EP0152522A2 - 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

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Publication number
EP0152522A2
EP0152522A2 EP84110312A EP84110312A EP0152522A2 EP 0152522 A2 EP0152522 A2 EP 0152522A2 EP 84110312 A EP84110312 A EP 84110312A EP 84110312 A EP84110312 A EP 84110312A EP 0152522 A2 EP0152522 A2 EP 0152522A2
Authority
EP
European Patent Office
Prior art keywords
starting material
metal
foreign substance
powder
producing
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.)
Granted
Application number
EP84110312A
Other languages
German (de)
English (en)
Other versions
EP0152522A3 (en
EP0152522B1 (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 AT84110312T priority Critical patent/ATE38002T1/de
Publication of EP0152522A2 publication Critical patent/EP0152522A2/fr
Publication of EP0152522A3 publication Critical patent/EP0152522A3/de
Application granted granted Critical
Publication of EP0152522B1 publication Critical patent/EP0152522B1/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 a metal or metal alloy powder with flake-shaped powder particles by mechanical comminution of a ductile starting material, the deformation into the leaflets taking place simultaneously with the comminution or in a separate mechanical operation.
  • Platelet-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 the comminution of the starting material, which is generally present as semolina, difficult. It has been observed, however, that lead content in the metal grit makes the starting material harder and therefore easier to shred. However, this has the disadvantageous consequence that the deformability of the powder particles is severely impaired and the formation of leaflets is only possible to a very limited extent. For this reason, the difficulties in shredding the ductile starting material and thus the use of a cost-increasing outlay for the shredding process have been accepted in favor of easier deformability. A solution to the problem of improving the crushability of the starting material while at the same time maintaining its ductility by means of suitable additives to the starting material was not considered possible.
  • the starting material used according to the invention and already containing the FremEtoff was subjected to atomization after melting, the starting material has a comparatively very fine-grained crystallite structure with a correspondingly large crystallite surface.
  • the resulting large grain interface area allows a larger proportion of foreign matter to be introduced into the starting material only at the interfaces of the crystallites (up to approx. 5%) than in the case of a coarser crystallite structure in which higher foreign matter proportions can lead to solid solution solidification, which do not only a reduction of M akrozähmaschine has the result which would be advantageous in itself for the Verkleinerhus of the starting material, but also brings a reduction in the significant for the deformability of the starting material micro toughness with it.
  • the foreign substance in the grains of the starting material contains 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 is familiar with that in individual cases, ie 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, the powder particles themselves would become brittle occur and the deformability of the material are greatly impaired.
  • foreign substance also means a mixture of different substances the.
  • Metals, metal alloys, semimetals and their compounds can be considered as foreign substances. It is also within the scope of the invention if the foreign substances effective according to the invention are formed from the metal or metals and an additive only when the starting material is produced and, for example, constitute an intermetallic compound.
  • bismuth and antimony have proven to be suitable foreign substances for the purposes of the invention. Their proportions are generally between 0.1 and 5%, preferably between 1 and 2%.
  • the procedure to be followed is that the structure described above is formed, that is to say the foreign substance 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 foreign substance, taking into account the state diagram applicable to the system in question (starting material / foreign substance) 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.
  • the drawing illustrates the structure of a (metal) grain which can be obtained by the process according to the invention using a micrograph traced for the sake of clarity and a diagram relating to a section (AA) placed through the grain, with which the distribution of the foreign substance (sb) embedded in the grain 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)
EP84110312A 1981-04-07 1982-03-23 Procédé de fabrication d'une poudre de métal ou d'un alliage métallique Expired EP0152522B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84110312T ATE38002T1 (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
DE3113886 1981-04-07
DE3113886A DE3113886C2 (de) 1981-04-07 1981-04-07 Verfahren zur Herstellung eines Metall- oder Metallegierungspulvers

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP82102371.0 Division 1982-03-23

Publications (3)

Publication Number Publication Date
EP0152522A2 true EP0152522A2 (fr) 1985-08-28
EP0152522A3 EP0152522A3 (en) 1985-10-09
EP0152522B1 EP0152522B1 (fr) 1988-10-19

Family

ID=6129494

Family Applications (2)

Application Number Title Priority Date Filing Date
EP82102371A Expired EP0062221B1 (fr) 1981-04-07 1982-03-23 Procédé de fabrication d'une poudre de métal ou d'un alliage métallique
EP84110312A Expired EP0152522B1 (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
EP82102371A Expired EP0062221B1 (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) EP0062221B1 (fr)
AT (2) ATE38002T1 (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
WO1999058274A1 (fr) * 1998-05-08 1999-11-18 Savin Roland R Modification de particules metalliques
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
US1790704A (en) * 1931-02-03 Obatobieb
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
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
US3832156A (en) * 1972-09-27 1974-08-27 Us Bronze Powders Inc Powdered metal process
DE2247299C3 (de) * 1972-09-27 1979-03-01 Vereinigte Aluminium-Werke Ag, 5300 Bonn Verfahren zur pulvermetallurgischen Herstellung von Sinterkörpern aus Aluminiumlegierungen
DE2946135C2 (de) * 1979-11-15 1982-09-16 Vereinigte Aluminium-Werke Ag, 5300 Bonn Verfahren zur Weiterzerkleinerung von Metallpulver

Also Published As

Publication number Publication date
MX157229A (es) 1988-11-07
EP0062221B1 (fr) 1986-08-13
US4404023A (en) 1983-09-13
EP0152522A3 (en) 1985-10-09
DE3113886A1 (de) 1982-10-21
ES511284A0 (es) 1983-06-16
EP0152522B1 (fr) 1988-10-19
EP0062221A2 (fr) 1982-10-13
EP0062221A3 (en) 1983-03-30
ATE21345T1 (de) 1986-08-15
ATE38002T1 (de) 1988-11-15
DE3113886C2 (de) 1983-01-20
ES8307147A1 (es) 1983-06-16
BR8201969A (pt) 1983-03-08

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