EP1612286B1 - Alliage d'aluminium pour moulage sous pression - Google Patents

Alliage d'aluminium pour moulage sous pression Download PDF

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Publication number
EP1612286B1
EP1612286B1 EP05405361A EP05405361A EP1612286B1 EP 1612286 B1 EP1612286 B1 EP 1612286B1 EP 05405361 A EP05405361 A EP 05405361A EP 05405361 A EP05405361 A EP 05405361A EP 1612286 B1 EP1612286 B1 EP 1612286B1
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EP
European Patent Office
Prior art keywords
aluminium alloy
ppm
alloy according
titanium
aluminium
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
EP05405361A
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German (de)
English (en)
Other versions
EP1612286A2 (fr
EP1612286A3 (fr
Inventor
Hubert Koch
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.)
Aluminium Rheinfelden GmbH
Original Assignee
Aluminium Rheinfelden 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 Aluminium Rheinfelden GmbH filed Critical Aluminium Rheinfelden GmbH
Priority to SI200531356T priority Critical patent/SI1612286T1/sl
Priority to PL05405361T priority patent/PL1612286T3/pl
Publication of EP1612286A2 publication Critical patent/EP1612286A2/fr
Publication of EP1612286A3 publication Critical patent/EP1612286A3/fr
Application granted granted Critical
Publication of EP1612286B1 publication Critical patent/EP1612286B1/fr
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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
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C22C21/04—Modified aluminium-silicon alloys

Definitions

  • the invention relates to an aluminum alloy for die casting of components with high elongation in the cast state.
  • the die casting technology has developed so far today that it is possible to produce components with high quality standards.
  • the quality of a die-cast part depends not only on the machine setting and the chosen method, but also to a great extent on the chemical composition and microstructure of the aluminum alloy used. These two latter parameters are known to influence the castability, the feeding behavior ( G. Schindelbauer, J. Czikel “Shape Fillability and Volume Deficit of Common Die Casting Alloys", foundry research 42, 1990, p. 88/89 ), the mechanical properties and - especially important in diecasting - the lifespan of the Casting Tools (LA Norström, B. Klarenfjord, M. Svenson “General Aspect on Wash-out Mechanism in Aluminum Diecasting Dies", 17th International NADCA Diecasting Congress 1993, Cleveland OH ).
  • the die-cast parts In order that the required mechanical properties, in particular a high elongation at break, can be achieved, the die-cast parts usually have to be subjected to a heat treatment.
  • This heat treatment is necessary for the molding of the casting phases and thus for achieving a tough breaking behavior.
  • a heat treatment usually means a solution annealing at temperatures just below the solidus temperature with subsequent quenching in water or another medium to temperatures ⁇ 100 ° C.
  • the material thus treated now has a low yield strength and tensile strength.
  • a thermal aging is then carried out. This can also be done by the process, e.g. by thermal application during painting or by stress-relief annealing of an entire group of components.
  • die castings are cast close to the final dimensions, they usually have a complicated geometry with thin wall thicknesses.
  • delays have to be expected, such as reworking, e.g. by directing the castings or, in the worst case, rejects.
  • the solution annealing also causes additional costs and the economics of this production method could be significantly increased if alloys were available which meet the required properties without a heat treatment.
  • AISi alloy with good mechanical values in the as-cast state is known from US Pat EP-A-0 687 742 known.
  • EP-A-0 911 420 AlMg alloys which have a very high ductility in the cast state, but tend to have hot or cold cracks in the case of a complicated shape design and are therefore unsuitable.
  • Another disadvantage of ductile die-cast alloys is their slow aging in the cast state, which causes a temporal change in the mechanical properties, including a loss of elongation. can result. This behavior is tolerated in many applications, since the property limits are not exceeded or fallen below, but is not tolerable in some applications and can only be turned off by a targeted heat treatment.
  • the invention has for its object to provide a die casting suitable aluminum alloy, which is very easy to cast, has a high elongation in the cast state and no longer ages after casting.
  • the alloy should be well weldable and crimpable, can be riveted and have a high corrosion resistance.
  • the alloy composition according to the invention it is possible to achieve a high elongation in die-cast parts in the cast state with good values for the yield strength and the tensile strength, so that the alloy is particularly suitable for the production of safety components in the automotive industry.
  • molybdenum it has been found that by adding molybdenum, the elongation can be increased again without loss of the other mechanical properties.
  • the desired effect is achieved with an addition of 0.08 to 0.25 wt .-% Mo.
  • the elongation can be even further improved.
  • the preferred content is 0.10 to 0.18 wt% Zr.
  • the relatively large proportion of eutectic silicon is refined by strontium. Compared to granular die-cast alloys with higher impurities, the alloy according to the invention also has advantages in terms of fatigue strength.
  • the fracture toughness is higher due to the very small present mixed crystals and the refined eutectic.
  • the strontium content is preferably between 50 and 150 ppm and should generally not fall below 50 ppm, since otherwise the casting behavior can be worsened. Instead of strontium, sodium and / or calcium may be added.
  • the preferred silicon content is 8.0 to 10.0 wt% Si.
  • the limitation of the magnesium content to 0.08 to 0.25 wt .-% Mg causes the eutectic structure is not significantly coarsened and the alloy has only a low curing potential, which contributes to a high elongation.
  • the proportion of manganese prevents sticking in the mold and ensures good mold release.
  • the manganese content gives the casting a high structural strength at elevated temperature, so that with demolding with very little to no distortion is expected.
  • the iron content is preferably limited to max. Limited to 0.25 wt .-% Fe.
  • the alloy according to the invention can be riveted in the cast state.
  • the alloy according to the invention is preferably produced as a horizontal continuous casting ingot.
  • a die-cast alloy with low oxide contamination can be melted without expensive melt cleaning: an important prerequisite for achieving high elongation values in the die-cast part.
  • any contamination of the melt, in particular by copper or iron, must be avoided.
  • the cleaning of the inventive time-finished AISi alloy is preferably carried out by means of a purge gas treatment with inert gases by means of an impeller.
  • Grain refining is preferably carried out in the case of the alloy according to the invention.
  • the alloy gallium phosphide and / or indium phosphide in an amount corresponding to 1 to 250 ppm, preferably 1 to 30 ppm of phosphorus can be supplied.
  • the alloy for grain refining may also contain titanium and boron, the addition of titanium and boron via a master alloy with 1 to 2 wt .-% Ti and 1 to 2 wt .-% B, balance aluminum.
  • the aluminum master alloy contains 1.3 to 1.8% by weight of Ti and 1.3 to 1.8% by weight of B, and has a Ti / B weight ratio of about 0.8 to 1.2.
  • the content of the master alloy in the alloy of the present invention is preferably adjusted to 0.05 to 0.5% by weight.
  • the aluminum alloy according to the invention is particularly suitable for the production of safety components in diecasting.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Body Structure For Vehicles (AREA)
  • Mold Materials And Core Materials (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Metal Extraction Processes (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Claims (9)

