FR2614814A3 - Method for manufacturing components made from aluminium, various alloys and all alloys in general - Google Patents

Method for manufacturing components made from aluminium, various alloys and all alloys in general Download PDF

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FR2614814A3
FR2614814A3 FR8706527A FR8706527A FR2614814A3 FR 2614814 A3 FR2614814 A3 FR 2614814A3 FR 8706527 A FR8706527 A FR 8706527A FR 8706527 A FR8706527 A FR 8706527A FR 2614814 A3 FR2614814 A3 FR 2614814A3
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blanks
alloys
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aluminum
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
    • B22D31/002—Cleaning, working on castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/002—Hybrid process, e.g. forging following casting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/057—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Forging (AREA)

Abstract

According to the invention, the foundry blanks are subjected, cold or at low temperature, to a supplementary cold-pressing operation, the said blanks being arranged in the die cavities of dimensions which are slightly smaller than those of the moulding.

Description

L'invention vise un procédé pour fabriquer des pièces en aluminium, alliages d'aluminium et tous alliages en général. The invention relates to a method for manufacturing parts made of aluminum, aluminum alloys and all alloys in general.

On connalt de nombreux procédés pour fabriquer de telles pièces, par exemple et non limitativement, par matriçage, for-geage, moulage à la cire, par coulée. Ces procédés présentent tous des inconvénients résultant soit dans l'insuffisance des performances mécaniques obtenues, soit dans la nécessité d'outillages complexes et comateux et pour certains dans la nécessité d'autres traitements. Numerous methods are known for making such parts, for example and without limitation, by stamping, forming, casting, casting. These processes all have drawbacks resulting either in the inadequacy of the mechanical performance obtained, or in the need for complex and comatose tools and for some in the need for other treatments.

Le déposant de la présente demande a proposé une solution originale définie dans le brevet européen 119.365 consistant a associer dans un procédé nouveau une première phase de traitement par coulée d'aluminium ou alliage d'aluminium dans un moule, puis après la coulée, le démoulage de la pièce encore chaude et son insertion dans une matrice difinissant une empreinte a dimension inférieure à celle du moule en exerçant ensuite une opération de pressage. The applicant of the present application has proposed an original solution defined in European Patent 119,365 consisting in associating in a new process a first phase of treatment by casting aluminum or aluminum alloy in a mold, then after casting, demolding the still hot part and its insertion into a matrix difinissant a smaller size footprint than the mold by then exerting a pressing operation.

Ce procédé est appliqué industriellement et les performances mécaniques des pièces obtenues sont très largement supérieures à celles des procédés classiques avec un coût de revient d'élaboration inférieur. This process is applied industrially and the mechanical performance of the parts obtained are much greater than those of conventional processes with a lower production cost.

Dans la mise en oeuvre du procédé décrit par le brevet européen, la pièce démoulée se situe à une température de l'cidre de 40Q C à 500 C. Sa structure métallographique est donc homogène dans toute son épaisseur et l'opération suivante de pressage dans une matrice permet une obtention de caractéristiques mécaniques constante dans toutes les parties ou zones constitutives de la pièce. In the implementation of the method described by the European patent, the demolded part is at a cider temperature of 40 ° C. at 500 ° C. Its metallographic structure is therefore homogeneous throughout its thickness and the following pressing operation in a matrix makes it possible to obtain constant mechanical characteristics in all the constituent parts or zones of the part.

Des tentatives et essais ont été e++etués par le déposant pour essayer de développer le procédé objet du brevet européen précité. Ces essais ont été réalisés à partir de pièces d'ébauches de fonderie à froid ou a basse température présentant une structure métallographique déterminée et faisant apparaître une croate extérieure. Dans ce cas, ladite structure est hétérogène avec des variations importantes de la structure des grains de la zone extrme de la pièce à son coeur. Attempts and tests have been e ++ made by the applicant to try to develop the process object of the aforementioned European patent. These tests were carried out from pieces of cold or low temperature foundry blanks having a determined metallographic structure and showing an outer Croatian. In this case, said structure is heterogeneous with significant variations in the grain structure of the extreme zone of the coin at its heart.

