EP1266973A2 - Procédé de réalisation d'un corps moulé léger et corps moulé en mousse métallique - Google Patents

Procédé de réalisation d'un corps moulé léger et corps moulé en mousse métallique Download PDF

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Publication number
EP1266973A2
EP1266973A2 EP02450137A EP02450137A EP1266973A2 EP 1266973 A2 EP1266973 A2 EP 1266973A2 EP 02450137 A EP02450137 A EP 02450137A EP 02450137 A EP02450137 A EP 02450137A EP 1266973 A2 EP1266973 A2 EP 1266973A2
Authority
EP
European Patent Office
Prior art keywords
metal
cavities
metal foam
particles
shaped body
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
EP02450137A
Other languages
German (de)
English (en)
Other versions
EP1266973A3 (fr
EP1266973B1 (fr
Inventor
Franz Dobesberger
Herbert Flankl
Dietmar Leitlmeier
Alois Birgmann
Peter Schulz
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.)
Huette Klein Reichenbach GmbH
Original Assignee
Huette Klein Reichenbach 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 Huette Klein Reichenbach GmbH filed Critical Huette Klein Reichenbach GmbH
Priority to SI200231055T priority Critical patent/SI1266973T1/sl
Publication of EP1266973A2 publication Critical patent/EP1266973A2/fr
Publication of EP1266973A3 publication Critical patent/EP1266973A3/fr
Application granted granted Critical
Publication of EP1266973B1 publication Critical patent/EP1266973B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • 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
    • C22C1/086—Gas foaming process
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • B22F3/1103—Making porous workpieces or articles with particular physical characteristics
    • B22F2003/1106—Product comprising closed porosity
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Definitions

