Title:
Fe-BASED ELECTROPLATED STEEL SHEET, ALLOYED HOT-DIPPED GALVANIZED STEEL SHEET, AND METHODS FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2022/097738
Kind Code:
A1
Abstract:
Provided is a Fe-based electroplated steel sheet having excellent chemical conversion treatability, or plating appearance when performing hot-dip galvanized plating, as well as having an excellent crack-resistant characteristic against resistance welding. The Fe-based plated steel sheet according to the present invention has: a cold-rolled steel sheet having a component composition in which 0.1 mass% to 3.0 mass% of Si is contained; and an Fe-based electroplating layer formed on one side or both sides of the cold-rolled steel sheet and having a deposition amount per single side of at least 1.0 g/m2, wherein the thickness of an internal oxide layer is at most 2.00 μm, and the average value of C concentration is at most 0.10 mass% in a range of 10 μm to 20 μm from the surface of the Fe-based electroplating layer in the thickness direction of the sheet.
Inventors:
YAMAMOTO SHUNSUKE (JP)
OKUMURA YUSUKE (JP)
TAKASHIMA KATSUTOSHI (JP)
AOYAMA MAI (JP)
KANAZAWA TOMOMI (JP)
HOSHINO KATSUYA (JP)
MAKIMIZU YOICHI (JP)
KAWANO TAKASHI (JP)
YAMASHITA TAKAKO (JP)
MATSUDA HIROSHI (JP)
OKUMURA YUSUKE (JP)
TAKASHIMA KATSUTOSHI (JP)
AOYAMA MAI (JP)
KANAZAWA TOMOMI (JP)
HOSHINO KATSUYA (JP)
MAKIMIZU YOICHI (JP)
KAWANO TAKASHI (JP)
YAMASHITA TAKAKO (JP)
MATSUDA HIROSHI (JP)
Application Number:
PCT/JP2021/040876
Publication Date:
May 12, 2022
Filing Date:
November 05, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C23C2/02; C22C38/00; C22C38/06; C22C38/60; C23C2/06; C23C2/40; C23C28/02; C25D5/26; C25D5/50
Domestic Patent References:
| WO2020148944A1 | 2020-07-23 | |||
| WO1993020254A1 | 1993-10-14 | |||
| WO2019116531A1 | 2019-06-20 |
Foreign References:
| JPH04214895A | 1992-08-05 | |||
| JP2015504976A | 2015-02-16 | |||
| JP6025867B2 | 2016-11-16 |
Other References:
YAMASHITA ET AL.: "Distribution of Carbon in Low-Carbon Steel in the Early Phase of Proeutectoid Ferrite by High Precision FE-EPMA", IRON AND STEEL, vol. 103, no. 11, 2017, pages 14 - 20
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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