EP2492365B1 - Feuerfeste magnesiumlegierung mit hervorragenden mechanischen eigenschaften und herstellungsverfahren dafür - Google Patents

Feuerfeste magnesiumlegierung mit hervorragenden mechanischen eigenschaften und herstellungsverfahren dafür Download PDF

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EP2492365B1
EP2492365B1 EP11830869.1A EP11830869A EP2492365B1 EP 2492365 B1 EP2492365 B1 EP 2492365B1 EP 11830869 A EP11830869 A EP 11830869A EP 2492365 B1 EP2492365 B1 EP 2492365B1
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Prior art keywords
magnesium alloy
casting
alloy
molten metal
raw materials
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French (fr)
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EP2492365A4 (de
EP2492365A2 (de
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Young Min Kim
Ha Sik Kim
Bong Sun You
Chang Dong Yim
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Korea Institute of Machinery and Materials KIMM
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Korea Institute of Machinery and Materials KIMM
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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
    • 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
    • B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
    • B22D21/04—Casting aluminium or magnesium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/03—Making non-ferrous alloys by melting using master alloys
    • 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
    • C22C23/02—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
    • C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent
    • 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
    • C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon

Definitions

  • the present invention relates to a magnesium alloy having excellent ignition resistance or nonflammability, and more particularly, to a magnesium alloy that can be melted and cast in the air as well as in a common inert atmosphere due to the presence of a stable protective film formed on the surface of the molten metal, has excellent ignition resistance or nonflammability in order to prevent spontaneous ignition of chips, and is excellent in both strength and ductility.
  • Magnesium alloys which have a high specific strength, are the lightest of alloys, are applicable in a variety of casting and machining processes, and have a wide range of application, and are thereby used in almost all fields in which light weight is required, such as parts for vehicles and electronic parts.
  • magnesium (Mg) is a metallic element that has a low electrochemical potential and is very active. Mg still has limitations in terms of the stability and reliability of the material, since it undergoes a strong reaction when it comes into contact with oxygen or water, and sometimes causes fires. Therefore, the fields in which Mg can be applied are still limited compared to its potential applicability. In particular, it cannot be used in applications in which safety is important.
  • an inert mixture gas such as a flux or CO 2 + SF 6 .
  • the flux that is used in melting and refining is a chlorinated substance, there is a problem in that chlorine atoms reside inside a material, thereby significantly decreasing corrosion resistance when the conditions for processing the molten metal are not fulfilled.
  • it is effective to perform melting and casting in an atmosphere in which SF 6 , CO 2 and air are mixed, instead of using the flux.
  • SF 6 is classified as a greenhouse gas, the global-warming potential (GWP) of which is 24 times that of CO 2 , so that the use thereof is expected to be regulated in the future time.
  • GWP global-warming potential
  • WO 2006/075814 A1 relates to a wrought magnesium alloy comprising lanthanides (Group IIIa and Group IIIb) as an essential element that improves ductility and anisotropy and provides a wrought magnesium alloy which contains the intermetallic compound coherent to a matrix microstructure and which has a second phase composite microstructure, thereby improving elongation and anisotropy to assure excellent formability and corrosion resistance.
  • WO 2006/075814 A1 is intended to solve the problem of greatly improving the moldability and corrosion resistance of magnesium alloys, but does not teach the description of a magnesium alloy having excellent ignition resistance and tensile properties at the same time.
  • JP 2010 036221 A relates to a flame-retardant magnesium alloy filler metal for obtaining high weld joint strength and preventing fume generation and further improving welding environment, which is composed of a flame-retardant magnesium alloy containing calcium as a base element.
  • An object of the teaching of this document is to improve the welding environment by preventing the generation of fumes that become solid fine particles by cooling the material evaporated by heat during welding.
  • This document teaches the flame-retardant magnesium alloy filler metal for obtaining high weld joint strength, which is composed of a flame-retardant magnesium alloy containing 0.5-5.0 mass% of calcium as a base element and one or more element chosen from boron (B), titanium (Ti), yttrium (Y), and zirconium as an additional additive (see Abstract of JP 2010 036221 A ).
