METAL POWDER PRODUCTION METHOD AND METAL POWDER PRODUCTION DEVICE

• US 20140202286A1
• Filed: 05/18/2012
• Published: 07/24/2014
• Est. Priority Date: 05/18/2011
• Status: Abandoned Application

• Current Assignee: Hard Industry Yugen Kaisha, Tohoku Techno Arch Co., Ltd.
• Original Assignee: Hard Industry Yugen Kaisha, Tohoku Techno Arch Co., Ltd.
• Inventors: Yokoyama, Yoshihiko, Yamagata, Takuichi, Yamagata, Torao
• Application Number:
  US14/118,446
• Publication Number:
  US 20140202286A1
• Time in Patent Office: Days
• US Class Current: 75/331
• CPC Class Codes: B22F 1/052 characterised by a mixture of particles of different sizes or by the particle size distribution
• CPC Class Codes: B22F 1/065 Spherical particles
• CPC Class Codes: B22F 1/08 Metallic powder characterised by particles having an amorphous microstructure
• CPC Class Codes: B22F 2009/0848 Melting process before atomisation
• CPC Class Codes: B22F 2009/088 Fluid nozzles, e.g. angle, distance
• CPC Class Codes: B22F 2009/0888 casting construction of the melt process, apparatus, intermediate reservoir, e.g. tundish, devices for temperature control
• CPC Class Codes: B22F 2202/00 Treatment under specific physical conditions
• CPC Class Codes: B22F 9/02 using physical processes
• CPC Class Codes: B22F 9/04 starting from solid material, e.g. by crushing, grinding or milling C22C1/1084 takes precedence; crushing, grinding or milling, in general, see the relevant subclasses, e.g. B02C
• CPC Class Codes: B22F 9/08 by casting, e.g. through sieves or in water, by atomising or spraying using electric discharge B22F9/14
• CPC Class Codes: C22C 33/02 by powder metallurgy working metallic powder B22F

Abstract

A metal powder production method and a metal powder production device capable of reducing the size of the device, reducing costs, and obtaining spherical metal powder are provided. Supply means supplies a downward flow of molten metal, and a plurality of jet burners emit flame jets to the downward flow of the molten metal supplied from the supply means. Each of the jet burners is provided to emit the flame jet from the same angle and from each of positions rotationally symmetrical with each other with respect to the downward flow of the molten metal.

Claims

1. A metal powder production method for obtaining metal powder by using a principle of an atomization method, the metal powder production method comprising the steps of:

providing a circular jet orifice for emitting a flame jet;

arranging molten metal or a metal wire on an inner side of the flame jet emitted from the jet orifice; and

emitting the flame jet to the molten metal or the metal wire so as to obtain the metal powder.

2. The metal powder production method according to claim 1,

wherein the flame jet is emitted from a periphery of the molten metal or the metal wire so that the flame jet collides against the molten metal or the metal wire with an almost equal jet pressure and without leaving any space along an outer periphery of the molten metal or the metal wire.

11. The metal powder production method according to claim 1,

wherein the jet orifice comprises a Laval nozzle type.

13. The metal powder production method according to claim 2,

wherein the jet orifice comprises a Laval nozzle type.

3-4. -4. (canceled)

5. A metal powder production device for obtaining metal powder by using a principle of an atomization method, the metal powder production device comprising:

supply means for supplying molten metal or a metal wire; and

a jet burner for emitting a flame jet to the molten metal or the metal wire supplied from the supply means,

wherein the jet burner comprises a circular jet orifice for emitting the flame jet, and the molten metal or the metal wire is arranged on an inner side of the flame jet emitted from the jet orifice.

6. The metal powder production device according to claim 5,

wherein the jet burner emits the flame jet from a periphery of the molten metal or the metal wire so that the flame jet collides against the molten metal or the metal wire with an almost equal jet pressure and without leaving any space along an outer periphery of the molten metal or the metal wire.

12. The metal powder production device according to claim 5,

wherein the jet orifice comprises a Laval nozzle type.

14. The metal powder production device according to claim 6,

wherein the jet orifice comprises a Laval nozzle type.

7-10. -10. (canceled)