EP3775309A1 - Aluminium-druckgusslegierung - Google Patents
Aluminium-druckgusslegierungInfo
- Publication number
- EP3775309A1 EP3775309A1 EP20711910.8A EP20711910A EP3775309A1 EP 3775309 A1 EP3775309 A1 EP 3775309A1 EP 20711910 A EP20711910 A EP 20711910A EP 3775309 A1 EP3775309 A1 EP 3775309A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- aluminum die
- cast alloy
- alloy according
- molybdenum
- 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.)
- Granted
Links
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
- C22C21/04—Modified aluminium-silicon alloys
-
- 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
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
-
- 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
Definitions
- the invention relates to an aluminum die-cast alloy and a structural component for a motor vehicle.
- EP 1 443 122 B1 discloses an aluminum alloy for die casting components with high elongation in the as-cast state. Further compositions for aluminum die-cast alloys are described in EP 1 719 820 A2, DE 10 2006 039 684 B4 or DE 10 2010 055 011 A1.
- manganese is partially added to the alloy in order to reduce the tendency to stick to the die casting mold and thus improve the demoldability of the finished cast parts.
- the manganese content is typically between 0.3 and 0.8% by weight. With a manganese content of less than 0.3% by weight, there is an increased tendency to stick and a complex casting can no longer be removed from the mold. Such a tendency to stick is not only disruptive to the process and the dimensional accuracy, but also leads to increased wear on the casting tool. On the other hand, too high a manganese content of more than 0.8% by weight due to the formation of coarse, in termetallic precipitates, causes the material to become brittle and therefore a reduction in ductility or deformability.
- molybdenum is added to the alloy. By adding molybdenum, the increased tendency to stick by reducing the manganese content can be counteracted.
- molybdenum is relatively expensive as an element, which increases the cost of such a raw material.
- the inventors have surprisingly found that a reduction in the molybdenum content and the simultaneous use of chromium promote a reduction in the tendency to stick and an increase in ductility.
- a portion of molybdenum possibly also the entire portion of molybdenum, is replaced by chromium. Even very small amounts of chromium are sufficient here to achieve a significant effect.
- This at least partial substitution of molybdenum by chromium also results in cost advantages, since the raw material price of chromium is significantly lower than that of molybdenum.
- the manganese content in the alloy can be reduced to a proportion of 0.25 to 0.6% by weight, resulting in improved development - result in formability and a higher ductility.
- the surprising thing about the alloy composition according to the invention is therefore that small proportions of chromium enable the proportion of molybdenum to be reduced, which significantly improves both the elongation at break and the demoldability.
- the silicon content of 7.5 to 11.5% by weight present in the alloy according to the invention ensures sufficient strength and a high mold filling capacity of the aluminum die-cast alloy according to the invention.
- silicon counteracts solidification voids during cooling.
- molybdenum is present in a proportion of 0.001 to 0.048% by weight, in particular 0.001 to 0.043% by weight, in particular 0.024 to 0.043% by weight.
- a proportion of molybdenum has proven to be very suitable in terms of good demoldability and high ductility.
- chromium is provided in a proportion of 0.04 to 0.05% by weight, in particular 0.04 to 0.048% by weight, the tendency of the material to stick can be further reduced and the ductility of the same can be optimized.
- manganese is present in a proportion of 0.35 to 0.6% by weight, in particular 0.45 to 0.55% by weight. Such a proportion of manganese has proven to be particularly advantageous with regard to a low tendency to stick.
- the following further alloy components can be provided: 0.001 to 0.15% by weight iron and / or 0.001 to 0.08% by weight magnesium and / or 0.004 to 0.15% by weight titanium and / or 0.01 to 0.2 wt% zirconium and / or 0.008 to 0.02 wt% strontium and / or 0.001 to 0.1 wt% vanadium.
- the rule here is that iron as a contaminant element always occurs in small quantities in the alloy, i.e. the lower the iron content, the more expensive rer is the pure aluminum.
