Superalloy target
US-11866805-B2 · Jan 9, 2024 · US
Ni based forged alloy, and turbine disc, turbine spacer and gas turbine each using the same
US9512731B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9512731-B2 |
| Application number | US-201414300255-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 10, 2014 |
| Priority date | Jun 10, 2013 |
| Publication date | Dec 6, 2016 |
| Grant date | Dec 6, 2016 |
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Abstract
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The Ni based forged alloy has a composition containing, on the basis of mass percent, Al: 0.5 to 1.0%, Cr: 17 to 21%, Fe: 17 to 19%, Nb: 4.5 to 5.5%, Ti: 0.8 to 1.3%, W: 3.0 to 6.0%, B: 0.001 to 0.03%, C: 0.001 to 0.015%, and Mo: 1.0% or less, the balance being Ni and inevitable impurities. The alloy includes carbide grains of the contained elements. The carbide grains have an average grain diameter of 20 μm or less. Thus, a Ni based forged alloy is provided which is excellent in high-temperature fatigue property and has a moderate macrosegregation property.
First claim
Opening claim text (preview).
What is claimed is: 1. A turbine disc including the Ni based forged alloy having a composition containing, on the basis of mass percent: Al: 0.5 to 1.0%, Cr: 17 to 21%, Fe: 17 to 19%, Nb: 4.5 to 5.5%, Ti: 0.8 to 1.3%, W: 3.0 to 6.0%, B: 0.001 to 0.03%, C: 0.001 to 0.015%, and Mo: 1.0% or less, the balance being Ni and inevitable impurities, the alloy including carbide grains of the contained elements, wherein the carbide grains have an average grain diameter of 20 μm or less; and the turbine disc having a mass of 0.6 ton or more. 2. A turbine spacer including the Ni based forged alloy having a composition containing, on the basis of mass percent: Al: 0.5 to 1.0%, Cr: 17 to 21%, Fe: 17 to 19%, Nb: 4.5 to 5.5%, Ti: 0.8 to 1.3%, W: 3.0 to 6.0%, B: 0.001 to 0.03%, C: 0.001 to 0.015%, and Mo: 1.0% or less, the balance being Ni and inevitable impurities, the alloy including carbide grains of the contained elements, wherein the carbide grains have an average grain diameter of 20 μm or less; and the turbine spacer having a mass of 0.25 ton or more. 3. A gas turbine including a turbine disc and/or turbine spacer including the Ni based forged alloy having a composition containing, on the basis of mass percent: Al: 0.5 to 1.0%, Cr: 17 to 21%, Fe: 17 to 19%, Nb: 4.5 to 5.5%, Ti: 0.8 to 1.3%, W: 3.0 to 6.0%, B: 0.001 to 0.03%, C: 0.001 to 0.015%, and Mo: 1.0% or less, the balance being Ni and inevitable impurities, the alloy including carbide grains of the contained elements, wherein the carbide grains have an average grain diameter of 20 μm or less; and the gas turbine giving a power of 50 MW or more. 4. The gas turbine according to claim 3 , wherein the turbine disc has a mass of 0.6 ton or more and/or the turbine spacer has a mass of 0.25 ton or more.
Assignees
Inventors
Classifications
with chromium · CPC title
- F01D5/28Primary
Selecting particular materials; {Particular measures relating thereto;} Measures against erosion or corrosion · CPC title
Electroslag remelting {(electroslag casting B22D23/10)} · CPC title
Alloys · CPC title
Size or power range of the machines · CPC title
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- What does patent US9512731B2 cover?
- The Ni based forged alloy has a composition containing, on the basis of mass percent, Al: 0.5 to 1.0%, Cr: 17 to 21%, Fe: 17 to 19%, Nb: 4.5 to 5.5%, Ti: 0.8 to 1.3%, W: 3.0 to 6.0%, B: 0.001 to 0.03%, C: 0.001 to 0.015%, and Mo: 1.0% or less, the balance being Ni and inevitable impurities. The alloy includes carbide grains of the contained elements. The carbide grains have an average grain dia…
- Who is the assignee on this patent?
- Mitsubishi Hitachi Power Sys
- What technology area does this patent fall under?
- Primary CPC classification F01D5/28. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 06 2016 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).