EP2823916B1 - Procédé de fabrication d'une pièce moulée composite - Google Patents

Procédé de fabrication d'une pièce moulée composite Download PDF

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Publication number
EP2823916B1
EP2823916B1 EP13175828.6A EP13175828A EP2823916B1 EP 2823916 B1 EP2823916 B1 EP 2823916B1 EP 13175828 A EP13175828 A EP 13175828A EP 2823916 B1 EP2823916 B1 EP 2823916B1
Authority
EP
European Patent Office
Prior art keywords
producing
casting
insert
composite cast
exothermic
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.)
Active
Application number
EP13175828.6A
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German (de)
English (en)
Other versions
EP2823916A1 (fr
Inventor
Sabine Tunzini
Thomas Baginski
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.)
GF Casting Solutions Herzogenburg Iron GmbH
GF Casting Solutions Kunshan Co Ltd
GF Casting Solutions Leipzig GmbH
Fondium Mettmann GmbH
Fondium Singen GmbH
Original Assignee
GF Casting Solutions Herzogenburg Iron GmbH
GF Casting Solutions Kunshan Co Ltd
GF Casting Solutions Leipzig GmbH
GF Casting Solutions Singen GmbH
GF Casting Solutions Mettmann 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 GF Casting Solutions Herzogenburg Iron GmbH, GF Casting Solutions Kunshan Co Ltd, GF Casting Solutions Leipzig GmbH, GF Casting Solutions Singen GmbH, GF Casting Solutions Mettmann GmbH filed Critical GF Casting Solutions Herzogenburg Iron GmbH
Priority to EP13175828.6A priority Critical patent/EP2823916B1/fr
Publication of EP2823916A1 publication Critical patent/EP2823916A1/fr
Application granted granted Critical
Publication of EP2823916B1 publication Critical patent/EP2823916B1/fr
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Classifications

    • 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
    • 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
    • B22D19/04—Casting in, on, or around objects which form part of the product for joining parts

