EP2116622A1 - Duktile Magnesiumlegierung - Google Patents

Duktile Magnesiumlegierung Download PDF

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Publication number
EP2116622A1
EP2116622A1 EP09158338A EP09158338A EP2116622A1 EP 2116622 A1 EP2116622 A1 EP 2116622A1 EP 09158338 A EP09158338 A EP 09158338A EP 09158338 A EP09158338 A EP 09158338A EP 2116622 A1 EP2116622 A1 EP 2116622A1
Authority
EP
European Patent Office
Prior art keywords
magnesium alloy
magnesium
content
weight
total weight
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
EP09158338A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2116622B1 (de
Inventor
Carsten Blawert
Karl Ulrich Kainer
Wolfgang Dietzel
André DITZE
Christiane Scharf
Predrag Zivanovic
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 Geesthacht Zentrum fuer Material und Kustenforschung GmbH
Original Assignee
GKSS Forshungszentrum Geesthacht 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 GKSS Forshungszentrum Geesthacht GmbH filed Critical GKSS Forshungszentrum Geesthacht GmbH
Publication of EP2116622A1 publication Critical patent/EP2116622A1/de
Application granted granted Critical
Publication of EP2116622B1 publication Critical patent/EP2116622B1/de
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
    • C22C23/02—Alloys based on magnesium with aluminium 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
    • C22C23/04—Alloys based on magnesium with zinc or cadmium as the next major constituent

