EP2689873A1 - Procédé de fabrication d'une poudre d'un alliage métallique - Google Patents

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

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Publication number
EP2689873A1
EP2689873A1 EP13170994.1A EP13170994A EP2689873A1 EP 2689873 A1 EP2689873 A1 EP 2689873A1 EP 13170994 A EP13170994 A EP 13170994A EP 2689873 A1 EP2689873 A1 EP 2689873A1
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EP
European Patent Office
Prior art keywords
gas
melt
powder
flow
grains
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
EP13170994.1A
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German (de)
English (en)
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EP2689873B1 (fr
Inventor
Karl Rimmer
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Individual
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Individual
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Priority to SI201331222T priority Critical patent/SI2689873T1/sl
Publication of EP2689873A1 publication Critical patent/EP2689873A1/fr
Application granted granted Critical
Publication of EP2689873B1 publication Critical patent/EP2689873B1/fr
Priority to HRP20181769TT priority patent/HRP20181769T1/hr
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C18/00—Alloys based on zinc
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C18/00—Alloys based on zinc
    • C22C18/04—Alloys based on zinc with aluminium as the next major constituent
    • 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
    • B22F2009/0844—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 in controlled atmosphere
    • 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
    • B22F2009/0888—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 casting construction of the melt process, apparatus, intermediate reservoir, e.g. tundish, devices for temperature control