Compte-tenu de cette structure, les pièces ainsi réalisées présentant déjà des caractéristiques mécaniques propres à l'opération de fonderie subissaient les opérations classiques et finales d'ébarbage. Given this structure, the parts thus produced already having the mechanical characteristics of the foundry operation were subjected to conventional and final deburring operations.

L'originalité du procédé selon l'invention, vise a avoir fait subir aux ébauches de fonderie soit à froid, soit à basse température, une opération supplémentaire de pressage. Les ébauches refroidies ou à basse température sont placées dans les empreintes de matrice de dimensions légèrement inférieures à celles du moulage. Les parties de matrice sont sollicitées et déplacées pour entre fortement presses les unes contre les autres afin d'exercer sur les ébauches coulées de part et d'autre desquelles elles se trouvent, un effet combiné de pressage. The originality of the process according to the invention is intended to have subjected to the foundry blanks either cold or at low temperature, an additional pressing operation. The cooled or low-temperature blanks are placed in die impressions of dimensions slightly smaller than those of the molding. The die portions are urged and moved to strongly press against each other to exert on the blanks cast on either side of which they are, a combined pressing effect.

Les résultats constatés sont particulièrement surprenants compte-tenu de la structure métallPgraphique initiale avec une croute d'épaisseur. Les caractéristiques mécaniques sont renforcées et supérieures à celles obtenues par le procédé décrit dans le brevet européen. The results observed are particularly surprising considering the initial metallographic structure with a thick crust. The mechanical characteristics are reinforced and superior to those obtained by the process described in the European patent.

Rfin d'établir des comparaisons possibles, nous avons volontairement repris les mimes conditions d'essais décrits dans ledit brevet, exposées de manière non limitative, dans la mise en oeuvre du procédé selon l'invention. In order to establish possible comparisons, we have voluntarily adopted the same test conditions described in said patent, exposed in a non-limiting manner, in the implementation of the method according to the invention.

EXEMPLE N 1
On traite un alliage d'aluminium au cuivre, du type connu sous la dénomination commerciale fiU5GTY34.

Figure img00030001
EXAMPLE N 1
An aluminum alloy is treated with copper of the type known under the trade name fiU5GTY34.
Figure img00030001

