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Title:
STEEL SHEET FOR HOT-DIP GALVANIZING, HOT-DIP GALVANIZED STEEL SHEET, AND ALLOYED HOT-DIP GALVANNEALED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2022/191009
Kind Code:
A1
Abstract:
The present invention can provide a steel sheet for hot-dip galvanizing from which an alloyed hot-dip galvannealed steel sheet having a high Si content and suppressed alloying unevenness can be produced. The steel sheet for hot-dip galvanizing according to the present invention has an internal oxide layer containing an oxide of Si between the surface layer of the steel sheet and a basis material part of the steel sheet, the Si content in the chemical composition of the steel sheet is 1.0 mass% or more, and the amount of solid-solution Si from the surface of the steel sheet to a 1 µm-deep site, as measured in all four positions, i.e., the positions 10mm, 30mm, and 50mm from the edge in the width direction of the coil and the center position in the width direction of the coil at a rear end in a rolling direction of the steel sheet for hot-dip galvanizing, is 1.4 wt% or less.

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Inventors:
KAWAKAMI AKIRA
SHIGE HIROO
IRIE HIROSHI
MAEDA TAKAYUKI
YU HANG
Application Number:
PCT/JP2022/008966
Publication Date:
September 15, 2022
Filing Date:
March 02, 2022
Export Citation:
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Assignee:
KOBE STEEL LTD (JP)
International Classes:
C21D9/46; C21D1/76; C22C38/00; C22C38/02; C22C38/60; C23C2/02; C23C2/06; C23C2/40
Domestic Patent References:
WO2016038801A12016-03-17
Foreign References:
JP2016180140A2016-10-13
JP2019535895A2019-12-12
JP2000309824A2000-11-07
JP2000309847A2000-11-07
JP2002155317A2002-05-31
JP2006233333A2006-09-07
JP2000309824A2000-11-07
JP2021036227A2021-03-04
JP2022014413A2022-01-19
Other References:
WILLIAM C. LESLIE: "The Physical Metallurgy of Steels, Leslie", MARUZEN CO., LTD., pages: 273
Attorney, Agent or Firm:
KOTANI, Masataka et al. (JP)
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