Definitions

  • the present invention relates to a method for producing a powder of a metal alloy from a first metal and at least one further metal for use as pigments of a corrosion protection primer for metals.
  • a primer also called a primer
  • the color layer is not applied directly to the surface, but it is first the primer applied to the surface and then the ink layer on the primer.
  • the primer can be designed so that it adheres on the one hand on the surface particularly well and on the other hand ensures optimum connection to the color. That the primer acts as a bonding layer or adhesion promoter between the surface and the paint.
  • the primer can also provide protection against corrosion, for example for body panels, household appliances or shipbuilding.
  • a corrosion protection primer which in an organic matrix, such as a paint or an adhesive, alloyed metallic pigments, for example alloyed zinc-magnesium or alloyed zinc-aluminum-magnesium pigments, optionally mixed with zinc pigments contains.
  • alloyed metallic pigments for example alloyed zinc-magnesium or alloyed zinc-aluminum-magnesium pigments, optionally mixed with zinc pigments contains.
  • the object of the present invention is to provide a process for producing such corrosion-protective pigments or a powder for use as pigments of a corrosion-protection primer.
  • the grains of the powder - and thus the pigments - should have the largest possible size distribution.
  • the pigments thus produced should allow improved corrosion resistance and improved weldability.
  • pigments of a corrosion protection primer can be produced particularly efficiently by producing droplets of a molten metal alloy.
  • the droplets are cooled and solidified to form a powder.
  • the grains of the powder can be used as pigments of a corrosion protection primer.
  • a defined size distribution of the droplets or, as a consequence, of the powder grains can be achieved by the generation of droplets.
  • a defined size distribution of the pigments in the anticorrosive primer is ensured, which in turn has a positive effect on the course of a reaction that takes place in corrosive attacks and in which a rearrangement of the pigment metals and, consequently, the formation of a corrosion-protective passive layer on the metal surface to be protected ,
  • the defined size distribution of the droplets can be achieved by gasifying the metal alloy melt using a primary gas and a secondary gas.
  • the metal droplets can be produced particularly simply and efficiently - and thus cost-effectively - by the gasification or atomization being carried out in such a way that the material flow follows the force of gravity, that is to say with a directional component which points vertically from top to bottom.
  • This directional component (perpendicular from top to bottom) of the material flow fails, the more efficient the metal droplet production. Therefore, it is at a preferred Embodiment of the method according to the invention provided that the material flow of gravity follows.
  • a heated (atomizing) crucible or heated tundish is used, at its lower end a nozzle system for atomizing and supply lines for the primary gas and the secondary gas are provided.
  • the nozzle system is preferably also heated. Accordingly, it is provided in a preferred embodiment of the method according to the invention that the melt is introduced immediately before sputtering in a heated tundish or continuously fed via a Vorschmelzleg réellesofen means of a pump and / or gutter system a heated tundish, the tundish at a lower end a nozzle system and supply lines for the primary gas and the secondary gas has.
  • a temperature in a range of 340 ° C to 700 ° C, preferably from 570 ° C to 630 ° C, more preferably of 600 ° C has been found.
  • the temperature of the melt may range from 370 ° C to 670 ° C, preferably from 400 ° C to 640 ° C, more preferably from 430 ° C to 610 ° C, especially from 460 ° C to 580 ° C, especially from 490 ° C to 550 ° C, lie. It is therefore provided in a preferred embodiment of the method according to the invention that the temperature of the melt is 340 ° C to 700 ° C, preferably 600 ° C.
  • both the primary gas and the secondary gas have a temperature in a range of 0 ° C to 450 ° C, preferably from 370 ° C to 430 ° C, more preferably from 400 ° C.
  • both the primary gas and the secondary gas may have a temperature in a range from 30 ° C to 420 ° C, preferably from 60 ° C to 390 ° C, preferably from 90 ° C to 360 ° C, more preferably from 120 ° C to 330 ° C, in particular from 150 ° C to 300 ° C, especially from 180 ° C to 270 ° C, exhibit.
  • the heating of the primary gas and the secondary gases can be effected by the supply of gases to the heated tundish or to its nozzle system, i. by thermal contact with the heated tundish or its nozzle system.
  • both the primary gas and the secondary gas are preheated to 0 ° C to 450 ° C, preferably 400 ° C.
  • the primary gas may have a high (first) gas flow as a guide gas
  • the secondary gas may be intended for the actual sputtering process and a have lower (second) gas flow compared to the primary gas. Accordingly, it is provided in a preferred embodiment of the method according to the invention that the second gas flow is less than the first gas flow.
  • the first gas flow in a range of 300 kg / h to 900 kg / h, preferably from 650 kg / h to 750 kg / h, more preferably at 700 kg / h and the second gas flow in one Range from 50 kg / h to 150 kg / h, preferably from 70 kg / h to 120 kg / h, more preferably at 90 kg / h.
  • the first gas flow may range from 330 kg / h to 870 kg / h, preferably from 360 kg / h to 840 kg / h, preferably from 390 kg / h to 810 kg / h, more preferably from 420 kg / h to 780 kg / h, in particular from 450 kg / h to 750 kg / h, especially from 480 kg / h to 720 kg / h.
  • the second gas flow may range from 80 kg / h to 120 kg / h, preferably from 90 kg / h to 110 kg / h.
  • the first gas flow is 300 kg / h to 900 kg / h, preferably 700 kg / h and the second gas flow 50 kg / h to 150 kg / h, preferably 90 kg / h H.
  • a defined size distribution of the pigments in the anticorrosive primer is crucial for an optimal sequence of the protective reaction taking place during corrosive attacks.
  • a further process step for subdividing the powder grains into coarse material and fine material is provided.
  • the coarse material is then recycled by re-feeding it to the melt.
  • powder grains of the coarse material have a diameter of at least 100 .mu.m, preferably of at least 1000 .mu.m.
  • a classifying device preferably a screening machine, particularly preferably an ultrasonic screening machine, is used.
  • the powder is separated by means of a classifier, preferably by means of an ultrasonic sieve in coarse and fine material to remove coarse material with a grain diameter of at least 1000 microns, the coarse again Melt is supplied.
