溶融亜鉛めっき鋼板

Japanese Patent JP6519028

B2

A hot-dip galvanized steel sheet includes a base steel sheet and a hot-dip galvanized layer formed on at least one surface of the base steel sheet, in which the hot-dip galvanized layer includes Fe in a content of more than 0% to 5% or less, Al in a content of more than 0% to 1.0% or less, and columnar grains formed by a ¶ phase on the surface of the steel sheet, further, 20% or more of the entire interface between the hot-dip galvanized layer and the base steel sheet is coated with the ¶ phase, and a ratio of an interface formed between ¶ grains in which coarse oxides are present among ¶ grains and the base steel sheet with respect to the entire interface between the ¶ phase and the base steel sheet in the hot-dip galvanized layer is 50% or less, the base steel sheet has predetermined chemical components and a refined layer in direct contact with the interface between the base steel sheet and the hot-dip galvanized layer, an average thickness of the refined layer is 0.1 to 5.0 µm, an average grain size of ferrite in the refined layer is 0.1 to 3.0 µm, one or two or more of oxides of Si and Mn are contained in the refined layer, and a maximum size of the oxide is 0.01 to 0.4 µm.

Hiroyuki Kawada
Ken Yasui
Kohei Ueda
Naoki Maruyama
Yuji Yamaguchi
Satoshi Uchida
Ryosuke Komami
Arai Hayato
Nakamura Noboru Mitsuyo

JP2016557817A

May 29, 2019

November 05, 2015

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Nippon Steel Corporation

C23C2/06; C22C18/00; C22C18/04; C22C38/00; C22C38/06; C22C38/58; C23C2/02; C23C2/26

JP2013541645A
JP2002167656A
JP9157821A
JP9157819A
JP5112575B1

WO2013047760A1

Sumio Tanai
Mitsuo Teramoto
Tomoo Katsumata
Hiroshi Yamaguchi
Masatake Shiga

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