EP1174200B1 - Procédé de coulée et noyau utilisé dans ce procédé - Google Patents

Procédé de coulée et noyau utilisé dans ce procédé Download PDF

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Publication number
EP1174200B1
EP1174200B1 EP01117615A EP01117615A EP1174200B1 EP 1174200 B1 EP1174200 B1 EP 1174200B1 EP 01117615 A EP01117615 A EP 01117615A EP 01117615 A EP01117615 A EP 01117615A EP 1174200 B1 EP1174200 B1 EP 1174200B1
Authority
EP
European Patent Office
Prior art keywords
melt
core
infiltration
phase
matrix
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.)
Expired - Lifetime
Application number
EP01117615A
Other languages
German (de)
English (en)
Other versions
EP1174200A3 (fr
EP1174200A2 (fr
Inventor
Wolfgang Dipl.-Ing. Beck
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.)
Adam Opel GmbH
Original Assignee
Adam Opel 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 Adam Opel GmbH filed Critical Adam Opel GmbH
Publication of EP1174200A2 publication Critical patent/EP1174200A2/fr
Publication of EP1174200A3 publication Critical patent/EP1174200A3/fr
Application granted granted Critical
Publication of EP1174200B1 publication Critical patent/EP1174200B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/007—Semi-solid pressure die casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
    • 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
    • C22C1/10—Alloys containing non-metals
    • C22C1/1005—Pretreatment of the non-metallic additives
    • C22C1/1015—Pretreatment of the non-metallic additives by preparing or treating a non-metallic additive preform
    • C22C1/1021—Pretreatment of the non-metallic additives by preparing or treating a non-metallic additive preform the preform being ceramic
    • 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
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt
    • C22C1/1073—Infiltration or casting under mechanical pressure, e.g. squeeze casting
    • 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

Definitions

  • the invention relates to a method for casting a light alloy consisting of a lost casting core, which consists of a traversed by infiltration channels matrix.
  • the components must be as light as possible.
  • the total weight of the vehicle is reduced, which is positively u. a.
  • the so-called unsprung chassis mass minimized, which has a positive effect on driving behavior and ride comfort.
  • a workpiece which consists of a lightweight material.
  • foam bodies of relatively high compressive strength and fine-pored to coarsely porous structure, which are held together by means of a shape-defining compound.
  • the foam body can z. B. be formed of a silicate mineral foam.
  • the formulation given in the specification gives foam bodies having a density of about 0.3 g / cm 3 .
  • the present invention takes up this consideration. However, it should be achieved even higher strength of the workpiece in lightweight construction.
  • the melt penetrates at least into the edge zone of the casting core and that formed by the solidified melt Cast body has a by the cellular structure (matrix) self-supporting structure.
  • the solidification of the melt in the outer periphery of the matrix of the casting core results in a macrostructure, which is known from statics as a vaulting effect and favors the reduction of material stress in the material upon attack of an externally acting load collective on the cast body.
  • the material areas of the matrix which delimit the infiltration channels consist of a light but dense material, so that these areas are not penetrated by the melt.
  • the material may be z. B. be a silicate foam.
  • such a matrix has a structure-borne sound damping effect with an eradication efficiency of up to 20% in the frequency spectrum between 80 and 800 Hz, so that a chain formation of chassis and drivetrain components and subsequent body structure components with internal foam structures sufficient insulation effect can be achieved without the use of eradication masses.
  • the infiltration channels can be easily reached by the melt, their space size should be at least three to five times larger than the crystal bodies of the light metal used for the melt.
  • the matrix consists of a larger number of mineral foam spheres which are glued to one another at the contact surfaces, thus forming a dense spherical matrix.
  • the diameter of the ball is between 1 and 8 mm. The bonding takes place with the aid of a suitable degassing binder for lost casting cores.
  • the filling of the infiltration channels of the core is carried out with a 100% liquid melt, wherein the infiltration progress is controlled by monitoring the pressure and the temperature of the melt. Due to the infiltration and the necessary period of time, heat is released into the matrix and the environment, so that the melt passes into the thixotropic (semi-solid) phase (cooling phase). This process is also monitored and controlled by means of temperature sensors. This phase is followed by a pressure phase in which the semi-solidified melt is pressurized. In this way, it is avoided that the cast workpiece receives too high a solidification porosity.
  • the casting core or preform is made of mineral foam balls, which consist essentially of a silicate whose temperature resistance is at least 700 ° C. These balls are mechanically compacted and glued together at the contact points with a binder. Due to their composition, the spheres have dimensional stability at isostatic pressures of up to 1000 bar. This ensures their dimensional stability throughout the casting process.
  • the interspaces of the spheres form coherent continuous infiltration channels whose spatial size is at least three to five times greater than the diameter of the crystal bodies in the molten metal.
  • This preform is placed in a casting mold, using receptacle and spacer to the mold or at the preform creates a gap, which is filled or encapsulated in the docking with the material namely magnesium or aluminum.
  • the casting phase is divided into three main phases, namely the docking, the infiltration and the pressure phase (thixocasting phase) just mentioned.
  • the docking phase the gap space is prefilled with the liquid melt virtually without pressure, wherein the melt has a temperature of about 630 ° C.
  • the melt has a temperature of 610-620 ° C. She is still liquid and her condition is still above the liquidus line. By exerting pressure on the melt from the outside, it penetrates into the outer infiltration channels between the balls and in this way fills at least the outer regions of the infiltration channels of the preform.
  • the depth of the edge zone of the casting core which is to be filled with the melt, can be controlled.
  • the temperature of the melt decreases, so that it goes into the thixotropic phase, ie in a semi-solid state. Again, this is monitored by a thermometer to initiate the beginning of the printing phase as a dynamic control feature.
  • the casting process is complete.
  • the casting receives a very good contour sharpness, which corresponds to the desired final contour, so that the workpiece does not need to be reworked. Only the casting system has to be removed by a cutting or cutting process.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Mold Materials And Core Materials (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Claims (8)

