Oriented electrical steel sheet with excellent magnetic properties and method for manufacturing same
US-2017369959-A1 · Dec 28, 2017 · US
Hot-stamped body
US2021039354A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021039354-A1 |
| Application number | US-201816979820-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 20, 2018 |
| Priority date | Mar 20, 2018 |
| Publication date | Feb 11, 2021 |
| Grant date | — |
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- Title
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Abstract
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There is provided a hot-stamped body including: a steel base metal; and a metallic layer formed on a surface of the steel base metal, wherein the metallic layer includes: an interface layer that contains, in mass %, Al: 30.0 to 36.0%, has a thickness of 100 nm to 5 μm, and is located in an interface between the metallic layer and the steel base metal; and a principal layer that includes coexisting MgZn 2 phases and insular FeAl 2 phases, is located on the interface layer, and has a thickness of 3 μm to 40 μm.
First claim
Opening claim text (preview).
1 . A hot-stamped body comprising: a steel base metal; and a metallic layer formed on a surface of the steel base metal, wherein the metallic layer includes an interface layer and a principal layer, the interface layer contains, in mass %, Al: 30.0 to 36.0%, has a thickness of 100 nm to 5 μm, and is located in an interface between the metallic layer and the steel base metal, the principal layer includes coexisting MgZn 2 phases and insular FeAl 2 phases, has a thickness of 3 μm to 40 μm, and is located on the interface layer, an average composition of the metallic layer consists of, in mass %: Al: 20.0 to 45.0%; Fe: 10.0 to 45.0%; Mg: 2.0 to 10.0%; Sb: 0 to 0.5%; Pb: 0 to 0.5%; Cu: 0 to 1.0%; Sn: 0 to 1.0%; Ti: 0 to 1.0%; Ca: 0 to 3.0%; Sr: 0 to 0.5%; Cr: 0 to 1.0%; Ni: 0 to 1.0%; Mn: 0 to 1.0%; Si: 0 to 1.0%; and the balance: 12.0 to 45.0% of Zn and impurities, in the principal layer, the MgZn 2 phases each contain, in mass %: Mg: 13.0 to 20.0%. Zn: 70.0 to 87.0%; Al: 0 to 8.0%; and Fe: 0 to 5.0%, and in the principal layer, the FeAl 2 phases each contain, in mass %: Al: 40.0 to 55.0%; Fe: 40.0 to 55.0%; and Zn: 0 to 15.0%. 2 . The hot-stamped body according to claim 1 , wherein in the principal layer, a volume fraction of the FeAl 2 phases is 50.0 to 80.0%, and a volume fraction of the MgZn 2 phases is 20.0 to 50.0%. 3 . The hot-stamped body according to claim 1 , wherein in the principal layer, a volume fraction of the FeAl 2 phases is 60.0 to 75.0%, and a volume fraction of the MgZn 2 phases is 25.0 to 45.0%. 4 . The hot-stamped body according to claim 2 , wherein in the principal layer, a volume fraction of the FeAl 2 phases is 60.0 to 75.0%, and a volume fraction of the MgZn 2 phases is 25.0 to 45.0%. 5 . A hot-stamped body comprising: a steel base metal; and a metallic layer formed on a surface of the steel base metal, wherein the metallic layer includes an interface layer and a principal layer, the interface layer contains, in mass %, Al: 30.0 to 36.0%, has a thickness of 100 nm to 5 μm, and is located in an interface between the metallic layer and the steel base metal, the principal layer includes coexisting MgZn 2 phases and insular FeAl 2 phases, has a thickness of 3 μm to 40 μm, and is located on the interface layer, an average composition of the metallic layer comprises, in mass %: Al: 20.0 to 45.0%; Fe: 10.0 to 45.0%; Mg: 2.0 to 10.0%; Sb: 0 to 0.5%; Pb: 0 to 0.5%; Cu: 0 to 1.0%; Sn: 0 to 1.0%; Ti: 0 to 1.0%; Ca: 0 to 3.0%; Sr: 0 to 0.5%; Cr: 0 to 1.0%; Ni: 0 to 1.0%; Mn: 0 to 1.0%; Si: 0 to 1.0%; and the balance: 12.0 to 45.0% of Zn and impurities, in the principal layer, the MgZn 2 phases each contain, in mass %: Mg: 13.0 to 20.0%. Zn: 70.0 to 87.0%; Al: 0 to 8.0%; and Fe: 0 to 5.0%, and in the principal layer, the FeAl 2 phases each contain, in mass %: Al: 40.0 to 55.0%; Fe: 40.0 to 55.0%; and Zn: 0 to 15.0%.
Assignees
Inventors
Classifications
Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment (hardening articles or materials formed by forging or rolling with no further heating beyond that required for the formation C21D1/02) · CPC title
Cooling or quenching · CPC title
Thermal after-treatment, e.g. treatment in oil bath · CPC title
- C23C2/261Primary
in a gas atmosphere, e.g. inert or reducing atmosphere · CPC title
1 mil or less · CPC title
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Frequently asked questions
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- What does patent US2021039354A1 cover?
- There is provided a hot-stamped body including: a steel base metal; and a metallic layer formed on a surface of the steel base metal, wherein the metallic layer includes: an interface layer that contains, in mass %, Al: 30.0 to 36.0%, has a thickness of 100 nm to 5 μm, and is located in an interface between the metallic layer and the steel base metal; and a principal layer that includes coexist…
- Who is the assignee on this patent?
- Nippon Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C23C2/261. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Feb 11 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).