EP1008407A2 - Procédé et installation de préparation de poudre métallique dans un conteneur par pulvérisation de métal fondu - Google Patents

Procédé et installation de préparation de poudre métallique dans un conteneur par pulvérisation de métal fondu Download PDF

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Publication number
EP1008407A2
EP1008407A2 EP99890354A EP99890354A EP1008407A2 EP 1008407 A2 EP1008407 A2 EP 1008407A2 EP 99890354 A EP99890354 A EP 99890354A EP 99890354 A EP99890354 A EP 99890354A EP 1008407 A2 EP1008407 A2 EP 1008407A2
Authority
EP
European Patent Office
Prior art keywords
powder
metal powder
separator
gas
metal
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
EP99890354A
Other languages
German (de)
English (en)
Other versions
EP1008407A3 (fr
EP1008407B1 (fr
Inventor
Claes Tornberg
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.)
Voestalpine Boehler Edelstahl GmbH
Original Assignee
Boehler Edelstahl GmbH and Co KG
Boehler Edelstahl 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 Boehler Edelstahl GmbH and Co KG, Boehler Edelstahl GmbH filed Critical Boehler Edelstahl GmbH and Co KG
Publication of EP1008407A2 publication Critical patent/EP1008407A2/fr
Publication of EP1008407A3 publication Critical patent/EP1008407A3/fr
Application granted granted Critical
Publication of EP1008407B1 publication Critical patent/EP1008407B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22F9/06—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
    • 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
    • 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
    • B22F2009/0896—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 particle transport, separation: process and apparatus

