EP1917372A2 - Aluminium casting alloy - Google Patents

Aluminium casting alloy

Info

Publication number
EP1917372A2
EP1917372A2 EP06791332A EP06791332A EP1917372A2 EP 1917372 A2 EP1917372 A2 EP 1917372A2 EP 06791332 A EP06791332 A EP 06791332A EP 06791332 A EP06791332 A EP 06791332A EP 1917372 A2 EP1917372 A2 EP 1917372A2
Authority
EP
European Patent Office
Prior art keywords
alloys
casting
casting alloy
alloys according
alloy
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
Application number
EP06791332A
Other languages
German (de)
French (fr)
Other versions
EP1917372B1 (en
Inventor
Lars WÜRKER
Dietrich Kahn
Andreas Hennings
Andreas BÜHRIG-POLACZEK
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.)
KSM Castings Group GmbH
Original Assignee
KSM Castings 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 KSM Castings GmbH filed Critical KSM Castings GmbH
Publication of EP1917372A2 publication Critical patent/EP1917372A2/en
Application granted granted Critical
Publication of EP1917372B1 publication Critical patent/EP1917372B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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

Definitions

  • the invention relates to aluminum casting alloys, in particular for chassis applications.
  • AISi alloys are used, which are alloyed with low levels of Mg for strength enhancement, e.g. AISi7Mg or AISiHMg.
  • Mg for strength enhancement
  • AISi (Mg, Cu) alloys are also used, but because of their corrosive properties they can only find niche applications.
  • AICu (Ti, Mg) alloys which offer the highest strengths among common alloys.
  • niche applications in the chassis area are the AlMg alloys.
  • Other alloy families, such as AIZn or AILi play no role in the chassis.
  • the components made from the above alloys are subjected to a two-stage heat treatment to obtain the desired properties.
  • the existing alloy families have the disadvantage that only a limited strength-strain ratio can be achieved.
  • the above-mentioned high-strength alloys with Cu addition are often eliminated due to the corrosive properties.
  • AlMg alloys are significantly heavier castable and therefore limited in application (component geometry).
  • the object of the invention was to develop an alloy which has properties which still have sufficiently high elongation at fracture values, in particular for applications in the automotive industry, with high material strengths. This property combination is necessary, for example, in chassis applications in order to be able to survive abuse cases.
  • the alloy has to be sufficiently castable and, owing to its composition, should not impose excessive demands on the melting process and the metal circulation.
  • Al casting alloys contain at least five of the following alloy constituents:
  • Si 2.5 to 3.3, preferably 2.7 to 3.1 wt.%
  • Mg 0.2 to 0.7, preferably 0.3 to 0.6 wt%
  • Fe ⁇ 0.18, preferably 0.05 to 0.16 wt%
  • Mn ⁇ 0.5, preferably 0.05 to 0.4 wt%
  • production-related impurities for example Pb, Ni, Zn, etc.
  • production-related impurities for example Pb, Ni, Zn, etc.
  • the alloys according to the invention have a strength-strain ratio which can not be achieved with conventional Al casting alloys under the requirement of Cu freedom.
  • pressure-assisted casting eg low pressure - counter pressure Kogillenguss - resulting from the good cast structure better mechanical technological properties.
  • the alloy is grain-fined.
  • T4 one-stage tempering treatment

Abstract

The invention relates to a light metal alloy.

