Title:
THICK STEEL PLATE AND METHOD FOR MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP2023128423
Kind Code:
A
Abstract:
To provide a thick steel plate which enhances adhesion of a scale, suppresses or prevents scale peeling at the time of laser irradiation, and accordingly is useful for applying laser cutting, and a method for manufacturing the same.SOLUTION: There are provided a thick steel plate that includes a steel plate, and a scale formed on the surface of the steel plate, wherein a maximum length in a plate thickness direction of cracks existing in the scale is 50% or less average thickness of the scale, the scale includes a laminar fayalite formed on the interface between the scale and the steel plate, an average thickness of the laminar fayalite is 0.3-2.0 μm, a covering ratio of the interface by the laminar fayalite is 50% or more, the scale further includes a laminar magnetite, an average thickness of the laminar magnetite is 2.0 μm or more, and a thickness deviation of the scale is 0.25 or less; and a method for manufacturing the same.SELECTED DRAWING: None
Inventors:
KAWADA HIROYUKI
TANEI HIROSHI
HARANO TAKAYUKI
SAKAI TATSUHIKO
HONMA RYUICHI
SHIRAHATA HIROYUKI
TANEI HIROSHI
HARANO TAKAYUKI
SAKAI TATSUHIKO
HONMA RYUICHI
SHIRAHATA HIROYUKI
Application Number:
JP2022032761A
Publication Date:
September 14, 2023
Filing Date:
March 03, 2022
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
B21B45/00; B21B1/38; B21B45/08; C21D8/02; C21D9/00; C22C38/00; C22C38/60; C23C26/00
Attorney, Agent or Firm:
Atsushi Aoki
Shinji Mihashi
Ritsuo Fukuchi
Manabu Saito
Kenji Kimura
Shinji Mihashi
Ritsuo Fukuchi
Manabu Saito
Kenji Kimura