  1. Alliage d'aluminium pour le moulage sous pression de composants à allongement élevé à l'état moulé, avec
    8,0 à 11,5 % en poids de silicium
    0,3 à 0,8 % en poids de manganèse
    0,08 à 0,25 % en poids de magnésium
    max. 0,4 % en poids de fer
    max. 0,1 % en poids de cuivre
    max. 0,1 % en poids de zinc
    max. 0,15 % en poids de titane
    0,08 à 0,25 % en poids de molybdène
    au choix encore
    0,05 à 0,3 % en poids de zirconium
    30 à 300 ppm de strontium ou 5 à 30 ppm de sodium et/ou 1 à 30 ppm de calcium pour l'amélioration durable du phosphure de gallium et/ou du phosphure d'indium en une quantité correspondant à 1 à 250 ppm de phosphore pour l'affinement du grain
    du titane et du bore, ajoutés via un pré-alliage d'aluminium avec 1 à 2 % en poids de Ti et 1 à 2 % en poids de B, pour l'affinement du grain
    et le reste étant de l'aluminium et des impuretés inévitables.
  2. Alliage d'aluminium selon la revendication 1, caractérisé par 50 à 150 ppm de strontium.
  3. Alliage d'aluminium selon la revendication 1 ou 2, caractérisé par 8,0 à 10,0 % en poids de silicium.
  4. Alliage d'aluminium selon l'une quelconque des revendications 1 à 3, caractérisé par max. 0,25 % en poids de fer.
  5. Alliage d'aluminium selon l'une quelconque des revendications 1 à 4, caractérisé par 0,10 à 0,18 % en poids de zirconium.
  6. Alliage d'aluminium selon l'une quelconque des revendications 1 à 5, caractérisé par du phosphure de gallium et/ou du phosphure d'indium en une quantité correspondant à 1 à 30 ppm de phosphore.
  7. Alliage d'aluminium selon l'une quelconque des revendications 1 à 6, caractérisé par un pré-alliage d'aluminium avec 1,3 à 1,8 % en poids de titane et 1,3 à 1,8 % en poids de bore, et un rapport pondéral titane/bore compris entre 0,8 et 1,2.
  8. Alliage d'aluminium selon la revendication 7, caractérisé par 0,05 à 0,5 % en poids du pré-alliage d'aluminium.
  9. Utilisation d'un alliage d'aluminium selon l'une quelconque des revendications 1 à 8 pour le moulage sous pression de composants de sécurité dans la construction automobile.
EP05405361A 2004-06-29 2005-05-26 Alliage d'aluminium pour moulage sous pression Active EP1612286B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200531356T SI1612286T1 (sl) 2004-06-29 2005-05-26 Aluminijeva legura za tlačno litje
PL05405361T PL1612286T3 (pl) 2004-06-29 2005-05-26 Odlewniczy stop aluminium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH10912004 2004-06-29

