Soft magnetic powder, powder magnetic core, magnetic element, and electronic device
US-9991036-B2 · Jun 5, 2018 · US
Method of producing atomized metal powder
US10293407B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10293407-B2 |
| Application number | US-201515129839-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 13, 2015 |
| Priority date | Mar 31, 2014 |
| Publication date | May 21, 2019 |
| Grant date | May 21, 2019 |
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- Title
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Abstract
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A water-atomized metal powder is produced by dividing a molten metal stream into a metal powder by making injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more impinge on the molten metal stream and cooling the metal powder. Cooling with injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more enables can be performed not in the film boiling region but in the transition boiling region from the beginning of cooling. A gas-atomized metal powder may also be produced by dividing a molten metal stream into a metal powder by making an inert gas impinge on the molten metal stream and cooling the metal powder with injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of producing an atomized metal powder comprising dividing a molten metal stream into a metal powder by making a fluid impinge on the molten metal stream; and cooling the metal powder, the fluid being injection water having a temperature of 10° C. or less and an injection pressure of 5 MPa to 20 MPa, the fluid being used to divide the molten metal stream and cool the metal powder. 2. The method according to claim 1 , wherein the molten metal stream includes a Fe—B alloy or a Fe—Si—B alloy, and the atomized metal powder is an amorphous metal powder. 3. A method of producing an atomized metal powder comprising dividing a molten metal stream into a metal powder by making a fluid impinge on the molten metal stream; and cooling the metal powder, the fluid being an inert gas, the fluid being used to divide the molten metal stream, cooling of the metal powder being performed with injection water having a temperature of 10° C. or less and an injection pressure of 5 MPa or more. 4. The method according to claim 3 , wherein the impinging the injection water is performed after a temperature of the metal powder has reached 1000° C. or less. 5. The method according to claim 4 , wherein the molten metal stream includes a Fe—B alloy or a Fe—Si—B alloy, and the atomized metal powder is an amorphous metal powder. 6. The method according to claim 3 , wherein the molten metal stream includes a Fe—B alloy or a Fe—Si—B alloy, and the atomized metal powder is an amorphous metal powder.
Assignees
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Classifications
amorphous or microcrystalline · CPC title
by water · CPC title
the maximum content of each alloying element not exceeding 5% · CPC title
Melting process before atomisation · CPC title
with water · CPC title
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- What does patent US10293407B2 cover?
- A water-atomized metal powder is produced by dividing a molten metal stream into a metal powder by making injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more impinge on the molten metal stream and cooling the metal powder. Cooling with injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more ena…
- Who is the assignee on this patent?
- Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification B22F9/082. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 21 2019 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).