  • the invention relates to a method for producing a lightweight Shaped body, in which from a particle metal melt through Introducing gas or gas mixtures into a metal foam formed this at least partially introduced into a mold and its liquid phase in it is frozen.
  • the invention further comprises a lightweight molded body made of metal foam consisting of a metal matrix, in which particles are embedded and which a variety of substantially spherical and / or substantially ellipsoidal Encloses cavities.
  • Moldings made of metal foam naturally have a low density and have special mechanical material properties due to the structure.
  • Moldings made of metal foam naturally have a low density and have special mechanical material properties due to the structure.
  • Such bodies when applying two- or three-dimensional Compression stresses large deformations with degrees of compression up to 70% and more become.
  • These materials with special properties are in the technological Application, for example as an energy absorber in automotive engineering and the like, can be used with advantage.
  • EP-483 184 B describes a method for producing a particle-reinforced one Metal foam has become known, according to which cell-forming gas in a Introduced metal melt with finely divided reinforcing agents, foamed metal composite material formed and from the surface of the melted material, the accumulated foam is removed and solidified is left.
  • this metal foam has bubbles of uncontrolled size or size distribution, resulting in a highly blurred property profile of the Foam or molded body results as well as functional uncertainties he brings.
  • Another lightweight metal body according to EP 545 957 B1 and US 5 221 234 has a large number of closed and isolated, generally spherical pores with sizes in the range from 10 to 500 ⁇ m. Such small pores with large differences in diameter can indeed give a metal body formed with aluminum a lower specific weight than the solid material, a density of less than 1.0 g / cm 3 and a degree of compression of over 60% of the material under defined conditions are usually not reachable.
  • the invention seeks to remedy the situation and aims at a method of type mentioned for the manufacture of a lightweight molded body specify with which the inner body structure can be formed such that the Material has essentially precise mechanical characteristics.
  • the object of the invention is achieved in that a flowable metal foam with a monomodal distribution of the dimensions of the cavities and one proportionally maximum longitudinal extent thereof in the range between 1.0 and 30.0 mm manufactured, placed in a mold or mold and in this is compressed substantially under all-round pressure, the hollow spaces including particle-containing molten metal walls at least partially flat areas are given and the heat of solidification the melt is removed.
  • the advantages achieved with the invention can be seen essentially in the fact that a monomodal distribution of the dimensions of the cavities in the metal foam Prerequisite for a material behavior under certain stress conditions he brings.
  • the proportionate maximum diameter of the cavities is important for the height of the elastic limit of the material and the tolerable specific Surface stress when the part is subjected to compressive stress.
  • Boundary walls and their node areas in the foam material for one mechanical support or buckling load can be set or shaped favorably. This means that when a defined value is exceeded Tension limit a buckling of the foam walls or a collapse of the Pores and energy absorption with high degrees of deformation or compression little solidification of the light body takes place.
  • the further object of the invention in particular with regard to a desired Material behavior under mechanical load is solved in that the Metal foam of the molded body when viewed spatially a monomodal Distribution of the maximum longitudinal extent of the cavities in the area between 1.0 and 30.0 mm.
  • the accuracy of the transition from an elastic change in shape plastic deformation of the material depending on the compressive stress be further increased if the spatial consideration of the metal foam Ratio of the maximum longitudinal extensions of two different ones Cavities on average over at least 20 pairs smaller than 30, preferably smaller than 15 and in particular less than 5. These values refer to created Cavities in the absence of solidification voids in the molded body.
  • Particularly light molded articles can be produced according to the invention per se if the Metal matrix made of a light metal, preferably aluminum or one Aluminum alloy.
  • the particles embedded in the metal matrix have a size of 1 to 50 um, preferably 3 to 20 microns, is a particularly advantageous Weight / property ratio achievable.
  • non-metallic particles preferably SiC particles and / or Al 2 O 3 particles and / or those from intermetallic phases
  • volume portion the embedded particles in the metal matrix between 10% by volume and 30% by volume, preferably between 15% by volume and 30% by volume.
  • the favorable weight / property ratio of a lightweight molded body of the type according to the invention can be increased if the density of the metal foam is less than 1.05 g / cm 3 , preferably less than 0.7 g / cm 3 , in particular less than 0.3 g / cm 3 .
  • the stress as a function of the compression deformation is shown in comparison in FIG. 3 on the test results of three shaped bodies.
  • the structure of the lightweight moldings 1 and 2 with a density of 0.091 gcm -3 and 0.114 gcm -3 was in accordance with the invention, the comparison body 3 had a bimodal distribution of the dimensions of the cavities with material concentrations in the nodes of the foam walls.
  • an extremely low degree of solidification can be determined up to a degree of compression of approximately 70%.
  • the comparative body 3 shows a significant solidification of the material up to a degree of compression of approximately 45%, which increases even further from this value. This indicates an effect of the bimodal distribution of the cavity dimensions.
  • Fig. 4 shows knot shapes in the foam wall of light bodies using sectional images.
  • A shows a sharp-edged knot of the wall between three cavities. Such knots tend to crack and break early in the connection area.
  • Figure B shows a thickened wall knot. This knot formation leads to an increased specific weight and an unfavorable development of the force components when the body is under compression.
  • Picture C shows a knot with wall parts, whereby both the thickness of the walls and the knot mass are favorably designed with regard to a high compression deformation with little solidification of the body at high compression levels.
  • metal foam bodies formed according to the invention are shown in a top view without compression, the gas being introduced into the melt with protruding protruding inlet pipes with different separation parameters for the bubbles.
  • a monomodal distribution of the respective dimensions of the gas bubbles can be seen.
  • the body according to picture A has a specific weight of 0.1 gcm -3
  • those according to picture B and picture C have a specific weight of 0.2 gcm -3 and 0.4 gcm -3 .
  • Computer tomography records can be used to calculate values of the local density (density mapping) can be used.
  • An averaging process for Calculation of the local density allows the material distribution between the Determine averaging volumes. Diagrams of the calculated density values of Studies can shed light on the homogeneity of a lightweight Give shaped body.
  • the relative frequency of the mean local density in a molded body according to the invention is designated 1 and can be seen in a comparative body 2.
  • the average local density of the body 1 has a narrow maximum at about 0.22 gcm -3 , which demonstrates a monomodal distribution of the dimensions of the cavities and a narrow range of the proportionally maximum longitudinal extent thereof.
  • the multimodal reference block is characterized by a broad course of the mean local density values, which shows a clear slump.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Continuous Casting (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)
EP02450137.1A 2001-06-15 2002-06-14 Procédé de réalisation d'un corps moulé léger et corps moulé en mousse métallique Expired - Lifetime EP1266973B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200231055T SI1266973T1 (sl) 2001-06-15 2002-06-14 Postopek izdelave lahkega ulitka in ulitek iz penjene kovine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0093501A AT410103B (de) 2001-06-15 2001-06-15 Verfahren zur herstellung eines leichtgewichtigen formkörpers und formkörper aus metallschaum
AT9352001 2001-06-15

Publications (3)

Publication Number Publication Date
EP1266973A2 true EP1266973A2 (fr) 2002-12-18
EP1266973A3 EP1266973A3 (fr) 2004-08-18
EP1266973B1 EP1266973B1 (fr) 2015-03-04

Family

ID=3683236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02450137.1A Expired - Lifetime EP1266973B1 (fr) 2001-06-15 2002-06-14 Procédé de réalisation d'un corps moulé léger et corps moulé en mousse métallique

Country Status (9)

