EP2481825B1 - Magnesium alloy containing rare earth metals - Google Patents

Magnesium alloy containing rare earth metals Download PDF

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Publication number
EP2481825B1
EP2481825B1 EP11152827.9A EP11152827A EP2481825B1 EP 2481825 B1 EP2481825 B1 EP 2481825B1 EP 11152827 A EP11152827 A EP 11152827A EP 2481825 B1 EP2481825 B1 EP 2481825B1
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EP
European Patent Office
Prior art keywords
magnesium
alloys
rare earth
present
magnesium 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.)
Not-in-force
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EP11152827.9A
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German (de)
English (en)
French (fr)
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EP2481825A1 (en
Inventor
Yuanding Huang
Qiuming Peng
Norbert Hort
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 Geesthacht Zentrum fuer Material und Kustenforschung GmbH
Original Assignee
Helmholtz Zentrum Geesthacht Zentrum fuer Material und Kustenforschung GmbH
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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 ES11152827T priority Critical patent/ES2423354T3/es
Priority to EP11152827.9A priority patent/EP2481825B1/en
Priority to US13/352,595 priority patent/US20120195787A1/en
Priority to CA2765484A priority patent/CA2765484A1/en
Priority to CN201210022436.1A priority patent/CN102628134B/zh
Publication of EP2481825A1 publication Critical patent/EP2481825A1/en
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Publication of EP2481825B1 publication Critical patent/EP2481825B1/en
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    • 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 cast and wrought single-phase solid solution magnesium alloys with high mechanical properties, formability and corrosion resistance.
  • Magnesium alloys have not yet been widely accepted by car manufacturers. Most of the technical barriers preventing magnesium alloys from widespread applications arise from the low ductility and toughness at low temperatures, poor corrosion and creep resistance at high temperatures. Their present commercial products are normally fabricated by high pressure die casting. The use of wrought magnesium alloys is limited because of its poor formability and corrosion resistance.
  • Mg-Al magnesium-aluminium
  • Mg-Zn magnesium-zinc
  • WE43 magnesium-4.1Y-2.2Nd-1HRE-0.5Zr
  • WE54 magnesium-5.2Y-1.7Nd-1.7HRE-0.4Zr
  • the alloys of magnesium-aluminium series are the most commonly used in wrought applications for their relative ease of extrusion and adequate mechanical properties, but they suffer from both a pronounced asymmetry in the yield behaviour and a relatively narrow processing window. Due to the lower eutectic temperature 437°C for magnesium-aluminium alloys, the hot processing temperatures are normally selected below 350°C and the processing speeds are not so high. If selecting high temperatures more than 350°C with high processing speeds, the eutectic phases dissolve again, leading to the occurrence of hot cracking and bad surface quality of the products. In addition, until now, the methods for refining the as-cast microstructures of magnesium-aluminium alloys are not satisfying and not widely accepted by the industry.
  • magnesium-zinc series contain no aluminium, their as-cast microstructure can be effectively refined by the addition of zirconium.
  • these magnesium-zinc alloys still have very limited applications because they are susceptible to microporosity during casting.
  • the addition of zinc in magnesium increases the susceptibility to hot tearing.
  • due to the high content of zinc it was considered that these alloys are difficult to be welded.
  • AZ31 (Mg-2.9Al-0.8Zn) alloy is used in industry to an significant extent.
  • AZ31 (Mg-2.9Al-0.8Zn) alloy exhibits some problems with recrystallisation during the hot working and has insufficient mechanical and corrosion properties.