Publications (3)

Publication Number Publication Date
EP1612286A2 EP1612286A2 (fr) 2006-01-04
EP1612286A3 EP1612286A3 (fr) 2007-05-30
EP1612286B1 true EP1612286B1 (fr) 2011-07-13

Family

ID=34974215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05405361A Active EP1612286B1 (fr) 2004-06-29 2005-05-26 Alliage d'aluminium pour moulage sous pression

Country Status (15)

Country Link
US (1) US7108042B2 (fr)
EP (1) EP1612286B1 (fr)
JP (1) JP2006016693A (fr)
KR (2) KR101295458B1 (fr)
CN (1) CN1737176A (fr)
AT (1) ATE516379T1 (fr)
BR (1) BRPI0502521B8 (fr)
CA (1) CA2510545C (fr)
DK (1) DK1612286T3 (fr)
ES (1) ES2368923T3 (fr)
MX (1) MXPA05006962A (fr)
NO (1) NO339588B1 (fr)
PL (1) PL1612286T3 (fr)
PT (1) PT1612286E (fr)
SI (1) SI1612286T1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3235917A1 (fr) 2016-04-19 2017-10-25 Rheinfelden Alloys GmbH & Co. KG Alliage d'aluminium pour moulage sous pression
EP3235916A1 (fr) 2016-04-19 2017-10-25 Rheinfelden Alloys GmbH & Co. KG Alliage de moulage

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Publication number Priority date Publication date Assignee Title
EP3235917A1 (fr) 2016-04-19 2017-10-25 Rheinfelden Alloys GmbH & Co. KG Alliage d'aluminium pour moulage sous pression
EP3235916A1 (fr) 2016-04-19 2017-10-25 Rheinfelden Alloys GmbH & Co. KG Alliage de moulage
WO2017182103A1 (fr) 2016-04-19 2017-10-26 Rheinfelden Alloys Gmbh & Co. Kg Alliage de fonderie
WO2017182102A1 (fr) 2016-04-19 2017-10-26 Rheinfelden Alloys Gmbh & Co. Kg Alliage de coulée sous pression
US11421305B2 (en) 2016-04-19 2022-08-23 Rheinfelden Alloys Gmbh & Co. Kg Cast alloy

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US7108042B2 (en) 2006-09-19
KR101295458B1 (ko) 2013-08-09
BRPI0502521A (pt) 2007-02-13
EP1612286A2 (fr) 2006-01-04
JP2006016693A (ja) 2006-01-19
CN1737176A (zh) 2006-02-22
NO339588B1 (no) 2017-01-09
CA2510545A1 (fr) 2005-12-29
CA2510545C (fr) 2014-09-30
BRPI0502521B8 (pt) 2016-09-13
MXPA05006962A (es) 2006-01-24
KR20060046361A (ko) 2006-05-17
SI1612286T1 (sl) 2011-10-28
KR101490581B1 (ko) 2015-02-05
US20060011321A1 (en) 2006-01-19
ATE516379T1 (de) 2011-07-15
BRPI0502521B1 (pt) 2015-08-11
PL1612286T3 (pl) 2011-12-30
KR20130023330A (ko) 2013-03-07
PT1612286E (pt) 2011-09-19
EP1612286A3 (fr) 2007-05-30
DK1612286T3 (da) 2011-10-24
ES2368923T3 (es) 2011-11-23
NO20053158L (no) 2005-12-30
NO20053158D0 (no) 2005-06-28

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