<tb> <SEP> PRESSAGE <SEP> A <SEP> HAUTE <SEP> TEM- <SEP> PRESSAGE <SEP> A <SEP> BASSE <SEP> TE
<tb> <SEP> AU5GTY34 <SEP> MOULAGE <SEP> TRADITIONNEL <SEP> PERATURE <SEP> OU <SEP> A <SEP> CHAUD <SEP> PERATURE <SEP> OU <SEP> A <SEP> FROID
<tb> <SEP> (Br.EUR. <SEP> 119365) <SEP> (PRESENTE <SEP> DEMANDE <SEP> DE
<tb> <SEP> BREVET) <SEP>
<tb> ALLONGEMENT <SEP> % <SEP> 8 <SEP> à <SEP> 11 <SEP> 16 <SEP> à <SEP> 20 <SEP> 16 <SEP> à <SEP> 22
<tb> RESISTANCE <SEP> A <SEP> LA <SEP> 340 <SEP> à <SEP> 360 <SEP> 400 <SEP> à <SEP> 450 <SEP> 400 <SEP> à <SEP> 460
<tb> TRACTION <SEP> Rt <SEP> (MPa)
<tb> TENUE <SEP> A <SEP> LA <SEP> FATIGUE <SEP> s <SEP> 8 <SEP> cyc
<tb> contrainte <SEP> 120 <SEP> MPa <SEP> 1.000.000. <SEP> cycles <SEP> pas <SEP> de <SEP> rupture <SEP> à <SEP> 10 <SEP> cycles <SEP> pas <SEP> de <SEP> rupture <SEP> a <SEP> 10
<tb> Contrainte <SEP> 180 <SEP> MPa <SEP> 280.000. <SEP> cycles <SEP> 2.000.000. <SEP> cycles <SEP> 2.500.000 <SEP> cycles <SEP>
<tb> <tb><SEP> PRESSING <SEP> A <SEP> HIGH <SEP> TEM- <SEP> PRESSING <SEP> A <SEP> LOW <SE> TE
<tb><SEP> AU5GTY34 <SEP> MOLDING <SEP> TRADITIONAL <SEP> PERATURE <SEP> OR <SEP> A <SEP> HOT <SEP> PERATURE <SEP> OR <SEP> A <SEP> COLD
<tb><SEP> (Br.EUR. <SEP> 119365) <SEP> (PRESENT <SEP> REQUEST <SEP> FROM
<tb><SEP> PATENT) <SEP>
<tb> ELONGATION <SEP>% <SEP> 8 <SEP> to <SEP> 11 <SEP> 16 <SEP> to <SEP> 20 <SEP> 16 <SEP> to <SEP> 22
<tb> RESISTANCE <SEP> A <SEP><SEP> 340 <SEP> to <SEP> 360 <SEP> 400 <SEP> to <SEP> 450 <SEP> 400 <SEP> to <SEP> 460
<tb> TRACTION <SEP> Rt <SEP> (MPa)
<tb> TENUE <SEP> A <SEP> THE <SEVEN> FATIGUE <SEP> s <SEP> 8 <SEP> Cyc
<tb> constraint <SEP> 120 <SEP> MPa <SEP> 1,000,000. <SEP> cycles <SEP> not <SEP> from <SEP> rupture <SEP> to <SEP> 10 <SEP> cycles <SEP> not <SEP> from <SEP> rupture <SEP> a <SEP> 10
<tb> Constraint <SEP> 180 <SEP> MPa <SEP> 280,000. <SEP> cycles <SEP> 2,000,000. <SEP> cycles <SEP> 2,500,000 <SEP> cycles <SEP>
<Tb>

EXEMPLE N 2 :
On traite un alliage d'aluminium au silicium du type connu sous la dénomination commerciale AS7GO6Y33.

Figure img00030002
EXAMPLE N 2
A silicon aluminum alloy of the type known under the trade name AS7GO6Y33 is processed.
Figure img00030002

<tb><Tb>

<SEP> PRESSAGE <SEP> A <SEP> HAUTE <SEP> TEM- <SEP> PRESSAGE <SEP> A <SEP> BASSE <SEP> TEM
<tb> <SEP> AS7G06Y33 <SEP> <SEP> MOULAGE <SEP> TRADITIONNEL <SEP> PERATURE <SEP> OU <SEP> A <SEP> CHAUD <SEP> PERATURE <SEP> OU <SEP> A <SEP> FROID <SEP>
<tb> <SEP> (Br.EUR.<SEP> 119365) <SEP> (PRESENTE <SEP> DEMANDE <SEP> DE
<tb> <SEP> BREVET)
<tb> ALLONGEMENT <SEP> % <SEP> <SEP> 4 <SEP> à <SEP> 6 <SEP> 9 <SEP> à <SEP> 14 <SEP> 9 <SEP> à <SEP> 15
<tb> RESISTANCE <SEP> A <SEP> LA <SEP> 290 <SEP> à <SEP> 320 <SEP> <SEP> 320 <SEP> à <SEP> 360 <SEP> 320 <SEP> à <SEP> 370
<tb> TRACTION <SEP> Rt <SEP> (MPa) <SEP>
<tb> TENUE <SEP> A <SEP> LA <SEP> FATIGUE
<tb> contrainte <SEP> 120 <SEP> MPa <SEP> 475.000 <SEP> cycles <SEP> 20.000.0Q <SEP> cycles <SEP> 23 <SEP> 000 <SEP> 000 <SEP> cycle
<tb>
Les exemples sont donnés à titre nullement limitatif.<SEP> PRESSING <SEP> A <SEP> HIGH <SEP> TEM- <SEP> PRESSING <SEP> A <SEP> LOW <SEP> TEM
<tb><SEP> AS7G06Y33 <SEP><SEP> MOLDING <SEP> TRADITIONAL <SEP> PERATURE <SEP> OR <SEP> A <SEP> HOT <SEP> PERATURE <SEP> OR <SEP> A <SEP> COLD <September>
<tb><SEP> (Br.EUR. <SEP> 119365) <SEP> (PRESENT <SEP> REQUEST <SEP> FROM
<tb><SEP> PATENT)
<tb> ELONGATION <SEP>% <SEP><SEP> 4 <SEP> to <SEP> 6 <SEP> 9 <SEP> to <SEP> 14 <SEP> 9 <SEP> to <SEP> 15
<tb> RESISTANCE <SEP> A <SEP><SEP> 290 <SEP> to <SEP> 320 <SEP><SEP> 320 <SEP> to <SEP> 360 <SEP> 320 <SEP> to <SEP> 370
<tb> TRACTION <SEP> Rt <SEP> (MPa) <SEP>
<tb> TENUE <SEP> A <SEP> THE <SEVEN> FATIGUE
<tb> constraint <SEP> 120 <SEP> MPa <SEP> 475,000 <SEP> cycles <SEP> 20.000.0Q <SEP> cycles <SEP> 23 <SEP> 000 <SEP> 000 <SEP> cycle
<Tb>
The examples are given by way of no limitation.

