Bake-hardened hot-dip galvanized steel sheet with excellent powdering resistance, and manufacturing method therefor

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United States of America

PATENT NO 12180559
APP PUB NO 20240011116A1
SERIAL NO

18035925

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Abstract

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Provided are a bake-hardened hot-dip galvanized steel sheet with excellent powdering resistance, and a manufacturing method therefor. The bake-hardened hot-dip galvanized steel sheet comprises, by wt %, 0.0001-0.005% of carbon (C), 0.1-1.2% of manganese (Mn), 0.02% or less of silicon (Si) (excluding 0%), 0.01-0.04% of phosphorus (P), 0.01% or less of sulfur (S) (excluding 0%), 0.01% or less of nitrogen (N) (excluding 0%), 0.01-0.06% of aluminum (sol.Al), 0.003-0.015% of niobium (Nb), 0.0005-0.0035% of boron (B), 0.01-0.1% of chromium (Cr), 0.005-0.05% of molybdenum (Mo), 0.003% or less of titanium (Ti) (excluding 0%), and the balance of Fe and inevitable impurities, and satisfies relationships 1 and 2, wherein the microstructure thereof is ferrite single phase and satisfies relationship 3.

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Patent Owner(s)

Patent OwnerAddress
POSCO CO LTDGYEONGSANGBUK-DO POHANG-SI

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ha, Yu-Mi Gwangyang-si, KR 11 6
Han, Seong-Ho Gwangyang-si, KR 15 28
Kim, Chung-Won Gwangyang-si, KR 3 23
Kim, Sang-Hyun Gwangyang-si, KR 68 497

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