EP2735621B1 - Aluminium-Druckgusslegierung - Google Patents

Aluminium-Druckgusslegierung Download PDF

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Publication number
EP2735621B1
EP2735621B1 EP12193547.2A EP12193547A EP2735621B1 EP 2735621 B1 EP2735621 B1 EP 2735621B1 EP 12193547 A EP12193547 A EP 12193547A EP 2735621 B1 EP2735621 B1 EP 2735621B1
Authority
EP
European Patent Office
Prior art keywords
weight
aluminium alloy
elongation
strength
mpa
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
EP12193547.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2735621A1 (de
Inventor
Leif Speckert
Stuart Wiesner
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.)
Georg Fischer Druckguss GmbH and Co KG
Georg Fischer GmbH
Original Assignee
Georg Fischer Druckguss GmbH and Co KG
Georg Fischer 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 Georg Fischer Druckguss GmbH and Co KG, Georg Fischer GmbH filed Critical Georg Fischer Druckguss GmbH and Co KG
Priority to EP12193547.2A priority Critical patent/EP2735621B1/de
Priority to US14/083,990 priority patent/US9322086B2/en
Priority to CN201310643333.1A priority patent/CN103834835A/zh
Publication of EP2735621A1 publication Critical patent/EP2735621A1/de
Application granted granted Critical
Publication of EP2735621B1 publication Critical patent/EP2735621B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • C22C21/04—Modified aluminium-silicon alloys
    • 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
    • B22D21/002—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
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/043—Changing 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 aluminum alloy for components with increased strength with a yield strength Rp 0.2 > 120 MPa and simultaneously high elongation at break A> 7% in the cast state, a yield strength Rp 0.2 > 200 MPa and simultaneous elongation at break A> 6% after a T5 heat treatment, or a yield strength Rp 0.2 > 200 MPa and a simultaneous elongation at break A> 9% after a T6 heat treatment, in particular for structural and chassis parts of a motor vehicle.
  • the die casting technique today allows to manufacture complicated components with high strength at high elongation.
  • chassis parts are manufactured in many places in other casting processes such as chill casting.
  • the reason for this is that these components, produced by die casting, do not reach the required strength or do not reach with sufficient elongation in order to ensure a safe operating case.
  • structural and chassis parts made of die-cast alloys of the AlSi10MnMg type are usually heat-treated, for example after T6 (solution-annealed, quenched and warm-aged) or T7 (solution-annealed, quenched and overaged) ,
  • T6 solution-annealed, quenched and warm-aged
  • T7 solution-annealed, quenched and overaged
  • an alloy of this type in the as-cast state has a yield strength Rp 0.2 of about 110 MPa with an elongation at break A of 4-5%
  • a T6 heat treatment can increase to over 150 MPa with at least 7% elongation.
  • the subsequent thermal aging at 150-250 ° C fine evenly distributed Mg 2 Si precipitates are formed, which in turn increase the material strength.
  • the mechanical properties can be optimized to either strengths or elongation at break, whereby a very broad property and thus product portfolio can be imaged by an alloy.
  • a T5 heat treatment can be sufficient, that is, a hot aging at 150 - 250 ° C without previous solution annealing. Again, the increase in strength caused by the formation of Mg2Si precipitates, but to a lesser extent, since the quenching effect of a withdrawn from the casting tool component is less strong and thus the proportion of positively dissolved magnesium in ⁇ -Al drops.
  • the object of the invention is to provide an aluminum diecasting alloy, which allows by an increased strength at the same time high elongation to map both structural and chassis parts in die casting.
  • This preferably includes chassis parts which, due to the high mechanical requirements (eg yield strength Rp 0.2 > 200 MPa at an elongation at break of A> 6%) and the component geometry are produced in other methods than the die casting method.
  • the invention has for its object to ensure good castability and mold filling.
  • the alloy should allow as many joining techniques, be of high dimensional stability and have a good corrosion resistance.
  • the aluminum alloy comprises 9 to 11.5% by weight of silicon, 0.45 to 0.8% by weight of manganese, 0.2 to 1% by weight of magnesium, 0.1 to 1 , 0% by weight copper, max. 0.2% by weight of zinc, max. 0.4% by weight zirconium, max. 0.4% by weight chromium, max. 0.3% by weight of molybdenum, max. 0.2% by weight iron, max. 0.15% by weight of titanium, 0.01 to 0.02% by weight of strontium and balance aluminum and production-related impurities up to a total of max.