  • the present invention provides a magnesium alloy as defined in claim 1.
  • the solid solution strengthening depends on the contents of alloying elements in the matrix of magnesium and the difference in atomic radius between the alloying elements and magnesium such that a high content of alloying elements and large difference in atomic radius increase the effect of solid solution strengthening.
  • rare earth elements can purify the melt during casting.
  • the addition of rare earth elements can remove impurity elements such as hydrogen, oxygen, chlorine, etc.
  • impurity elements such as hydrogen, oxygen, chlorine, etc.
  • they interact with iron, cobalt, nickel or copper elements during melting, and these elements are removed by the formation of intermetallic compounds which settle at the bottom of the ingot.
  • the decrease of impurities in the matrix also contributes to the high corrosion resistance.
  • the magnesium alloy of the present invention further comprises an element selected from the group consisting of Zr, Ca, Zn, and mixtures thereof.
  • the stress corrosion of magnesium alloys could be alleviated by the addition of zirconium (Zr) and rare earth elements. Zirconium (Zr) can be used as an element to decrease the stress corrosion cracking.
  • the magnesium alloys according to the present invention contain no aluminium; therefore, their as-cast microstructure can effectively be refined by the addition of zirconium or calcium.
  • rare earth elements can be classified in periodic table: light rare earth elements and heavy rare earth elements.
  • rare earth elements have the similar chemical and physical properties. Due to the similar properties of yttrium and scandium to heavy rare earth elements, for the purposes of the present invention Y and Sc are treated as they were heavy rare earth elements.
  • the light rare earth elements include samarium, lanthanum, cerium, neodymium, and praseodymium, and the heavy rare earth elements include gadolinium, yttrium and dysprosium.
  • zirconium and/or calcium are preferably added as a grain refiner.
  • the total content of rare earths is maintained below 5 wt.%, mainly for economical reasons.
  • the content of grain refiner calcium and/or zirconium is preferably in the range of 0.05-0.6% by weight.
  • the manufacturing processes of the magnesium alloys according to the present invention are not restricted.
  • the alloys can be prepared by die casting, permanent casting, chill casting, semi-solid processes, continuous casting or continuous twin roll casting.
  • the magnesium alloys according to the present invention exhibit excellent room temperature ductility with a value of about 25%.
  • Table 1 lists the compositions of the investigated alloys.
  • All alloys were prepared by zone solidification. Their optical microstructures are shown in Figure 1 .
  • the average grain size decreases with the increment in the content of rare earths. Compared to the gadolinium and dysprosium, the yttrium element is the most effective element to decrease the grain size.
  • the average grain sizes of E and H alloys containing zirconium are 55 ⁇ m and 67 ⁇ m.
  • the average grain size of Mg-3Al-1Zn (AZ31 is 480 ⁇ m. Table 1.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Forging (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP11152827.9A 2011-02-01 2011-02-01 Magnesium alloy containing rare earth metals Not-in-force EP2481825B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES11152827T ES2423354T3 (es) 2011-02-01 2011-02-01 Aleación de magnesio que contiene metales de tierras raras
EP11152827.9A EP2481825B1 (en) 2011-02-01 2011-02-01 Magnesium alloy containing rare earth metals
US13/352,595 US20120195787A1 (en) 2011-02-01 2012-01-18 Single-phase solid solution cast or wrought magnesium alloys
CA2765484A CA2765484A1 (en) 2011-02-01 2012-01-25 Single-phase solid solution cast or wrought magnesium alloys
CN201210022436.1A CN102628134B (zh) 2011-02-01 2012-02-01 单相固溶铸造或锻造镁合金

