Title:
耐ゴーリング性、成形性及びシーラー接着性に優れた溶融亜鉛めっき鋼板及びその製造方法
Document Type and Number:
Japanese Patent JP6768931
Kind Code:
B2
Abstract:
The present invention relates to a hot-rolled galvanizing steel sheet having excellent galling resistance and formability, and a method for manufacturing the same. According to an embodiment of the present invention, provided is a hot-rolled galvanizing steel sheet, comprising: a base steel; and a hot-rolled galvanizing layer formed on the surface of the base steel, wherein the hot-rolled galvanizing layer provides a hot-rolled galvanizing steel sheet having a Mn crystallite having a size of 10 µm or less between the resin dendrites of zinc that form sequins, and in addition, provided is a method for manufacturing a hot-rolled galvanizing steel sheet comprising: depositing a steel sheet to be plated in a hot-rolled galvanizing solution at a temperature of 440 ° C to 480 ° C containing 0.05 to 0.6 wt% of manganese, 99 wt% or more of zinc and unavoidable impurities, applying the plating solution to the same and taking out the same therefrom; then cooling the steel sheet applied with the hot-rolled galvanizing solution to solidify the plating solution and form a plating layer, wherein the cooling is performed at a cooling rate of -10° C/s or lower in a section where a steel sheet has a temperature of 430° C to 410° C.
Inventors:
Kim, Sun-Hong
Fan Hyun-Suk
Lee, Suk-kyu
Jeong, Song-ho
Song, Yong-Gyun
You, Bon-Fan
Fan Hyun-Suk
Lee, Suk-kyu
Jeong, Song-ho
Song, Yong-Gyun
You, Bon-Fan
Application Number:
JP2019510445A
Publication Date:
October 14, 2020
Filing Date:
August 22, 2017
Export Citation:
Assignee:
POSCO
International Classes:
C23C2/06; C22C18/00; C22C18/04; C23C2/02; C23C2/20; C23C2/40
Domestic Patent References:
| JP2007314831A | ||||
| JP2003055751A | ||||
| JP3068749A |
Foreign References:
| KR1020000043794A | ||||
| CN104099550A | ||||
| US20160215376 |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Masakazu Ito
Yuko Hara
Masakazu Ito
Yuko Hara