EP0933441B1 - Procédé pour la fabrication d'un pièce coulée sous pression en alliage d'aluminium - Google Patents

Procédé pour la fabrication d'un pièce coulée sous pression en alliage d'aluminium Download PDF

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Publication number
EP0933441B1
EP0933441B1 EP98810062A EP98810062A EP0933441B1 EP 0933441 B1 EP0933441 B1 EP 0933441B1 EP 98810062 A EP98810062 A EP 98810062A EP 98810062 A EP98810062 A EP 98810062A EP 0933441 B1 EP0933441 B1 EP 0933441B1
Authority
EP
European Patent Office
Prior art keywords
component
weight
aluminium alloy
annealing
hardening
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
EP98810062A
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German (de)
English (en)
Other versions
EP0933441A1 (fr
Inventor
Reinhard Winkler
Günther Höllrigl
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.)
3A Composites International AG
Original Assignee
Alcan Technology and Management Ltd
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
Priority to PT98810062T priority Critical patent/PT933441E/pt
Application filed by Alcan Technology and Management Ltd filed Critical Alcan Technology and Management Ltd
Priority to DK98810062T priority patent/DK0933441T3/da
Priority to DE59805967T priority patent/DE59805967D1/de
Priority to AT98810062T priority patent/ATE226263T1/de
Priority to SI9830301T priority patent/SI0933441T1/xx
Priority to ES98810062T priority patent/ES2181152T3/es
Priority to EP98810062A priority patent/EP0933441B1/fr
Priority to BR9900621-9A priority patent/BR9900621A/pt
Publication of EP0933441A1 publication Critical patent/EP0933441A1/fr
Application granted granted Critical
Publication of EP0933441B1 publication Critical patent/EP0933441B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C22F1/043—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 silicon as the next major constituent
    • 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
    • C22F1/05—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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions

Definitions

  • the invention relates to a method for producing a component from an aluminum alloy hardenable by precipitation of Mg 2 Si with Si and / or Mg 2 Si eutectic by die casting.
  • Crash behavior is an increasingly important aspect in vehicle construction. This applies to road traffic as well as for rail traffic.
  • the die casting process enables high-volume production of thin-walled castings, such as those used as crash-relevant components in automotive engineering.
  • Thin-walled parts place high demands on the castability.
  • Aluminum alloys that can meet the requirements placed on the flow behavior or mold filling capacity are alloys with a Si and / or Mg 2 Si eutectic.
  • FR-A-2 323 771 discloses a heat treatment process for a Aluminum alloy with silicon and magnesium as essential Alloy components.
  • the heat treatment process includes, among other things an annealing between 300 and 340 ° C for 4 to 8 h.
  • the object of the invention is therefore to find a heat treatment with which can achieve a high elongation at break with a sufficient yield strength.
  • the component after die casting to increase the ductility to the desired level in a temperature range from 380 to 410 ° C for 90 to 10 minutes of heterogenization annealing is subjected.
  • the heterogenization annealing according to the invention is also an annealing in which the Supersaturation of the rapid solidification is reduced. For the diffusion required for this Si is used for annealing in the temperature range between 380 and 410 ° C carried out. This heterogenization annealing ensures that the Al matrix becomes completely ductile. The crash behavior of the component is improved, because there are larger deformation paths during the ductile fracture.
  • An essential aspect of the heat treatment method according to the invention lies in that to a high temperature anneal followed by water quenching dispensed with and the component can be manufactured without warpage.
  • the component is cured before the heterogenization annealing in order to set the desired strength level, preferably in the temperature range of the precipitation hardening of Mg 2 Si in the falling part of the hardness curve.
  • This pre-hardening brings a higher level of strength than in the cast state and thus creates a defined initial state.
  • the temperatures and times used for this pre-hardening are in the over-hardening range and aim to produce a pre-segregation of Mg 2 Si precipitates which is as homogeneous as possible. It is thus achieved that the heterogenization annealing can take place with short diffusion paths, ie with shorter times, and consequently a structure which is very homogeneous with respect to the coarsened Mg 2 Si particles.
  • Pre-curing in a temperature range of approximately 190 to 210 ° C. is preferred carried out.
  • Rapid solidification of thin-walled castings leads to high Si supersaturation, which can be greater than the equilibrium solubility (> 1.60% Si).
  • the heat treatment usually carried out according to the prior art at 490 to 530 ° C. with subsequent quenching treatment in water reduces the Si supersaturation to 0.7 to 0.8% Si, while at the same time creating the prerequisite for hardening the workpiece by precipitation hardening of Mg 2 Si to bring higher strength.
  • the increase in ductility usually determined as an A5 elongation at break by tensile testing, can be explained by reducing the Si supersaturation and by simultaneously rounding (shaping) the Si or Mg 2 Si eutectic.
  • the essential essence of the present invention lies in the over-hardening of the Al matrix to be controlled so that the desired yield point is reached. At the same time the diffusion of the Si, which takes place at a higher temperature, rapidly degrades the high Enable casting supersaturation of Si.
  • the coarsening of the hardening phase Mg 2 Si is specifically controlled by placing the aforementioned pre-hardening in the temperature range of the precipitation hardening of Mg 2 Si in the falling part of the hardness curve of the heterogenization annealing, an optimal ratio of yield strength and elongation at break can be achieved.
  • the demixing reaction of the Mg 2 Si is controlled in a controlled manner by coarsening the Mg 2 Si particles already present.
  • An aluminum alloy used with preference contains essential alloy elements 2.0 to 11.0% by weight of Si and 0.10 to 5.5% by weight of Mg.
  • the aluminum alloy can optionally be used still contain 0.1 to 0.5 wt .-% Fe and 0.1 to 1.2 wt .-% Mn.
  • the aluminum alloy can add further elements individually max. 0.05 wt%, total Max. 0.2% by weight, as well as aluminum as the remainder along with production-related impurities contain.
  • the heterogenization annealing expediently takes place continuously in one Continuous furnace, preferably in the passage through a heating zone with controllable heat transfer.
  • the preferred field of application of the method according to the invention is in production thin-walled components with high absorption capacity for kinetic energy through plastic deformation, i.e. crash-relevant components, such as those used as safety parts in the Vehicle construction and in particular used in the automotive industry.
  • Fig. 1 shows schematically the conditions for the pre-hardening in the temperature range of the precipitation hardening of Mg 2 Si in the falling part of the hardening curve for three different annealing temperatures.
  • alloy Composition (% by weight) Si Fe Mn mg Ti 1 2.5 0.1 0.68 5.4 00:14 2 10.4 0.1 00:57 00:11 00:04