Le procédé selon l'invention vise ainsi à une opération de pressage à froid ou a basse température des pièces ou ébauches de fonderie en provenance de tous moulages telles que coquille, basse pression, sable, sous pression et autres. The method according to the invention thus aims at a cold pressing operation or low temperature foundry parts or blanks from all moldings such as shell, low pressure, sand, pressure and others.

Le procédé vise toutes pièces ou ébauches de fonderie en aluminium, tous alliages d'aluminium, bronze d'aluminium, alliages légers ferreux ou non, alliages composites ou matériaux com > nsites.  The process is intended for all aluminum casting parts or blanks, all aluminum alloys, aluminum bronze, light alloys of ferrous or non-ferrous alloy, composite alloys or composite materials.

La température des ébauches est celle de la température dite à froid ou å basse température au moment du pressage entre les parties de la matrice. The temperature of the blanks is that of the so-called cold temperature or low temperature at the time of pressing between the parts of the die.

Pour la mise en oeuvre du. procédé objet de l'inventions il a été effectué des essais c, sur les matrices susceptibles d'assurer une tenue lors de l'opération de pressage. Les matrices ont ainsi une dureté de 46 à 48 HRC et les nuances des aciers sont très particulières. For the implementation of the. The subject of the invention has been carried out tests c, on the matrices likely to ensure a holding during the pressing operation. The dies thus have a hardness of 46 to 48 HRC and the grades of the steels are very particular.

Plus spécifiquement, les matrices de pressage sont montées sur presses hydrauliques ou à vis, ou excentriques, qui donnent aux banches soit une percussion, soit une pression. More specifically, the pressing dies are mounted on hydraulic or screw presses, or eccentric, which give the banches either a percussion or a pressure.

Les avantages ressortent bien de la description. The advantages are apparent from the description.

Les ébauches sont considérablement améliorées par ltopbration de pressage. Le procédé permet de travailler et de réaliser des pièces dont la structure métallographique est hétérogène en renforçant les caractéristiques mécaniques. Le choix de ce procédé par l'utilisateur par rapport a celui décrit dans le brevet européen 119.365 sera fonction de la pièce traitée et en particulier des qualités requises au coeur de celle-ci.  The blanks are considerably improved by pressing ltopbration. The method makes it possible to work and to produce parts whose metallographic structure is heterogeneous by reinforcing the mechanical characteristics. The choice of this method by the user compared to that described in European Patent 119.365 will be a function of the treated part and in particular the qualities required at the heart thereof.

