Ni-Based Alloy Pipe or Tube for Nuclear Power
US-2018163285-A1 · Jun 14, 2018 · US
Ni-based alloy pipe for nuclear power
US11215356B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11215356-B2 |
| Application number | US-201816619882-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 7, 2018 |
| Priority date | Jun 8, 2017 |
| Publication date | Jan 4, 2022 |
| Grant date | Jan 4, 2022 |
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Abstract
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An Ni-based alloy pipe for nuclear power has a chemical composition consisting of, in mass percent: C: 0.015 to 0.030%, Si: 0.10 to 0.50%, Mn: 0.10 to 0.50%, P: 0.040% or less, S: 0.015% or less, Cu: 0.01 to 0.20%, Ni: 50.0 to 65.0%, Cr: 19.0 to 35.0%, Mo: 0 to 0.40%, Co: 0.040% or less, Al: 0.30% or less, N: 0.010 to 0.080%, Ti: 0.020 to 0.180%, Zr: 0.010% or less, and Nb: 0.060% or less, the balance: Fe and impurities, and satisfying [(N−Ti×14/48)×d 3 ≥4000] in relation to an average grain diameter, wherein a standard deviation of grain diameters is 20 μm or less, and a hardness of insides of grains is 180 HV or more.
First claim
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The invention claimed is: 1. An Ni-based alloy pipe for nuclear power, having a chemical composition consisting of, in mass percent: C: 0.015 to 0.030%, Si: 0.10 to 0.50%, Mn: 0.10 to 0.50%, P: 0.040% or less, S: 0.015% or less, Cu: 0.01 to 0.20%, Ni: 50.0 to 65.0%, Cr: 19.0 to 35.0%, Mo: 0 to 0.40%, Co: 0.040% or less, Al: 0.30% or less, N: 0.010 to 0.080%, Ti: 0.020 to 0.180%, Zr: 0.010% or less, Nb: 0.060% or less, the balance: Fe and impurities, and satisfying Formula (i) in relation to an average grain diameter, wherein a standard deviation of grain diameters is 20 μm or less, and a hardness of insides of grains is 180 HV or more; (N−Ti×14/48)× d 3 4000 (i) where meanings of symbols in the above formula are as follows, N: an N content in the alloy (mass %) Ti: a Ti content in the alloy (mass %) d: Average grain diameter (μm). 2. The Ni-based alloy pipe for nuclear power according to claim 1 , wherein the Ni-based alloy pipe has an outer diameter of 8 to 25 mm and a wall thickness of 0.6 to 2 mm. 3. An Ni-based alloy pipe for nuclear power, having a chemical composition comprising, in mass percent: C: 0.015 to 0.030%, Si: 0.10 to 0.50%, Mn: 0.10 to 0.50%, P: 0.040% or less, S: 0.015% or less, Cu: 0.01 to 0.20%, Ni: 50.0 to 65.0%, Cr: 19.0 to 35.0%, Mo: 0 to 0.40%, Co: 0.040% or less, Al: 0.30% or less, N: 0.010 to 0.080%, Ti: 0.02.0 to 0.180%, Zr: 0.010% or less, Nb: 0.060% or less, the balance: Fe and impurities, and satisfying Formula (i) in relation to an average grain diameter, wherein a standard deviation of grain diameters is 20 μm or less, and a hardness of insides of grains is 180 HV or more; (N−Ti×14/48)× d 3 4000 (i) where meanings of symbols in the above formula are as follows, N: an N content in the alloy (mass %) Ti: a Ti content in the alloy (mass %) d: Average grain diameter (μm). 4. The Ni-based alloy pipe for nuclear power according to claim 3 , wherein the Ni-based alloy pipe has an outer diameter of 8 to 25 mm and a wall thickness of 0.6 to 2 mm.
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of nickel or cobalt or alloys based thereon · CPC title
- C22C19/053Primary
with the maximum Cr content being at least 30% but less than 40% · CPC title
without Mo and W · CPC title
- F22B37/04Primary
and characterised by material, e.g. use of special steel alloy · CPC title
with the maximum Cr content being at least 20% but less than 30% · CPC title
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- What does patent US11215356B2 cover?
- An Ni-based alloy pipe for nuclear power has a chemical composition consisting of, in mass percent: C: 0.015 to 0.030%, Si: 0.10 to 0.50%, Mn: 0.10 to 0.50%, P: 0.040% or less, S: 0.015% or less, Cu: 0.01 to 0.20%, Ni: 50.0 to 65.0%, Cr: 19.0 to 35.0%, Mo: 0 to 0.40%, Co: 0.040% or less, Al: 0.30% or less, N: 0.010 to 0.080%, Ti: 0.020 to 0.180%, Zr: 0.010% or less, and Nb: 0.060% or less, the …
- Who is the assignee on this patent?
- Nippon Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C22C19/053. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 04 2022 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).