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EP2426228B1 - Demi-produits de tôle de magnésium ayant une capacité de formage à froid améliorée - Google Patents

Demi-produits de tôle de magnésium ayant une capacité de formage à froid améliorée Download PDF

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Publication number
EP2426228B1
EP2426228B1 EP20100175241 EP10175241A EP2426228B1 EP 2426228 B1 EP2426228 B1 EP 2426228B1 EP 20100175241 EP20100175241 EP 20100175241 EP 10175241 A EP10175241 A EP 10175241A EP 2426228 B1 EP2426228 B1 EP 2426228B1
Authority
EP
European Patent Office
Prior art keywords
magnesium
finished products
alloys
magnesium alloy
magnesium sheet
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.)
Not-in-force
Application number
EP20100175241
Other languages
German (de)
English (en)
Other versions
EP2426228A1 (fr
Inventor
Jan Bohlen
Kerstin Hantzsche
Dietmar Letzig
Karl Ulrich Kainer
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.)
Helmholtz Zentrum Hereon GmbH
Original Assignee
Helmholtz Zentrum Geesthacht Zentrum fuer Material und Kustenforschung 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 Helmholtz Zentrum Geesthacht Zentrum fuer Material und Kustenforschung GmbH filed Critical Helmholtz Zentrum Geesthacht Zentrum fuer Material und Kustenforschung GmbH
Priority to EP20100175241 priority Critical patent/EP2426228B1/fr
Publication of EP2426228A1 publication Critical patent/EP2426228A1/fr
Application granted granted Critical
Publication of EP2426228B1 publication Critical patent/EP2426228B1/fr
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
    • C22C23/00—Alloys based on magnesium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C22C23/04—Alloys based on magnesium with zinc or cadmium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent

Definitions

  • the present invention relates to a magnesium alloy, in particular a Magnesiumknetlegtechnik with improved ductility.
  • Magnesium sheets are of particular importance for structural applications because they offer properties such as light weight, high specific strength and good castability.
  • magnesium wrought alloys have been increasingly used for the production of sheet because they have superior mechanical properties compared to cast alloys.
  • Magnesium wrought alloys have great potential for use as engineering components in the automotive industry and in some aerospace applications.
  • the WO 2009/147861 A1 discloses a method for producing magnesium alloy sheets by hot rolling.
  • the alloys can also contain aluminum, manganese and zirconium.
  • the in the WO 2010/041791 A1 describes sheets of magnesium alloys containing zinc and yttrium.
  • the CN 101 603 138 A discloses magnesium alloys containing zinc, yttrium and zirconium. Jin Zengli et al. 29, No. 7, 2009, pages 656-659. "Effects of Y content on microstructure and properties of Mg-Y-Zn-Zr alloy" Special Castin & Nonferrous Alloys, Vol. 29, No.
  • magnesium sheets are first produced from blanks (eg slabs or cast rolled strip) of a magnesium alloy by means of a massive forming process such as a rolling process. These magnesium sheets are then formed into a component.
  • a significant problem in the sheet metal forming of magnesium sheet semis is their limited formability.
  • Hot forming processes, with which currently known magnesium sheet metal semi-finished products can be processed into one component, are technically more complicated and cost-intensive than cold forming processes and therefore economically undesirable.
  • the object of the present invention is therefore to provide a magnesium sheet semifinished product which can also be processed by means of cold forming or requires low temperatures for the shaping step, ie has better cold workability.
  • the object is achieved by the use of a magnesium alloy in a massive forming process, wherein the magnesium alloy based on the total weight of the sheet contains the following constituents: 0.4 to 1.2 wt.% Zinc, 0.2 to 1.5 wt.% Yttrium, 0 to 0.8 wt.% Of zirconium and magnesium as balance, with aluminum present in no more than impurity amounts of 0.001 wt.%.
  • the proportion of zinc is 0.8 to 1.2 wt.%, Wherein the alloy is substantially free of aluminum.
  • the proportion of yttrium is 0.2 to 0.7 wt.%.
  • the proportion of zirconium is preferably 0 to 0.5% by weight.
  • the magnesium sheet semifinished products according to the invention have an improved cold forming behavior in comparison to known magnesium sheet semifinished products.
  • the magnesium sheet metal semi-finished products according to the invention are preferably produced by rolling. They may be for a rolling process in the form of cast slabs or as a rolled thin strip.
  • the alloys of the invention may additionally contain one or more alloying elements selected from the group consisting of gadolinium (Gd), neodymium (Nd), scandium (Sc) and dysprosium (Dy).
  • Rolling is a massive forming process in which a material is deformed between two rolls at elevated temperature or at room temperature. The shape of the material is changed so that it decreases in thickness and is pulled in length. This process is multi-level and accompanied by intermediate anneals to prevent the temperature of the workpiece from dropping too much.
  • sheet metal production in optimal form is currently possible only at elevated temperature.
  • microstructural processes take place; the material recrystallizes. During recrystallization, the structure of the material is changed, usually re-formed. Depending on the characteristics of the recrystallization mechanisms, new sheet metal structures are created, which are characterized by the so-called sheet metal texture. In the case of the present invention, homogeneous and fine-grained microstructures having a weak texture are obtained. On the one hand, this combination enables good mechanical properties and, on the other hand, improved ductility.
  • the alloys according to the invention are suitable for the production of components by sheet metal forming.
  • the sheet metal forming processes are cold forming processes.
  • the components produced by sheet metal forming may preferably be used in the manufacture of automobiles, ships and / or aircraft.
  • the alloys ZW10 and ZWK100 according to the invention differ from the known alloys ZE10 and ZWK100 in that the alloying element cerium is replaced as completely as possible by yttrium.
  • the mechanical properties of tensile tests of the respective semi-finished products produced from the alloys are shown in Table 2. The properties are shown as a function of the examined orientation in the rolling direction (WR), 45 ° direction to the rolling direction (45 °) and transverse direction.
  • the sheets were rolled continuously with a degree of deformation of 0.3 per rolling step and heated to 400 ° C between two rolling steps in an oven. After rolling, the sheets were heated at 400 ° C for 30 minutes.
  • the yield strength (R p02 ) and the strength (R m ) decrease from the rolling direction (WR) to the transverse direction (QR).
  • the elongation at break of the alloys according to the invention is markedly improved in comparison with the known alloys. While the known alloys show a significant drop in the elongation at break from the rolling direction to the transverse direction, the elongation at break of the alloys according to the invention is surprisingly almost constant.
  • the alloys according to the invention have a comparatively homogeneous and fine-grained microstructure with a weak texture and can be cold-worked at room temperature, e.g. rolled at room temperature.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Forging (AREA)
  • Metal Rolling (AREA)