Definitions

  • the invention relates to a device and to a method for Creation of primary material for powder metallurgy parts.
  • the invention relates to a device for the production of Metal powder from melts with at least one metallurgical vessel for Treat and / or to provide the liquid metal, one Atomization chamber with a nozzle part for atomizing the liquid metal, a separator for classifying the metal powder formed, one Encapsulation system for inserting and closing the same in a container as well as conveying and connecting means for powder transport in the facility and Lines with regulators and connections and the like for providing Atomizing media.
  • the invention further comprises a method for producing metal powder from Melting, in which liquid metal from a metallurgical vessel into a Atomization chamber introduced, in this by means of a gaseous medium atomized solidified and a metal powder formed in this way classified and in Capsules are filled, after which they are sealed and further processed be fed.
  • Own workpieces and parts manufactured using powder metallurgy consistently fine-grained isotropic structure and thus advantageously the same Material properties regardless of the direction of use.
  • the cheap Structural and in particular mechanical properties are compared with conventional goods, also essential for high-alloy PM materials improved because they have no coarse primary excretions, even if the respective content of the elements causing these excretions is high.
  • a powder metallurgical production of workpieces is essentially carried out such that a molten metal in a thin stream into a cavity, a So-called atomization chamber, introduced and the melt jet by means a gas flow which exhibits or causes a high kinetic energy from nozzles, into small droplets.
  • the droplets freeze when further wandering through the chamber in an extremely short time and are considered Powder grains collected. This is followed by further cooling and optionally classifying the metal powder, which is ultimately in a Metal capsule is enclosed, whereupon the capsules are pressed subjected to high temperature.
  • This hot pressing can be done by forging or rolling the capsules brought to the deformation temperature or by hot isostatic pressing (HiP-en) of the same are carried out, with a Sintering together of the powder grains and a disappearance of the cavities done between these and a completely dense workpiece with extreme fine-grained, homogeneous structure on all sides.
  • HiP-en hot isostatic pressing
  • a device for metal powder production can be one, essentially vertical or have an essentially horizontal atomization chamber, depending on the which type of atomization or direction is intended for the molten metal.
  • a melt into powder can in the facility Remains of the same type remain, which are applied with the subsequent batch and with these are processed further.
  • This residual mixing is optional tolerable if subsequent melts or melts of the same Steel brand within the prescribed narrow range of chemical Composition for processing. Otherwise, however, is one elaborate and time-consuming cleaning of the atomizing device required undloder it must be the lead or the first partial powder eliminated and allocated to the waste.
  • the size is of the droplets formed with unchanged gas exposure from the Temperature of the melt and in particular the speed or ferrostatic pressure with which this is fed into the chamber. So are the temperature of the bath and / or the metal bath height in the metallurgical vessel not largely constant over the spraying time held, depending on the dependency different powder grain classes formed and can subsequently be layered in the capsule, whereby inhomogeneities with higher at least in its longitudinal direction Residual cavities arise.
  • the invention is based on the object To create facility for the production of metal powder from melts, which preferred solidification criteria of the metal droplets favored a special one Spraying chamber has an advantageous simple powder application in the Equipment used, the densest possible powder grain packs for filling Provides capsules and low overall height of the facility as well as high Has economic efficiency in the creation of facilities.
  • the task at a facility of the type mentioned is solved according to the invention in that the atomization chamber, which entry side communicates with the metallurgical vessel and in its longitudinal extent is inclined at an angle downwards, with a discharge side Bypass part interacts, on which part in continuation of the funding route for the powder, an upward pipe connects and this riser in a disintegrator upstream of the separator opens, the one with the Disintegrator connected to a separator connected to a deflector has a collecting container, which even with the interposition of a Shut-off device in connection with an encapsulation system or powder capsule is feasible.
  • the disintegrator positioned in a high position after the riser pipe has the Advantage that the powder easily uses a separator when gravity is used can be supplied, after which the selected ones subsequently Powder fractions can be introduced into a collection container.
  • the collection container has a shut-off device on the discharge side, so that, if appropriate large quantities of powder according to requirements in a variety of small Capsules can be filled.
  • the parts atomization chamber, riser, disintegrator, separator and Collecting container at least one briefly detachable and attachable Have cleaning closure means or a similar cleaning opening and that the bypass part is removable.
  • the bypass part andlor the riser pipe at least one feed for the upward in the pipe Directed effective pumping gas (s) are particularly favorable tunable Flow conditions and thus an advantageous powder delivery in the The facility can be reached and the respective can be particularly effective Internal pressure ratios can be set up.
  • the powder which is often used during the manufacturing process Depending on the batch, different grain sizes accumulate over time an insertion into a capsule are treated further if the Collecting container bottom at least one connection for the supply of gas Has homogenization of the powder fraction.
  • the capacity of the collection container corresponds to the amount of powder that is made up a batch of liquid metal can be created in the distributor.
  • a pressure is adjustable, which around is more than 0.1 bar above the ambient pressure.
  • the melt can be supplied with thermal energy in the distributor and / or this is movable by magnetic means.
  • the further aim of the invention is thereby in a generic method achieved that formed in the sloping downward atomization chamber Metal powder brought together in the lower or discharge area of the same, inserted in a downstream bypass section, by means of introduced Conveyed gas conveyed upwards in a pipe guide, into a disintegrator, in particular in a cyclone separator, introduced, disintegrated and subsequently is classified, then the desired fractions of the powder in a container collected, through which gas flows from below and mixed in such a way what after collecting a desired homogenized amount of powder Introducing the metal powder into a capsule and sealing the same respectively.
  • the advantages of the method according to the invention are in particular that when the liquid metal stream is atomized in the inclined Atomization chamber the trajectory of the droplets is enlarged and by that The atomization medium solidifies and effectively cools at an early stage the powder grains are effected.
  • the powder is transported with comparatively low gas throughput through the chamber, so that collection and introducing the grains into the bypass section under favorable conditions given is. From the bypass part, the powder is conveyed by conveying gas, which is a exerts further cooling effect, promoted upwards and subsequently disintegrates, classified and placed in the collection container, what plant and procedurally by a low heat load and by the Gravity effect can be advantageously carried out.
  • conveying gas which is a exerts further cooling effect, promoted upwards and subsequently disintegrates, classified and placed in the collection container, what plant and procedurally by a low heat load and by the Gravity effect can be advantageously carried out.
  • flow through increases in quality for use in capsules of the powder in the container with gas from below, because it is not just one homogeneous
  • Oxidation of the powder grain surfaces and an internal inert gas load during Hot compacting to non-porous workpieces can be prevented if the Production of the metal powder and its encapsulation while avoiding air access or with an overpressure of inert gas in the system.
  • each in one the first process step atomizes a batch or melt into metal powder and after preparation, this is introduced into and into at least one capsule is included, whereupon a disclosure in a subsequent step of the method the cleaning closures arranged in the individual parts of the device carried out and the equipment parts are cleaned of powder residues, after which the cleaning openings are sealed and a provision of the Setup for spraying another batch.
  • a molten metal is in one Metallurgical vessel 2 provided and by means of a nozzle in the form of a thin Metal stream introduced into a atomization chamber 3.
  • the metal stream 3 will by means of a gas nozzle part 12 in the upper region of the atomization chamber 3 escaping gas stream atomized with high kinetic energy while doing so Powder grains formed are introduced into a bypass part 4.
  • a Conveying gas supply line 13 from the compressed gas line system 10 takes place upwards directional conveyance of the powder in a riser 5, which by means of a Feed pipe 51 is connected to a disintegrator 6.
  • the atomizing and conveying gas is removed from the disintegrator in a gas return line 15 Interposition of a filter 16, a gas cooler 17 and a fine filter 18 fed to a pump 11 again.
  • a continuation of the metal powder from the Disintegrator 6 takes place with the interposition of a deflection valve 61 which a scrap portion can be fed to a powder scrap container 71, one Introduced into a separator 7.
  • Desired powder fractions are subsequently placed in a collecting container 8 introduced and at least temporarily in this by a mixed gas 14 homogenized.
  • a shut-off device 81 from the collecting container this can be done prepared metal powder of a molten metal 1 or a batch in or in several powder capsule (s) are introduced.
  • the atomization chamber 3 has one for this removable cover 31 of an upper cleaning opening and is on the discharge side to open by moving the deflection part 4. If the Feed pipe 51 or the like and removing the Disintegrator cover 62 can the riser 5 and the disintegrator 6 of Powder residues are cleaned. The same is for the separator 7 and Collection container 8 possible by removing the container covers.

