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Title:
HOT-DIP AL-PLATED STEEL SHEET PRODUCTION METHOD, AND HOT-DIP AL-PLATED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2019/186645
Kind Code:
A1
Abstract:
Provided is a hot-dip Al-plated steel sheet production method in which fine spangles are stably formed on a surface of a plating layer. The hot-dip Al-plated steel sheet production method includes a composition adjustment step for adjusting the composition of a hot-dip Al-plating bath (3) having aluminium as the main component so that a matrix alloy including B is added so that the concentration of B is at least 0.005 mass%, and so that the concentration of K is more than 0 mass% and less than 0.0005 mass%; and gas is supplied into the hot-dip Al-plating bath and floating substances on the bath surface are removed, thereby lowering the concentration of K in the hot-dip Al-plating bath.

Inventors:
FURUKAWA, Shinya (4-1, Marunouchi 3 chome, Chiyoda-k, Tokyo 66, 〒1008366, JP)
ISHII, Koutarou (4-1, Marunouchi 3 chome, Chiyoda-k, Tokyo 66, 〒1008366, JP)
HATTORI, Yasunori (4-1, Marunouchi 3 chome, Chiyoda-k, Tokyo 66, 〒1008366, JP)
Application Number:
JP2018/012124
Publication Date:
October 03, 2019
Filing Date:
March 26, 2018
Export Citation:
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Assignee:
NISSHIN STEEL CO., LTD. (4-1 Marunouchi 3 chome, Chiyoda-ku Tokyo, 66, 〒1008366, JP)
International Classes:
C23C2/12; C22C21/02; C23C2/40
Domestic Patent References:
WO2017154237A12017-09-14
Foreign References:
JPS6223976A1987-01-31
JPH10259442A1998-09-29
DE1138603B1962-10-25
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (Daiwa Minamimorimachi Building, 2-6 Tenjinbashi 2-chome Kita, Kita-ku, Osaka-sh, Osaka 41, 〒5300041, JP)
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