Claims (6)

  1. Utilisation d'un alliage de magnésium dans un procédé de formage en masse, lequel alliage de magnésium contient les constituants suivants, en pourcentages rapportés au poids total de l'alliage :
    de 0,4 à 1,2 % en poids de zinc,
    de 0,2 à 1,5 % en poids d'yttrium,
    de 0 à 0,8 % en poids de zirconium,
    et le complément de magnésium,
    étant entendu qu'il n'y a d'aluminium qu'en une quantité qui en fait une impureté, soit pas plus de 0,001 % en poids.
  2. Utilisation d'un alliage de magnésium conforme à la revendication 1, caractérisée en ce que la proportion de zinc vaut de 0,8 à 1,2 % en poids.
  3. Utilisation d'un alliage de magnésium conforme à l'une des revendications précédentes, caractérisée en ce que la proportion d'yttrium vaut de 0,2 à 0,7 % en poids.
  4. Utilisation d'un alliage de magnésium conforme à l'une des revendications précédentes, caractérisée en ce que la proportion de zirconium vaut de 0 à 0,5 % en poids.
  5. Utilisation d'un alliage de magnésium conforme à l'une des revendications 1 à 4 pour la fabrication de produits semi-finis en magnésium.
  6. Utilisation conforme à l'une des revendications précédentes, caractérisée en ce que le procédé de formage en masse est un procédé de laminage.
EP20100175241 2010-09-03 2010-09-03 Demi-produits de tôle de magnésium ayant une capacité de formage à froid améliorée Not-in-force EP2426228B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20100175241 EP2426228B1 (fr) 2010-09-03 2010-09-03 Demi-produits de tôle de magnésium ayant une capacité de formage à froid améliorée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100175241 EP2426228B1 (fr) 2010-09-03 2010-09-03 Demi-produits de tôle de magnésium ayant une capacité de formage à froid améliorée

Publications (2)

Publication Number Publication Date
EP2426228A1 EP2426228A1 (fr) 2012-03-07
EP2426228B1 true EP2426228B1 (fr) 2015-05-20

Family

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EP20100175241 Not-in-force EP2426228B1 (fr) 2010-09-03 2010-09-03 Demi-produits de tôle de magnésium ayant une capacité de formage à froid améliorée

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EP (1) EP2426228B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2839047B1 (fr) * 2012-04-18 2016-01-13 Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH Calcium comme substitut d'éléments de terres rares dans les alliages de tôle de magnésium ayant de bonnes propriétés de déformation

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100509648B1 (ko) 2003-05-23 2005-08-24 연우인더스트리(주) 성형성이 우수한 마그네슘합금 및 이를 이용한마그네슘합금 제품의 제조방법
US20060198869A1 (en) * 2005-03-03 2006-09-07 Icon Medical Corp. Bioabsorable medical devices
CN100340688C (zh) * 2005-12-12 2007-10-03 西安理工大学 原位合成准晶及近似相增强高强超韧镁合金及制备方法
CN101347639A (zh) * 2007-07-20 2009-01-21 中国科学院金属研究所 医用镁合金/磷酸钙复合材料
JP5467294B2 (ja) * 2008-06-05 2014-04-09 独立行政法人産業技術総合研究所 易成形性マグネシウム合金板材及びその作製方法
KR20100038809A (ko) * 2008-10-06 2010-04-15 포항공과대학교 산학협력단 고성형성 마그네슘 합금 판재 및 그 제조방법
CN101381833A (zh) * 2008-10-23 2009-03-11 上海交通大学 耐热铸造镁合金及其制备方法
CN101603138B (zh) * 2009-07-08 2012-05-30 西北工业大学 一种含准晶增强相的高阻尼镁合金

Also Published As

Publication number Publication date
EP2426228A1 (fr) 2012-03-07

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