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EP1592818A2 - Proc d pour fabriquer des l ments en mousse m tallique - Google Patents

Proc d pour fabriquer des l ments en mousse m tallique

Info

Publication number
EP1592818A2
EP1592818A2 EP03779551A EP03779551A EP1592818A2 EP 1592818 A2 EP1592818 A2 EP 1592818A2 EP 03779551 A EP03779551 A EP 03779551A EP 03779551 A EP03779551 A EP 03779551A EP 1592818 A2 EP1592818 A2 EP 1592818A2
Authority
EP
European Patent Office
Prior art keywords
gas
metal
metal foam
melt
liquid 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.)
Withdrawn
Application number
EP03779551A
Other languages
German (de)
English (en)
Inventor
Richard Kretz
Karin Renger
Gottfried Rettenbacher
Anton Hinterberger
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.)
Alulight International GmbH
Original Assignee
Alulight International 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 Alulight International GmbH filed Critical Alulight International GmbH
Publication of EP1592818A2 publication Critical patent/EP1592818A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/005—Casting metal foams
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
    • C22B26/20—Obtaining alkaline earth metals or magnesium
    • C22B26/22—Obtaining magnesium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
    • 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
    • C22C1/08—Alloys with open or closed pores
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • 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
    • C22C1/08—Alloys with open or closed pores
    • C22C1/083—Foaming process in molten metal other than by powder metallurgy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/1234—Honeycomb, or with grain orientation or elongated elements in defined angular relationship in respective components [e.g., parallel, inter- secting, etc.]