  1. Procédé pour couler un module à base de métal léger avec un noyau de coulée perdu, qui est composé d'une matrice traversée par des canaux d'infiltration,
    avec une phase d'intégration, dans laquelle la masse fondue liquide est introduite dans l'espace intermédiaire entre le noyau et une coque entourant le noyau, avec une phase d'infiltration, dans laquelle la masse fondue pénètre à faible pression dans l'état encore liquide dans les canaux d'infiltration de la zone périphérique du noyau,
    avec une phase de refroidissement, dans laquelle la masse fondue fait place à un état thixotrope, et
    avec une phase de pression, dans laquelle la masse fondue thixotrope est mise sous pression, afin d'éviter une porosité de solidification dans la pièce moulée.
  2. Procédé selon la revendication 1, caractérisé en ce que les zones de matériau de la matrice, qui délimitent les canaux d'infiltration, sont à base d'un matériau léger, mais dense, de sorte que ces zones ne sont pas traversées par la masse fondue.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la grandeur dans l'espace des canaux d'infiltration dans le noyau est au moins trois à cinq fois supérieure au diamètre des corps de cristal du métal léger utilisé pour la masse fondue.
  4. Procédé selon la revendication 2 ou 3, caractérisé en ce que la matrice est à base de boules de mousse minérale, qui sont collées entre elles sur les surfaces de contact.
  5. Procédé selon la revendication 4, caractérisé en ce que les diamètres des boules se situent entre un 1 et 8 mm.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la température de la masse fondue lors de la phase d'infiltration est précisément si élevée que celle-ci est liquide à 100%.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'opération de coulée est surveillée en particulier lors de la phase d'infiltration avec un capteur de pression et de température.
  8. Noyau de coulée en particulier pour une utilisation dans un procédé selon les revendications précédentes, caractérisé en ce que le noyau de coulée forme une matrice traversée par des canaux d'infiltration, laquelle est à base de boules de mousse minérale, lesquelles sont collées entre elles sur les surfaces de contact avec un liant.
EP01117615A 2000-07-20 2001-07-17 Procédé de coulée et noyau utilisé dans ce procédé Expired - Lifetime EP1174200B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10035202 2000-07-20
DE10035202A DE10035202A1 (de) 2000-07-20 2000-07-20 Gießverfahren und Gusskern für die Verwendung in diesem Verfahren

Publications (3)

Publication Number Publication Date
EP1174200A2 EP1174200A2 (fr) 2002-01-23
EP1174200A3 EP1174200A3 (fr) 2003-10-01
EP1174200B1 true EP1174200B1 (fr) 2006-06-21