Definitions

  • the invention relates to a method for producing a composite casting comprising an insert part and casting material, wherein the insert part is connected in a material-locking manner to the cast material according to the preamble of claim 1.
  • the DE 10 2006 041 901 A1 discloses a method for producing metal composite parts from steel and / or cast iron.
  • the einzug manende part which is made of steel or cast iron, coated by flux.
  • the coating aims at a reduction, that is to say that during the pouring, the oxide skin of the casting is dissolved and washed away, as a result of which the casting material can undergo a metallurgical bond.
  • the DE 10 2011 053 858 B3 discloses a method of using a pourable component in a lost mold, wherein a coating agent is applied to a surface of the inflowing component.
  • the coating agent forms a separation-active surface, which prevents adhesion of the material to the component as well as corrosion before casting with casting material.
  • the DE 100 43 105 B4 discloses a method of forming a tough, resilient and / or at least substantially defect free bond between an insert and a cast metal material having a melting point below that of the feedstock.
  • the insert is coated with a thin layer of a metallic material derived from the group of silver, antimony, bismuth, chromium, gold, lead, magnesium, silicon, tin, titanium and zinc. This is followed by casting of the casting material against the coated surface of the insert.
  • the thermal expansion coefficient of the coating is greater than that of the insert and less than that of the casting material.
  • the coated insert is also maintained at a temperature of at least 100 ° C for a period of at least 5 minutes.
  • the EP 0 659 899 A1 finally also discloses a method for producing a composite casting with all the technical features of the preamble of claim 1.
  • Object of the present invention is to provide a method and a corresponding composite casting, which achieved over the prior art, an improved bond between an insert and casting material, and ensures economic production.
  • the sheathing or embedding of the insert is formed by an exothermic material which ignites by contacting with the inflowing casting material or by reaching the ignition temperature whereby the temperature gradient between solidifying melt and the insert is reduced after casting and demolding, the exothermic material is removed, the surface (s) of the insert covered by the exothermic material being / are free of casting material.
  • This energy is released and released to the environment, resulting in a reduced temperature gradient between the solidifying melt and the insert.
  • Exothermic materials are used in addition to the use in welding (Thermitsch Stammsgemische) in exothermic feeders in the foundry. Upon contact of the melt with the exothermic mass, a combustion reaction is triggered, which ensures in the feeder that there is the last solidifying melt and so that the changing volume during solidification in the casting can be compensated.
  • Such materials are known in the art, which EP 1 050 354 A1 .
  • EP 0 888 199 B1 and DE 196 42 838 A1 reveal such.
  • such a known material causing an exothermic reaction is used as a sheath for the inflowing insert.
  • the material ignites.
  • the insert is heated from both sides, which prevents rapid solidification of the casting material in the border region to the insert, since the insert loses its quenching effect for the casting material.
  • the temperature gradient between casting material and insert is minimized. This, in turn, promotes carbon diffusion between the casting material and the insert, whereby a cohesive or metallurgical bond can be produced.
  • the insert is preferably made of steel, copper, bronze, brass, aluminum or an aluminum alloy.
  • the process or the composite casting is versatile due to the wide choice of materials.
  • the exothermic material preferably has an easily oxidizable metal, in particular aluminum and / or magnesium.
  • the exothermic material has an oxidizing agent for the readily oxidizable metal, in particular iron (III) oxide.
  • the backfill material used is preferably an oxide, in particular SiO 2 .
  • the backfill material serves as a filling material, which is mixed with the other substances such as aluminum and / or magnesium and an oxidizing agent.
  • the exothermic material preferably comprises a binder which serves the cohesion of the exothermic material.
  • the preferred binder is an alkali silicate in use.
  • a preferred embodiment is that a cast iron is used as the casting material, preferably GJS, GJL and / or GJV.
  • a cast iron is used as the casting material, preferably GJS, GJL and / or GJV.
  • a high strength and elongation at break can be achieved at designated locations in the cast component, or additional, positive properties for a subsequent further treatment can be given to the composite cast component.
  • an aluminum alloy is used as the casting material, thereby, for example, aluminum components can be combined with various metallic materials, whereby the advantage of the weight reduction can be used by the light aluminum.
  • the inventive method is used with lost molds.
  • a hollow body is used as an insert.
  • the cavity fills with the casting material and connects cohesively with the insert.
  • the outer surface of the insert is coated with the exothermic material or embedded in the material. Due to the exothermic reaction of the mass after contact with the melt, the mass also gives off heat to the insert, resulting in a unified temperature gradient between the solidifying melt and the insert.
  • the insert can also be unilaterally, or in hollow execution from the inside with the exothermic material in combination.
  • the exothermic material can be easily removed and the outer surface or inner surface of the insert emerges.
  • Post-processing is then possible, but in some cases not necessary because the dimensional accuracy and the surface finish are already of good quality.
  • the inventive method is economically highly interesting. Furthermore, these methods provide extended possibilities to after-treat the cast component, such as e.g. Welding or heat treatment (even partially on the insert).
  • Such composite castings produced by the method according to the invention are particularly suitable for general mechanical engineering, construction machinery and vehicle construction. It can thereby different materials economically combined with each other and the preferred properties of the individual materials are combined with each other, without the problem of insufficient connection of the materials by early solidification of the casting material occurs.
  • Fig. 1 shows a partial section of a mold in which a composite casting 1 was shed.
  • the casting material 2 flows into the casting mold formed by the molding material 5 in which an insert 3 is inserted in order to form a cohesive or metallurgical bond with the casting material 2.
  • the casting material 2 preferably GJS, GJL or GJV, flows into the casting mold formed by the molding material 5.
  • the exothermic material 4 At the points where the casting material 2 touches the exothermic material 4, this ignites, whereby heat is released to the environment.
  • the insert is thereby heated and the temperature gradient between the solidifying melt and the insert is reduced.
  • the carbon diffusion between casting material 2, which directly touches the insert 3, and the insert 3 is driven forward.
  • a cohesive or metallurgical connection at the direct contact points between insert 3 and casting material 2 is achieved.
  • the exothermic material 4 can be easily removed from the insert 3.
  • the area covered by the exothermic material 4 / n of the insert 3 is free of casting material, thus a reworking of the surface of the insert is not necessarily necessary, which in turn makes the inventive method economically very interesting.
  • FIG. 2-4 Another embodiment is by the Fig. 2-4 demonstrated.
  • a cylindrical steel tube made of a high-carbon steel with wall thicknesses of 5 mm is used and molded into exothermic material 4 with a defined wall thickness.
  • This steel pipe 3 with surrounding exothermic material 4 is inserted into the mold 5 to be cast as from Fig. 2 seen.
  • the closed mold 5 is filled with melt 2 for producing a GJS, wherein the interior of the steel pipe 3 is flowed through by melt 2 and a Part of the exothermic material has 4 direct melt contact. After the ignition temperature of the exothermic material 4 is reached, this gives off heat to the environment and the steel pipe 3. This is greatly heated and the temperature gradient between the steel pipe 3 and solidifying melt 2 is reduced.

Claims (12)