Country Link
EP (1) EP1266973B1 (fr)
JP (1) JP4158170B2 (fr)
AT (1) AT410103B (fr)
CA (1) CA2390766C (fr)
CZ (1) CZ304437B6 (fr)
ES (1) ES2533772T3 (fr)
NO (1) NO20022756L (fr)
PT (1) PT1266973E (fr)
SI (1) SI1266973T1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1419835A1 (fr) * 2002-09-09 2004-05-19 Hütte Klein-Reichenbach Gesellschaft m.b.H. Procédé et dispositif pour la fabrication d'une mousse métallique fluide
EP1482062A1 (fr) * 2003-05-28 2004-12-01 Universität Hannover Procédé de moulage en coquille, procédé de moulage de mousse métallique et moule fermable de manière étanche pour la fabrication d'articles moulés
WO2019070487A1 (fr) * 2017-10-04 2019-04-11 Ih Holdings Limited Procédé de fabrication de mousses métalliques chargées
CN110438360A (zh) * 2019-08-20 2019-11-12 北京康普锡威科技有限公司 泡沫铝或铝合金材料的制备方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10325819B4 (de) * 2003-06-07 2005-06-23 Friedrich-Alexander-Universität Erlangen-Nürnberg Verfahren zur Herstellung eines Metallschaumkörpers
AT503824B1 (de) 2006-07-13 2009-07-15 Huette Klein Reichenbach Gmbh Metallformkörper und verfahren zu dessen herstellung
DE102008000100B4 (de) 2008-01-18 2013-10-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung eines leichtgewichtigen Grünkörpers, danach hergestellter leichtgewichtiger Grünkörper und Verfahren zur Herstellung eines leichtgewichtigen Formkörpers
JP5482658B2 (ja) * 2008-09-12 2014-05-07 国立大学法人群馬大学 発泡金属用前駆体および発泡金属の製造方法、並びに前記製造方法で製造された発泡金属用前駆体および発泡金属

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO172697C (no) * 1989-07-17 1993-08-25 Norsk Hydro As Fremgangsmaate ved fremstilling av partikkelforsterket metallskum og resulterende produkt
US5112697A (en) * 1989-09-06 1992-05-12 Alcan International Limited Stabilized metal foam body
US4973358A (en) * 1989-09-06 1990-11-27 Alcan International Limited Method of producing lightweight foamed metal
EP0587619B1 (fr) * 1991-05-31 1996-07-10 Alcan International Limited Procede et appareil de production de plaques profilees de metal expanse stabilise par particules
US5281251A (en) * 1992-11-04 1994-01-25 Alcan International Limited Process for shape casting of particle stabilized metal foam

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1419835A1 (fr) * 2002-09-09 2004-05-19 Hütte Klein-Reichenbach Gesellschaft m.b.H. Procédé et dispositif pour la fabrication d'une mousse métallique fluide
US7144636B2 (en) 2002-09-09 2006-12-05 Huette Klein-Reichenbach Gesellschaft M.B.H. Process and device for manufacturing free-flowing metal foam
US7959852B2 (en) 2002-09-09 2011-06-14 Hütte Klein-Reichenbach Gesellschaft M.B.H. Process and device for manufacturing free-flowing metal foam
EP1482062A1 (fr) * 2003-05-28 2004-12-01 Universität Hannover Procédé de moulage en coquille, procédé de moulage de mousse métallique et moule fermable de manière étanche pour la fabrication d'articles moulés
US7174946B2 (en) 2003-05-28 2007-02-13 The University Of Hannover Chill casting process and foam casting process as well as a pressure tight closable casting mold for manufacture of form parts
WO2019070487A1 (fr) * 2017-10-04 2019-04-11 Ih Holdings Limited Procédé de fabrication de mousses métalliques chargées
CN110438360A (zh) * 2019-08-20 2019-11-12 北京康普锡威科技有限公司 泡沫铝或铝合金材料的制备方法

Also Published As

Publication number Publication date
EP1266973A3 (fr) 2004-08-18
EP1266973B1 (fr) 2015-03-04
SI1266973T1 (sl) 2015-08-31
NO20022756L (no) 2002-12-16
CZ304437B6 (cs) 2014-05-07
ES2533772T3 (es) 2015-04-15
JP2003119526A (ja) 2003-04-23
NO20022756D0 (no) 2002-06-10
AT410103B (de) 2003-02-25
CZ20022035A3 (cs) 2003-02-12
PT1266973E (pt) 2015-04-28
ATA9352001A (de) 2002-06-15
JP4158170B2 (ja) 2008-10-01
CA2390766A1 (fr) 2002-12-15
CA2390766C (fr) 2007-06-12

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