US 11,753,709 B2
Hot-dip galvanized steel material having excellent weldability and press workability and manufacturing method therefor
Suk-Kyu Lee, Gwangyang-si (KR); Sang-Heon Kim, Gwangyang-si (KR); Kwang-Tai Min, Gwangyang-si (KR); and Yon-Kyun Song, Gwangyang-si (KR)
Assigned to POSCO CO., LTD, Pohang-si (KR)
Appl. No. 16/471,289
Filed by POSCO, Pohang-si (KR)
PCT Filed Dec. 21, 2017, PCT No. PCT/KR2017/015292
§ 371(c)(1), (2) Date Jun. 19, 2019,
PCT Pub. No. WO2018/117714, PCT Pub. Date Jun. 28, 2018.
Claims priority of application No. 10-2016-0177190 (KR), filed on Dec. 22, 2016.
Prior Publication US 2020/0017946 A1, Jan. 16, 2020
Int. Cl. C23C 2/06 (2006.01); C22C 18/00 (2006.01); C23C 2/26 (2006.01)
CPC C23C 2/06 (2013.01) [C22C 18/00 (2013.01); C23C 2/26 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A hot-dip galvanized steel material comprising:
base steel and a hot-dip galvanized layer disposed on the base steel,
wherein the hot-dip galvanized layer comprise, by wt %, 0.01 to 0.5% of Al, 0.01 to 1.5% of Mg, 0.05 to 1.5% of Mn, 0.1 to 6% of Fe, and a balance of Zn and inevitable impurities, and
a Zn—Fe—Mn based alloy phase is present at an interface between the base steel and the hot-dip galvanized layer, and
a ratio of an area of the Zn—Fe—Mn based alloy phase to an area of the hot-dip galvanized layer is 1% to 60%.