US 11,925,987 B2
Metal powder manufacturing device, and crucible apparatus and molten metal nozzle for metal powder manufacturing device
Takashi Shibayama, Tokyo (JP); Shinya Imano, Tokyo (JP); and Shigenobu Eguchi, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Appl. No. 17/263,739
Filed by Mitsubishi Heavy Industries, Ltd., Tokyo (JP)
PCT Filed Feb. 8, 2019, PCT No. PCT/JP2019/004616
§ 371(c)(1), (2) Date Jan. 27, 2021,
PCT Pub. No. WO2020/161884, PCT Pub. Date Aug. 13, 2020.
Prior Publication US 2021/0178478 A1, Jun. 17, 2021
Int. Cl. B22F 9/08 (2006.01)
CPC B22F 9/082 (2013.01) [B22F 2009/088 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A metal powder manufacturing device comprising:
an atomization tank;
a crucible in which a melting metal is stored;
a molten metal nozzle that allows the melting metal stored in the crucible to flow downward into the atomization tank; and
a fluid spraying nozzle including a plurality of spraying holes that spray a fluid to an atomization tank-side end part of the molten metal nozzle to pulverize the melting metal flowing downward from the molten metal nozzle, wherein
the molten metal nozzle includes a molten metal nozzle body, and an orifice part having an inside diameter equal to or smaller than an inside diameter of the molten metal nozzle body,
a material of the orifice part is harder than a material of the molten metal nozzle body, and
an atomization tank-side end part of the orifice part, in an axial direction, is located above an atomization tank-side end part of the molten metal nozzle body, in the axial direction.