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EP0062221B1 - Procédé de fabrication d'une poudre de métal ou d'un alliage métallique - Google Patents

Procédé de fabrication d'une poudre de métal ou d'un alliage métallique Download PDF

Info

Publication number
EP0062221B1
EP0062221B1 EP82102371A EP82102371A EP0062221B1 EP 0062221 B1 EP0062221 B1 EP 0062221B1 EP 82102371 A EP82102371 A EP 82102371A EP 82102371 A EP82102371 A EP 82102371A EP 0062221 B1 EP0062221 B1 EP 0062221B1
Authority
EP
European Patent Office
Prior art keywords
metal
additive
starting material
process according
copper
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
EP82102371A
Other languages
German (de)
English (en)
Other versions
EP0062221A3 (en
EP0062221A2 (fr
Inventor
Wolfgang Glück
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eckart Werk Standard Bronzepulver Werke Carl Eckart GmbH and Co
Original Assignee
Eckart Werk Standard Bronzepulver Werke Carl Eckart GmbH and Co
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 Eckart Werk Standard Bronzepulver Werke Carl Eckart GmbH and Co filed Critical Eckart Werk Standard Bronzepulver Werke Carl Eckart GmbH and Co
Priority to AT82102371T priority Critical patent/ATE21345T1/de
Publication of EP0062221A2 publication Critical patent/EP0062221A2/fr
Publication of EP0062221A3 publication Critical patent/EP0062221A3/de
Application granted granted Critical
Publication of EP0062221B1 publication Critical patent/EP0062221B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling

Definitions

  • the invention relates to a method for producing flaky, ductile powder from a metallic material.
  • Flake-shaped metal or metal alloy powders are widely used in coating materials because of their pronounced metallic luster, e.g. in body paints.
  • a certain ductility of the starting material for its deformability is important for the formation of the leaflets. The development was and is therefore aimed at improving the deformability of the starting material.
  • the ductile properties of the starting material for metal powder production make it more difficult to comminute the starting material, which is generally in the form of semolina.
  • the starting material is an additive composed of metal, a metal alloy, a semimetal or a metal or metal which is immiscible with this Semi-metal compound is alloyed, this additive being present in the solid state of the material - even at the temperatures occurring during the comminution - as a separate intermediate phase at the interfaces of the crystallites, and then this material is mechanically comminuted and deformed into the leaflets.
  • Such incorporation of the additive into the metal or alloy structure at the crystallite boundaries likewise creates predetermined breaking points at which the coarse semolina grains break particularly easily during the size reduction process. The high ductility desired for the deformability of the fragments into the leaflets is maintained.
  • the additive contained in the grains of the starting material essentially only as an intermediate substance, that is to say as a separate (intermediate) phase and should not be incorporated in the crystallites or their lattice
  • the person skilled in the art will understand that in individual cases, i.e. for a certain starting material, the selection of the foreign substance to be determined by means of a few experiments and the upper limit for its proportion in the starting material. If the proportion was above this limit, embrittlement of the powder particles themselves would occur and the deformability of the material would be severely impaired.
  • the storage character of the additive as an intermediate substance must also be maintained at the temperatures (generally 60 to 100 ° C.) which occur in the course of the deformation of the starting material, i.e. no inclusion of the additives in the crystallites of the starting material may take place.
  • the proportion of additives in the starting material is also subject to an upper limit in that the color character of the metal particles is to be retained.
  • the lower limit for the additive content results from the purpose of the invention, namely to improve the crushability of the starting material.
  • additive is also understood to mean a solid mixture of different substances. Metals, metal alloys, semimetals and their compounds can be considered as additives. It is also within the scope of the invention if the additives active according to the invention are formed only during the production of the starting material from its metal or metals and a constituent added to the starting material and, for example, constitute an intermetaltic compound.
  • the procedure to be followed is that the structure described above is formed, that is to say the additive is precipitated as an intermediate substance at the crystallite boundaries.
  • This can be achieved by appropriate management of the cooling process in the atomization of the melt of the starting material containing the additive, taking into account the state diagram applicable to the system in question (starting material / additive), or by subsequent heat treatment (e.g. tempering).
  • Copper semolina produced by atomization was continuously comminuted in a company ball mill. The comminution was then carried out using copper semolina, to which 0.5% Bi had been added in the melt prepared for atomization. The hourly output of the ball mill could be increased by approx. 30% under the same working conditions and the same quality of the discharged material.
  • Aluminum semolina was ground in batches in a ball mill in the presence of white spirit. The crushing was then carried out using aluminum grit, to which 1% cerium had been added in the melt. The output of the ball mill could be increased by approx. 14% with otherwise the same working conditions and the same quality of the discharged material.
  • the drawing illustrates the structure of a (metal) grain which can be obtained by the process according to the invention with the aid of a micrograph traced for the purpose of illustration and a diagram relating to a section (AA) placed through the grain, with which the distribution of the grain into the grain embedded foreign matter (sb) along the cut surface is shown schematically.
  • the peaks of the diagram curve, the places with the strongest concentration of the foreign substance, are located between the individual crystallites, because according to the invention, the foreign substance accumulates at the interfaces of the crystallites when the melt solidifies.