  • JP 2010 036221 A also teaches that the flame-retardant magnesium alloy filler metal is a magnesium alloy containing 0 to 12.0 wt% of aluminum, 0 to 5.0 wt% of zinc, and 0.5 wt% or less of manganese (see para [0018] of JP 2010 036221 A ). However, JP 2010 036221 A does not teach that the ignition resistance of yttrium (Y) and its associated effects at all. JP 2010 036221 A provides the flame-retardant magnesium alloy filler metal having high weld joint strength and prevention of fume generation, but does not imply or teach the magnesium alloy having excellent ignition resistance and tensile properties at the same time.
  • Y yttrium
  • an object of the present invention is to provide a magnesium alloy that is intended to solve the foregoing problem of the related art.
  • an object of the present invention is to provide a magnesium alloy that contains Ca therein, and more particularly, has excellent ignition resistance and excellent tensile properties.
  • an object of the present invention is to provide a magnesium alloy that enables an environment-friendly manufacturing process, which uses a minimum amount of Ca and does not use a protective gas such as SF 6 , which is an environmental pollutant.
  • the content of the Ca range, by weight, from 0.2% to 1.5%.
  • the content of the Y range, by weight, from 0.1% to 1.5%.
  • the contents of the Ca and the Y range from 0.3% to 2.0% of a total weight of the magnesium alloy.
  • the step of adding the raw materials of Ca and Y into the magnesium alloy molten metal include the step of adding the raw materials of Ca and Y at a temperature higher than 800°C.
  • a master alloy ingot which contains Mg, Al, Zn, Ca and Y, is soluble at 750°C or lower, and is input into the magnesium alloy molten metal at a temperature lower than 750°C.
  • the step of inputting the raw materials of Ca and Y, the master alloy ingot, which contains Mg, Al, Zn, Ca and Y, or the Ca compound and the Y compound into the magnesium alloy molten metal further include the step of periodically stirring the magnesium alloy molten metal.
  • the casting method be one selected from the group consisting of mold casting, sand casting, gravity casting, squeeze casting, continuous casting, strip casting, die casting, precision casting, lost foam casting, spray casting, and semi-solid casting.
  • the method further include the step of carrying out hot working on the magnesium alloy cast material produced by the casting method.
  • Al is an element that increases the strength, flowability and solidification range of a magnesium alloy, thereby improving castability.
  • the fraction of the eutectic phase increases in response to an increase in the content of Al that is added.
  • the ignition resistance increases in response to an increase in the content of Al when Al is added in combination with other alloying elements.
  • the content of Al is less than 1wt%, the effect of the increased strength and ignition resistance does not occur, and when the content of Al is equal to or greater than 7wt%, tensile properties are degraded due to a coarse Mg 17 Al 12 eutectic phase. Therefore, it is preferred that Al is contained in the range equal to or greater than 1wt% and less than 7wt%.
  • Ca improves the strength and thermal resistance properties of a Mg-Al-based alloy by forming an intermetallic compound as well as reducing the oxidation of a molten metal by forming a thin and dense oxide layer of CaO on the surface of the molten metal, thereby improving the ignition resistance of the Mg alloy.
  • the content of Ca is less than 0.05wt%, the effect of the improved ignition resistance is not significant.
  • the content of Ca is greater than 2wt%, the castability of the molten metal decreases, hot cracking occurs, die sticking increases, and elongation significantly decreases, which are problematic. Therefore, in the Mg alloy of the present invention, Ca is added in an amount ranging from 0.2wt% to 2.0wt%, and more preferably from 0.2wt% to 1.5wt%.
  • Y is generally used as an element that increases high-temperature creep resistance due to precipitation strengthening, since it has a high solubility limit.
  • Y is added in combination with Ca to the magnesium alloy, the fraction of the coarse Ca-containing eutectic phase decreases.
  • AI2Y particles which form microscopic grains of a cast material, are formed, thereby improving tensile properties.
  • an oxide layer of Y 2 O 3 is formed on the surface of a molten metal to form a mixed layer with MgO and CaO, thereby increasing ignition resistance.
  • Y is contained in an amount of less than 0.05wt% in the Mg alloy, the increase in the ignition temperature is not significant.
