Low-density clad steel sheet having excellent formability and fatigue property and manufacturing method therefor
US-2024326399-A1 · Oct 3, 2024 · US
Maraging steel excellent in fatigue characteristics
US10119186B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10119186-B2 |
| Application number | US-201414450453-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 4, 2014 |
| Priority date | Aug 23, 2013 |
| Publication date | Nov 6, 2018 |
| Grant date | Nov 6, 2018 |
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Abstract
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Provided is a maraging steel excellent in fatigue characteristics, including, in terms of % by mass: C: ≤0.015%, Ni: from 12.0 to 20.0%, Mo: from 3.0 to 6.0%, Co: from 5.0 to 13.0%, Al: from 0.01 to 0.3%, Ti: from 0.2 to 2.0%, O: ≤0.0020%, N: ≤0.0020%, and Zr: from 0.001 to 0.02%, with the balance being Fe and unavoidable impurities.
First claim
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What is claimed is: 1. A maraging steel, consisting of, in terms of % by mass: C: ≤0.015%, Ni: 12.0 to 20.0%, Mo: 3.0 to 6.0%, Co: 5.0 to 13.0%, Al: 0.01 to 0.3%, Ti: 0.2 to 2.0%, O: ≤0.0020%, N: 0.0005 to 0.0020%, Zr: from 0.001 to 0.02%, and optionally one or more of: B: from 0.0010 to 0.010%, Mg: ≤0.003%, and Ca: ≤0.003% with the balance being Fe and unavoidable impurities, wherein the maraging steel comprises at least one TiN or TiCN inclusion with ZrO 2 present in a center part thereof. 2. The maraging steel according to claim 1 , the content of Zr being 0.001 to 0.008% by mass. 3. A thin steel sheet having a thickness of 0.5 mm or less and consisting of the maraging steel according to claim 1 . 4. A maraging steel consisting of, in terms of % by mass: C: ≤0.015%, Ni: 12.0 to 20.0%, Mo: 3.0 to 6.0%, Co: 5.0 to 13.0%, Al: 0.01 to 0.3%, Ti: 0.2 to 2.0%, O: ≤0.0020%, N: 0.0005 to 0.0020%, Zr: from 0.001 to 0.02%, and optionally one or more of: B: from 0.0010 to 0.010%, Mg: ≤0.003%, and Ca: ≤0.003% with the balance being Fe and unavoidable impurities, wherein the maraging steel comprises at least one TiN or TiCN inclusion with ZrO 2 present in a center part thereof and the maraging steel has a fatigue characteristic, when tested according to the method of JIS Z 2273 (2010), of 10 7 repetitions or more. 5. The maraging steel according to claim 4 , the content of Zr being 0.001 to 0.008% by mass. 6. A thin steel sheet having a thickness of 0.5 mm or less and consisting of the maraging steel according to claim 4 .
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Classifications
containing tungsten, tantalum, molybdenum, vanadium, or niobium · CPC title
with cobalt · CPC title
- C22C38/14Primary
containing titanium or zirconium · CPC title
containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60 · CPC title
containing aluminium · CPC title
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- What does patent US10119186B2 cover?
- Provided is a maraging steel excellent in fatigue characteristics, including, in terms of % by mass: C: ≤0.015%, Ni: from 12.0 to 20.0%, Mo: from 3.0 to 6.0%, Co: from 5.0 to 13.0%, Al: from 0.01 to 0.3%, Ti: from 0.2 to 2.0%, O: ≤0.0020%, N: ≤0.0020%, and Zr: from 0.001 to 0.02%, with the balance being Fe and unavoidable impurities.
- Who is the assignee on this patent?
- Sugiyama Kenji, Ueta Shigeki, Daido Steel Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C22C38/14. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 06 2018 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).