Steel sheet with excellent bake hardening properties and corrosion resistance and method for manufacturing same

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12139779
APP PUB NO 20230092345A1
SERIAL NO

17992245

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Abstract

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Provided is a steel sheet by weight percentage (wt %), carbon (C): 0.005 to 0.08%, manganese (Mn): 1.25% or less (excluding 0%), phosphorus (P): 0.03% or less (excluding 0%), sulfur (S): 0.01% or less (excluding 0%), nitrogen (N): 0.01% or less (excluding 0%), soluble aluminum (sol.Al): 0.01 to 0.06%, chromium (Cr): 1.15 to 2.5%, antimony (Sb): 0.1% or less (excluding 0%), at least one selected from the group consisting of nickel (Ni): 0.3% or less (excluding 0%), silicon (Si): 0.3% or less (excluding 0%), molybdenum (Mo): 0.2% or less (excluding 0%), and boron (B): 0.003% or less (excluding 0%), and a remainder of iron (Fe) and other unavoidable impurities, satisfying Expression 1: 1.3≤Mn(wt %)+Cr(wt %)/1.5+Sb(wt %)≤2.7, where Mn, Cr, and Sb refer to contents (wt %) of corresponding elements, respectively; and 1 to 5% of martensite and a remainder of ferrite by an area percentage (area %).

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Patent Owner(s)

Patent OwnerAddress
POSCO CO LTDPOHANG-SI GYEONGSANGBUK-DO 37859

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Han, Sang-Ho Gwangyang-si, KR 46 282
Lee, Je-Woong Gwangyang-si, KR 11 8

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