  • the thermal aging can also be introduced into the component within a further process step, for example a painting process.
  • the alloy composition according to the invention with the goal of increased strengths has here a target corridor for the yield strength Rp 0.2 > 200 MPa and an elongation at break A> 10%.
  • the alloy has a high curing potential, which is used by a hot aging at temperatures between 150 and 250 ° C.
  • a hot aging at temperatures between 150 and 250 ° C.
  • the desired effect is achieved by adding 0.1 to 1.0% by weight of copper, preferably 0.15 to 0.5% by weight of copper (and more preferably 0.3 to 0.5% by weight of copper) and up to 0.2% by weight of zinc achieved.
  • the addition of zinc also improves casting behavior and mold filling.
  • a combined addition of copper and zinc in a favorable ratio within the above proportions allows a further increase in strength with sufficient corrosion resistance.
  • the alloy content of silicon is 9 to 11.5 wt.%.
  • the alloying of silicon reduces the solidification shrinkage and thus serves a good casting behavior and good mold filling.
  • zirconium causes an increase in elongation without a concomitant decrease in strength, as this results in a finer eutectic microstructure.
  • the zirconium content of the diecasting alloy according to the invention is at max. 0.4% by weight.
  • An addition of up to 0.3% by weight of molybdenum also increases the elongation while maintaining the strength.
  • a combined admixture of Molybdenum and zirconium within the specified tolerances has an even greater effect on the achieved elongation at break values.
  • strontium avoids coarse and acicular formation of the AlSi eutectic.
  • the eutectic is modified so that it forms in a fine and rather lamellar structure and serves to avoid both non-refining and over-refinement.
  • chromium causes a further increase in mechanical properties, the content is here at max. 0.4% by weight, preferably at max. 0.3% by weight.
  • the combined content of manganese and iron significantly affects the life of the casting tools and the mold release.
  • the desired effect is achieved with an addition of max. 0.2% by weight of iron and a manganese content of 0.45 to 0.8% by weight. It is advantageous to keep the iron content low in order to avoid embrittlement of the material by the formation of needle-shaped AlFeSi phases in the microstructure.
  • the simultaneous addition of manganese counteracts an excessive attack of the low-iron melt on the casting tool and increases the releasability and thus the dimensional stability by reducing the sticking tendency.
  • a favorable ratio must be set in order to avoid the formation of gravitational segregations, since these negatively affect both the flowability and the tendency to adhere.
  • titanium causes grain refining of the ⁇ -Al by providing nuclei during the formation of the aluminum dendrites.
  • the titanium content is at max. 0.15% by weight.
  • a plurality of sample components in the form of a die-cast component and two spherical mold samples were produced in a die-casting process two aluminum alloys with the following alloy compositions: Alloy 1 Alloy 2 Si [% by weight] 10.9 10.5 Fe [% by weight] 0.17 0.1 Mn [% by weight] 0.45 0.46 Cu [% by weight] 0.35 0.26 Zn [% by weight] 0.07 0.1 Mg [% by weight] 0.5 0.53 Ti [% by weight] 0.08 0.12 Cr [% by weight] 0.08 0.1 Sr [% by weight] 0,014 0,014 Mo [% by weight] 0.08 0.15 Zr [% by weight] 0.13 0.15
  • the table shows that samples of alloys 1 and 2 after a T5 heat treatment have a yield strength Rp 0.2 > 220 MPa with a simultaneous breaking elongation of A> 6% and after a T6 heat treatment a yield strength Rp 0.2 > 260 MPa at an increased elongation at break> 9%.
  • the aluminum alloy according to the invention depending on the heat treatment, is particularly suitable for the production of crash and strength-relevant chassis and structural parts of a motor vehicle by diecasting. In the production of chassis components of a motor vehicle in the die casting process, a yield strength Rp 0.2 of> 200 MPa with simultaneous elongation at break of> 6% should be achieved.
  • the abovementioned aluminum alloy makes it possible to image such chassis parts in the die casting process instead of other methods such as mold or sand casting, which are commonly used for such parts, due to the inventive increase in strength at a consistently high elongation.
  • the inventive aluminum alloy is particularly suitable for the production of strength and Crashrelevanten components of a motor vehicle.
EP12193547.2A 2012-11-21 2012-11-21 Aluminium-Druckgusslegierung Active EP2735621B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP12193547.2A EP2735621B1 (de) 2012-11-21 2012-11-21 Aluminium-Druckgusslegierung
US14/083,990 US9322086B2 (en) 2012-11-21 2013-11-19 Aluminum pressure casting alloy
CN201310643333.1A CN103834835A (zh) 2012-11-21 2013-11-21 铝压铸合金

