WO1991016160A1 - Procede de fabrication d'un metal en forme de particules, dispositif pour la mise en oeuvre de ce procede et son application - Google Patents

Procede de fabrication d'un metal en forme de particules, dispositif pour la mise en oeuvre de ce procede et son application Download PDF

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Publication number
WO1991016160A1
WO1991016160A1 PCT/EP1991/000642 EP9100642W WO9116160A1 WO 1991016160 A1 WO1991016160 A1 WO 1991016160A1 EP 9100642 W EP9100642 W EP 9100642W WO 9116160 A1 WO9116160 A1 WO 9116160A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
outlet
crucible
molten metal
drops
Prior art date
Application number
PCT/EP1991/000642
Other languages
German (de)
English (en)
Inventor
Klaus Kadesch
Rolf Ruthardt
Original Assignee
W.C. Heraeus Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by W.C. Heraeus Gmbh filed Critical W.C. Heraeus Gmbh
Publication of WO1991016160A1 publication Critical patent/WO1991016160A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
    • B23K35/0244—Powders, particles or spheres; Preforms made therefrom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/06—Metallic powder characterised by the shape of the particles
    • B22F1/065—Spherical particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0466—Alloys based on noble metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F2009/0804—Dispersion in or on liquid, other than with sieves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/086—Cooling after atomisation
    • B22F2009/0864—Cooling after atomisation by oil, other non-aqueous fluid or fluid-bed cooling

Definitions

  • the invention relates to a method for producing particulate metal, in which molten metal is introduced dropwise from a crucible into a liquid stream in which the molten metal drops are cooled, an arrangement for carrying out the method and its application.
  • the invention has set itself the task of developing a cost-effective method with which it is possible to verfor en metal melt in spherical particles with narrow Teli he ⁇ yrross ⁇ verieilung and diameters of more than 50 um and to provide a simple and space-saving device.
  • this object is achieved in the method specified at the outset in that the liquid flow is directed counter to the direction of drop of the molten metal drops and the distance between the outlet of the molten metal drops from the crucible and a solidification zone in which the molten metal drops solidify at least on their surface is kept small.
  • the liquid is continuously fed in below the solidification zone via a liquid inlet and continuously removed via a liquid outlet above the outlet of the molten metal from the crucible. It is expedient to feed the liquid discharged via the liquid outlet back into the liquid inlet via a cooling unit. In the sense of rapid heat exchange and a slow rate of descent, it is favorable to select a temperature-stable liquid with a high density and / or with a high heat capacity.
  • temperature-stable oils For metals or metal alloys with a melting point below 400 ° C, temperature-stable oils have proven themselves as coolants. To improve the particle size homogeneity, an excess pressure is applied to the molten metal in the crucible.
  • the size of the metal balls which are produced by this process is determined by the opening width of the outlet, the flow rate of the liquid and the overpressure on the metal melt in the crucible. With an opening width of the outlet between 0.03 and 3 mm, a flow speed between 0.5 and 5 cm / min. and an overpressure between 40 mbar and 4 bar, metal balls with a size of 0.05 to 5 mm can be produced.
  • an arrangement has proven itself which is characterized according to the invention in that the distance between the bottom outlet and the solidification zone is kept as small as possible, and that a liquid inlet is arranged below the solidification zone and a liquid outlet is arranged above the bottom outlet.
  • the bottom outlet of the melting crucible is arranged within a container which receives the liquid flow, and that the bottom outlet and the longitudinal axis of the container face each other which are arranged such that the molten metal drops emerging from the bottom outlet solidify before they touch a boundary surface of the container.
  • the opening of the bottom outlet is designed as a capillary.
  • the capillary is expediently inserted interchangeably into the crucible bottom.
  • a lock device is connected to the bottom of the container, which allows continuous operation of the arrangement.
  • the crucible and / or the container for holding the cooling liquid consists of a temperature-resistant glass.
  • a heating device An electrical immersion heater arranged inside the container has proven useful for this.
  • solder balls with a diameter of 0.1 to 1 mm.
  • solder balls can be produced from a gold-tin alloy with a tin content of 20% by weight.
  • the lower part of a crucible 1 dips into a container 3 filled with liquid 4.
  • the bottom outlet of the crucible 1 consists of a capillary 2 with an inside diameter of approx. 300 ⁇ m.
  • the capillary 2 is interchangeably inserted in the bottom of the crucible 1.
  • the container 3 has an inlet 5 for the liquid 4 below and an outlet 6 above the capillary 2.
  • Both the crucible 1 and the container 3 consist of a high-temperature-resistant glass.
  • a lock device 8 is connected to the container 3.
  • the crucible 1, the container 3 and the lock device 8 are arranged vertically.
  • the lower part of the crucible 1 and the capillary 2 are located within the heating zone of an electric immersion heater 7. With the arrangement described, spherical particles are produced as described below:
  • a tin-gold-solder alloy with a tin content of 20% by weight is filled into the crucible 1 with a suitable flux and argon and is heated to a temperature of approximately 340 ° C. by means of the electric immersion heater 7.
  • the liquid 4 serves in the area of the immersion heater 7 as a heat exchanger. Due to the heating of the liquid in the area of the melting gel 1 and the continuous supply of liquid 4 at room temperature via the inlet 5, a temperature gradient forms in the liquid column below the capillary 2, which is caused by additional cooling of the container 3 is supported in the area of the inlet 5. Under the influence of gravity and an additional nitrogen gas pressure of approximately 150 mbar on the melt surface, a fine stream of solder melt 13 leaves capillary 2 and tears into fine drops of metal melt 12.
  • the liquid 4 in the area of the capillary 2 has an approximately same temperature as the solder melt 13, both a "freezing" of the capillary 2 and a solidification of the solder melt 13 in the form of drops is prevented.
  • the surface tension of the molten solder 13 with respect to the liquid 4 provides for the formation of a spherical shape of the molten metal droplets 12.
  • the molten metal droplets 12 solidified into solder balls 10 are collected at the bottom of the vessel 3 and from time to time via the sluice ⁇ sen device 8 discharged into the collecting container 11.
  • the diameter of the solder balls 10 was approximately 201 within 485-515 .mu.m.