- the strength can be increased, which is done in particular with larger wall thicknesses of the component made from the alloy, in particular with wall thicknesses of 3.5-8 mm, since due to the slower quenching of the material in the Die strength tends to be lower.
- a structural component for a motor vehicle, produced from an aluminum die-cast alloy according to the invention, is specified in claim 9.
- Such a structural component can be used for a wide variety of purposes in motor vehicles, since it has the required strength as well as sufficient ductility and good demoldability.
- a very advantageous development of the structural component can consist in that the structural component is designed as a thin-walled strut mount, battery tray or connecting part and is manufactured without heat treatment.
- the aluminum die-cast alloy according to the invention is particularly well suited for the components mentioned; however, it can also be used for other components. By dispensing with heat treatment of the structural component, warping of the same is avoided, so that a high level of accuracy of the components can be achieved.
- the improved demoldability that can be achieved with the aluminum die-cast alloy according to the invention could be clearly demonstrated, as described below, can also be found in the table below leaves.
- the mechanical parameters, ie the strength and the ductility, were determined on flat tensile specimens with an average wall thickness of 3.5 mm. To this end, three different compositions of a basic alloy were compared with one another and a test cast with a maximum of 250 casts was carried out.
- the test was carried out until the process was interrupted due to the component sticking to the casting mold or an impossible removal of the component. In those cases in which the process was not interrupted, the test was terminated as OK after 250 castings.
- the column "Demouldability" the number of components cast without interruption up to a process interruption due to no demouldability or up to a maximum of 250 castings is indicated.
- composition of the base alloy used was as follows: AISi1 OFeO, 13Mg0.04Ti0.09Zr0, 15Sr0.012.
- Alloy 1 according to the prior art could be demolded very well, but had a very low elongation at break due to the high manganese content.
- the manganese content was reduced, which, however, led to an increased tendency to stick and therefore poorer demoldability. Basically, the reduction in the manganese content is also noticeable in a higher elongation at break with a slightly lower yield point.
- the alloys 6 and 7 are two different versions of the aluminum die-cast alloy according to the present invention.
- the molybdenum content was reduced and chromium was also added.
- the strength of the two alloys 6 and 7 is also sufficient for the purpose for which they are intended.
- the table shows the effect of the molybdenum and chromium used on the properties of the aluminum die-cast alloy as described above.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019205267.3A DE102019205267B3 (de) | 2019-04-11 | 2019-04-11 | Aluminium-Druckgusslegierung |
| PCT/EP2020/057086 WO2020207708A1 (de) | 2019-04-11 | 2020-03-16 | Aluminium-druckgusslegierung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3775309A1 true EP3775309A1 (de) | 2021-02-17 |
| EP3775309B1 EP3775309B1 (de) | 2021-12-15 |
Family
ID=69845424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20711910.8A Active EP3775309B1 (de) | 2019-04-11 | 2020-03-16 | Aluminium-druckgusslegierung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3775309B1 (de) |
| DE (1) | DE102019205267B3 (de) |