Description

Al - Gusslegierungen Al casting alloys
Die Erfindung bezieht sich auf Aluminium-Gusslegierungen, insbesondere für Fahrwerksanwendungen. Hierfür werden im Allgemeinen primär erschmolzene untereutektische AISi-Legierungen angewendet, die zur Festigkeitssteigerung mit geringen Gehalten an Mg legiert sind, z.B. AISi7Mg oder AISiHMg. Vereinzelt werden auch AISi(Mg, Cu)-Legierungen verwendet, die aber aufgrund der korrosiven Eigenschaften nur Nischenanwendungen finden können. Gleiches gilt für die Familie der AICu(Ti, Mg)-Legierungen, die unter den gängigen Legierungen die höchsten Festigkeiten bieten. Ebenfalls Nischenanwendungen im Fahrwerksbereich bilden die AlMg-Legierungen. Andere Legierungsfamilien, wie AIZn oder AILi, spielen im Fahrwerk keine Rolle.The invention relates to aluminum casting alloys, in particular for chassis applications. For this purpose, primarily melted hypoeutectic AISi alloys are used, which are alloyed with low levels of Mg for strength enhancement, e.g. AISi7Mg or AISiHMg. Occasionally, AISi (Mg, Cu) alloys are also used, but because of their corrosive properties they can only find niche applications. The same applies to the family of AICu (Ti, Mg) alloys, which offer the highest strengths among common alloys. Also niche applications in the chassis area are the AlMg alloys. Other alloy families, such as AIZn or AILi, play no role in the chassis.
Üblicherweise werden die Bauteile, die aus den oben genannten Legierungen hergestellt werden, einer zweistufigen Wärmebehandlung zur Erzielung der gewünschten Eigenschaften unterzogen.Usually, the components made from the above alloys are subjected to a two-stage heat treatment to obtain the desired properties.
Generell weisen die bestehenden Legierungsfamilien den Nachteil auf, dass damit nur ein eingeschränktes Festigkeits-Dehnungsverhältnis erreichbar ist. Die zuvor genannten höherfesten Legierungen mit Cu-Zugabe scheiden aufgrund der korrosiven Eigenschaften häufig aus. AlMg-Legierungen sind deutlich schwerer vergießbar und daher in der Anwendung (Bauteilgeometrie) limitiert. Demgemäß lag der Erfindung die Aufgabe zugrunde, eine Legierung zu entwickeln, welche Eigenschaften aufweist, die insbesondere für Anwendungen im Automobilbau, bei hohen Materialfestigkeiten noch ausreichend hohe Bruchdehnungswerte aufweist. Diese Eigenschaftskombination ist beispielsweise bei Fahrwerksanwendungen notwendig, um auch Missbrauchsfälle überstehen zu können. Gleichzeitig muss die Legierung hinreichend gut vergießbar sein und soll aufgrund ihrer Zusammensetzung keine überhöhten Anforderungen an den Schmelzprozess und den Metallkreislauf stellen.In general, the existing alloy families have the disadvantage that only a limited strength-strain ratio can be achieved. The above-mentioned high-strength alloys with Cu addition are often eliminated due to the corrosive properties. AlMg alloys are significantly heavier castable and therefore limited in application (component geometry). Accordingly, the object of the invention was to develop an alloy which has properties which still have sufficiently high elongation at fracture values, in particular for applications in the automotive industry, with high material strengths. This property combination is necessary, for example, in chassis applications in order to be able to survive abuse cases. At the same time, the alloy has to be sufficiently castable and, owing to its composition, should not impose excessive demands on the melting process and the metal circulation.
Dies wird gemäß der Erfindung dadurch erzielt, dass Al-Gusslegierungen zumindest fünf der nachfolgend angeführten Legierungsbestandteile enthalten:This is achieved according to the invention in that Al casting alloys contain at least five of the following alloy constituents:
Si: 2,5 bis 3,3, vorzugsweise 2,7 bis 3,1 Gew.-%Si: 2.5 to 3.3, preferably 2.7 to 3.1 wt.%
Mg: 0,2 bis 0,7, vorzugsweise 0,3 bis 0,6 Gew.-%Mg: 0.2 to 0.7, preferably 0.3 to 0.6 wt%
Fe: < 0, 18, vorzugsweise 0,05 bis 0, 16 Gew.-%Fe: <0.18, preferably 0.05 to 0.16 wt%