Definitions

  • the invention relates to a method for producing a metal foam body, wherein a gas-containing melt is created and the melt is allowed to solidify to form a metal foam body.
  • Porous objects are referred to as metal foam bodies, in which gas-filled pores are embedded in a solid matrix which consists of metal or at least has a predominant proportion by weight of metal.
  • the embedded pores are generally spherical and / or ellipsoidal in shape and separated from one another by walls made of matrix material.
  • metal foam bodies can be essentially dense or pore-free in areas of outer surfaces.
  • a porous inner part is at least partially surrounded by a dense outer layer or a dense skin.
  • metal foam bodies due to the high porosity and low density that can be achieved in terms of process technology, and special properties that are advantageous for many applications, such as good sound insulation, relatively low thermal conductivity in comparison with dense matrix material or high deformability under impact loads, a wide range of possible applications is as lightweight functional components.
  • the quality criteria include molded body density, number, shape, size of the pores and distribution thereof in the molded body and, if a metal foam body is formed with a dense or non-porous outer layer, a condition of external surfaces.
  • powder metallurgical processes have been proposed, for example in US 3,087,807 or DE 4018 360 C1.
  • a metal powder is mixed with a blowing agent powder and the mixed powder material is compacted in the course of forming or by pressing.
  • the compact material is then heated until gas is split off from the propellant and the associated pore formation in the previously compacted material.
  • high quality metal foam bodies can be provided.
  • these methods are extremely complex with regard to the material used and the devices required, because it is necessary to produce and use at least two powder components.
  • the individual powder components must also be intimately mixed before heating and the powder grains are welded together, for example by hot isostatic pressing, in order to achieve pores with a homogeneous distribution in the metal foam body produced.
  • melt metallurgical processes are known.
  • a foamable metal melt is created and then a gas is introduced into the melt, whereby a flowable metal foam is generated which collects on the surface of the melt.
  • the metal foam present on the surface of the melt can, as disclosed in EP 666784 B, be processed into molded articles due to its flowability by careful pressing while maintaining the pore structure.
  • a disadvantage of these melt metallurgical processes is that a metal melt cannot be foamed in the pure state.
  • the melt must be mixed with a viscosity-increasing agent, for example an inert gas (GB 1, 287.994), or with ceramic particles (EP 0666784 B) before carrying out the foaming.
  • the metal foam accumulated on the melt surface is flowable. Although this is favorable for a shaping processing of the metal foam, it can, as a result of a lack of stabilization of the metal walls, lead to a partial collapse of the metal foam formed and thus to an uncontrollable formation of dense zones inside an object created in this way.
  • melt metallurgical processes processes have also been proposed which can be carried out without additives which increase the viscosity. It is known, for example, that hydrogen can be dissolved in a molten metal under high pressure and at high temperatures, which, due to a jump in solubility when the melt solidifies, can be released by the latter with the formation of bubbles. The bubbles can be trapped during the solidification of a melt, thereby forming a porous metallic object. With such processes, dense metallic starting materials are directly in the body with pores convertible, for which, however, a considerable outlay on equipment is necessary. In particular, for the introduction of hydrogen into a melt, autoclaves that withstand high pressures and high temperatures are required.
  • feedstock is melted under atmospheric pressure and gas and / or subsequently gas is introduced into the liquid metal, whereupon the liquid metal is brought into a mold and allowed to solidify at least temporarily at reduced ambient pressure.
  • Solidification of the melt at reduced ambient pressure results in the formation of a large number of gas bubbles in the melt, which, however, are enclosed in the melt due to the onset or progressive solidification of the melt, which is why metal foam bodies produced according to the invention have a low density.
  • a method according to the invention has the advantage of greater safety for operating personnel, since the use of gases at high pressures and high temperatures can be avoided while carrying out a method according to the invention.
  • a brief heating of pretreated feedstock to the decomposition temperature of a gas-releasing or gas-releasing compound which reduces the residence time in an oven and increases the material throughput.
  • at least parts of the feed material are converted into at least one compound before melting, which releases at least one gas which is soluble in the liquid metal in the region of and / or over the melting interval, in a preferred development by contact with a gas or gas mixture. It is advantageous in this regard that the extent of a conversion of the feed material in zones near the surface and thus an amount of the gas (s) introduced during the melting process can be precisely controlled via the gas stream supplied and the treatment time.
  • a conversion of at least parts of the feed material before melting into at least one compound which releases at least one gas which is soluble in the liquid metal in the region of and / or over the melting interval thereof can preferably also be carried out by contact with an aerosol he follows.
  • an aerosol on the one hand, a reactant can be supplied in liquid form diluted with a carrier gas and high local heating of a feed material during a conversion can be avoided.
  • the carrier gas causes heat removal or cooling of the treated material.
  • connection is at a temperature of gas at most 250 ° C, preferably at most 150 ° C, above melting or solidus temperature of the metal.
  • Shaped bodies made of high quality metal foam can be produced in a particularly simple manner if the feed material is formed from a light metal, in particular from magnesium or a magnesium alloy, because these metals consistently have good dissolving properties for gases. Therefore, when using light metals in a process according to the invention, a high porosity of metal foam bodies can be achieved.
  • the highest porosity of the metal foam body created is achieved with simple devices if, in a method according to the invention, the solidification of the liquid metal takes place at an ambient pressure in the range from 0.03 bar to 0.2 bar. Ambient pressures in this selected area can be adjusted easily and precisely in terms of process technology and can be generated with the simplest devices, for example with so-called water jet pumps.
  • the mold is preheated before the liquid metal is introduced. This measure ensures that a metal foam body is formed with an at least largely dense outer layer, at the same time preventing cracks on or in the dense outer or surface layer, as can occur during quenching.
  • Blocks of an AZ 91 alloy that is a magnesium alloy with approximately 9 percent by weight aluminum and approximately 1 percent by weight zinc, balance magnesium, were produced. The material created was then stored in an open environment for several days and was exposed to moist air and rain.
  • blocks were melted in melting vessels under atmospheric pressure, an atmosphere consisting of 1% by volume SF 6 and 99% by volume argon.
  • a melt was heated to 685 ° C; then about 70 grams of this melt were placed in a crucible preheated to a temperature of 300 ° C.
  • the filled crucible was then placed in a vacuum chamber, the chamber closed and immediately afterwards a vacuum of 80 millibars was generated in the chamber. This vacuum was maintained for seven minutes, after which the chamber was vented and opened and the crucible removed.
  • a porous metal foam body with pores in its interior with a density of approximately 0.95 g / cm 3 had formed in the crucible.
  • An outer surface of the body was essentially dense and crack-free.
  • a cross-sectional view of the foam body after cutting it open showed that the pores formed had a diameter of about 1 to 4 millimeters and were evenly distributed over the cross-sectional area.
  • a dense outer layer or skin was about 1 millimeter thick.
  • Example 1 In a further experiment, the procedure was analogous to that of Example 1, using a heat-insulated crucible. A metal foam body with a substantially dense and crack-free surface was obtained. The pore structure corresponded to that described in Example 1. Compared to one. Metal foam body described in Example 1 and produced in a non-heat-insulated crucible could be found that the density of the metal foam body was significantly lower at about 0.75 g / cm 3 .
  • Example 1 The experiments mentioned in Examples 1 and 2 were repeated with commercially available magnesium scrap parts of the AZ 91 grade. Analogous results to Example 1 or Example 2 were achieved. Accordingly, the method according to the invention also offers a possibility of converting recycling material into high-quality functional components in a simple way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un procédé pour fabriquer un élément en mousse métallique, selon lequel on prépare une matière fondue chargée en gaz, laquelle se solidifie en formant un élément en mousse métallique. L'invention vise à fabriquer des éléments en mousse métallique de formes déterminées et de grande qualité sans appareillage trop complexe et en réduisant les risques en termes de sécurité du personnel. A cet effet, la matière employée est fondue sous pression atmosphérique et du gaz est introduit dans le métal liquide pendant et/ou après l'opération de fonte. Ensuite, le métal liquide est mis dans un moule et il se solidifie, la pression environnante étant réduite au moins de temps à autre.
EP03779551A 2003-01-13 2003-12-22 Proc d pour fabriquer des l ments en mousse m tallique Withdrawn EP1592818A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT332003 2003-01-13
AT0003303A AT413344B (de) 2003-01-13 2003-01-13 Verfahren zur herstellung von metallschaumkörpern
PCT/AT2003/000380 WO2004063406A2 (fr) 2003-01-13 2003-12-22 Procédé pour fabriquer des éléments en mousse métallique