  • a (further) subdivision of the powder into fine material and coarse material can take place by means of a cyclone, the fine material having a particle diameter of less than 1000 ⁇ m, preferably less than 100 ⁇ m. Therefore, it is provided in a preferred embodiment of the method according to the invention that the powder is separated by means of a cyclone in fines and coarse material, wherein all grains of the fines have a diameter of less than 1000 microns.
  • the powder grains may have different shapes.
  • the powder grains may also be needle-shaped, ie have an elongated shape along an axis.
  • a non-uniform shape is possible, i.
  • the powder grains can also be spotty.
  • the dominant shape can be adjusted by choosing the process parameters, such as the gas flows. Accordingly, it is provided in a preferred embodiment of the method according to the invention, that the shape of the powder grains is mostly spherical, needle-shaped or spratzig.
  • the term "grain diameter” or “diameter” refers to the diameter of an imaginary sphere enclosing each powder grain. That the "diameter” in such a case denotes the largest extent of a grain in one direction.
  • the choice of alloy composition is decisive for the corrosion protection effect.
  • the best results are achieved with a Zn-Mg, Zn-Al or Zn-Mg-Al alloy. Accordingly, in a preferred embodiment of the method according to the invention, it is provided that the first metal is Zn and the at least one further metal is Mg and / or Al.
  • the composition ideally moves in the range from 50% by weight to 99.9% by weight, preferably from 97% by weight to 98% by weight, preferably from 60% by weight to 89.9% by weight. -%, more preferably from 70 wt .-% to 79.9 wt .-% Zn content and from 0.1 wt .-% to 50 wt .-%, preferably 1.9 wt .-% to 2.2 Wt .-%, preferably from 10.1 wt .-% to 40 wt .-%, more preferably from 20.1 wt .-% to 30 wt .-% Mg content and / or Al content.
  • the alloy may have unavoidable impurities with other metals, especially Fe and / or Pb and / or Cd.
  • traces of Al may also occur as an impurity.
  • Total impurities account for less than 1% by weight, preferably less than 0.1% by weight, more preferably less than 0.05% by weight. Accordingly, it is provided in a preferred embodiment of the method according to the invention that the melt has a Zn content of 50 wt .-% to 99.9 wt .-% and an Mg content of 0.1 wt .-% to 50 wt. -% and / or an Al content of 0.1 wt.% To 50 wt .-% and optionally unavoidable impurities, in particular Fe and / or Pb and / or Cd.
  • Fig. 1 shown overall flow diagram of a method according to the invention is initially in a Melting furnace 17 Zn 18 melted and then alloyed Mg 19a and / or Al 19b as at least one other metal in a melt 20.
  • the product purity of the Zn 18 used is typically at least 99.995% by weight, and those of the Mg 19a or Al 19b used are typically at least 99.8% by weight.
  • the melt 20 which typically has a temperature in a range of 340 ° C to 700 ° C, typically a temperature of 600 ° C, is fed by means of a pump (not shown) to a preheated atomizer 2 via a stopper rod (not shown) is sealed at its bottom side 22 for the melt. Only when the melt 20 in the preheated Tundish 2 has reached a certain liquid level, for example 30 cm, the stopper rod is pulled out.
  • the melt 20 emerging from the tundish 2 by gravity will now become metal droplets (not shown), i. Droplets of the melt 20, atomized or atomized.
  • the atomization also has a directional proportion, which points in accordance with gravity from top to bottom, which causes a particularly efficient production of the metal droplets.
  • primary gas 6 is supplied by means of a feed line 4 and preheated secondary gas 7 by means of a supply line 5 to the nozzle system 3.
  • the primary gas 6 or the secondary gas 7 is heated to a temperature in a range of 0 ° C to 450 ° C, typically to a temperature of 400 ° C, wherein the temperatures of the primary gas 6 and the secondary gas 7 may differ from each other.
  • the main difference between the primary gas 6 and the secondary gas 7 is in different gas flows.
  • One first gas flow of the primary gas 6 is 300 kg / h to 900 kg / h, preferably 700 kg / h;
  • a second gas flow of the secondary gas 7 is 50 kg / h to 150 kg / h, preferably 90 kg / h.
  • inert gases preferably N 2 and / or Ar and / or He, are used for both the primary gas 6 and the secondary gas 7.
  • the metal droplets of the melt 20 solidify to form grains of a metal alloy powder 21.
  • a flow of material 1 that occurs during sputtering and solidification and has a directional perpendicularity from top to bottom, i. Following gravity is, by a cooled spray tower 8.
  • the solidified powder 21 exits.
  • the powder 21 is first divided by means of a cyclone 11 into fine material and coarse material, wherein the coarse material has a grain diameter of at least 1000 microns.
  • the coarse material is discharged via a material discharge 12 of the cyclone 11 and fed back to the melt 20 (not shown).
  • the fine material is finally fed to a filter system 13, from which the primary gas 6 and secondary gas 7 used in the atomization can escape via a gas outlet 14.
  • a Filterstaubaustrag 15 of the filter unit 13 the powder 21 is discharged with a well-defined or narrow size distribution of the powder grains as a finished product.
  • Fig. 2 shows the result of a grain size measurement of a powder 21 of a Zn-Mg alloy.
  • the grain diameter D is plotted on a logarithmic scale in microns, on the right y-axis the absolute frequency q3 of the grains detected in a diameter interval or a diameter class in arbitrary units, with which the histogram shown results. It covers in Fig. 2 the x-axis ranges from 0.04 ⁇ m to 500 ⁇ m, divided into 100 classes.
  • a curve for the cumulative frequency Q3 in% is drawn as a solid line, with the values for the cumulative frequency in% on the left y axis.
  • a diameter of less than or equal to 5.54 ⁇ m is reported for 10% of all detected grains.
  • the diameter of 50% of all grains is less than or equal to 10.43 ⁇ m; the diameter of 90% of all grains is less than or equal to 15.74 microns.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
EP13170994.1A 2012-07-25 2013-06-07 Procédé de fabrication d'une poudre d'un alliage métallique Active EP2689873B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI201331222T SI2689873T1 (sl) 2012-07-25 2013-06-07 Postopek za izdelavo praška kovinske zlitine
HRP20181769TT HRP20181769T1 (hr) 2012-07-25 2018-10-25 Postupak za proizvodnju praha od metalne legure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATGM304/2012U AT13319U1 (de) 2012-07-25 2012-07-25 Verfahren zur Herstellung eines Pulvers einer Metalllegierung

