Steel sheet for hot press formed member having excellent painting adhesion and post-painting corrosion resistance
AssigneePosco
InventorsJin-Keun Oh, Seong-Woo Kim, Hyeon-Jeong Shin, A-Ra Cho
Life of this patent
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Abstract
Provided is a steel sheet for a hot press formed member having excellent painting adhesion and post-painting corrosion resistance, and a method for manufacturing the same. A steel sheet for hot press forming according to one aspect of the present invention comprises a base steel sheet and a plated layer formed on a surface of the base steel sheet, wherein the ratio of an area occupied by pores to the entire area of a surface layer portion may be 10% or more in a cross section of the surface layer portion observed when the plated layer is cut in a thickness direction thereof.
Claims5
A steel sheet for a hot press formed member having excellent painting adhesion and post-painting corrosion resistance, the steel sheet comprising:
- a base steel sheet;
- and
- an aluminum alloy plated layer formed on a surface of the base steel sheet,
- wherein a ratio of an area occupied by closed pores to an entire area of a surface layer portion is 10% or more, the surface layer portion being defined by a region within 10 μm depth from a surface of the aluminum alloy plated layer in a cross-section taken in a thickness direction of the aluminum alloy plate layer, and
- wherein an average content of Fe in the aluminum alloy plated layer is 30 wt % or more.
Dependencies are inferred from the claim text.