Abstract

L'invention concerne un procédé de fabrication d'un métal en forme de particules, selon lequel la masse fondue métallique contenue dans un creuset est introduite goutte à goutte dans un courant liquide dans lequel les gouttes de métal fondu sont refroidies, ainsi qu'un dispositif pour la mise en oeuvre de ce procédé et son application. L'invention a pour but de mettre au point un procédé économique permettant la mise en forme du métal en particules sphériques d'une répartition granulométrique réduite et de diamètre supérieur à 50 νm, et de concevoir, pour la mise en oeuvre de ce procédé, un dispositif simple et peu encombrant. Ce but est atteint grâce au fait que le courant liquide est envoyé à l'encontre de la direction de la chute des gouttes de métal fondu, et que la distance existant entre l'emplacement de la sortie des gouttes de métal fondu du creuset et une zone de solidification, dans laquelle lesdites gouttes se solidifient, au moins à leur surface, est maintenue aussi faible que possible.
PCT/EP1991/000642 1990-04-14 1991-04-04 Procede de fabrication d'un metal en forme de particules, dispositif pour la mise en oeuvre de ce procede et son application WO1991016160A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4012197.6 1990-04-14
DE4012197A DE4012197C2 (de) 1990-04-14 1990-04-14 Verfahren zur Herstellung teilchenförmigen Metalls und Vorrichtung zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
WO1991016160A1 true WO1991016160A1 (fr) 1991-10-31

Family

ID=6404496

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/000642 WO1991016160A1 (fr) 1990-04-14 1991-04-04 Procede de fabrication d'un metal en forme de particules, dispositif pour la mise en oeuvre de ce procede et son application

Country Status (2)