Publications (2)

Publication Number Publication Date
EP2689873A1 true EP2689873A1 (fr) 2014-01-29
EP2689873B1 EP2689873B1 (fr) 2018-08-08

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Application Number Title Priority Date Filing Date
EP13170994.1A Active EP2689873B1 (fr) 2012-07-25 2013-06-07 Procédé de fabrication d'une poudre d'un alliage métallique

Country Status (8)

Country Link
EP (1) EP2689873B1 (fr)
AT (1) AT13319U1 (fr)
DK (1) DK2689873T3 (fr)
ES (1) ES2693553T3 (fr)
HR (1) HRP20181769T1 (fr)
LT (1) LT2689873T (fr)
SI (1) SI2689873T1 (fr)
TR (1) TR201815838T4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109530709A (zh) * 2018-12-06 2019-03-29 江苏申隆锌业有限公司 一种锌粉的制备方法
EP3725439A2 (fr) 2019-04-15 2020-10-21 Karl Rimmer Fabrication d'une poudre métallique d'un alliage d'aluminium destinée à l'utilisation en tant que matière dans la fabrication additive
CN113600820A (zh) * 2021-08-04 2021-11-05 宁波双鹿新能源科技有限公司 一种雾化制备锌材料生产系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10280012A (ja) * 1997-04-07 1998-10-20 Nippon Steel Corp 塗料顔料用金属粉末およびその製造方法
US20040045404A1 (en) * 2002-09-11 2004-03-11 Akira Oyama Process for producing zinc or zinc alloy powder for battery
EP2016138B1 (fr) 2007-05-08 2010-07-14 Voestalpine Stahl GmbH Système de protection contre la corrosion pour métaux et pigment associé
CN102011028A (zh) * 2010-11-04 2011-04-13 宁波双鹿能源科技有限公司 用作电极的锌粉及其制备方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE759740A (fr) * 1969-12-03 1971-05-17 Stora Kopparbergs Bergslags Ab Procede et dispositif de fabrication de poudre par atomisation d'une matiere en fusion
US4272463A (en) * 1974-12-18 1981-06-09 The International Nickel Co., Inc. Process for producing metal powder
SE461848B (sv) * 1987-12-09 1990-04-02 Hg Tech Ab Foerfarande foer atomisering av vaetskor och anordning foer genomfoerande av foerfarandet
US4999051A (en) * 1989-09-27 1991-03-12 Crucible Materials Corporation System and method for atomizing a titanium-based material
EP1356882A1 (fr) * 2002-04-04 2003-10-29 Capital Technology GmbH Appareil pour la production d'une poudre metallique
US7744808B2 (en) * 2007-12-10 2010-06-29 Ajax Tocco Magnethermic Corporation System and method for producing shot from molten material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10280012A (ja) * 1997-04-07 1998-10-20 Nippon Steel Corp 塗料顔料用金属粉末およびその製造方法
US20040045404A1 (en) * 2002-09-11 2004-03-11 Akira Oyama Process for producing zinc or zinc alloy powder for battery
EP2016138B1 (fr) 2007-05-08 2010-07-14 Voestalpine Stahl GmbH Système de protection contre la corrosion pour métaux et pigment associé
CN102011028A (zh) * 2010-11-04 2011-04-13 宁波双鹿能源科技有限公司 用作电极的锌粉及其制备方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109530709A (zh) * 2018-12-06 2019-03-29 江苏申隆锌业有限公司 一种锌粉的制备方法
EP3725439A2 (fr) 2019-04-15 2020-10-21 Karl Rimmer Fabrication d'une poudre métallique d'un alliage d'aluminium destinée à l'utilisation en tant que matière dans la fabrication additive
EP3725439A3 (fr) * 2019-04-15 2020-10-28 Karl Rimmer Fabrication d'une poudre métallique d'un alliage d'aluminium destinée à l'utilisation en tant que matière dans la fabrication additive
CN113600820A (zh) * 2021-08-04 2021-11-05 宁波双鹿新能源科技有限公司 一种雾化制备锌材料生产系统

Also Published As

Publication number Publication date
HRP20181769T1 (hr) 2018-12-28
ES2693553T3 (es) 2018-12-12
DK2689873T3 (en) 2018-11-26
LT2689873T (lt) 2018-11-26
EP2689873B1 (fr) 2018-08-08
SI2689873T1 (sl) 2018-11-30
AT13319U1 (de) 2013-10-15
TR201815838T4 (tr) 2018-11-21

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