Magnetic core and coil component using same
US-2016336104-A1 · Nov 17, 2016 · US
Machine component made of ferrous sintered metal
US11035027B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11035027-B2 |
| Application number | US-201815949303-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 10, 2018 |
| Priority date | Sep 12, 2012 |
| Publication date | Jun 15, 2021 |
| Grant date | Jun 15, 2021 |
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- Title
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- Abstract
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Abstract
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Raw material powder containing iron powder, copper powder, and tin powder is compressed to form a green compact. The green compact is sintered in a temperature range of from 750 to 900° C., to bond iron structures to each other with copper and tin.
First claim
Opening claim text (preview).
The invention claimed is: 1. An oil seal for a variable valve timing mechanism, comprising an iron-based sintered metal and a slide surface formed on the iron-based sintered metal, the iron-based sintered metal having an iron structure, wherein 95 wt % or more of the iron structure is formed of ferrite phase, and wherein the iron-based sintered metal has blended therein copper and tin for bonding the iron structures to each other, wherein the iron-based sintered metal consists of copper, tin, carbon, and iron. 2. The oil seal for a variable valve timing mechanism according to claim 1 , wherein the iron structures are bonded to each other with a copper-tin alloy. 3. The oil seal for a variable valve timing mechanism according to claim 1 , wherein at least some of the carbon exists as free graphite. 4. The oil seal for a variable valve timing mechanism according to claim 3 , wherein the iron-based sintered metal consists of 1 to 10 wt % of copper, 0.5 to 2 wt % of tin, and 0.1 to 0.5 wt % of carbon, with the balance being iron. 5. The oil seal for a variable valve timing mechanism according to claim 1 , wherein the machine part has a blending ratio of tin to copper of 1/5 or more and 1 or less in terms of weight ratio.
Assignees
Inventors
Classifications
containing inorganic lubricating or binding agents, e.g. metal salts · CPC title
Using particular materials · CPC title
Making porous workpieces or articles · CPC title
containing copper · CPC title
Both compacting and sintering (by forging B22F3/17) · CPC title
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Frequently asked questions
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- What does patent US11035027B2 cover?
- Raw material powder containing iron powder, copper powder, and tin powder is compressed to form a green compact. The green compact is sintered in a temperature range of from 750 to 900° C., to bond iron structures to each other with copper and tin.
- Who is the assignee on this patent?
- Mouri Toshihiko, NAGATA Hiroharu, Ntn Toyo Bearing Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C22C33/0257. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 15 2021 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).