCT/JP2017/041697
Publication Date:
May 23, 2019
Filing Date:
November 20, 2017
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C2/12; C23C2/28; C23C2/38
Domestic Patent References:
| WO2009131233A1 | 2009-10-29 | |||
| WO2017080621A1 | 2017-05-18 |
Foreign References:
| JP2014118628A | 2014-06-30 | |||
| JP2008069398A | 2008-03-27 | |||
| JPS58204179A | 1983-11-28 | |||
| JP2017026147A | 2017-02-02 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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