Publications (1)

Publication Number Publication Date
EP1592818A2 true EP1592818A2 (fr) 2005-11-09

Family

ID=32686590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03779551A Withdrawn EP1592818A2 (fr) 2003-01-13 2003-12-22 Proc d pour fabriquer des l ments en mousse m tallique

Country Status (10)

Country Link
US (1) US7396380B2 (fr)
EP (1) EP1592818A2 (fr)
JP (1) JP2006513319A (fr)
CN (1) CN1738919A (fr)
AT (1) AT413344B (fr)
AU (1) AU2003287755A1 (fr)
BR (1) BR0317993A (fr)
CA (1) CA2513178A1 (fr)
MX (1) MXPA05007507A (fr)
WO (1) WO2004063406A2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1602739B1 (fr) * 2004-06-03 2007-08-15 Alulight International GmbH Procédé de recyclage de pièces en métal léger
CN100452921C (zh) 2005-07-08 2009-01-14 华为技术有限公司 实现网络服务提供商发现的方法及相应装置
DE102005037305B4 (de) * 2005-08-02 2007-05-16 Hahn Meitner Inst Berlin Gmbh Verfahren zur pulvermetallurgischen Herstellung von Metallschaumstoff und von Teilen aus Metallschaumstoff
DE102006031213B3 (de) * 2006-07-03 2007-09-06 Hahn-Meitner-Institut Berlin Gmbh Verfahren zur Herstellung von Metallschäumen und Metallschaum
AT503824B1 (de) * 2006-07-13 2009-07-15 Huette Klein Reichenbach Gmbh Metallformkörper und verfahren zu dessen herstellung
DE102008037200B4 (de) * 2008-08-11 2015-07-09 Aap Implantate Ag Verwendung eines Druckgussverfahrens zur Herstellung eines Implantats aus Magnesium sowie Magnesiumlegierung
DE102009020004A1 (de) * 2009-05-05 2010-11-11 Helmholtz-Zentrum Berlin Für Materialien Und Energie Gmbh Pulvermetallurgisches Verfahren zur Herstellung von Metallschaum
US8820610B2 (en) * 2009-10-14 2014-09-02 National University Corporation Gunma University Using friction stir processing to form foamed metal precursors
JP5773424B2 (ja) * 2011-06-24 2015-09-02 国立大学法人群馬大学 発泡金属の製造方法及び発泡金属の製造装置
DE102011111614B3 (de) * 2011-08-25 2013-01-03 Helmholtz-Zentrum Berlin Für Materialien Und Energie Gmbh Schmelzmetallurgisches Verfahren zur Herstellung eines Metallschaumkörpers und Anordnung zur Durchführung des Verfahrens

