WO2022162245A1 - Alliage d'aluminium, composant en alliage d'aluminium, et procédé de fabrication d'un composant en alliage d'aluminium - Google Patents

Alliage d'aluminium, composant en alliage d'aluminium, et procédé de fabrication d'un composant en alliage d'aluminium Download PDF

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Publication number
WO2022162245A1
WO2022162245A1 PCT/EP2022/052358 EP2022052358W WO2022162245A1 WO 2022162245 A1 WO2022162245 A1 WO 2022162245A1 EP 2022052358 W EP2022052358 W EP 2022052358W WO 2022162245 A1 WO2022162245 A1 WO 2022162245A1
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WO
WIPO (PCT)
Prior art keywords
weight
silicon
casting
aluminum
cast
Prior art date
Application number
PCT/EP2022/052358
Other languages
German (de)
English (en)
Inventor
Jan STEGLICH
Marcel Rosefort
Original Assignee
Trimet Aluminium Se
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 Trimet Aluminium Se filed Critical Trimet Aluminium Se
Priority to EP22709599.9A priority Critical patent/EP4284954A1/fr
Priority to CN202280012637.5A priority patent/CN117062926A/zh
Publication of WO2022162245A1 publication Critical patent/WO2022162245A1/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
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
    • B22D21/04—Casting aluminium or magnesium
    • 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
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium

