Title:
METHOD FOR PRODUCING ATOMIZED METAL POWDER
Document Type and Number:
WIPO Patent Application WO/2019/111951
Kind Code:
A1
Abstract:
[Problem] To provide a method for producing an atomized metal powder with a high rate of amorphization by water atomization. [Solution] A method for producing an atomized metal powder with an amorphization rate of at least 90% by jetting high pressure water that collides with molten metal that is falling in the vertical direction to fragment the molten metal and form metal powder and cooling said metal powder, wherein: the collision pressure when the high pressure water collides with the molten metal is set to be at least 20 MPa; and the temperature of the molten metal and/or the temperature of the high pressure water is adjusted so that the high pressure water is in a subcritical state or a supercritical state at the surface of collision with the molten metal.
Inventors:
NAKASEKO MAKOTO (JP)
NAKAMURA NAOMICHI (JP)
KOBAYASHI AKIO (JP)
TAKASHITA TAKUYA (JP)
NAKAMURA NAOMICHI (JP)
KOBAYASHI AKIO (JP)
TAKASHITA TAKUYA (JP)
Application Number:
PCT/JP2018/044727
Publication Date:
June 13, 2019
Filing Date:
December 05, 2018
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B22F9/08; C22C38/00
Domestic Patent References:
| WO2016157762A1 | 2016-10-06 | |||
| WO2010084900A1 | 2010-07-29 |
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Other References:
MATERIA JAPAN, vol. 41, no. 6, pages 392
THE JOURNAL OF APPLIED PHYSICS, vol. 105, 2009, pages 013922
HIDEO TORAYA, JOURNAL OF THE CRYSTALLOGRAPHIC SOCIETY OF JAPAN, vol. 30, no. 4, 1988, pages 253 - 258
See also references of EP 3722028A4
THE JOURNAL OF APPLIED PHYSICS, vol. 105, 2009, pages 013922
HIDEO TORAYA, JOURNAL OF THE CRYSTALLOGRAPHIC SOCIETY OF JAPAN, vol. 30, no. 4, 1988, pages 253 - 258
See also references of EP 3722028A4
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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