EP0457257B1 - Procédé pour influencer la structure de la zone marginale d'un alliage durant sa solidificaction dans un moule à sable et utilisation de ce procédé - Google Patents

Procédé pour influencer la structure de la zone marginale d'un alliage durant sa solidificaction dans un moule à sable et utilisation de ce procédé Download PDF

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Publication number
EP0457257B1
EP0457257B1 EP91107754A EP91107754A EP0457257B1 EP 0457257 B1 EP0457257 B1 EP 0457257B1 EP 91107754 A EP91107754 A EP 91107754A EP 91107754 A EP91107754 A EP 91107754A EP 0457257 B1 EP0457257 B1 EP 0457257B1
Authority
EP
European Patent Office
Prior art keywords
sand mould
influencing
process according
solution
marginal zone
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
EP91107754A
Other languages
German (de)
English (en)
Other versions
EP0457257A2 (fr
EP0457257A3 (en
Inventor
Werner Menk
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.)
Georg Fischer AG
Original Assignee
Georg Fischer AG
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 Georg Fischer AG filed Critical Georg Fischer AG
Publication of EP0457257A2 publication Critical patent/EP0457257A2/fr
Publication of EP0457257A3 publication Critical patent/EP0457257A3/de
Application granted granted Critical
Publication of EP0457257B1 publication Critical patent/EP0457257B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns

Definitions

  • the present invention relates to a method for influencing the structure of an edge zone formed in the solidification of a molten metal alloy in a sand mold, and to the use of the method.
  • the melting point of the entire amount of liquid is reduced.
  • the crystallization is influenced in such a way that it takes place over the entire volume at a lower temperature.
  • the object of the invention is to propose a method by means of which it is possible to partially influence a predetermined volume of a molten metal, in particular its edge zone.
  • FIG. 1 shows the test arrangement in which an intermediate wall 1 separates the stearic acid into two areas. The partition is soaked in antimony salt. The area of influence 2 of the solution can be clearly seen.
  • Numeral 3 denotes the crystallized stearic acid.
  • the surface of a container in the form of a sand mold was sprayed with an aqueous solution of an antimony compound and then brought into contact with the surface of a liquid metal.
  • the active ingredient diffusing into the liquid influenced the crystallization in such a way that an edge zone with changed properties was created.
  • the carbon diffusion was hindered, with the result that part of the carbon contained in the liquid metal was not excreted in the form of graphite but as cementite (Fe3C). This led to increased wear resistance in the crystallized zone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Casting Devices For Molds (AREA)
  • Chemically Coating (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Claims (5)

  1. Procédé pour influer sur la structure d'une zone marginale formée dans un moule en sable lors de la solidification d'un alliage métallique en fusion, caractérisé en ce qu'on applique, sur l'étendue de la surface de contact du moule en sable avec l'alliage métallique en fusion, une solution aqueuse d'un composé d'antimoine.
  2. Procédé selon la revendication 1, caractérisé en ce qu'on pulvérise ou on applique par enduction ou par immersion la solution sur la surface du moule en sable.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'on ajoute, à la solution, des substances augmentant la viscosité.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'on ajoute, à la solution, des liants céramiques ou à base de silicates.
  5. Utilisation du procédé selon l'une des revendications 1 à 4 pour fabriquer des composants métalliques soumis à une usure, par exemple pour la construction automobile.
EP91107754A 1990-05-17 1991-05-14 Procédé pour influencer la structure de la zone marginale d'un alliage durant sa solidificaction dans un moule à sable et utilisation de ce procédé Expired - Lifetime EP0457257B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1676/90A CH679986A5 (fr) 1990-05-17 1990-05-17
CH1676/90 1990-05-17

Publications (3)

Publication Number Publication Date
EP0457257A2 EP0457257A2 (fr) 1991-11-21
EP0457257A3 EP0457257A3 (en) 1992-02-26
EP0457257B1 true EP0457257B1 (fr) 1996-09-04

Family

ID=4215994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107754A Expired - Lifetime EP0457257B1 (fr) 1990-05-17 1991-05-14 Procédé pour influencer la structure de la zone marginale d'un alliage durant sa solidificaction dans un moule à sable et utilisation de ce procédé

Country Status (5)

Country Link
EP (1) EP0457257B1 (fr)
AT (1) ATE142134T1 (fr)
AU (1) AU646863B2 (fr)
CH (1) CH679986A5 (fr)
DE (1) DE59108129D1 (fr)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113360A (en) * 1961-04-14 1963-12-10 Amsted Ind Inc Mold wash

Also Published As

Publication number Publication date
CH679986A5 (fr) 1992-05-29
AU7709891A (en) 1991-11-21
ATE142134T1 (de) 1996-09-15
EP0457257A2 (fr) 1991-11-21
DE59108129D1 (de) 1996-10-10
AU646863B2 (en) 1994-03-10
EP0457257A3 (en) 1992-02-26

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