Definitions

  • the present invention relates to a corrosion resistant magnesium alloy.
  • magnesium alloys are corrosion resistant when the levels of copper, iron and nickel are very low.
  • the tolerance limits are usually 250 ppm copper, 10 ppm nickel and 50 ppm iron.
  • Magnesium secondary alloys can be produced with much less energy than primary alloys, but inevitably contain copper, nickel and iron in amounts above the tolerance limits. Magnesium alloys containing copper, nickel and / or iron below tolerance levels can not or only at very high cost be made by recycling scrap.
  • a corrosion resistant magnesium secondary alloy is, however, from the WO 2007/009435 A1 known. The in the WO 2007/009435 A1 In spite of higher contents of copper and nickel, disclosed magnesium alloys show comparable or better corrosion properties than a high purity magnesium primary alloy, and contain 10-20% by weight of aluminum, 2.5 to 10% by weight of zinc, 0.1 to 2% by weight.
  • the object of the present invention is therefore to provide a corrosion-resistant magnesium alloy which can be produced without recycling very high energy expenditure by recycling scrap and which is ductile.
  • This object is achieved by a magnesium alloy containing, based on the total weight of the magnesium alloy, 1 to 9 wt .-% aluminum, 0.6 to 6 wt .-% zinc, 0.1 to 2 wt .-% manganese, 0 to 2 wt .-% rare earth elements, 0.5 to 2 wt .-% copper, wherein the ratio of weight percentages of aluminum to zinc in the range of 1: 1 to 2: 1.
  • Preferred embodiments will be apparent from the dependent claims.
  • the Korsorions is similar despite high levels of copper in the magnesium alloy according to the invention compared to high-purity magnesium primary alloys. Furthermore, the magnesium alloy according to the invention remains ductile.
  • the aluminum content of the magnesium alloy of the present invention is preferably 2 to 7.5% by weight, more preferably 3 to 6% by weight, based on the total weight of the magnesium alloy.
  • the zinc content of the magnesium alloy of the present invention is preferably 1 to 5% by weight, more preferably 2 to 4% by weight, based on the total weight of the magnesium alloy.
  • the manganese content of the magnesium alloy of the present invention is preferably 0.1 to 1% by weight, more preferably 0.2 to 0.75% by weight.
  • the copper content of the magnesium alloy according to the invention is preferably 0.5 to 1 wt .-%, more preferably 0.5 to 0.7 wt .-%.
  • rare earths such as cerium, neodymium, yttrium, scandium, gadolinium or mixtures thereof.
  • the total content of rare earth elements is preferably in the range of up to 2 wt .-%, based on the total weight of the magnesium alloy.
  • the magnesium alloy according to the invention can furthermore contain nickel, iron and / or silicon. It is preferable that the content of nickel is less than 0.005% by weight based on the total weight of the magnesium alloy, more preferably less than 0.001% by weight, still more preferably less than 0.0005% by weight.
  • the iron content should be less than 0.05% by weight, based on the total weight of the magnesium alloy, more preferably less than 0.01% by weight, more preferably less than 0.005% by weight, and the content of silicon should be less than zero , 1 wt .-%, based on the total weight of the magnesium alloy, more preferably less than 0.05 wt .-%.
  • the magnesium alloy of the present invention can be produced as a secondary alloy by melting scrap or impure magnesium precursors containing copper, nickel and / or iron, and then adjusting the alloy to a content of constituents corresponding to a magnesium alloy of the present invention.
  • Such a magnesium alloy is inexpensive to produce with relatively little energy.
  • the magnesium alloy according to the invention can be used both as casting material (sand, mold, pressure and semi-solid casting) and be used as a kneading material for extrusion, forging, rolling, etc.
  • the invention will now be explained in more detail with reference to the following examples.
  • the comparative corrosion tests were carried out by immersion in 3.5% sodium chloride solution and after the salt spray test according to DIN 50021.
  • the corrosion rate was determined by measuring the amount of hydrogen evolved.
  • the salt spray test the mass loss is determined.
  • Table 1 compares the corrosion rates of a magnesium alloy (AMZC) according to the invention, a pure, zinc-containing magnesium alloy (AMZ 503), a pure AM50 alloy and a copper-modified AM50 alloy (AMC).
  • AMC copper-modified AM50 alloy
  • Table 3 shows the mechanical properties of the alloy according to the invention and the comparison alloys AMZ501, AMZ502, AMZ505 and AM50 and AZC1231 according to FIG WO 2007/009435 A1 , the remainder being always magnesium.
  • Table 1 alloy Corrosion rate salt spray test (mm / year) Corrosion rate in mersion (mm / year) AMZC 0.6 1.7 AMZ503 0.17 1.1 AM50 0.63 4.5 AMC 8.99 32.9 AZC1231 1.00 6.57 alloy al Zn Mn Cu Ni Fe Si AMZC 5.59 3.18 0.25 0.54 0.00014 0.0013 0.026 AMZ503 5.3 3.19 0.25 0.0077 0.00021 0.0015 0.028 AM50 4.9 0.02 0.26 0.0077 0.00017 0.00068 0.026 AMC 4.84 0.023 0.26 0.52 0.000082 0.00092 0.028 AZC1231 11.7 3.04 0.48 0.47 0.0032 0.0087 0.39 alloy Yield strength (MPa) Tensile strength (MPa) Elongation at break (%) AMZC 73 226 10.9 AMZ501 67 214 13.2 AMZ502 65 207 10.2 AMZ505 67 193 11.2 AM50 54 199 13.2 AZC1231
  • the data show that the corrosion rate of the magnesium alloys of the invention (AMZC) is comparable or even improved with the rate of corrosion of the pure AMZ503 and AM50 alloys.
  • the copper-modified AM50 alloy has an unacceptable rate of corrosion.
  • the microstructure of the magnesium alloy according to the invention is characterized by a low content of secondary phases and a change in the beta phase Mg 17 Al 12 .
  • the secondary phases form in contrast to those from the WO 2007/009435 A1 known alloys no network structure. This works has a positive effect on the ductility of the alloys according to the invention, as shown in Table 3.
  • the beta phase is believed to be modified by alloying with zinc and partially suppressed and replaced by quaternary MgAlZnCu phases.
  • the local element formers copper, nickel, cobalt and iron and their intermetallic phases are additionally hardened in this phase and nickel, cobalt and iron over Al 8 Mn 5 phases and their negative influence on the corrosion resistance is significantly reduced.
  • the microstructure of the pure AM50 alloy predominantly exhibits the beta phase as the secondary phase, which, without being formed as a network, rather accelerates corrosion via local element formation.
  • the alloy of the invention can therefore tolerate higher levels of copper, nickel, cobalt and iron.
  • the contents of zinc and copper increase the strength of the alloy without greatly affecting the ductility (see Table 3) and additionally make the alloy more creep resistant.
  • the magnesium alloys according to the invention can be produced with reasonable energy expenditure as secondary alloys by melting scrap or impure precursors containing copper, nickel and / or iron and subsequently adjusting the alloy to a content of constituents ,

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP09158338.5A 2008-04-23 2009-04-21 Duktile Magnesiumlegierung Not-in-force EP2116622B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008020523.0A DE102008020523B4 (de) 2008-04-23 2008-04-23 Duktile Magnesiumlegierung

Publications (2)

Publication Number Publication Date
EP2116622A1 true EP2116622A1 (de) 2009-11-11
EP2116622B1 EP2116622B1 (de) 2015-07-22

Family

ID=40886583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09158338.5A Not-in-force EP2116622B1 (de) 2008-04-23 2009-04-21 Duktile Magnesiumlegierung

Country Status (8)

Country Link
US (1) US20090269236A1 (zh)
EP (1) EP2116622B1 (zh)
JP (1) JP2009263792A (zh)
CN (1) CN101565789A (zh)
AU (1) AU2009201545B2 (zh)
CA (1) CA2662603C (zh)
DE (1) DE102008020523B4 (zh)
IL (1) IL198126A0 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112010002575B4 (de) * 2009-06-17 2018-02-22 Toyota Jidosha Kabushiki Kaisha Recycelte Magnesiumlegierung, Verfahren zur Verbesserung der Korrosionsbeständigkeit einer recycelten Magnesiumlegierung und Magnesiumlegierung
EP3438303A4 (en) * 2016-03-31 2019-02-06 Kurimoto, Ltd. DEGRADABLE MG ALLOY