Landscapes

  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Powder Metallurgy (AREA)
  • Chemically Coating (AREA)
  • Forging (AREA)

Claims (8)

1. Procédé de préparation d'une poudre ductile, lamellaire, à base d'un matériau métallique, caractérise en ce qu'à une matière de départ à base d'aluminium, de cuivre ou d'un alliage de cuivre-zinc, on allie un additif qui n'est pas miscible à la matière de départ et qui est à base de métal, d'un alliage métallique, d'un métalloïde ou d'un composé de métal ou métalloïde, cet additif se présentant, à l'état solide du matériau, même aux températures apparaissant lors de la fragmentation, sous la forme d'une phase intermédiaire séparée sur les surfaces de limite des cristallites et en ce qu'ensuite on fragmente ce matériau par voie mécanique et on le déforme en lamelles.
2. Procédé suivant la revendication 1, caractérisé en ce que la fraction de l'additif dans le matériau est de 0,1 à 5 %.
3. Procédé suivant la revendication 1, caractérisé en ce que la fraction de l'additif dans le matériau est de 1 à 2 %.
4. Procédé suivant la revendication 1, pour la préparation de poudre d'aluminium, caractérisé en ce que, comme additif, on allie du cérium ou de l'antimoine.
5. Procédé suivant la revendication 1, pour la préparation de poudre de cuivre, caractérisé en ce que, comme additif, on allie du bismuth.
6. Procédé suivant la revendication 1, pour la préparation de poudre d'alliage de cuivre-zinc, caractérisé en ce que, comme additif, on allie du bismuth, de l'arsenic ou de l'antimoine.
7. Procédé suivant l'une des revendications précédentes, caractérisé en ce que le matériau est fragmenté dans un broyeur à boulets.
8. Procédé suivant l'une des revendications précédentes, caractérisé en ce que le matériau à fragmenter est obtenu par atomisation.
EP82102371A 1981-04-07 1982-03-23 Procédé de fabrication d'une poudre de métal ou d'un alliage métallique Expired EP0062221B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82102371T ATE21345T1 (de) 1981-04-07 1982-03-23 Verfahren zur herstellung eines metall- oder metall-legierungspulvers.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3113886A DE3113886C2 (de) 1981-04-07 1981-04-07 Verfahren zur Herstellung eines Metall- oder Metallegierungspulvers
DE3113886 1981-04-07

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP84110312.0 Division-Into 1984-08-30

Publications (3)

Publication Number Publication Date
EP0062221A2 EP0062221A2 (fr) 1982-10-13
EP0062221A3 EP0062221A3 (en) 1983-03-30
EP0062221B1 true EP0062221B1 (fr) 1986-08-13

Family

ID=6129494

Family Applications (2)

Application Number Title Priority Date Filing Date
EP84110312A Expired EP0152522B1 (fr) 1981-04-07 1982-03-23 Procédé de fabrication d'une poudre de métal ou d'un alliage métallique
EP82102371A Expired EP0062221B1 (fr) 1981-04-07 1982-03-23 Procédé de fabrication d'une poudre de métal ou d'un alliage métallique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP84110312A Expired EP0152522B1 (fr) 1981-04-07 1982-03-23 Procédé de fabrication d'une poudre de métal ou d'un alliage métallique