Definitions

  • Aluminum alloy aluminum alloy component and method of manufacturing an aluminum alloy component
  • the present invention relates to an aluminum alloy for die casting, an aluminum alloy die cast component and a die casting method for producing an aluminum alloy component.
  • Die-casting is an economical process for the series production of components, for example for motor vehicles.
  • structural components for motor vehicles on the one hand low weight and low unit costs are desired, on the other hand there are high demands on the ductility of the material and the energy absorption capacity of the finished component.
  • the energy absorption capacity of the finished component is particularly important for components that are intended to deform in the event of a crash.
  • the aluminum alloys suitable for this are also referred to as crash alloys.
  • the material should be able to be processed reliably and allow a high series quality with as little mold wear as possible and as little post-processing of the cast structural components as possible.
  • Structural components for the automotive industry are becoming ever larger and more complex due to the integration of components and functions.
  • a waiver of the heat treatment and possible straightening processes of these thin-walled but large-area components results in considerable costs.
  • advantage for automobile production This advantage applies in particular to battery housings in hybrid and electric vehicles. Battery boxes are integrated into the vehicle's support structure and have to carry the loads in the event of a crash.
  • an aluminum cast alloy is sought that is suitable for the production of structural components for the automotive industry, which should have good crash properties, using the die-casting process.
  • an aluminum-silicon cast alloy according to claim 1 which has the following alloy components in addition to at least 88% by weight aluminum:
  • Zinc between 0.2 and 0.8% by weight
  • Chromium between 0.1 and 0.3% by weight
  • Magnesium with up to 0.05% by weight Magnesium with up to 0.05% by weight.
  • the silicon content of the aluminum-silicon cast alloy is preferably between 7.0 and 8.5% by weight and particularly preferably between 7.5 and 8.5% by weight.
  • the alloy preferably has one or more of the following alloy components:
  • Titanium between 0.04 and 0.15% by weight
  • iron with up to 0.2% by weight, Copper with up to 0.5% by weight, preferably up to 0.2
  • Molybdenum and/or zirconium together up to 0.25% by weight.
  • the magnesium content is preferably at most 0.01% by weight.
  • the aluminium-silicon cast alloy can contain up to 0.15% by weight of hafnium, cerium, lanthanum and/or another rare earth element.
  • the aluminium-silicon cast alloy AISi8ZnMn according to the invention is suitable for producing structural components with good crash properties, for example for the automotive industry in the die-casting process.
  • the components produced with the aluminum-silicon cast alloy according to the invention do not require any heat treatment after the die-casting process in order to achieve high ductility and high energy absorption capacity.
  • Die-cast components made from the aluminum-silicon cast alloy according to the invention exhibit good folding behavior and can therefore be used as crash-relevant components.
  • Previously known cast alloys for components with good crash properties either require heat treatment, e.g. solution annealing (see DIN EN 1706 EN-AC-43500,) or are difficult to cast in die casting (see DIN EN 1706 EN-AC-51500, AIMg5Si2Mn ).
  • the aluminium-silicon casting alloy AISi8ZnMn according to the invention can be easily cast in pressure die-casting due to its silicon content.
  • the flowability, mold filling and demoulding is comparable to the standard materials EN-AC-43500 and AISiOMn.
  • Die-casting alloys that require solution annealing after casting are usually cast using vacural casting - ie using a vacuum pressure die-casting process - because with classic die-casting machines there is a risk of blistering (risk of blistering), so that they are not suitable for solution annealing.
  • the standard crash alloys are alloys that require solution annealing and are therefore not cast on "classic" die casting machines.
  • the aluminium-silicon cast alloy according to the invention achieves the desired properties in terms of ductility of the material and energy absorption capacity of the finished component even without solution annealing, so that structural components produced using the aluminium-silicon cast alloy according to the invention can be used for their final purpose, e.g. as part of a vehicle without the component having to be solution annealed between die casting and installation in the vehicle.
  • the aluminum-silicon cast alloy according to the invention is very ductile and exhibits a bending angle of greater than 60°.
  • the yield point R p0.2 and the elongation at break A are due to the mixed-crystal strengthening of zinc, titanium and molybdenum in the aluminium-silicon system increased.
  • Manganese and chromium are used to ensure that the components can be removed from the die casting mold despite the low silicon and iron content.
  • a method for producing a structural component in particular for a motor vehicle, is also proposed, which is characterized in that the structural component is cast using the aluminum-silicon cast alloy according to the invention, preferably in a die-casting process.
  • the die casting mold is preferably heated to a temperature between 105° C. and 290° C. before casting and the melt of the aluminum-silicon casting alloy according to the invention preferably has a temperature between 690° C. and 725° C. immediately before casting .
  • the melt is around 10°C to 20°C hotter than in conventional die-casting processes, for example with the aluminium-silicon casting alloy AISi10MnMg.
  • the mold is somewhat colder than was usual up until then. There is preferably no solution annealing between die casting and final use of the component.
  • solution annealing is necessary for conventional components that deform in the event of a crash in order to improve the energy absorption capacity
  • a component made from the aluminum-silicon cast alloy according to the invention does not require solution annealing - on the contrary, solution annealing could actually worsen the properties.
  • the production of components from the aluminium-silicon cast alloy according to the invention is therefore more economical and the properties achieved are better.
  • a component in particular a structural component, preferably for a motor vehicle, made from the aluminum-silicon cast alloy according to the invention is also proposed.
  • the structural component is preferably a battery housing for a hybrid vehicle or a purely electric vehicle.
  • the component is preferably not solution annealed.
  • the aluminium-silicon cast alloy according to the invention is a die-cast alloy with good castability, mold filling and flowability.
  • the aluminum-silicon cast alloy according to the invention has a high ductility without heat treatment of the cast parts.
  • the aluminum-silicon casting alloy according to the invention is suitable for the pressure-casting production of structural components.
  • the very high ductility of the aluminum-silicon cast alloy according to the invention and a high energy absorption capacity enable it to be used for crash-relevant components.
  • the aluminum-silicon casting alloy according to the invention is suitable for die-casting structural components, in particular battery housings for electric and hybrid vehicles.
  • the aluminum-silicon casting alloy according to the invention is suitable for the die-casting of large components with shot weights >25 kg due to its high flowability and low tendency to stick in die-casting.
  • the aluminum-silicon casting alloy according to the invention can be applied directly to existing die-casting processes as an AISi alloy system.
  • Due to the combination of Mn, Cr and Mo in the Al-Si system, the aluminum-silicon casting alloy according to the invention has a low tendency to stick in die-casting molds.
  • the die-cast components made from the aluminum-silicon cast alloy according to the invention are suitable for industrial joining processes, in particular also for punch riveting, also with sheet metal, profiles and other materials.
  • Table 1 Main alloy range of an alloy AISi8ZnMn according to the invention
  • Table 2 (in the appendix) lists various materials and their properties.
  • the materials were manufactured and cast into permanent mold specimens for round tensile bars.
  • the tensile bars were used to determine the mechanical (mecha.) properties and the bending angle. All results apply to separately cast permanent mold specimens in condition F (as-cast condition, without heat treatment).
  • condition F as-cast condition, without heat treatment
  • the elements of the alloys in round brackets were varied in the tests in order to quantify their influence.
  • Table 2 shows that the bending angle of the newly developed materials could be almost doubled compared to the existing materials.
  • the two materials with a gray background were used for further die-casting tests and crash tests. For die-casting tests, 240 kg each of the two materials shown in italics in Table 2 (see appendix) were produced and cast into structural components in the form of a profile.
  • the die-casting tests show very good castability with low iron and manganese content of the alloys and good mechanical properties.
  • a crash test that was passed on the drop tower test stand, it was determined that the first fold of the profile remained free of cracks for 5 ms. It is required that the structural component remains free of cracks for at least 3.5 ms.
  • the die casting tests were accompanied by chill casting tests to determine the notched impact strength as a measure of the energy absorption behavior of the component. It is noticeable that the notched impact strength of the test alloys could be increased by more than four times compared to conventional aluminum die-casting alloys in condition F. The components made of these materials do not require any heat treatment.
  • Table 3 Comparison of the impact strength with mechanical properties of the two test alloys (see Table 2) above and a conventional aluminum die-cast alloy below:
  • FIG. 1 shows the yield strength R p0.2 and the elongation at break A of eight alloys tested with different zinc and titanium contents with two newly developed variants called Milestone 4.
  • Milestone 4 had the goal of increasing the yield strength, keeping the elongation at break to > 14% and at the same time limiting the use of peritectic elements to avoid the formation of undesired intermetallic phases.
  • the results of "Milestone 4" in Figure 2 surprisingly showed that these goals could be achieved with two materials.
  • the analyzes of the materials "Milestone 4" in Figure 1 are listed in Table 4 (in the appendix) and designated AISi8Zn0.6Mn0.35Zr and AISi8Zn0.4Mn0.35Cr according to the order.
  • the alloys are already very ductile in chill casting without heat treatment. Experience has shown that the strength in die casting increases significantly, with the elongation at break remaining about the same, which means that it is suitable as a naturally ductile cast alloy for structural components, in particular battery boxes for electric vehicles with crash properties.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Body Structure For Vehicles (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