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8435444B2 (en) 2009-08-26 2013-05-07 Techmag Ag Magnesium alloy
JP5595891B2 (ja) * 2010-12-17 2014-09-24 株式会社豊田中央研究所 耐熱マグネシウム合金の製造方法、耐熱マグネシウム合金鋳物およびその製造方法
CN102260811A (zh) * 2011-07-22 2011-11-30 曹金 一种镁基阻隔防爆合金材料
CN103397235B (zh) * 2013-08-16 2015-08-12 重庆大学 一种镁-铝-锌-锰-铜合金及其制备方法
CN104630474A (zh) * 2013-11-07 2015-05-20 丹阳智盛合金有限公司 一种矿热炉生产铁铬铝合金工艺
CN114277297B (zh) * 2021-12-22 2023-04-07 重庆大学 一种耐热性能提高的镁基复合材料及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2246647A1 (zh) * 1973-10-01 1975-05-02 Nl Industries Inc
GB2022138A (en) * 1978-05-31 1979-12-12 Magnesium Elektron Ltd Magnesium alloys
WO2007009435A1 (de) 2005-07-20 2007-01-25 Technische Universität Clausthal Magnesiumlegierung

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2188239A (en) * 1937-12-30 1940-01-23 Christen Fritz Magnesium alloy
US2264310A (en) * 1940-03-09 1941-12-02 Dow Chemical Co Magnesium base alloy
US2264309A (en) * 1940-03-09 1941-12-02 Dow Chemical Co Magnesium base alloy
GB723483A (en) * 1952-10-02 1955-02-09 Magnesium Elektron Ltd Improvements in or relating to the production of magnesium base alloys
US3653880A (en) * 1970-01-08 1972-04-04 Norsk Hydro As Magnesium cast alloys with little tendency to hot-crack
US4908181A (en) * 1988-03-07 1990-03-13 Allied-Signal Inc. Ingot cast magnesium alloys with improved corrosion resistance
JP2730847B2 (ja) * 1993-06-28 1998-03-25 宇部興産株式会社 高温クリープ強度に優れた鋳物用マグネシウム合金
DE10003970B4 (de) * 2000-01-25 2005-09-22 Technische Universität Clausthal Verfahren zur Herstellung von Magnesiumlegierungen mit einer superplastischen Gefügestruktur
US20050194072A1 (en) * 2004-03-04 2005-09-08 Luo Aihua A. Magnesium wrought alloy having improved extrudability and formability
DE102006057719A1 (de) * 2005-12-15 2007-07-05 Salzgitter Magnesium Technologie Gmbh Magnesiumbleche und -bänder mit ausgezeichneten Umformeigenschaften und Verfahren zu deren Herstellung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2246647A1 (zh) * 1973-10-01 1975-05-02 Nl Industries Inc
GB2022138A (en) * 1978-05-31 1979-12-12 Magnesium Elektron Ltd Magnesium alloys
WO2007009435A1 (de) 2005-07-20 2007-01-25 Technische Universität Clausthal Magnesiumlegierung

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"Magnesiumtaschenbuch, Aluminiumverlag Düsseldorf", 2000
BAKKE ET AL., SOC. AUTOMOTIVE ENGINEERS, 1999, pages 1 - 10
SCHARF CHRISTIANE ET AL: "CORROSION OF AZ 91 SECONDARY MAGNESIUM ALLOY", ADVANCED ENGINEERING MATERIALS, WILEY VCH VERLAG, WEINHEIM, DE, vol. 7, no. 12, 1 December 2005 (2005-12-01), pages 1134 - 1142, XP009072476, ISSN: 1438-1656 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112010002575B4 (de) * 2009-06-17 2018-02-22 Toyota Jidosha Kabushiki Kaisha Recycelte Magnesiumlegierung, Verfahren zur Verbesserung der Korrosionsbeständigkeit einer recycelten Magnesiumlegierung und Magnesiumlegierung
EP3438303A4 (en) * 2016-03-31 2019-02-06 Kurimoto, Ltd. DEGRADABLE MG ALLOY

Also Published As

Publication number Publication date
IL198126A0 (en) 2009-12-24
DE102008020523A1 (de) 2009-10-29
JP2009263792A (ja) 2009-11-12
CA2662603A1 (en) 2009-10-23
CA2662603C (en) 2016-02-09
CN101565789A (zh) 2009-10-28
EP2116622B1 (de) 2015-07-22
AU2009201545A1 (en) 2009-11-12
AU2009201545B2 (en) 2014-03-27
DE102008020523B4 (de) 2014-05-15
US20090269236A1 (en) 2009-10-29

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