Title:
FE-BASED ELECTROPLATED STEEL SHEET, HOT-DIP GALVANIZED STEEL SHEET, AND METHODS FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2022/244772
Kind Code:
A1
Abstract:
According to the present invention, a base steel sheet containing 0.50-3.00 mass% of Si is subjected to Fe-based electroplating by using an Fe-based electroplating solution containing Fe ions and transition metal ions other than Fe ions so as to form an Fe-based electroplated layer, and annealing is subsequently performed thereon. In the Fe-based electroplating solution, the Fe ion content is 1.0 mass% or more, and the transition metal ion content is 10-1000 mass ppm. The adhesion amount of the Fe-based electroplated layer per surface of the base steel sheet is 1.0 g/m2 or more. Thus, a steel sheet having high strength and also having excellent resistance to resistance-welding cracking at a welded part is obtained.
Inventors:
MAKIMIZU YOICHI (JP)
YAMAMOTO SHUNSUKE (JP)
OKUMURA YUSUKE (JP)
HOSHINO KATSUYA (JP)
OKUMURA EI (JP)
TAKASHIMA KATSUTOSHI (JP)
YAMAMOTO SHUNSUKE (JP)
OKUMURA YUSUKE (JP)
HOSHINO KATSUYA (JP)
OKUMURA EI (JP)
TAKASHIMA KATSUTOSHI (JP)
Application Number:
PCT/JP2022/020528
Publication Date:
November 24, 2022
Filing Date:
May 17, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C23C2/02; C21D9/46; C22C38/00; C22C38/02; C22C38/60; C23C2/06; C23C2/40; C23C28/00; C25D5/26
Domestic Patent References:
| WO2020148944A1 | 2020-07-23 | |||
| WO2019116531A1 | 2019-06-20 |
Foreign References:
| JPH05156416A | 1993-06-22 | |||
| JPH04236750A | 1992-08-25 | |||
| JP2002161317A | 2002-06-04 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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