Family

ID=7649521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01117615A Expired - Lifetime EP1174200B1 (fr) 2000-07-20 2001-07-17 Procédé de coulée et noyau utilisé dans ce procédé

Country Status (4)

Country Link
EP (1) EP1174200B1 (fr)
AT (1) ATE330736T1 (fr)
DE (2) DE10035202A1 (fr)
ES (1) ES2266055T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006057786A1 (de) * 2006-12-06 2008-06-12 Almecon Entwicklungs-, Beratungs- Und Beschaffungsgesellschaft Mbh Verfahren zur Herstellung von Formteilen aus Metall mittels einer Pressvorrichtung und Pressvorrichtung zur Durchführung des Verfahrens

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10149244A1 (de) * 2001-10-05 2003-04-24 Daimler Chrysler Ag Tragelement für Fahrzeugkarosserie
DE102006017104A1 (de) 2006-04-10 2007-10-11 Kurtz Gmbh Verfahren zur Herstellung von offenporigen Bauteilen aus Metall, Kunststoff oder Keramik mit geordneter Schaumgitterstruktur
FR2927269B1 (fr) * 2008-02-13 2010-10-29 C T I F Ct Tech Des Ind De La Preforme et procede pour la fabrication d'une piece dont une partie interieure est en mousse metallique
DE102009040934B4 (de) 2009-09-11 2020-06-04 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Kunststoffformteil für ein Kraftfahrzeug

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
JPS5355413A (en) * 1976-10-29 1978-05-19 Miyazakiken Method of manufacturing grainndispersed metallic light compound material having metal layer or metal portion of optional shape on its surface or in its interior
DE3444406A1 (de) * 1984-12-05 1986-06-05 Kolbenschmidt AG, 7107 Neckarsulm Gegossene bauteile fuer brennkraftmaschinen mit eingegossenen bewehrungskoerpern sowie verfahren zur herstellung der verbindung zwischen den bauteilen und den bewehrungskoerpern
FR2592374B1 (fr) * 1985-12-27 1991-08-16 Peugeot Procede de liaison directe ceramique-metal
GB9108297D0 (en) * 1991-04-18 1991-06-05 Gkn Sankey Ltd Reinforced light metal article and method for its production
DE4343945C1 (de) * 1993-12-22 1995-09-14 Austria Metall Verfahren zum Herstellen von Metall-Matrix-Verbundwerkstoffen
GB9414660D0 (en) * 1994-07-20 1994-09-07 Gkn Sankey Ltd An article and method for its production
JP3212245B2 (ja) * 1995-08-30 2001-09-25 マツダ株式会社 鋳造方法及び鋳造装置並びに鋳造品
EP0815989A3 (fr) * 1996-07-06 2000-05-10 SAB WABCO BSI Verkehrstechnik Products GmbH Méthode de production par coulage de disques de frein en alliages lègers localement renforcés par matière céramique
DE19650613B4 (de) * 1996-12-06 2005-12-29 Daimlerchrysler Ag Bauteil mit einem Metallschaum-Kern
DE19653149A1 (de) * 1996-12-19 1998-06-25 Bayerische Motoren Werke Ag Werkstück aus einem Leichtbau-Werkstoff und Verfahren zur Herstellung des Werkstückes
DE19800594A1 (de) * 1998-01-09 1999-07-15 Gut Gieserei Umwelt Technik Gm Verfahren zum Herstellen eines Bauteils mit teilflüssigen Werkstoffen
DE19826848C5 (de) * 1998-06-16 2006-02-23 Borbet Gmbh Leichtmetallrad für Kraftfahrzeuge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006057786A1 (de) * 2006-12-06 2008-06-12 Almecon Entwicklungs-, Beratungs- Und Beschaffungsgesellschaft Mbh Verfahren zur Herstellung von Formteilen aus Metall mittels einer Pressvorrichtung und Pressvorrichtung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
EP1174200A3 (fr) 2003-10-01
ATE330736T1 (de) 2006-07-15
EP1174200A2 (fr) 2002-01-23
ES2266055T3 (es) 2007-03-01
DE10035202A1 (de) 2002-01-31
DE50110214D1 (de) 2006-08-03

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