Claims (2)

REVENDICRTIONSREVENDICRTIONS - 1 - Procédé pour fabriquer des pièces élaborées en fonderie, caractérisé en ce que les ébauches de fonderie sont soumises à froid ou a basse température à une opération supplémentaire de pressage, lesdites ébauches étant disposées dans les empreintes de matrice de dimensions légèrement inférieures à celle du moulage.- 1 - Process for manufacturing parts made in the foundry, characterized in that the blanks of the foundry are subjected to cold or low temperature to an additional pressing operation, said blanks being arranged in the die impressions of dimensions slightly smaller than that molding. - 2 - Procédé selon la revendication 1, caractérisé en ce que les ébauches de fonderie sont en provenance de tc= moulages tels que coquille, basse pression, sable, sous pression.- 2 - A method according to claim 1, characterized in that the foundry blanks are from tc = casts such as shell, low pressure, sand, under pressure. - s - ProcédE selon la revendication 1, caractérisé en ce que les ébauches de fonderie sont réalisées en aluminium, tous alliages d'aluminium, bronze d'aluminium. - s - Process according to claim 1, characterized in that the casting blanks are made of aluminum, all aluminum alloys, aluminum bronze. - 4 - Procédé selon la revendication 1, caractérisé en ce que les ébauches de fonderie sont réalisées à partir d'alliages légers, ferreux ou non.- 4 - Process according to claim 1, characterized in that the foundry blanks are made from light alloys, ferrous or non-ferrous. - 5 - Procédé selon la revendication i, caractérisé en ce que les ébauches de fonderie sont réalisées a partir d'alliages composites ou matériaux composites.- 5 - Process according to claim i, characterized in that the foundry blanks are made from composite alloys or composite materials. - 6 - Procédé selon la revendication 1, caractérisé en ce que la température des ébauches est celle de la température dite à froid ou a basse pression au moment du pressage entre les parties de la matrice.- 6 - Process according to claim 1, characterized in that the temperature of the blanks is that of the so-called cold temperature or low pressure at the time of pressing between the parts of the matrix. - 7 - Procédé selon la revendication 1. caractérisé en ce que l'on choisit une dureté des matrices réceptionnant les ébauches de fonderie avec une dureté de 46 à 48 HRC. - 7 - A method according to claim 1. characterized in that one chooses a hardness of the matrices receiving the foundry blanks with a hardness of 46 to 48 HRC.
FR8706527A 1987-05-04 1987-05-04 PROCESS FOR MANUFACTURING ALUMINUM PARTS, VARIOUS ALLOYS AND ALL ALLOYS IN GENERAL Expired FR2614814B3 (en)

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WO1999029454A1 (en) * 1997-12-09 1999-06-17 Vitromatic Comercial, S.A. De C.V. Process for fabricating aluminium valves for burners of domestic gas heaters
FR2778125A1 (en) * 1998-05-04 1999-11-05 Serio Emile Di PROCESS FOR MANUFACTURING PARTS IN CAST ALLOYS, PARTICULARLY IN ALUMINUM
US6021663A (en) * 1996-09-20 2000-02-08 Leybold Vakuum Gmbh Process and leak detector for inspecting a plurality of similar test bodies for leaks
FR2803232A1 (en) * 1999-12-29 2001-07-06 Serio Emile Di IMPROVED PROCESS FOR MANUFACTURING LIGHT ALLOY PARTS
FR2816858A1 (en) * 2000-11-17 2002-05-24 Process Conception Ing Sa Fabrication of cast metal alloy components incorporating a rapid cooling stage prior to final pressing to optimise mechanical properties
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FR2864459A1 (en) * 2003-12-24 2005-07-01 Peugeot Citroen Automobiles Sa Fabrication of light alloy components by casting with cooling prior to a pressing operation, to produce a product without burrs
US7121318B2 (en) 2002-09-20 2006-10-17 Alotech Ltd. Llc Lost pattern mold removal casting method and apparatus
US7147031B2 (en) 2002-09-20 2006-12-12 Alotech Ltd. Llc Lost pattern mold removal casting method and apparatus
US7165600B2 (en) 2002-09-11 2007-01-23 Alotech Ltd. Llc Chemically bonded aggregate mold
US7216691B2 (en) 2002-07-09 2007-05-15 Alotech Ltd. Llc Mold-removal casting method and apparatus
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Cited By (18)

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