  • Y is included in an amount ranging from 0.05wt% to 2.0wt%, and more preferably from 0.1wt% to 1.5wt%.
  • Zn has an effect of refining grains and increasing strength when added together with Al.
  • the maximum solubility limit of Zn in the Mg alloy is 6.2wt%.
  • Mn improves corrosion resistance due to its bonding with Fe, which is an impurity element that impedes corrosion resistance, and increases strength by forming an Al-Mn intermetallic compound at a rapid cooling speed.
  • Fe an impurity element that impedes corrosion resistance
  • Mn is included in an amount greater than 0% and equal to or less than 1.0wt%.
  • Zr is generally added for the purpose of micronization of grains due to the nonhomogeneous nucleation of Mg crystals in primary Zr because the primary Zr, the crystal lattice of which is very similar to Mg crystals, is created during solidification when Zr is added to a Mg alloy that does not contains some elements, such as Al and Mn.
  • Zr is added in an amount less than 0.1wt%, its effect is not sufficient.
  • Zr is added in an amount that is greater than 1.0wt%, elongation decreases due to the formation of the coarse primary Zr. Therefore, it is preferred that Zr be added in an amount ranging from 0.1wt% to 1.0wt%.
  • the Mg alloy of the present invention may contain impurities that are unavoidably mixed from raw materials thereof or during the process of manufacture.
  • impurities that can be contained in the Mg alloy of the invention iron (Fe), silicon (Si) and nickel (Ni) are components that particularly worsen the corrosion resistance of the Mg alloy. Therefore, it is preferred that the content of Fe be maintained at 0.004wt% or less, the content of Si be maintained at 0.04wt% or less, and the content of Ni be maintained at 0.001wt% or less.
  • the total content of Ca and Y that are added is in the range from 0.2wt% to 2.0wt%.
  • the Mg alloy according to the invention forms a dense composite oxide layer that acts as a protective film.
  • the Mg alloy has very excellent oxidation and ignition resistance, can be melted, cast and machined in the air or a common inert atmosphere (Ar or N 2 ), and can reduce the spontaneous ignition of chips that are accumulated during the process of machining.
  • the Mg alloy according to the invention is adapted to reduce costs, protect the health of workers, and prevent environmental pollution since it does not use a protective gas such as SF 6 .
  • the Mg alloy according to the invention is applicable as a material for structural components, since its ignition resistance is superior to that of common alloys, with the ignition temperature thereof being 50°C higher than the melting point thereof, and it also has excellent strength and ductility.
  • the Mg alloy according to the invention can be variously used as a processing material or a cast material, and in particular, can be manufactured as an extruded material, a sheet material, a forged material, a cast material, and the like, which can be practically applied to next-generation vehicles, high-speed rail systems, and the like, in which high-strength, high-elongation and safety characteristics are required.
  • the inventors of the invention found that, when Ca and Y are added in combination to a Mg-Al-based alloy or a Mg-AI-Zn-based alloy, as presented in Table 1 below, the fraction of a hard eutectic phase (eutectic phase I) significantly decreases compared to the case in which Ca is added alone, and at the same time, the formation of a AI2Y phase, i.e. particles that form micronized grains, is induced, so that not only ignition resistance but also tensile strength can be improved.
  • eutectic phase I a hard eutectic phase
  • the inventors of the invention manufactured Mg alloys having a variety of compositions based on the above data.
  • the method of manufacturing a Mg alloy according to an exemplary embodiment of the invention is as follows.
  • Mg alloy cast materials having the alloy compositions described in inventive examples 1 and 4 and reference examples 2, 3 and 5-17 and comparative example 1 to comparative example 9 in Table 2 below were formed from the raw materials using a gravity casting method. Specifically, the temperature of a molten metal was increased up to a temperature between 850°C and 900°C, so that these elements were completely melted, in order to produce an alloy by directly inputting Ca and Y, which have high melting points of 842°C and 1525°C, respectively, into the molten metal. After that, the molten metal was gradually cooled down to a casting temperature, and then the Mg alloy cast materials were produced by casting the molten metal.