Mn: < 0,5, vorzugsweise 0,05 bis 0,4 Gew.-%Mn: <0.5, preferably 0.05 to 0.4 wt%
Ti: < 0,1 , vorzugsweise 0,01 bis 0,08 Gew.-%Ti: <0.1, preferably 0.01 to 0.08 wt%
Sr: < 0,03, vorzugsweise 0,01 bis 0,03 Gew.-%Sr: <0.03, preferably 0.01 to 0.03 wt%
Sonstige: < 0,1 Gew.-% und jeweils zu 100 Gew.-% mit AI ergänzt.Other: <0.1% by weight and in each case added to 100% by weight with Al.
Gegebenenfalls sind herstellungsbedingte Verunreinigungen, z.B. Pb, Ni , Zn etc., enthalten, wie sie dem Fachmann allgemein bekannt sind. Die erfind ungsgemäßen Legierungen weisen ein Festigkeits-Dehnungsverhältnis auf, welches mit herkömmlichen Al-Gusslegierungen unter der Anforderung von Cu- Freiheit nicht erreichbar ist. Insbesondere bei druckunterstützten Gießverfahren, z.B. Niederdruck - Gegendruck-Kogillenguss - ergeben sich aus dem guten Gussgefüge bessere mechanisch technologische Eigenschaften.Optionally, production-related impurities, for example Pb, Ni, Zn, etc., are included, as are generally known to the person skilled in the art. The alloys according to the invention have a strength-strain ratio which can not be achieved with conventional Al casting alloys under the requirement of Cu freedom. In particular, in pressure-assisted casting, eg low pressure - counter pressure Kogillenguss - resulting from the good cast structure better mechanical technological properties.
Es kann weiterhin vorteilhaft sein, wenn die Legierung korngefeint ist.It may also be advantageous if the alloy is grain-fined.
Um die oben genannten Vorteile zu erzielen oder noch weiter zu entwickeln, ist es vorteilhaft, wenn die gegossenen Bauteile wärmebehandelt werden, insbesondere mit folgenden Parametern:In order to achieve or further develop the advantages mentioned above, it is advantageous if the cast components are heat-treated, in particular with the following parameters:
Lösungsglühen 490 bis 5400C für 1 bis 10hSolution annealing 490 to 540 0 C for 1 to 10h
Anlassen 150 bis 2000C für 1 bis 10hTempering 150 to 200 ° C for 1 to 10 hours
Für manche Anwendungsfälle kann es aber auch vorteilhaft sein, lediglich eine einstufige Anlassbehandlung vorzunehmen, allgemein bekannt als beispielsweise T4, T5 oder 0For some applications, however, it may also be advantageous to carry out only one-stage tempering treatment, generally known as T4, T5 or 0, for example
Neben den bereits genannten Vorteilen, die Bauteile aus Legierungen gemäß der Erfindung aufweisen, kommt noch hinzu, dass wegen der fehlenden Legierungsbestandteile Cu und Cn die Korrosionsbeständigkeit bedeutend erhöht wird. Das Produkt ist auch relativ preiswert, weil keine dasselbe verteuernden Legierungszusätze, wie z.B. SE-Metalle, verwendet werden, es kann die übliche Schmelzbehandlung angewendet werden und es bedarf keines besonderen Aufwandes zur Kreislauftrennung. Es ist auch ein vorzügliches Festigkeits-Dehnungsverhältnis bei vorzüglicher Gießbarkeit vorhanden. Die Gießbarkeit ermöglicht zum einen ein von großen Fehlern, bekannt als Lunkern, freies Gußstück, zum anderen wird die Mikrosturktur in einer solchen Weise positiv beeinflußt, daß die Anzahl innerer Kerben, die die Bruchdehnung verringern, möglichst gering gehalten wird.In addition to the advantages already mentioned, which have components made of alloys according to the invention, there is also the fact that, because of the missing alloy components Cu and Cn, the corrosion resistance is significantly increased. The product is also relatively inexpensive because no use is made of the same expensive alloying additives, such as SE metals, the usual melt treatment can be used, and it does not require any special separation of the circuit. There is also an excellent strength-elongation ratio with excellent castability. The castability, on the one hand, allows one of large defects, known as voids, to be free cast, and on the other hand, the microstructure is positively influenced in such a way that the number of internal grooves which reduce the elongation at break is minimized.
Als beispielhafte Werte sind anzuführen:As example values are to be stated:

