Title:
PRODUCTION METHOD FOR WATER-ATOMIZED METAL POWDER, AND PRODUCTION DEVICE FOR WATER-ATOMIZED METAL POWDER
Document Type and Number:
WIPO Patent Application WO/2023/119896
Kind Code:
A1
Abstract:
Provided are a production method and a production device for producing a water-atomized metal powder, whereby a metal powder having a degree of amorphization and having high apparent density and high circularity can be produced through a low cost, high-productivity water-atomizing method. In the method for producing a water-atomized metal powder, cooling water is jetted against a falling molten metal flow such that the molten metal flow and the cooling water collide, thereby dividing the molten metal flow into parts to form a metal powder. The cooling water is jetted downward from the perimeter of the molten metal flow and toward the falling molten metal flow so as to gather at a center point. The molten metal flow contacts the cooling water at a position separated at a horizontal distance from the center point by an eccentricity amount E. In the relationship between the eccentricity amount E and the vertical distance L from a leading end of a cooling water nozzle to the center point, the value of E/L is in the range of 0.05-0.20.
Inventors:
NAKASEKO MAKOTO (JP)
UNAMI SHIGERU (JP)
TAKASHITA TAKUYA (JP)
YAMAMOTO NAOKI (JP)
UNAMI SHIGERU (JP)
TAKASHITA TAKUYA (JP)
YAMAMOTO NAOKI (JP)
Application Number:
PCT/JP2022/040910
Publication Date:
June 29, 2023
Filing Date:
November 01, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B22F9/08; C22C45/02; C22C45/04; H01F1/153
Foreign References:
| JPH01219110A | 1989-09-01 | |||
| JP2017509785A | 2017-04-06 | |||
| JP2001226704A | 2001-08-21 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
Download PDF:
Previous Patent: ELECTROMAGNETIC TRIP DEVICE, CIRCUIT BREAKER, AND DISTRIBUTION BOARD
Next Patent: PROBE HEAD
Next Patent: PROBE HEAD