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632319A (en) * 1995-10-04 1997-05-27 Industrial Technology Research Institute Method for manufacturing environmentally conscious foamed aluminum materials

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3692513A (en) * 1970-10-30 1972-09-19 Ethyl Corp Process for producing foamed metal
JPS55138039A (en) * 1979-04-13 1980-10-28 Agency Of Ind Science & Technol Production of foamed aluminum
CA1267550A (fr) * 1985-07-19 1990-04-10 Kozo Iizuka, Director-General Of The Agency Of Industrial Science And Technology Metal mousse, et sa production
JPH01127631A (ja) 1987-11-10 1989-05-19 Agency Of Ind Science & Technol 発泡金属の製造方法
US5181549A (en) * 1991-04-29 1993-01-26 Dmk Tek, Inc. Method for manufacturing porous articles
CA2073625C (fr) * 1992-07-10 1998-02-03 Adam Jan Gesing Procede et installation pour la fusion des metaux permettant de reduire les pertes dues a l'oxydation
CA2087791A1 (fr) * 1993-01-21 1994-07-22 Martin Thomas Production de mousses de metal stabilisees au moyen de particules
AU4642997A (en) * 1996-09-16 1998-04-02 Ashurst Technology Corporation Ltd. Production of cast products with controlled density by controlling gas concentration in a material
US5981919A (en) * 1997-02-11 1999-11-09 Bouillon, Inc. Method and apparatus for characterizing and controlling the heat treatment of a metal alloy
JP3319347B2 (ja) * 1997-07-08 2002-08-26 松下電器産業株式会社 記録再生装置
AT405946B (de) * 1998-01-16 1999-12-27 Illichmann Gmbh Leichtmetallgu Verfahren zum herstellen von pulvermetallurgischem halbzeug
GB9912215D0 (en) * 1999-05-26 1999-07-28 Boc Group Plc Reticulated foam structures
KR20020034327A (ko) * 2000-11-01 2002-05-09 권영기 저압 연속식 발포 금속 제조 방법 및 장치
US6915834B2 (en) * 2001-02-01 2005-07-12 Goldschmidt Ag Process for producing metal foam and metal body produced using this process

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632319A (en) * 1995-10-04 1997-05-27 Industrial Technology Research Institute Method for manufacturing environmentally conscious foamed aluminum materials

Also Published As

Publication number Publication date
US20060150771A1 (en) 2006-07-13
MXPA05007507A (es) 2006-01-27
CN1738919A (zh) 2006-02-22
US7396380B2 (en) 2008-07-08
JP2006513319A (ja) 2006-04-20
CA2513178A1 (fr) 2004-07-29
AU2003287755A1 (en) 2004-08-10
WO2004063406A3 (fr) 2004-12-29
BR0317993A (pt) 2005-12-06
ATA332003A (de) 2005-07-15
WO2004063406A2 (fr) 2004-07-29
AT413344B (de) 2006-02-15

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