Title:
CAN STEEL SHEET AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2022/163073
Kind Code:
A1
Abstract:
Provided is a can steel sheet 1 having excellent weldability. The can steel sheet 1 has a metal chromium layer 3 and a chromium hydrous oxide layer 4 formed in this order on a surface of a steel sheet 2 when observed from the steel sheet 2 side. The amount of the metal chromium layer 3 attached is 50 to 200 mg/m2, the amount of the chromium hydrous oxide layer 4 attached in terms of chromium content is 3 to 30 mg/m2. The metal chromium layer 3 includes a flat-plate-like base part 3a and particle-like protrusions 3b formed on the base part 3a. At least 20% of the particle-like protrusions 3b has a true roundness degree C of 0.85 or less. The true roundness degree C is represented by the formula: C = 4 πA/U2 wherein U represents the outer peripheral length of a projected image of a particle-like protrusion 3b and A represents the area of the particle-like protrusion 3b.
Inventors:
KAWAMURA YUTO (JP)
NAKAGAWA YUSUKE (JP)
YAMANAKA YOICHIRO (JP)
WANG JIALIN (JP)
KOZU SHUHEI (JP)
NAKAGAWA YUSUKE (JP)
YAMANAKA YOICHIRO (JP)
WANG JIALIN (JP)
KOZU SHUHEI (JP)
Application Number:
PCT/JP2021/041946
Publication Date:
August 04, 2022
Filing Date:
November 15, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C25D5/16; C23C26/00; C25D3/04; C25D5/14; C25D5/18; C25D5/26
Domestic Patent References:
| WO2018225739A1 | 2018-12-13 | |||
| WO2018225739A1 | 2018-12-13 | |||
| WO2018225726A1 | 2018-12-13 |
Foreign References:
| JPH0246678B2 | 1990-10-16 | |||
| JPH03229897A | 1991-10-11 | |||
| JPS6254096A | 1987-03-09 | |||
| JP2020117748A | 2020-08-06 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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