Friction stir welding using a pcbn-based tool
US-2024116131-A1 · Apr 11, 2024 · US
Heat resistant alloy member, method for manufacturing the same, and method for repairing the same
US9457422B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9457422-B2 |
| Application number | US-201213529156-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 21, 2012 |
| Priority date | Jun 21, 2011 |
| Publication date | Oct 4, 2016 |
| Grant date | Oct 4, 2016 |
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Abstract
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A heat resistant alloy member that maintains the creep strength and improves the fatigue characteristics is provided. The heat resistant alloy member according to the present invention includes a recrystallized structure layer including finer grains on the surface of the member than those inside of the member. The recrystallized structure layer is formed by forming a stirred layer by giving processing strain to the surface of the member using a friction stir processing, and applying recrystallization heat treatment to the stirred layer for recrystallization.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for manufacturing a heat resistant alloy member, the member being made of a Ni-based alloy and comprising a coarse grain layer, the method comprising the steps of: forming a stirred layer by giving processing strain to at least a part of the surface of the coarse grain layer using a friction stir processing, and forming a recrystallized structure layer including finer grains than the coarse grain layer, by applying recrystallization heat treatment to the stirred layer for recrystallization, whereby: the recrystallized structure layer is composed of grains having an average size of 1 μm or more and 100 μm or less, and a thickness of the recrystallized structure layer is 1 mm or more and 5 mm or less. 2. The method for manufacturing the heat resistant alloy member according to claim 1 , wherein the stirred layer is provided at least on a portion of the surface of the coarse grain layer where fatigue damages are expected to be incurred. 3. The method for manufacturing the heat resistant alloy member according to claim 1 , wherein the coarse grain layer is composed of grains having an average size of 1 mm or more. 4. The method for manufacturing the heat resistant alloy member according to claim 3 , wherein the stirred layer is provided at least on a portion of the surface of the coarse grain layer where fatigue damages are expected to be incurred. 5. A method for repairing a heat resistant alloy member, the member being made of a Ni-based alloy and comprising a coarse grain layer, the method comprising the steps of: forming a stirred layer by giving processing strain using a friction stir processing to at least a portion of the surface of the member where cracks have occurred due to fatigue damage, and forming a recrystallized structure layer including finer grains than the coarse grain layer, by applying recrystallization heat treatment to the stirred layer for recrystallization, whereby: the recrystallized structure layer is composed of grains having an average size of 1 μm or more and 100 μm or less, and a thickness of the recrystallized structure layer is 1 mm or more and 5 mm or less.
Assignees
Inventors
Classifications
- B23K20/1255Primary
Tools therefor, e.g. characterised by the shape of the probe · CPC title
Operations & Transport · mapped topic
Operations & Transport · mapped topic
involving metallurgical change · CPC title
Iron or ferrous alloys · CPC title
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- What does patent US9457422B2 cover?
- A heat resistant alloy member that maintains the creep strength and improves the fatigue characteristics is provided. The heat resistant alloy member according to the present invention includes a recrystallized structure layer including finer grains on the surface of the member than those inside of the member. The recrystallized structure layer is formed by forming a stirred layer by giving pro…
- Who is the assignee on this patent?
- Kamoshida Hironori, Imano Shinya, Yoshida Takehiko, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification B23K20/1255. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Oct 04 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).