EP4392588A1 - Alliage pour coulée à base d'aluminium amélioré - Google Patents

Alliage pour coulée à base d'aluminium amélioré

Info

Publication number
EP4392588A1
EP4392588A1 EP22859593.0A EP22859593A EP4392588A1 EP 4392588 A1 EP4392588 A1 EP 4392588A1 EP 22859593 A EP22859593 A EP 22859593A EP 4392588 A1 EP4392588 A1 EP 4392588A1
Authority
EP
European Patent Office
Prior art keywords
alloy
casting
aluminium
based alloy
less
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.)
Pending
Application number
EP22859593.0A
Other languages
German (de)
English (en)
Inventor
Roger Neil Lumley
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.)
AW Bell Pty Ltd
Original Assignee
AW Bell Pty 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 claimed from AU2021902652A external-priority patent/AU2021902652A0/en
Application filed by AW Bell Pty Ltd filed Critical AW Bell Pty Ltd
Publication of EP4392588A1 publication Critical patent/EP4392588A1/fr
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/02Making non-ferrous alloys by melting
    • C22C1/026Alloys based on aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/02Alloys based on aluminium with silicon as the next major constituent
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/043Changing 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

Definitions

  • the present invention relates to an aluminium based alloy for the manufacture of cast parts.
  • the invention particularly relates to aluminium-silicon- copper based casting alloys suitable for sand or investment casting and it will be convenient to hereinafter disclose the invention in relation to that exemplary application.
  • the invention is not limited to that application and could be used in a number of low pressure casting processes.
  • Typical age hardenable aluminium castings are based around the Al-Si-X alloying system, with a range of alloying elements present.
  • Other, less common alloy systems include those based around the Al-Cu-X system, which are also age-hardenable alloys.
  • the advantages of the Al-Si-X alloys include low cost and very good castability especially when using methods such as sand casting, low pressure casting, and investment casting.
  • alloys in the Al-Cu-X family of castings have relatively poor castability and are prone to hot tearing, but they may develop high levels of strength properties, especially when silver is added to their composition. These silver containing alloys have a significant cost penalty associated with their use, since even 0.5% silver can double the base price of a primary alloy.
  • AMS-A- 21 180C (“Aluminum-Alloy Castings, High Strength”) is a widely used example that is also reflective of the contents of the MMPDS (Metallic Materials Properties Development and Standardization).
  • MMPDS Metallic Materials Properties Development and Standardization
  • the high strength aluminium alloy castings covered by AMS-A-21180C (2017) are intended for airframe, missile, and other applications where high strength, ductility, soundness and uniform composition within each casting are required.
  • high pressure diecasting alloys are that they must contain high levels of iron or combined iron + manganese, at around 1 % total content, to avoid die soldering.
  • Donohue and Lumley (R. J. Donahue & R. N. Lumley, Chapter 6, New Hypoeutectic I Hypereutectic die casting alloys and new permanent mold casting alloys that rely on strontium for their die soldering resistance, in Fundamentals of Aluminium Metallurgy, Recent Advances, R. N.
  • B380 composition is the same as A 380 but with a maximum 1 .0%Zn;
  • E380 composition is the same as C380 but the lower limit of Mg is absent.
  • the composition is free of beryllium, rare earth elements, and free of chromium and other transition metal elements not including (i.e. with the exception of) Ti, Mn, Fe, Ni, Cu, Sr and Zn.
  • the method of this second aspect is highly suited to the processes of investment casting and sand casting, but may also find utility with other casting techniques such as gravity casting.
  • the cast alloy can be subjected to any number of secondary treatment processes including but not limited to heat treatment including tempering, annealing or the like, age hardening, solution heat treatment or the like.
  • heat treatment procedures may be utilised, such as T4, T5, T6, T7, T8 or T9 tempers, depending on the desired material properties and result.
  • Figure 4 shows the microstructure generated from an investment casting made from Alloy 3.
  • the present invention provides an aluminium-silicon-copper based casting alloy which can be cast to produce a casting having high strength combined with good levels of tensile ductility.
  • the castings may be produced by high integrity premium casting processes to achieve minimum levels of porosity and finer microstructures.
  • the castings may be used together with chills or artificial cooling for critical locations to achieve fine microstructures.
  • a wide variety of heat treatment procedures may be utilised, such as T4, T5, T6, T7, T8 or T9 tempers for example, depending on the desired result.
  • Figure 1 shows a thermal analysis scans showing cooling curves of Al-Si- Cu alloys in accordance with the present invention. These were conducted using a standard thermal analysis method wherein a molded sand cast cup is used and the change in temperature is recorded as the metal cools.
  • the sand molded cup for tracking the cooling curve is known as a QuiK-Cup-(without Te) commercially available from Heraeus Electronite, which is connected directly to a Picolog TC- 08 datalogger.
  • a small sample of molten aluminium is taken from the prepared melt and poured into the sand cup, which contains a thermocouple and enables an accurate logging of the change in temperature of the metal under standard conditions.
  • Table 10 shows the composition of a test aerospace casting of a part where the test bars were integrally cast with the part.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

