Title:
HOT-STAMPED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2021/039971
Kind Code:
A1
Abstract:
This hot-stamped article comprises a steel base material, a plating layer that is formed on the surface of the base material, and a chemical conversion coating that is formed on the surface of the plating layer. The chemical composition of the plating layer includes, by mass%, 20.00%–45.00% of Al, 10.00%–45.00% of Fe, 4.50%–15.00% of Mg, 0.10%–3.00% of Si, 0.05%–3.00% of Ca, 0%–0.50% of Sb, 0%–0.50% of Pb, 0%–1.00% of Cu, 0%–1.00% of Sn, 0%–1.00% of Ti, 0%–0.50% of Sr, 0%–1.00% of Cr, 0%–1.00% of Ni, and 0%–1.00% of Mn, the remainder being Zn and impurities. The chemical conversion coating comprises zinc phosphate crystals that contain, by mass%, 5.0%–50.0% of Mg and 0.5%–5.0% of Ca. There is 0.1–10.0 g/m2 of the chemical conversion coating per side.
Inventors:
MITSUNOBU TAKUYA (JP)
TOKUDA KOHEI (JP)
TAKAHASHI TAKEHIRO (JP)
TAKEBAYASHI HIROSHI (JP)
TOKUDA KOHEI (JP)
TAKAHASHI TAKEHIRO (JP)
TAKEBAYASHI HIROSHI (JP)
Application Number:
PCT/JP2020/032643
Publication Date:
March 04, 2021
Filing Date:
August 28, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C28/00; C21D1/18; C21D9/00; C22C18/04; C22C21/00; C22C30/06; C22C38/34; C23C2/06; C23C2/12; C23C2/28; C23C22/12; C23C22/82; C22C38/00; C22C38/04
Domestic Patent References:
| WO2018139620A1 | 2018-08-02 | |||
| WO2013153682A1 | 2013-10-17 |
Foreign References:
| JP2010180428A | 2010-08-19 | |||
| JP2018090879A | 2018-06-14 | |||
| JP2019157205A | 2019-09-19 | |||
| JP2012112010A | 2012-06-14 | |||
| JP2017066459A | 2017-04-06 | |||
| JP2016089232A | 2016-05-23 |
Other References:
See also references of EP 4023790A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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