Landscapes

  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Powder Metallurgy (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
EP99890354A 1998-12-09 1999-11-04 Procédé et installation de préparation de poudre métallique dans un conteneur par pulvérisation de métal fondu Expired - Lifetime EP1008407B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0206698A AT407620B (de) 1998-12-09 1998-12-09 Einrichtung und verfahren zur herstellung von metallpulver in kapseln
AT206698 1998-12-09

Publications (3)

Publication Number Publication Date
EP1008407A2 true EP1008407A2 (fr) 2000-06-14
EP1008407A3 EP1008407A3 (fr) 2004-06-09
EP1008407B1 EP1008407B1 (fr) 2005-08-17

Family

ID=3527050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99890354A Expired - Lifetime EP1008407B1 (fr) 1998-12-09 1999-11-04 Procédé et installation de préparation de poudre métallique dans un conteneur par pulvérisation de métal fondu

Country Status (11)

Country Link
US (1) US6405512B1 (fr)
EP (1) EP1008407B1 (fr)
JP (1) JP4148308B2 (fr)
AT (2) AT407620B (fr)
BR (1) BR9907410A (fr)
DE (1) DE59912426D1 (fr)
DK (1) DK1008407T3 (fr)
ES (1) ES2245083T3 (fr)
SI (1) SI1008407T1 (fr)
TW (1) TW453923B (fr)
UA (1) UA49067C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011111365A1 (de) 2011-08-29 2013-02-28 Eads Deutschland Gmbh Oberflächenpassivierung von aluminiumhaltigem Pulver
CN108247074A (zh) * 2018-04-23 2018-07-06 安徽哈特三维科技有限公司 一种用于制备低成本高纯净度球形金属粉体的装置及方法
US20220097132A1 (en) * 2016-05-03 2022-03-31 Raytheon Technologies Corporation Additive Manufactured Powder Processing System