L'invention concerne un alliage à base d'aluminium constitué essentiellement (% en poids) : de silicium, de 4,0 à 8,5 % de magnésium, de 0,07 à 0,3 % de titane, de 0,06 à 0,2 % de manganèse, de < 0,05 % de fer, de < 0,15 % de chrome, de < 0,01 % de nickel, de < 0,01 % de cuivre, de 2,5 à 4 % de zinc, de 0 à 0,5 % de strontium, de > 0,001 à 0,03 % de béryllium, de moins de 0,0005 % d'étain, de moins de 0,01 % d'autres éléments (chacun), de moins de 0,05 % de chaque autre élément total, de moins de 0,15 % au total, et d'un reste d'aluminium et d'autres impuretés inévitables.
EP22859593.0A 2021-08-23 2022-08-18 Alliage pour coulée à base d'aluminium amélioré Pending EP4392588A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2021902652A AU2021902652A0 (en) 2021-08-23 Improved Aluminium Based Casting Alloy
PCT/AU2022/050921 WO2023023704A1 (fr) 2021-08-23 2022-08-18 Alliage pour coulée à base d'aluminium amélioré

Publications (1)

Publication Number Publication Date
EP4392588A1 true EP4392588A1 (fr) 2024-07-03

Family

ID=85321353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22859593.0A Pending EP4392588A1 (fr) 2021-08-23 2022-08-18 Alliage pour coulée à base d'aluminium amélioré

Country Status (3)

Country Link
EP (1) EP4392588A1 (fr)
AU (1) AU2022333523A1 (fr)
WO (1) WO2023023704A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2009242962A1 (en) * 2008-04-30 2009-11-05 Commonwealth Scientific And Industrial Research Organisation Improved aluminium based casting alloy
FR2934607B1 (fr) * 2008-07-30 2011-04-29 Alcan Int Ltd Piece moulee en alliage d'aluminium a hautes resistances a la fatigue et au fluage a chaud
GB2553366A (en) * 2016-09-06 2018-03-07 Jaguar Land Rover Ltd A casting alloy

Also Published As

Publication number Publication date
AU2022333523A1 (en) 2024-03-28
WO2023023704A1 (fr) 2023-03-02

Similar Documents

Publication Publication Date Title
CA2574962C (fr) Alliage al-si-mg-zn-cu pour pieces coulees utilisees dans l&#39;aerospatiale et l&#39;industrie automobile
Colombo et al. Influences of different Zr additions on the microstructure, room and high temperature mechanical properties of an Al-7Si-0.4 Mg alloy modified with 0.25% Er
US7625454B2 (en) Al-Si-Mg-Zn-Cu alloy for aerospace and automotive castings
US20200190634A1 (en) Method of forming a cast aluminium alloy
US9771635B2 (en) Cast aluminum alloy for structural components
WO2005075692A1 (fr) Alliage d&#39;aluminium pour produire des coulages formes haute performance
CN106609331A (zh) 高塑性压铸镁合金及其成形方法
EP1759028A2 (fr) Alliage al-zn-mg apte au traitement thermique pour pieces coulees automobiles et aerospatiaux
US4555272A (en) Beta copper base alloy adapted to be formed as a semi-solid metal slurry and a process for making same
EP1065292B1 (fr) Traitement thermique pour pièces coulées en alliage d&#39;aluminium pour augmenter la résistance mécanique à haute température
US3765877A (en) High strength aluminum base alloy
US4642146A (en) Alpha copper base alloy adapted to be formed as a semi-solid metal slurry
US20020155023A1 (en) Foundry alloy
US4585494A (en) Beta copper base alloy adapted to be formed as a semi-solid metal slurry and a process for making same
US7201210B2 (en) Casting of aluminum based wrought alloys and aluminum based casting alloys
JP7096690B2 (ja) ダイカスト鋳造用アルミニウム合金およびアルミニウム合金鋳物
AU2022333523A1 (en) Improved aluminium based casting alloy
US4661178A (en) Beta copper base alloy adapted to be formed as a semi-solid metal slurry and a process for making same
Cinto et al. Development of High Strength to Weight Ratio Aluminium–Magnesium Alloy with Enhanced Corrosion Resistance
CA3117862A1 (fr) Alliages d&#39;aluminium-lithium de la serie 2xxx
AU2022331917A1 (en) Aluminium casting alloy displaying improved thermal conductivity
JP2018165405A (ja) コーティングがない低圧永久鋳型のための方法および合金
KR810002048B1 (ko) 다이케스트용 내식성 Al 합금
EP0870846A1 (fr) Alliages à base de zinc, contenant du titane
AU745375B2 (en) Foundry alloy

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20240219

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR