Aluminum-iron alloy-coated steel sheet for hot press forming, having excellent hydrogen delayed fracture resistance, peeling resistance, and weldability and hot-formed member using same
US-2019003029-A1 · Jan 3, 2019 · US
Steel sheet for hot press formed member having excellent painting adhesion and post-painting corrosion resistance
US11141953B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11141953-B2 |
| Application number | US-201816617798-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 31, 2018 |
| Priority date | Jun 1, 2017 |
| Publication date | Oct 12, 2021 |
| Grant date | Oct 12, 2021 |
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Abstract
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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.
First claim
Opening claim text (preview).
The invention claimed is: 1. 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. 2. The steel sheet of claim 1 , wherein the ratio is 15% or more. 3. The steel sheet claim 1 , wherein the average content of Fe is 40 wt % or more. 4. The steel sheet of claim 1 , wherein the base steel sheet has a composition including, by wt %, carbon (C): 0.04 to 0.5%, silicon (Si): 0.01 to 2%, manganese (Mn): 0.01 to 10%, aluminum(Al): 0.001 to 1.0%, phosphorus(P): 0.05% to 0.001%, sulfur (S): 0.02% to 0.0001%, nitrogen (N): 0.02% to 0.001%, and a balance of iron (Fe) and inevitable impurities. 5. The steel sheet of claim 4 , wherein the composition of the base steel sheet further comprises, by wt %, one or more among a sum of one or more selected from the group consisting of Cr, Mo, and W: 0.01 to 4.0%, a sum of one or more selected from the group consisting of Ti, Nb, Zr, and V: 0.001 to 0.4%, Cu+Ni: 0.005 to 2.0%, Sb+Sn: 0.001 to 1.0%, and B: 0.0001 to 0.01%.
Assignees
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Classifications
Fe-base component · CPC title
Porous [e.g., foamed, spongy, cracked, etc.] · CPC title
foamed in situ · CPC title
characterised by features of a layer {of} foamed material · CPC title
Heating or cooling · CPC title
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- What does patent US11141953B2 cover?
- 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 …
- Who is the assignee on this patent?
- Posco
- What technology area does this patent fall under?
- Primary CPC classification B21D35/00. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Oct 12 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).