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12193547.2A EP2735621B1 (de) 2012-11-21 2012-11-21 Aluminium-Druckgusslegierung

Publications (2)

Publication Number Publication Date
EP2735621A1 EP2735621A1 (de) 2014-05-28
EP2735621B1 true EP2735621B1 (de) 2015-08-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12193547.2A Active EP2735621B1 (de) 2012-11-21 2012-11-21 Aluminium-Druckgusslegierung

Country Status (3)

Country Link
US (1) US9322086B2 (zh)
EP (1) EP2735621B1 (zh)
CN (1) CN103834835A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021131973A1 (de) 2021-12-03 2023-06-07 Audi Aktiengesellschaft Aluminium-Druckgusslegierung

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JP6034333B2 (ja) * 2014-06-04 2016-11-30 ヤマハ発動機株式会社 アルミホイールの製造方法及びアルミホイール
CN104233014B (zh) * 2014-09-30 2016-08-24 南通迪瓦特节能风机有限公司 一种轴流压缩机动叶片合金材料及其制备方法
EP3334850A4 (en) * 2015-08-13 2019-03-13 Alcoa USA Corp. IMPROVED 3XX ALUMINUM MOLD ALLOYS, AND METHODS OF MAKING SAME
FR3044326B1 (fr) * 2015-12-01 2017-12-01 Constellium Neuf-Brisach Tole mince a haute rigidite pour carrosserie automobile
DE102015015610A1 (de) 2015-12-03 2017-06-08 Audi Ag Aluminium-Silizium-Druckgusslegierung, Verfahren zur Herstellung eines Druckgussbauteils aus der Legierung und Karosseriekomponente mit einem Druckgussbauteil
CN105483462A (zh) * 2015-12-17 2016-04-13 太仓市美斯门窗有限公司 一种高硬度铝合金
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
EP3235916B1 (de) 2016-04-19 2018-08-15 Rheinfelden Alloys GmbH & Co. KG Gusslegierung
EP3235917B1 (de) * 2016-04-19 2018-08-15 Rheinfelden Alloys GmbH & Co. KG Druckgusslegierung
CN106011558B (zh) * 2016-07-06 2018-03-02 宁国市中泰汽车零部件有限公司 一种吊耳支架
WO2018046368A1 (en) * 2016-09-06 2018-03-15 Jaguar Land Rover Limited A casting alloy
US10927436B2 (en) * 2017-03-09 2021-02-23 GM Global Technology Operations LLC Aluminum alloys
CN107217179B (zh) * 2017-05-31 2019-03-19 中信戴卡股份有限公司 一种铝合金材料、其制备方法和用途
CN107447134B (zh) * 2017-08-07 2019-06-25 苏州慧驰轻合金精密成型科技有限公司 一种高强度可阳极氧化压铸铝合金及其制备方法
CN108251714B (zh) * 2017-12-25 2020-05-08 广州金邦液态模锻技术有限公司 一种挤压铸造高强韧铝合金及其挤压铸造方法
CN108179334B (zh) * 2017-12-29 2020-03-27 无锡天宝电机有限公司 一种电动机壳用材料及其制备方法
CN109811206B (zh) * 2019-03-28 2021-07-16 帅翼驰新材料集团有限公司 铸造铝合金
DE102019205267B3 (de) * 2019-04-11 2020-09-03 Audi Ag Aluminium-Druckgusslegierung
CN110512100A (zh) * 2019-09-06 2019-11-29 中北大学 一种微合金强化压铸铝合金的熔炼方法
HUE061156T4 (hu) * 2019-11-25 2023-08-28 Amag Casting Gmbh Fröccsöntött alkatrész és eljárás annak elõállítására
CN115287507A (zh) * 2022-08-02 2022-11-04 乔治费歇尔金属成型科技（苏州）有限公司 一种免热处理的铝合金、其制备方法及结构件与应用

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021131973A1 (de) 2021-12-03 2023-06-07 Audi Aktiengesellschaft Aluminium-Druckgusslegierung
WO2023099080A1 (de) 2021-12-03 2023-06-08 Audi Ag Aluminium-druckgusslegierung

Also Published As

Publication number Publication date
CN103834835A (zh) 2014-06-04
US9322086B2 (en) 2016-04-26
EP2735621A1 (de) 2014-05-28
US20140140886A1 (en) 2014-05-22

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