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1. WO2000038865 - METHOD OF MANUFACTURING METAL POWDER

Publication Number WO/2000/038865
Publication Date 06.07.2000
International Application No. PCT/JP1999/003338
International Filing Date 23.06.1999
IPC
B22F 9/08 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
9Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor
02using physical processes
06starting from liquid material
08by casting, e.g. through sieves or in water, by atomising or spraying
CPC
B22F 2009/086
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
9Making metallic powder or suspensions thereof
02using physical processes
06starting from liquid material
08by casting, e.g. through sieves or in water, by atomising or spraying
082atomising using a fluid
086Cooling after atomisation
B22F 2009/088
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
9Making metallic powder or suspensions thereof
02using physical processes
06starting from liquid material
08by casting, e.g. through sieves or in water, by atomising or spraying
082atomising using a fluid
088Fluid nozzles, e.g. angle, distance
B22F 2009/0884
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
9Making metallic powder or suspensions thereof
02using physical processes
06starting from liquid material
08by casting, e.g. through sieves or in water, by atomising or spraying
082atomising using a fluid
0884Spiral fluid
B22F 9/082
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
9Making metallic powder or suspensions thereof
02using physical processes
06starting from liquid material
08by casting, e.g. through sieves or in water, by atomising or spraying
082atomising using a fluid
Applicants
  • FUKUDA METAL FOIL & POWDER CO., LTD. [JP/JP]; 176, Nakanonocho, Matsubaradori-Muromachi Nishiiru Shimogyo-ku Kyoto-shi, Kyoto 600-8435, JP (AT, BE, CH, CN, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, JP, KR, LU, MC, NL, PT, SE)
  • KIKUKAWA, Masato [JP/JP]; JP (UsOnly)
  • MATSUNAGA, Shigemasa [JP/JP]; JP (UsOnly)
  • INABA, Tsuneta [JP/JP]; JP (UsOnly)
  • IWATSU, Osamu [JP/JP]; JP (UsOnly)
  • TAKEDA, Tohru [JP/JP]; JP (UsOnly)
Inventors
  • KIKUKAWA, Masato; JP
  • MATSUNAGA, Shigemasa; JP
  • INABA, Tsuneta; JP
  • IWATSU, Osamu; JP
  • TAKEDA, Tohru; JP
Agents
  • TAKEISHI, Yasuhiko ; 330-1, Maruya-cho, Gokomachidori-Sanjo Agaru, Nakagyo-ku Kyoto-shi, Kyoto 604-8086, JP
Priority Data
PCT/JP98/0586724.12.1998JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD OF MANUFACTURING METAL POWDER
(FR) PROCEDE DE FABRICATION DE POUDRE METALLIQUE
Abstract
(EN)
A method of manufacturing metal powder for manufacturing metal powder by spraying coolant to a downwardly flowing molten metal flow, characterized by that the coolant is discharged toward the molten metal flow passed through an annular part continuously from an annular nozzle having a hole part to allow the molten metal flow to pass so that the coolant surrounds the molten metal flow in a one-sheet hyperboloid shape, and a pressure on the inside or on the lower inside of the constricted part of the hyperboloid of one-sheet is reduced by 50 to 750 mmHg below that on the upper end part inside of the hyperboloid of one-sheet, whereby metal powder, which is fine, pseudo-spherical, and narrower in particle size distribution, can be manufactured efficiently.
(FR)
L'invention concerne un procédé de fabrication de poudre métallique consistant à pulvériser un agent de refroidissement sur un flux de métal en fusion s'écoulant vers le bas. Ledit procédé est caractérisé en ce que l'agent de refroidissement est projeté en continu vers le flux de métal en fusion, lequel traverse une partie annulaire d'une buse en forme d'anneau comportant un orifice permettant le passage du flux de métal fondu, de manière que l'agent de refroidissement entoure le flux de métal en fusion dans une forme d'hyperboloïde à une nappe. La pression à l'intérieur ou au niveau de la partie intérieure inférieure de la zone étranglée de l'hyperboloïde à une nappe est réduite de 50 à 750 mmHg, à une valeur inférieure à la pression au niveau de la partie terminale intérieure supérieure de l'hyperboloïde à une nappe, ce qui permet de fabriquer, de façon efficace, une poudre métallique à la fois fine et pseudosphérique, qui présente, en outre, une distribution étroite de la granulométrie.
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