Country Link
DE (1) DE4012197C2 (fr)
WO (1) WO1991016160A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999003625A1 (fr) * 1997-07-15 1999-01-28 Moskovsky Energetichesky Institut (Tekhnichesky Universitet) Procede de production de granules spheriques monodispersees
EP1777032A1 (fr) * 2004-06-28 2007-04-25 Mitsubishi Materials Corporation Poudre d'alliage au-sn pour soudure en pate
CN112584950A (zh) * 2018-07-03 2021-03-30 格勒诺布尔综合理工学院 造粒方法及装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19801832C2 (de) * 1998-01-14 2000-01-20 Juergen Schulze Verfahren und Vorrichtung zur Herstellung von kugelförmigen Teilchen nahezu gleichen Durchmessers
DE10120612A1 (de) * 2001-04-26 2002-11-21 Omg Ag & Co Kg Verfahren und Vorrichtung zur Herstellung von kugelförmigen Metallteilchen
CN106925786B (zh) * 2017-03-29 2019-02-19 西北工业大学 基于均匀金属液滴喷射的多粒径均匀球形粉体批量制备装置与方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1218846A (fr) * 1958-03-14 1960-05-12 Philips Nv Procédé pour couler des sphérules
US3019485A (en) * 1960-01-11 1962-02-06 Accurate Specialties Inc Method of producing metal spheres
US3206799A (en) * 1963-02-27 1965-09-21 Western Electric Co Apparatus for making dope pellets
GB1022995A (en) * 1962-04-04 1966-03-16 Dorothy Drake Improvements in or relating to the manufacture of lead shot
EP0055378A2 (fr) * 1980-12-31 1982-07-07 International Business Machines Corporation Procédé pour le brasage de surfaces contigues d'éléments
JPS61279603A (ja) * 1985-06-04 1986-12-10 Uchihashi Kinzoku Kogyo Kk 低融点合金粒体の製造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2636219A (en) * 1950-08-23 1953-04-28 Westinghouse Electric Corp Method of producing shot
US2738548A (en) * 1952-04-19 1956-03-20 Universal Oil Prod Co Method and apparatus for manufacture of metallic pellets
DE2542870C3 (de) * 1975-09-25 1980-06-04 Wacker-Chemitronic Gesellschaft Fuer Elektronik-Grundstoffe Mbh, 8263 Burghausen Verfahren zur Herstellung von16""11 Antimonkörpern mit weitgehend kugelförmigen Habitus
DE3035845C2 (de) * 1980-09-23 1986-05-22 Gesellschaft zur Förderung der industrieorientierten Forschung an den Schweizerischen Hochschulen und weiteren Institutionen, Bern Verfahren und Vorrichtung zur Herstellung von Mikrokugeln durch interne Gelierung von Mischfeed-Tropfen
US4559187A (en) * 1983-12-14 1985-12-17 Battelle Development Corporation Production of particulate or powdered metals and alloys

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1218846A (fr) * 1958-03-14 1960-05-12 Philips Nv Procédé pour couler des sphérules
US3019485A (en) * 1960-01-11 1962-02-06 Accurate Specialties Inc Method of producing metal spheres
GB1022995A (en) * 1962-04-04 1966-03-16 Dorothy Drake Improvements in or relating to the manufacture of lead shot
US3206799A (en) * 1963-02-27 1965-09-21 Western Electric Co Apparatus for making dope pellets
EP0055378A2 (fr) * 1980-12-31 1982-07-07 International Business Machines Corporation Procédé pour le brasage de surfaces contigues d'éléments
JPS61279603A (ja) * 1985-06-04 1986-12-10 Uchihashi Kinzoku Kogyo Kk 低融点合金粒体の製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 146 (M-587)13. Mai 1987 & JP-A-61 279 603 (UCHIHASHI KINZOKU KOGYO ) 10. Dezember 1986 siehe das ganze Dokument *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999003625A1 (fr) * 1997-07-15 1999-01-28 Moskovsky Energetichesky Institut (Tekhnichesky Universitet) Procede de production de granules spheriques monodispersees
EP1777032A1 (fr) * 2004-06-28 2007-04-25 Mitsubishi Materials Corporation Poudre d'alliage au-sn pour soudure en pate
EP1777032A4 (fr) * 2004-06-28 2009-03-04 Mitsubishi Materials Corp Poudre d'alliage au-sn pour soudure en pate
US7556669B2 (en) 2004-06-28 2009-07-07 Mitsubishi Materials Corporation Au-sn alloy powder for solder paste
CN112584950A (zh) * 2018-07-03 2021-03-30 格勒诺布尔综合理工学院 造粒方法及装置
CN112584950B (zh) * 2018-07-03 2023-10-10 格勒诺布尔综合理工学院 造粒方法及装置

Also Published As

Publication number Publication date
DE4012197A1 (de) 1991-10-17
DE4012197C2 (de) 1994-08-18

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