US 12,221,705 B2
Alloyed galvanized steel sheet, electrodeposition-coated steel sheet, automotive part, method of producing electrodeposition-coated steel sheet, and method of producing alloyed galvanized steel sheet
Shunsuke Yamamoto, Tokyo (JP); Katsutoshi Takashima, Tokyo (JP); Mai Aoyama, Tokyo (JP); Yusuke Okumura, Tokyo (JP); Tomomi Kanazawa, Tokyo (JP); Katsuya Hoshino, Tokyo (JP); Hiroshi Matsuda, Tokyo (JP); Ei Okumura, Tokyo (JP); Yoichi Makimizu, Tokyo (JP); and Masaki Koba, Tokyo (JP)
Assigned to JFE STEEL CORPORATION, Tokyo (JP)
Appl. No. 18/251,269
Filed by JFE STEEL CORPORATION, Tokyo (JP)
PCT Filed Nov. 5, 2021, PCT No. PCT/JP2021/040870
§ 371(c)(1), (2) Date May 1, 2023,
PCT Pub. No. WO2022/097733, PCT Pub. Date May 12, 2022.
Claims priority of application No. 2020-186205 (JP), filed on Nov. 6, 2020.
Prior Publication US 2023/0407485 A1, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C23C 28/02 (2006.01); C21D 1/74 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 33/04 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/38 (2006.01); C23C 2/02 (2006.01); C23C 2/26 (2006.01); C23C 2/28 (2006.01); C25D 3/20 (2006.01); C25D 5/36 (2006.01); C23C 2/06 (2006.01); C23C 2/40 (2006.01)
CPC C23C 28/021 (2013.01) [C21D 1/74 (2013.01); C21D 6/001 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0263 (2013.01); C21D 8/0278 (2013.01); C21D 9/46 (2013.01); C22C 33/04 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C22C 38/38 (2013.01); C23C 2/02 (2013.01); C23C 2/024 (2022.08); C23C 2/26 (2013.01); C23C 2/28 (2013.01); C25D 3/20 (2013.01); C25D 5/36 (2013.01); C21D 2251/02 (2013.01); C23C 2/06 (2013.01); C23C 2/40 (2013.01); Y10T 428/12958 (2015.01)] 16 Claims
OG exemplary drawing
 
1. An alloyed galvanized steel sheet comprising:
a Si-containing cold-rolled steel sheet containing Si in an amount of 0.1 mass % or more and 3.0 mass % or less;
an Fe-based electroplating layer formed on at least one surface of the Si-containing cold-rolled steel sheet with a coating weight per surface of more than 20.0 g/m2; and
an alloyed galvanized layer formed on the Fe-based electroplating layer, wherein
crystal orientations of the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet are integrated at a ratio of more than 50% at an interface between the Fe-based electroplating layer and the Si-containing cold-rolled steel sheet.