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Extrusion Of Metal (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Forging (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Continuous Casting (AREA)
  • Heat Treatment Of Articles (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Claims (9)

  1. Procédé pour la fabrication d'un composant constitué d'un alliage d'aluminium durcissable par précipitation de Mg2Si, avec eutectique de Si et/ou de Mg2Si, par moulage sous pression, caractérisé en ce qu'après la moulage sous pression, le composant subit un recuit d'hétérogénéisation dans une plage de température de 380 à 410° C pendant une durée de 90 à 10 min. pour augmenter sa ductilité dans la mesure souhaitée.
  2. Procédé selon la revendication 1, caractérisé en ce qu'avant le recuit d'hétérogénéisation destiné à établir le niveau de résistance mécanique souhaité, le composant est durci dans une plage de température du durcissement par précipitation de Mg2Si, dans la partie descendante de la courbe de durcissement.
  3. Procédé selon la revendication 2, caractérisé en ce que le durcissement est réalisé dans une plage de température de 190 à 210° C.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que l'alliage d'aluminium contient comme éléments d'alliage essentiels de 2,0 à 11,0 % en poids de Si et de 0,10 à 5,5 % en poids de Mg.
  5. Procédé selon la revendication 4, caractérisé en ce que l'alliage d'aluminium contient encore de 0,1 à 0,5 % en poids de Fe et de 0,2 à 1,2 % en poids de Mn.
  6. Procédé selon la revendication 4 ou 5, caractérisé en ce que l'alliage d'aluminium contient d'autres éléments à une teneur individuelle maximale de 0,05 % en poids et à une teneur globale maximale de 0,2 % en poids, le solde étant formé de l'aluminium en plus d'impuretés résultant de sa fabrication.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que le recuit d'hétérogénéisation est réalisé en continu dans un four continu.
  8. Procédé selon l'une des revendications 1 à 7, pour la fabrication de composants à parois minces à haute capacité de reprise d'énergie cinétique par déformation plastique.
  9. Procédé selon l'une des revendications 1 à 7, dans lequel le composant préparé est utilisé comme composant de sécurité en construction de véhicules.
EP98810062A 1998-01-29 1998-01-29 Procédé pour la fabrication d'un pièce coulée sous pression en alliage d'aluminium Expired - Lifetime EP0933441B1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DK98810062T DK0933441T3 (da) 1998-01-29 1998-01-29 Fremgangsmåde til fremstilling af en konstruktionsdel af en aluminiumslegering ved trykstøbning
DE59805967T DE59805967D1 (de) 1998-01-29 1998-01-29 Verfahren zur Herstellung eines Bauteiles aus einer Aluminiumlegierung durch Druckgiessen
AT98810062T ATE226263T1 (de) 1998-01-29 1998-01-29 Verfahren zur herstellung eines bauteiles aus einer aluminiumlegierung durch druckgiessen
SI9830301T SI0933441T1 (en) 1998-01-29 1998-01-29 Process for producing an aluminium alloy pressure die cast component
PT98810062T PT933441E (pt) 1998-01-29 1998-01-29 Processo para a fabricacao de um componente de uma liga de aluminio por moldacao por moldacao por injeccao sob pressao
EP98810062A EP0933441B1 (fr) 1998-01-29 1998-01-29 Procédé pour la fabrication d'un pièce coulée sous pression en alliage d'aluminium
ES98810062T ES2181152T3 (es) 1998-01-29 1998-01-29 Procedimiento para fabricar una pieza de montaje a partir de una aleacion de aluminio mediante colada a presion.
BR9900621-9A BR9900621A (pt) 1998-01-29 1999-01-28 Processo para produção de um componente de uma liga de alumínio por fundição injetada