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11152827.9A EP2481825B1 (en) 2011-02-01 2011-02-01 Magnesium alloy containing rare earth metals

Publications (2)

Publication Number Publication Date
EP2481825A1 EP2481825A1 (en) 2012-08-01
EP2481825B1 true EP2481825B1 (en) 2013-05-08

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EP11152827.9A Not-in-force EP2481825B1 (en) 2011-02-01 2011-02-01 Magnesium alloy containing rare earth metals

Country Status (5)

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US (1) US20120195787A1 (es)
EP (1) EP2481825B1 (es)
CN (1) CN102628134B (es)
CA (1) CA2765484A1 (es)
ES (1) ES2423354T3 (es)

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CN103820689B (zh) * 2012-11-19 2016-01-20 北京有色金属研究总院 含两系稀土的高强耐热镁合金及其制备加工方法
CN103014467A (zh) * 2012-12-20 2013-04-03 常熟市东方特种金属材料厂 一种镁-钬合金
CN103014469A (zh) * 2013-01-08 2013-04-03 哈尔滨工程大学 一种抗冲击的高强镁合金材料及制备方法
CN103060649A (zh) * 2013-01-16 2013-04-24 燕山大学 一种低温高韧性镁合金薄板
EP2987875B1 (en) * 2013-04-15 2018-10-10 National University Corporation Kumamoto University Fire-resistant magnesium alloy and production method therefor
CN104690236A (zh) * 2013-12-10 2015-06-10 陕西宏远航空锻造有限责任公司 一种控制耐热钢晶粒度的生产方法
IL230631A (en) * 2014-01-23 2016-07-31 Dead Sea Magnesium Ltd High performance creep resistant magnesium alloys
RU2554269C1 (ru) * 2014-03-03 2015-06-27 Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" (ФГУП "ВИАМ") Сплав на основе магния и изделие, выполненное из него
CN104004936A (zh) * 2014-05-21 2014-08-27 上海交通大学 一种锆细化复合低温浇注制备稀土镁合金半固态浆料的方法
CN104131204B (zh) * 2014-08-19 2017-01-25 中国科学院长春应用化学研究所 一种镁合金、镁合金复合材料及其制备方法
CN104195483B (zh) * 2014-08-19 2016-06-01 中国科学院金属研究所 一种提高Mg-Zn-Y-Zr镁合金耐腐蚀性的热处理工艺
CN104278185A (zh) * 2014-11-03 2015-01-14 北京汽车股份有限公司 一种汽车用含SiC颗粒的高强高模量稀土镁基复合材料
CN105525172A (zh) * 2014-11-13 2016-04-27 比亚迪股份有限公司 一种镁合金及其制备方法和应用
CN104630895B (zh) * 2014-12-30 2017-10-13 中国兵器科学研究院宁波分院 一种单晶镁合金生物降解材料及其制备方法
CN106148785A (zh) * 2015-04-20 2016-11-23 中国科学院金属研究所 一种室温高延展性变形镁合金及其制备方法
CN105568103A (zh) * 2016-01-04 2016-05-11 青岛工学院 一种可降解生物医用镁合金
CN106367649A (zh) * 2016-09-30 2017-02-01 肖旅 易于制备和塑性成形的镁合金及其构件制造方法
CN106399784A (zh) * 2016-10-31 2017-02-15 上海航天精密机械研究所 一种近无共晶凝固相的铸造镁合金及其铸件的制造方法
CN106591659A (zh) * 2016-12-29 2017-04-26 中国科学院长春应用化学研究所 一种高强高韧铸造稀土镁合金及其制备方法
CN107354356B (zh) * 2017-06-28 2019-12-27 中国科学院长春应用化学研究所 一种砂型铸造镁合金及其制备方法
CN107354357B (zh) * 2017-06-28 2019-10-25 中国科学院长春应用化学研究所 一种变形镁合金及其制备方法
CN107829004A (zh) * 2017-10-26 2018-03-23 安徽恒利增材制造科技有限公司 一种锌镁合金铸锭及其制备方法
CN107974599A (zh) * 2017-11-16 2018-05-01 上海航天精密机械研究所 一种低成本稀土铸造镁合金及其铸件的制造方法
CN109666832A (zh) * 2019-02-22 2019-04-23 中国科学院长春应用化学研究所 高强耐热变形镁合金及其制备方法
CN111155014B (zh) * 2020-02-08 2021-09-07 苏州轻金三维科技有限公司 一种三维打印用高强度合金及其制备方法
CN112746210B (zh) * 2021-02-01 2021-10-12 太原理工大学 一种多元微合金化镁合金及其制法和板材挤压成形工艺
CN112941385B (zh) * 2021-02-03 2022-05-20 中南大学 一种低稀土含量高疲劳性能镁合金板材及其制备方法
CN113088778B (zh) * 2021-04-02 2022-02-08 北京理工大学 一种高强高刚度镁合金及其制备方法
CN113249602B (zh) * 2021-05-28 2022-01-28 西南大学 一种耐腐蚀的铸造镁合金及其制备方法
CN113373361A (zh) * 2021-06-22 2021-09-10 河北钢研德凯科技有限公司 高强铸造镁合金及其制备方法和应用
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CN114892055B (zh) * 2022-05-25 2023-09-05 鹤壁海镁科技有限公司 一种高强韧Mg-Al-Zn镁合金及其制备方法
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Also Published As

Publication number Publication date
CN102628134B (zh) 2016-06-29
US20120195787A1 (en) 2012-08-02
EP2481825A1 (en) 2012-08-01
ES2423354T3 (es) 2013-09-19
CA2765484A1 (en) 2012-08-01
CN102628134A (zh) 2012-08-08

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