  1. Procédé de fabrication d'une pièce coulée composite (1), contenant un insert (3) et un matériau de coulée (2), l'insert (3) étant relié par accouplement de matière avec le matériau de coulée (2) et le procédé comprenant les étapes suivantes :
    la fabrication de l'insert (3),
    l'habillage ou l'enrobage de l'insert,
    l'insertion de l'insert habillé/enrobé dans le moule pour la coulée,
    le remplissage du moule avec une masse fondue,
    caractérisé en ce que l'habillage/l'enrobage de l'insert est formé par un matériau exothermique (4) qui s'allume au contact avec le matériau de coulée affluent ou lorsque la température d'allumage de la masse exothermique est atteinte, le gradient de température entre la masse fondue qui se solidifie et l'insert (3) étant ainsi réduit, le matériau exothermique (4) étant éliminé après la coulée et le démoulage, la ou les surfaces de l'insert recouvertes par le matériau exothermique (4) étant exemptes du matériau de coulée (2).
  2. Procédé de fabrication d'une pièce coulée composite (1) selon la revendication 1, caractérisé en ce que l'insert (3) est constitué par de l'acier, du cuivre, du bronze, du laiton, de l'aluminium ou un alliage d'aluminium.
  3. Procédé de fabrication d'une pièce coulée composite (1) selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le matériau exothermique (4) comprend un métal facilement oxydable, notamment l'aluminium et/ou le magnésium.
  4. Procédé de fabrication d'une pièce coulée composite (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau exothermique (4) comprend un oxydant pour le métal facilement oxydable, notamment l'oxyde de fer (III).
  5. Procédé de fabrication d'une pièce coulée composite (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau exothermique (4) comprend un matériau de garnissage, de préférence un oxyde.
  6. Procédé de fabrication d'une pièce coulée composite (1) selon la revendication 5, caractérisé en ce que l'oxyde est de préférence SiO2.
  7. Procédé de fabrication d'une pièce coulée composite (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau exothermique (4) comprend un liant, de préférence un silicate alcalin.
  8. Procédé de fabrication d'une pièce coulée composite (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau de coulée (2) est une fonte, notamment GJS, GJL et/ou GJV.
  9. Procédé de fabrication d'une pièce coulée composite (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau de coulée (2) est un alliage d'aluminium.
  10. Procédé de fabrication d'une pièce coulée composite (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le moule pour la coulée (5) est un moule pour la coulée perdu.
  11. Procédé de fabrication d'une pièce coulée composite (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce coulée composite (1) peut être soumise au moins au niveau de l'insert (3) à un traitement thermique ou à un procédé de soudage.
  12. Procédé de fabrication d'une pièce coulée composite (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'insert (3) est un corps creux ou une pièce de forme libre.
EP13175828.6A 2013-07-10 2013-07-10 Procédé de fabrication d'une pièce moulée composite Active EP2823916B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13175828.6A EP2823916B1 (fr) 2013-07-10 2013-07-10 Procédé de fabrication d'une pièce moulée composite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13175828.6A EP2823916B1 (fr) 2013-07-10 2013-07-10 Procédé de fabrication d'une pièce moulée composite

Publications (2)

Publication Number Publication Date
EP2823916A1 EP2823916A1 (fr) 2015-01-14
EP2823916B1 true EP2823916B1 (fr) 2018-12-26

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016104351B4 (de) 2016-03-10 2018-08-23 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Aus Gusseisen bestehender Bremssattel einer Scheibenbremse sowie Verfahren zur Herstellung eines Bremssattels
CN108262466A (zh) * 2017-12-13 2018-07-10 浙江灿根智能科技有限公司 一种双金属铸造工艺
CN114029450A (zh) * 2021-11-10 2022-02-11 北京星航机电装备有限公司 一种轻合金铸造内嵌管路组件及其制备方法和带内嵌管路的轻合金件的铸造方法

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Publication number Priority date Publication date Assignee Title
US3433282A (en) * 1965-12-14 1969-03-18 Us Army Method for eliminating hot tear cracks in castings
JPS57187159A (en) * 1981-05-13 1982-11-17 Mitsubishi Heavy Ind Ltd Formation of surface coating layer
JPS5953641A (ja) * 1982-09-20 1984-03-28 Toyota Motor Corp 発熱反応を利用した複合材料の製造方法
JPS60174244A (ja) * 1984-02-21 1985-09-07 Mitsubishi Heavy Ind Ltd 複合鋳物の製造法
US5429173A (en) * 1993-12-20 1995-07-04 General Motors Corporation Metallurgical bonding of metals and/or ceramics
BR9601454C1 (pt) 1996-03-25 2000-01-18 Paulo Roberto Menon Processo para produção de luvas exotérmicas e isolantes.
DE19642838A1 (de) 1996-10-17 1997-07-31 Daimler Benz Ag Speiser für ein metallisches Gußwerkstück
DE19650056A1 (de) * 1996-12-03 1998-06-04 Thyssen Guss Ag Verfahren zur Herstellung einer Bremsscheibe, insbesondere als Achs- oder Radbremsscheibe für Schienenfahrzeuge
DE19920570B4 (de) 1999-05-04 2008-01-10 Chemex Gmbh Formbare exotherme Zusammensetzungen und Speiser daraus
DE19920802A1 (de) * 1999-05-06 2000-11-09 Ks Aluminium Technologie Ag Giessverfahren unter Verwendung eines Precursorkörpers
US6484790B1 (en) 1999-08-31 2002-11-26 Cummins Inc. Metallurgical bonding of coated inserts within metal castings
DE102006041901A1 (de) 2006-09-07 2008-03-27 Daimler Ag Eingussverfahren zur Herstellung von metallischen Verbundbauteilen
DE102007059771A1 (de) * 2007-12-12 2009-06-18 Daimler Ag Eingussteile mit Konditionierungsschicht zum Eingießen in Leichtmetalle
DE102011053858B3 (de) 2011-09-22 2013-03-14 Preiss Metallwaren Gmbh & Co. Kg Verfahren zur Anwendung eines eingießbaren Bauteils

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