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98810062A EP0933441B1 (fr) 1998-01-29 1998-01-29 Procédé pour la fabrication d'un pièce coulée sous pression en alliage d'aluminium

Publications (2)

Publication Number Publication Date
EP0933441A1 EP0933441A1 (fr) 1999-08-04
EP0933441B1 true EP0933441B1 (fr) 2002-10-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810062A Expired - Lifetime EP0933441B1 (fr) 1998-01-29 1998-01-29 Procédé pour la fabrication d'un pièce coulée sous pression en alliage d'aluminium

Country Status (8)

Country Link
EP (1) EP0933441B1 (fr)
AT (1) ATE226263T1 (fr)
BR (1) BR9900621A (fr)
DE (1) DE59805967D1 (fr)
DK (1) DK0933441T3 (fr)
ES (1) ES2181152T3 (fr)
PT (1) PT933441E (fr)
SI (1) SI0933441T1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19916037C1 (de) * 1999-04-09 2000-09-14 Daimler Chrysler Ag Verfahren zur Herstellung von leistungsführenden Getriebeteilen
DE102008056511B4 (de) * 2008-11-08 2011-01-20 Audi Ag Verfahren zur Herstellung dünnwandiger Metallbauteile aus einer AI-SiMg-Legierung, insbesondere von Bauteilen eines Kraftfahrzeugs
GB2522716B (en) * 2014-02-04 2016-09-14 Jbm Int Ltd Method of manufacture
KR102602980B1 (ko) 2018-04-16 2023-11-16 현대자동차주식회사 다이캐스팅용 알루미늄 합금 및 이를 이용한 알루미늄 합금 주조물 제조방법
KR20210076329A (ko) * 2019-12-16 2021-06-24 현대자동차주식회사 다이캐스팅용 알루미늄 합금 및 이를 이용한 알루미늄 합금 주조물 제조방법

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB613413A (en) * 1942-03-21 1948-11-29 Clay Patrick Bedford Improvements in or relating to methods of shipbuilding

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB390244A (en) * 1931-11-14 1933-04-06 Horace Campbell Hall Improvements in the heat treatment of aluminium alloys
FR2323771A1 (fr) * 1975-09-12 1977-04-08 Snecma Perfectionnements aux pieces moulees en alliage hypoeutectique aluminium-silicium au magnesium et aux traitements thermiques desdites pieces
US4419143A (en) * 1981-11-16 1983-12-06 Nippon Light Metal Company Limited Method for manufacture of aluminum alloy casting
EP0743372B1 (fr) * 1995-05-19 2002-01-23 Tenedora Nemak, S.A. de C.V. Procédé et appareil pour l'obtention facilitée d'un alliage d'aluminium durcissable par traitement thermique

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB613413A (en) * 1942-03-21 1948-11-29 Clay Patrick Bedford Improvements in or relating to methods of shipbuilding

Also Published As

Publication number Publication date
PT933441E (pt) 2003-02-28
ES2181152T3 (es) 2003-02-16
BR9900621A (pt) 1999-12-14
ATE226263T1 (de) 2002-11-15
EP0933441A1 (fr) 1999-08-04
DE59805967D1 (de) 2002-11-21
DK0933441T3 (da) 2003-02-17
SI0933441T1 (en) 2003-04-30

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