Claims

Patentansprüche claims
1. AI-Gußlegierung, enthaltend mindestens fünf der nachfolgend angeführten Legierungsbestandteile:1. Al casting alloy containing at least five of the following alloying ingredients:
Si: 2,5 bis 3,3, vorzugsweise 2,7 bis 3,1 Gew.-%Si: 2.5 to 3.3, preferably 2.7 to 3.1 wt.%
Mg: 0,2 bis 0,7, vorzugsweise 0,3 bis 0,6 Gew.-%Mg: 0.2 to 0.7, preferably 0.3 to 0.6 wt%
Fe: < 0,18, vorzugsweise 0,05 bis 0,16 Gew.-%Fe: <0.18, preferably 0.05 to 0.16 wt%
Mn: < 0,5, vorzugsweise 0,05 bis 0,4 Gew.-%Mn: <0.5, preferably 0.05 to 0.4 wt%
Ti: < 0,1 , vorzugsweise 0,01 bis 0,08 Gew.-%Ti: <0.1, preferably 0.01 to 0.08 wt%
Sr: < 0,03, vorzugsweise 0,01 bis 0,03 Gew.-%Sr: <0.03, preferably 0.01 to 0.03 wt%
Sonstige: < 0,1 Gew.-% und jeweils zu 100 Gew.-% mit AI ergänzt.Other: <0.1% by weight and in each case added to 100% by weight with Al.
2. AI-Gußlegierungen nach Anspruch 1 , dadurch gekennzeichnet, dass die daraus gegossenen Teile lösungsgeglüht sind zwischen 490 bis 5400C für 1 bis 10h.2. Al casting alloys according to claim 1, characterized in that the cast parts thereof are solution annealed between 490 to 540 0 C for 1 to 10h.
3. AI-Gußlegierungen nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die daraus gegossenen Teile angelassen sind zwischen 150 bis 2000C für 1 bis 10h. 3. Al casting alloys according to claim 1 or 2, characterized in that the cast parts thereof are tempered between 150 to 200 0 C for 1 to 10h.
4. AI-Gußlegierungen nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Legierungen korngefeint sind.4. Al casting alloys according to one of claims 1 to 3, characterized in that the alloys are grain-finely.
5. Verwendung von AI-Gußlegierungen nach einem der vorhergehenden Ansprüche für Werkstücke, Bauteile oder Teile für beziehungsweise von Fahrwerksteilen von Kraftfahrzeugen. 5. Use of Al casting alloys according to one of the preceding claims for workpieces, components or parts for or of chassis parts of motor vehicles.
EP06791332A 2005-08-31 2006-08-30 Aluminium casting alloy Not-in-force EP1917372B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005041188 2005-08-31
DE102006010131 2006-03-06
PCT/DE2006/001525 WO2007025528A2 (en) 2005-08-31 2006-08-30 Aluminium casting alloy

Publications (2)

Publication Number Publication Date
EP1917372A2 true EP1917372A2 (en) 2008-05-07
EP1917372B1 EP1917372B1 (en) 2012-10-17

Family

ID=37517275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06791332A Not-in-force EP1917372B1 (en) 2005-08-31 2006-08-30 Aluminium casting alloy

Country Status (7)

Country Link
US (1) US20100163137A1 (en)
EP (1) EP1917372B1 (en)
JP (1) JP2009506215A (en)
DE (1) DE112006002779A5 (en)
FR (2) FR2890082B1 (en)
IT (1) ITMI20061659A1 (en)
WO (1) WO2007025528A2 (en)

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Publication number Priority date Publication date Assignee Title
DE102008055926B4 (en) 2007-11-08 2012-01-26 Ksm Castings Gmbh Front axle for motor vehicles
CN101855375A (en) 2007-11-08 2010-10-06 Ksm铸造有限公司 Cast aluminium alloy
DE202008017275U1 (en) 2007-11-08 2009-04-16 Ksm Castings Gmbh Front axle, especially for motor vehicles
DE102009048364A1 (en) 2008-10-09 2010-04-15 Ksm Castings Gmbh Front powered axle support for motor vehicle, has rear and front housings remote from each other in longitudinal direction, and housings respectively fixing gear-box and stabilizer, where housings integrated to chassis of support by bars
DE112012004236A5 (en) 2011-10-11 2014-08-21 Ksm Castings Group Gmbh casting
EP2700727B1 (en) 2012-08-23 2014-12-17 KSM Castings Group GmbH Al casting alloy
CN102979937B (en) * 2012-11-13 2015-06-03 安徽春辉仪表线缆集团有限公司 Check valve body aluminum alloy casting method
JP6448550B2 (en) * 2013-02-06 2019-01-09 ケイエスエム キャスティングズ グループ ゲゼルシャフト ミット ベシュレンクテル ハフツングＫＳＭ Ｃａｓｔｉｎｇｓ Ｇｒｏｕｐ ＧｍｂＨ Al casting alloy
DE112017007033T5 (en) 2017-03-09 2019-10-31 Gm Global Technology Operations, Llc ALUMINUM ALLOYS

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Also Published As

Publication number Publication date
EP1917372B1 (en) 2012-10-17
FR2939149A1 (en) 2010-06-04
WO2007025528A2 (en) 2007-03-08
WO2007025528A3 (en) 2007-05-03
FR2890082B1 (en) 2009-12-04
US20100163137A1 (en) 2010-07-01
FR2890082A1 (en) 2007-03-02
ITMI20061659A1 (en) 2007-03-01
JP2009506215A (en) 2009-02-12
DE112006002779A5 (en) 2008-09-04
FR2939149B1 (en) 2011-04-22

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