WO2004063406A2 - Verfahren zur herstellung von metallschaumkörpern - Google Patents
Verfahren zur herstellung von metallschaumkörpern Download PDFInfo
- Publication number
- WO2004063406A2 WO2004063406A2 PCT/AT2003/000380 AT0300380W WO2004063406A2 WO 2004063406 A2 WO2004063406 A2 WO 2004063406A2 AT 0300380 W AT0300380 W AT 0300380W WO 2004063406 A2 WO2004063406 A2 WO 2004063406A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- metal
- metal foam
- melt
- liquid metal
- Prior art date
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
-
- 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
-
- 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
-
- 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
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003287755A AU2003287755A1 (en) | 2003-01-13 | 2003-12-22 | Method for producing metal foam bodies |
US10/542,325 US7396380B2 (en) | 2003-01-13 | 2003-12-22 | Method for producing metal foam bodies |
JP2004565852A JP2006513319A (ja) | 2003-01-13 | 2003-12-22 | 金属発泡体の製造方法 |
CA 2513178 CA2513178A1 (en) | 2003-01-13 | 2003-12-22 | Method for producing metal foam bodies |
EP03779551A EP1592818A2 (de) | 2003-01-13 | 2003-12-22 | Verfahren zur herstellung von metallschaumkörpern |
BR0317993A BR0317993A (pt) | 2003-01-13 | 2003-12-22 | Processo para preparação de corpos esponjosos de metal |
MXPA05007507A MXPA05007507A (es) | 2003-01-13 | 2003-12-22 | Metodo para la produccion de cuerpos de espuma metalica. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0003303A AT413344B (de) | 2003-01-13 | 2003-01-13 | Verfahren zur herstellung von metallschaumkörpern |
ATA33/2003 | 2003-01-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004063406A2 true WO2004063406A2 (de) | 2004-07-29 |
WO2004063406A3 WO2004063406A3 (de) | 2004-12-29 |
Family
ID=32686590
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2003/000380 WO2004063406A2 (de) | 2003-01-13 | 2003-12-22 | Verfahren zur herstellung von metallschaumkörpern |
Country Status (10)
Country | Link |
---|---|
US (1) | US7396380B2 (de) |
EP (1) | EP1592818A2 (de) |
JP (1) | JP2006513319A (de) |
CN (1) | CN1738919A (de) |
AT (1) | AT413344B (de) |
AU (1) | AU2003287755A1 (de) |
BR (1) | BR0317993A (de) |
CA (1) | CA2513178A1 (de) |
MX (1) | MXPA05007507A (de) |
WO (1) | WO2004063406A2 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005037305A1 (de) * | 2005-08-02 | 2007-03-29 | Hahn-Meitner-Institut 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 |
US7929489B2 (en) | 2005-07-08 | 2011-04-19 | Huawei Technologies Co., Ltd. | Method and apparatus for discovering network service provider |
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 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE502004004644D1 (de) * | 2004-06-03 | 2007-09-27 | Alulight Internat Gmbh | Verfahren zum Recyclen von Leichtmetallteilen |
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 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3692513A (en) * | 1970-10-30 | 1972-09-19 | Ethyl Corp | Process for producing foamed metal |
AT405946B (de) * | 1998-01-16 | 1999-12-27 | Illichmann Gmbh Leichtmetallgu | Verfahren zum herstellen von pulvermetallurgischem halbzeug |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55138039A (en) * | 1979-04-13 | 1980-10-28 | Agency Of Ind Science & Technol | Production of foamed aluminum |
CA1267550A (en) * | 1985-07-19 | 1990-04-10 | Kozo Iizuka, Director-General Of The Agency Of Industrial Science And Technology | Foamed metal and method of producing same |
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 (en) * | 1992-07-10 | 1998-02-03 | Adam Jan Gesing | Process and apparatus for melting metals while reducing losses due to oxidation |
CA2087791A1 (en) * | 1993-01-21 | 1994-07-22 | Martin Thomas | Production of particle-stabilized metal foams |
US5632319A (en) * | 1995-10-04 | 1997-05-27 | Industrial Technology Research Institute | Method for manufacturing environmentally conscious foamed aluminum materials |
WO1998011264A1 (en) * | 1996-09-16 | 1998-03-19 | 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 |
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 |
-
2003
- 2003-01-13 AT AT0003303A patent/AT413344B/de not_active IP Right Cessation
- 2003-12-22 CN CNA2003801087394A patent/CN1738919A/zh active Pending
- 2003-12-22 WO PCT/AT2003/000380 patent/WO2004063406A2/de active Application Filing
- 2003-12-22 BR BR0317993A patent/BR0317993A/pt not_active IP Right Cessation
- 2003-12-22 EP EP03779551A patent/EP1592818A2/de not_active Withdrawn
- 2003-12-22 US US10/542,325 patent/US7396380B2/en not_active Expired - Fee Related
- 2003-12-22 AU AU2003287755A patent/AU2003287755A1/en not_active Abandoned
- 2003-12-22 CA CA 2513178 patent/CA2513178A1/en not_active Abandoned
- 2003-12-22 MX MXPA05007507A patent/MXPA05007507A/es active IP Right Grant
- 2003-12-22 JP JP2004565852A patent/JP2006513319A/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3692513A (en) * | 1970-10-30 | 1972-09-19 | Ethyl Corp | Process for producing foamed metal |
AT405946B (de) * | 1998-01-16 | 1999-12-27 | Illichmann Gmbh Leichtmetallgu | Verfahren zum herstellen von pulvermetallurgischem halbzeug |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN Bd. 0133, Nr. 72 (C-627), 17. August 1989 (1989-08-17) & JP 1 127631 A (AGENCY OF IND SCIENCE & TECHNOL), 19. Mai 1989 (1989-05-19) * |
See also references of EP1592818A2 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7929489B2 (en) | 2005-07-08 | 2011-04-19 | Huawei Technologies Co., Ltd. | Method and apparatus for discovering network service provider |
DE102005037305A1 (de) * | 2005-08-02 | 2007-03-29 | Hahn-Meitner-Institut Berlin Gmbh | Verfahren zur pulvermetallurgischen Herstellung von Metallschaumstoff und von Teilen aus Metallschaumstoff |
DE102005037305B4 (de) * | 2005-08-02 | 2007-05-16 | Hahn Meitner Inst Berlin Gmbh | Verfahren zur pulvermetallurgischen Herstellung von Metallschaumstoff und von Teilen aus Metallschaumstoff |
US8562904B2 (en) | 2005-08-02 | 2013-10-22 | Helmholtz-Zentrum Berlin Fuer Materialien Und Energie Gmbh | Method for the powder-metallurgical production of metal foamed material and of parts made of metal foamed material |
DE102006031213B3 (de) * | 2006-07-03 | 2007-09-06 | Hahn-Meitner-Institut Berlin Gmbh | Verfahren zur Herstellung von Metallschäumen und Metallschaum |
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 |
Also Published As
Publication number | Publication date |
---|---|
AU2003287755A1 (en) | 2004-08-10 |
MXPA05007507A (es) | 2006-01-27 |
AT413344B (de) | 2006-02-15 |
ATA332003A (de) | 2005-07-15 |
CA2513178A1 (en) | 2004-07-29 |
WO2004063406A3 (de) | 2004-12-29 |
CN1738919A (zh) | 2006-02-22 |
BR0317993A (pt) | 2005-12-06 |
JP2006513319A (ja) | 2006-04-20 |
US20060150771A1 (en) | 2006-07-13 |
US7396380B2 (en) | 2008-07-08 |
EP1592818A2 (de) | 2005-11-09 |
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