| ES (1) | ES2904262T3 (de) |
| WO (1) | WO2020207708A1 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021114484A1 (de) | 2021-06-07 | 2022-12-08 | Audi Aktiengesellschaft | Aluminium-Gusslegierung |
| DE102021131973A1 (de) | 2021-12-03 | 2023-06-07 | Audi Aktiengesellschaft | Aluminium-Druckgusslegierung |
| DE102021131935A1 (de) | 2021-12-03 | 2023-06-07 | Audi Aktiengesellschaft | Aluminium-Druckgusslegierung |
| CN115612898B (zh) * | 2022-05-05 | 2024-06-07 | 蔚来汽车科技(安徽)有限公司 | 铝合金以及采用其制备的零部件 |
| DE102023114500A1 (de) | 2023-06-02 | 2024-12-05 | Audi Aktiengesellschaft | Verfahren zum Herstellen einer Aluminium-Druckgusslegierung mit Sekundäraluminiumanteil, Aluminium-Druckgusslegierung mit Sekundäraluminiumanteil sowie Strukturbauteil für ein Kraftfahrzeug |
| DE102024129876A1 (de) | 2024-10-15 | 2026-04-16 | Audi Aktiengesellschaft | Aluminiumlegierung für Strukturgussanwendungen, Verwendung der Aluminiumlegierung zum Druckgießen von Strukturbauteilen, Strukturbauteil für ein Kraftfahrzeug und Kraftfahrzeug mit dem Strukturbauteil |
| DE102024129878A1 (de) | 2024-10-15 | 2026-04-16 | Audi Aktiengesellschaft | Aluminiumlegierung für Strukturgussanwendungen, Verwendung der Aluminiumlegierung zum Druckgießen von Strukturbauteilen, Strukturbauteil für ein Kraftfahrzeug und Kraftfahrzeug mit dem Strukturbauteil |
| DE102024129880B3 (de) | 2024-10-15 | 2026-04-23 | Audi Aktiengesellschaft | Aluminiumlegierung für Strukturgussanwendungen, Verwendung der Aluminiumlegierung zum Druckgießen von Strukturbauteilen, Strukturbauteil für ein Kraftfahrzeug und Kraftfahrzeug |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD281718A7 (de) * | 1984-02-09 | 1990-08-22 | Dmi | Aluminiumgusslegierung |
| AT404844B (de) * | 1997-03-03 | 1999-03-25 | Aluminium Lend Gmbh | Druckgusslegierung |
| US20050161128A1 (en) * | 2002-03-19 | 2005-07-28 | Dasgupta Rathindra | Aluminum alloy |
| EP1443122B1 (de) * | 2003-01-23 | 2009-07-29 | ALUMINIUM RHEINFELDEN GmbH | Druckgusslegierung aus Aluminiumlegierung |
| EP1719820A3 (de) * | 2005-05-03 | 2006-12-27 | ALUMINIUM RHEINFELDEN GmbH | Aluminium-Gusslegierung |
| DE102006039684B4 (de) * | 2006-08-24 | 2008-08-07 | Audi Ag | Aluminium-Sicherheitsbauteil |
| DE102009012073B4 (de) * | 2009-03-06 | 2019-08-14 | Andreas Barth | Verwendung einer Aluminiumgusslegierung |
| DE102010055011A1 (de) * | 2010-12-17 | 2012-06-21 | Trimet Aluminium Ag | Gut gießbare, duktile AlSi-Legierung und Verfahren zur Herstellung eines Gussteils unter Verwendung der AlSi-Gusslegierung |
| EP2471967B2 (de) * | 2010-12-28 | 2025-07-30 | Casa Maristas Azterlan | Verfahren zum Erhalt verbesserter mechanischer Eigenschaften in rezykliertem Aluminiumguss ohne plättchenförmige Betaphasen |
| EP2653579B1 (de) * | 2012-04-17 | 2014-10-15 | Georg Fischer Druckguss GmbH & Co. KG | Aluminium-Legierung |
| EP2735621B1 (de) * | 2012-11-21 | 2015-08-12 | Georg Fischer Druckguss GmbH & Co. KG | Aluminium-Druckgusslegierung |
| EP2865773B1 (de) * | 2013-10-23 | 2016-04-13 | Befesa Aluminio, S.L. | Aluminiumgusslegierung |
| 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 |
-
2019
- 2019-04-11 DE DE102019205267.3A patent/DE102019205267B3/de active Active
-
2020
- 2020-03-16 EP EP20711910.8A patent/EP3775309B1/de active Active
- 2020-03-16 ES ES20711910T patent/ES2904262T3/es active Active
- 2020-03-16 WO PCT/EP2020/057086 patent/WO2020207708A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019205267B3 (de) | 2020-09-03 |
| ES2904262T3 (es) | 2022-04-04 |
| EP3775309B1 (de) | 2021-12-15 |
| WO2020207708A1 (de) | 2020-10-15 |
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