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100488671C (zh) * 2007-02-09 2009-05-20 北京蓝景创新科技有限公司 金属粉末制备装置
DE102007027110A1 (de) * 2007-06-13 2008-12-18 Wacker Chemie Ag Verfahren und Vorrichtung zum Verpacken von polykristallinem Siliciumbruch
DE102013105371B4 (de) * 2013-05-24 2021-02-25 BinNova GmbH & Co. KG Verfahren zum Herstellen mikrofeiner Fasern und Vorrichtung zur Durchführung des Verfahrens
IN2013CH04500A (fr) 2013-10-04 2015-04-10 Kennametal India Ltd
EP3747574A1 (fr) * 2019-06-05 2020-12-09 Hightech Metal ProzessentwicklungsgesellschaftmbH Procédé et dispositif de fabrication de poudre de matière
CN111957955B (zh) * 2020-08-11 2022-05-27 杭州富阳横山复合材料有限公司 一种粉末冶金的压制设备

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3695795A (en) * 1970-03-20 1972-10-03 Conn Eng Assoc Corp Production of powdered metal
SE421758B (sv) 1970-11-11 1982-02-01 Uddeholms Ab Anordning enligt svenskt patent 6916675-9 for granulering av smelt metall
US4124377A (en) * 1977-07-20 1978-11-07 Rutger Larson Konsult Ab Method and apparatus for producing atomized metal powder
SE425837B (sv) * 1979-05-31 1982-11-15 Asea Ab Anleggning for gasatomisering av en smelta, innefattande kylorgan
US5024695A (en) * 1984-07-26 1991-06-18 Ultrafine Powder Technology, Inc. Fine hollow particles of metals and metal alloys and their production
DE3546040A1 (de) * 1985-12-24 1987-07-02 Eckart Standard Bronzepulver Vorrichtung zur herstellung von metallpulver aus einer metallschmelze
SE461848B (sv) * 1987-12-09 1990-04-02 Hg Tech Ab Foerfarande foer atomisering av vaetskor och anordning foer genomfoerande av foerfarandet
EP0325676B1 (fr) * 1988-01-29 1993-01-07 Norsk Hydro A/S Installation pour la préparation de poudre métallique
DE3913649A1 (de) * 1989-04-26 1991-01-17 Krupp Pulvermetall Gmbh Verfahren und anlage zum herstellen metallischer pulver aus einer metallschmelze durch gasverduesen
US5272718A (en) * 1990-04-09 1993-12-21 Leybold Aktiengesellschaft Method and apparatus for forming a stream of molten material
DE4011392B4 (de) * 1990-04-09 2004-04-15 Ald Vacuum Technologies Ag Verfahren und Vorrichtung zur Formung eines Gießstrahls
DE4117140A1 (de) * 1991-05-25 1992-11-26 Wolfgang Seidler Verfahren und vorrichtung zur herstellung von pulvern und granulaten in kugelform aus einer schmelze
US5433978A (en) * 1993-09-27 1995-07-18 Iowa State University Research Foundation, Inc. Method of making quasicrystal alloy powder, protective coatings and articles

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011111365A1 (de) 2011-08-29 2013-02-28 Eads Deutschland Gmbh Oberflächenpassivierung von aluminiumhaltigem Pulver
WO2013029589A1 (fr) 2011-08-29 2013-03-07 Eads Deutschland Gmbh Passivation de surface de poudre à base d'aluminium
EP3590634A2 (fr) 2011-08-29 2020-01-08 Airbus Defence and Space GmbH Passivation de surface du poudre contenant de l'aluminium
US20220097132A1 (en) * 2016-05-03 2022-03-31 Raytheon Technologies Corporation Additive Manufactured Powder Processing System
CN108247074A (zh) * 2018-04-23 2018-07-06 安徽哈特三维科技有限公司 一种用于制备低成本高纯净度球形金属粉体的装置及方法

Also Published As

Publication number Publication date
TW453923B (en) 2001-09-11
JP4148308B2 (ja) 2008-09-10
SI1008407T1 (sl) 2006-02-28
DE59912426D1 (de) 2005-09-22
DK1008407T3 (da) 2005-12-12
ATE302082T1 (de) 2005-09-15
UA49067C2 (uk) 2002-09-16
JP2000256709A (ja) 2000-09-19
ES2245083T3 (es) 2005-12-16
BR9907410A (pt) 2001-03-20
ATA206698A (de) 2000-09-15
US6405512B1 (en) 2002-06-18
EP1008407A3 (fr) 2004-06-09
AT407620B (de) 2001-05-25
EP1008407B1 (fr) 2005-08-17

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