Country Status (7)

Country Link
US (1) US4404023A (fr)
EP (2) EP0152522B1 (fr)
AT (2) ATE21345T1 (fr)
BR (1) BR8201969A (fr)
DE (1) DE3113886C2 (fr)
ES (1) ES8307147A1 (fr)
MX (1) MX157229A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4891059A (en) * 1988-08-29 1990-01-02 Battelle Development Corporation Phase redistribution processing
US5322666A (en) * 1992-03-24 1994-06-21 Inco Alloys International, Inc. Mechanical alloying method of titanium-base metals by use of a tin process control agent
IL118088A0 (en) * 1995-06-07 1996-08-04 Anzon Inc Colloidal particles of solid flame retardant and smoke suppressant compounds and methods for making them
US5935890A (en) * 1996-08-01 1999-08-10 Glcc Technologies, Inc. Stable dispersions of metal passivation agents and methods for making them
RU2121411C1 (ru) * 1997-12-05 1998-11-10 Акционерное общество открытого типа "Уралэлектромедь" Способ получения тонкодисперсного порошка из электрической меди и установка для его осуществления
AU3208099A (en) * 1998-05-08 1999-11-29 Ronald R Savin Modification of metallic particles
US9321700B2 (en) 2011-08-04 2016-04-26 University Of Utah Research Foundation Production of nanoparticles using homogeneous milling and associated products

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE44242C (de) * H. LEHMANN in Berlin W., Blumshofstr. 5 Verfahren zur Herstellung von Bronzepulvern aus Wismuth-Aluminiumbronze direkt aus dem Metallblock unter Vermeidung der Metallfolienschlägerei
US1790704A (en) * 1931-02-03 Obatobieb
US1632105A (en) * 1925-03-25 1927-06-14 Western Electric Co Magnetic material and method of producing it
DE536824C (de) * 1929-01-31 1931-10-27 Int Standard Electric Corp Verfahren zur Herstellung fein zerteilter, magnetisierbarer Legierungen fuer Massekerne, insbesondere Eisen-Nickel-Kobalt-Legierungen
DE865212C (de) * 1940-04-21 1953-02-02 Deutsche Edelstahlwerke Ag Verfahren zur Herstellung von Legierungspulvern
DE1047967B (de) * 1955-05-14 1958-12-31 Walter Marx & Co K G Verfahren zur Herstellung eines hochdispersen Zinkpigments mit Blattstruktur
US3787200A (en) * 1967-09-05 1974-01-22 Copper Range Co Metal powders for roll compacting
US3765866A (en) * 1968-09-09 1973-10-16 Contemporary Res Inc Production of copper and copper oxide powder for powder metallurgy
BE794142A (fr) * 1972-01-17 1973-07-17 Int Nickel Ltd Alliages pour hautes temperatures
DE2247299C3 (de) * 1972-09-27 1979-03-01 Vereinigte Aluminium-Werke Ag, 5300 Bonn Verfahren zur pulvermetallurgischen Herstellung von Sinterkörpern aus Aluminiumlegierungen
US3832156A (en) * 1972-09-27 1974-08-27 Us Bronze Powders Inc Powdered metal process
DE2946135C2 (de) * 1979-11-15 1982-09-16 Vereinigte Aluminium-Werke Ag, 5300 Bonn Verfahren zur Weiterzerkleinerung von Metallpulver

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DIES, Kupfer und Kupferlegierungen S. 157, 670, 674-79 664, 665 Springer Verlag (1967) *

Also Published As

Publication number Publication date
ES511284A0 (es) 1983-06-16
ATE21345T1 (de) 1986-08-15
EP0062221A3 (en) 1983-03-30
US4404023A (en) 1983-09-13
DE3113886A1 (de) 1982-10-21
EP0152522B1 (fr) 1988-10-19
ATE38002T1 (de) 1988-11-15
MX157229A (es) 1988-11-07
EP0152522A2 (fr) 1985-08-28
DE3113886C2 (de) 1983-01-20
EP0062221A2 (fr) 1982-10-13
BR8201969A (pt) 1983-03-08
EP0152522A3 (en) 1985-10-09
ES8307147A1 (es) 1983-06-16

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