L'invention concerne un alliage de coulée à base d'aluminium et de silicium ainsi que de l'aluminium et des impuretés inévitables, contenant au moins les constituants d'alliage suivants : du silicium entre 6,0 et 8,5 % en poids, du zinc entre 0,2 et 0,8 % en poids, du manganèse entre 0,2 et 0,6 % en poids, du chrome entre 0,1 et 0,3 % en poids, et du magnésium jusqu'à 0,05 % en poids. L'invention concerne en outre un composant structurel en alliage de coulée à base d'aluminium et de silicium et un procédé de coulée sous pression pour la fabrication d'un composant structurel.
PCT/EP2022/052358 2021-02-01 2022-02-01 Alliage d'aluminium, composant en alliage d'aluminium, et procédé de fabrication d'un composant en alliage d'aluminium WO2022162245A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22709599.9A EP4284954A1 (fr) 2021-02-01 2022-02-01 Alliage d'aluminium, composant en alliage d'aluminium, et procédé de fabrication d'un composant en alliage d'aluminium
CN202280012637.5A CN117062926A (zh) 2021-02-01 2022-02-01 铝合金、由铝合金制成的部件和制造由铝合金制成的部件的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021102268.1A DE102021102268A1 (de) 2021-02-01 2021-02-01 Aluminiumlegierung, Bauteil aus einer Aluminiumlegierung und Verfahren zum Herstellen eines Bauteils aus einer Aluminiumlegierung
DE102021102268.1 2021-02-01

Publications (1)

Publication Number Publication Date
WO2022162245A1 true WO2022162245A1 (fr) 2022-08-04

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PCT/EP2022/052358 WO2022162245A1 (fr) 2021-02-01 2022-02-01 Alliage d'aluminium, composant en alliage d'aluminium, et procédé de fabrication d'un composant en alliage d'aluminium

Country Status (4)

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EP (1) EP4284954A1 (fr)
CN (1) CN117062926A (fr)
DE (1) DE102021102268A1 (fr)
WO (1) WO2022162245A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040088857A (ko) * 2003-04-14 2004-10-20 현대자동차주식회사 강도 및 피로 특성이 향상된 실린더 헤드용 알루미늄 합금조성물
CN106244864A (zh) * 2016-08-30 2016-12-21 苏州梅克卡斯汽车科技有限公司 一种汽车涡轮增压器壳体及其制备方法
US20200131605A1 (en) * 2018-10-29 2020-04-30 Fna Group, Inc. Aluminum alloy
CN112048645A (zh) * 2020-08-24 2020-12-08 山东弗泽瑞金属科技有限公司 压铸铝合金材料制备方法及设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1246256B (de) 1957-11-26 1967-08-03 North American Aviation Inc Verfahren zur Verbesserung der Festigkeit und Duktilitaet von Aluminium-Silicium-Gusslegierungen
AT14019U1 (de) 2014-02-14 2015-02-15 Amag Casting Gmbh Gusslegierung
KR101641170B1 (ko) 2014-09-02 2016-07-20 삼성전자주식회사 다이캐스팅용 알루미늄 합금 및 그 제조 방법
DE102016004216A1 (de) 2016-04-07 2016-09-29 Daimler Ag Aluminiumlegierung, insbesondere für ein Gießverfahren, sowie Verfahren zum Herstellen eines Bauteils aus einer solchen Aluminiumlegierung
US20200172999A1 (en) 2016-12-22 2020-06-04 Ksm Castings Group Gmbh Al casting alloy

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040088857A (ko) * 2003-04-14 2004-10-20 현대자동차주식회사 강도 및 피로 특성이 향상된 실린더 헤드용 알루미늄 합금조성물
CN106244864A (zh) * 2016-08-30 2016-12-21 苏州梅克卡斯汽车科技有限公司 一种汽车涡轮增压器壳体及其制备方法
US20200131605A1 (en) * 2018-10-29 2020-04-30 Fna Group, Inc. Aluminum alloy
CN112048645A (zh) * 2020-08-24 2020-12-08 山东弗泽瑞金属科技有限公司 压铸铝合金材料制备方法及设备

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Publication number Publication date
CN117062926A (zh) 2023-11-14
DE102021102268A1 (de) 2022-08-04
EP4284954A1 (fr) 2023-12-06

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