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High Cr ferritic/martensitic steels having an improved creep resistance for in-core component materials in nuclear reactor, and preparation method thereof
US9598750B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9598750-B2 |
| Application number | US-201113280585-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 25, 2011 |
| Priority date | Oct 26, 2010 |
| Publication date | Mar 21, 2017 |
| Grant date | Mar 21, 2017 |
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Abstract
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Disclosed herein is a high Cr Ferritic/Martensitic steel comprising 0.04 to 0.13% by weight of carbon, 0.03 to 0.07% by weight of silicon, 0.40 to 0.50% by weight of manganese, 0.40 to 0.50% by weight of nickel, 8.5 to 9.5% by weight of chromium, 0.45 to 0.55% by weight of molybdenum, 0.10 to 0.25% by weight of vanadium, 0.02 to 0.10% by weight of tantalum, 0.21 to 0.25% by weight of niobium, 1.5 to 3.0% by weight of tungsten, 0.015 to 0.025% by weight of nitrogen, 0.01 to 0.02% by weight of boron and iron balance. By regulating the contents of alloying elements such as nitrogen, born, the high Cr Ferritic/Martensitic steel with superior tensile strength and creep resistance is provided, and can be effectively used as an in-core component material for sodium-cooled fast reactor (SFR).
First claim
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What is claimed is: 1. A high Cr ferritic and martensitic steel consisting of 0.04 to 0.13% by weight of carbon, 0.03 to 0.07% by weight of silicon, 0.40 to 0.50% by weight of manganese, 0.40 to 0.50% by weight of nickel, 8.5 to 9.5% by weight of chromium, 0.45 to 0.55% by weight of molybdenum, 0.10 to 0.25% by weight of vanadium, 0.02 to 0.05% by weight of tantalum, 0.21 to 0.25% by weight of niobium, 1.5 to 3.0% by weight of tungsten, 0.015 to 0.025% by weight of nitrogen, 0.015% by weight of boron and iron balance. 2. An in-core component in a nuclear reactor, wherein the in-core component comprises the high Cr ferritic and martensitic steel according to claim 1 . 3. The in-core component as set forth in claim 2 , wherein the nuclear reactor is a sodium-cooled fast reactor (SFR). 4. The in-core component as set forth in claim 2 , wherein the in-core component is one selected from the group consisting of a nuclear fuel cladding tube, a duct, and a wire wrap. 5. A high Cr ferritic and martensitic steel according to claim 1 , wherein its rupture time measured with 140 MPa at a temperature of 650° C. is 2928 hour or higher than 2928 hour. 6. A high Cr ferritic and martensitic steel according to claim 1 , wherein the steel consists of 0.065% by weight of carbon, 0.043% by weight of silicon, 0.45% by weight of manganese, 0.44% by weight of nickel, 9.04% by weight of chromium, 0.5% by weight of molybdenum, 0.2% by weight of vanadium, 0.05% by weight of tantalum, 0.21% by weight of niobium, 1.99% by weight of tungsten, 0.02% by weight of nitrogen, 0.015% by weight of boron, and iron balance. 7. A high Cr ferritic and martensitic steel according to claim 6 , wherein its rupture time measured with 140 MPa at a temperature of 650° C. is 5216 hour or higher than 5216 hour. 8. A high Cr ferritic and martensitic steel according to claim 7 , wherein its rupture time measured with 140 MPa at a temperature of 650° C. is 5216 hour. 9. A high Cr ferritic and martensitic steel according to claim 1 , wherein the steel consists of 0.069% by weight of carbon, 0.042% by weight of silicon, 0.452% by weight of manganese, 0.450% by weight of nickel, 9.1% by weight of chromium, 0.51% by weight of molybdenum, 0.107% by weight of vanadium, 0.05% by weight of tantalum, 0.21% by weight of niobium, 2.0% by weight of tungsten, 0.02% by weight of nitrogen, 0.015% by weight of boron, and iron balance. 10. A high Cr ferritic and martensitic steel according to claim 9 , wherein its rupture time measured with 140 MPa at a temperature of 650° C. is 2928 hour or higher than 2928 hour.
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- What does patent US9598750B2 cover?
- Disclosed herein is a high Cr Ferritic/Martensitic steel comprising 0.04 to 0.13% by weight of carbon, 0.03 to 0.07% by weight of silicon, 0.40 to 0.50% by weight of manganese, 0.40 to 0.50% by weight of nickel, 8.5 to 9.5% by weight of chromium, 0.45 to 0.55% by weight of molybdenum, 0.10 to 0.25% by weight of vanadium, 0.02 to 0.10% by weight of tantalum, 0.21 to 0.25% by weight of niobium, 1…
- Who is the assignee on this patent?
- Kim Sung Ho, Baek Jong Hyuk, Kim Tae Kyu, and 8 more
- What technology area does this patent fall under?
- Primary CPC classification C22C38/001. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 21 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).