  • a Mg alloy by a variety of methods in addition to the method in which casting is performed after a molten metal is formed by simultaneously melting raw materials including Mg (99.9%), Al (99.9%), Zn (99.99%), Ca (99.9%) and Y (99.9%).
  • a Mg alloy cast material by preparing a Mg, Al, Zn, Ca and Y alloy (master alloy ingot) of which the contents of Ca and Y are higher than final target values, forming a Mg alloy molten metal using raw materials of Mg, Al and Zn or alloys thereof, and then inputting the master alloy ingot into the Mg alloy molten metal.
  • This method is particularly advantageous in that the master alloy ingot can be input at a temperature that is lower than the temperature at which the raw materials of Ca and Y are directly input into the Mg alloy molten metal, since the melting point of the master alloy ingot is lower than those of the raw materials of Ca and Y.
  • the formation of a Mg alloy according to the invention can be realized by a variety of methods, and all methods of forming a Mg alloy that are well-known in the art to which the invention belongs are included as part of the invention.
  • a graphite crucible was used for induction melting, and a mixture gas of SF 6 and CO 2 was applied on the upper portion of the molten metal, so that the molten metal did not come into contact with the air, in order to prevent the molten metal from being oxidized before the alloying process was finished.
  • mold casting was performed using a steel mold without a protective gas.
  • a sheet-shaped cast material having a width of 100mm, a length of 150mm and a thickness of 15mm was manufactured for a rolling test, a cylindrical billet having a diameter of 80mm and a length of 150mm was manufactured for an extrusion test, and a cylindrical billet having a diameter of 55mm and a length of 100mm was manufactured for an ignition test of the alloy cast material.
  • the Mg alloy was cast by a mold casting method in this embodiment, a variety of casting methods, such as sand casting, gravity casting, squeeze casting, continuous casting, strip casting, die casting, precision casting, spray casting, semi-solid casting, and the like, may also be used.
  • the Mg alloy according to the invention is not necessarily limited to a specific casting method, fusion casting is more preferable.
  • the slabs that were prepared above were subjected to homogenization heat treatment at 400°C for 15 hours.
  • the materials of comparative example 1 to comparative example 6 and example 1 to example 7 in Table 2, which were subjected to homogenization heat treatment were machined into sheet materials having a final thickness of 1mm via hot working, in which the respective materials were rolled under conditions of a roll temperature of 200°C, a roll diameter of 210mm, a roll speed of 5.74mpm, and reduction ratios of each roll of 30%/pass and 72%/pass.
  • the reduction ratio of each roll was 30%/pass, rolling was performed a total of 7 times until the final thickness of 1mm was realized.
  • rod-shaped extruded materials having a final diameter of 16mm were manufactured by extruding the materials that were subjected to homogenization heat treatment under conditions including an extrusion speed of 5m/min, an extrusion ratio of 25:1, and an extrusion temperature of 250.
  • the extruded materials had a good surface state.
  • the materials may be manufactured by a variety of machining methods, such as forging and drawing, without being necessarily limited to a specific machining method.
  • chips having a predetermined size were produced by machining the outer portion of the cylindrical billets, which were manufactured above, in conditions including a depth of 0.5mm, a pitch of 0.1mm, and a constant speed of 350rpm.
  • 0.1g chips that were produced by the foregoing method were heated by loading them at a constant speed into a heating furnace, which was maintained at 1000°C.
  • the temperatures at which a sudden rise in temperature begins during this process were determined as ignition temperatures, as shown in FIG. 3 , and the results are presented in Table 2.
  • Table 2 presents that the Mg alloy according to inventive example 1 has a very high ignition temperature of 807°C. This is because Y has a very high content of 1wt%. Thus, it can be appreciated that ignition resistance can significantly increase in response to an increase in the content of Y that is added. Furthermore, in Table 2, the Mg alloy according to reference example 8 has a very high ignition resistance of 811°C. This shows that the ignition temperature of the Mg alloy, in which 6wt% of Zn is added, significantly increases when Ca and Y are added respectively in an amount of 1wt%.
  • the sheet materials which were manufactured by the above-described method, were heat-treated at 250°C for 30 minutes, and then sub-size sheet-shaped samples according to the ASTM-E-8M standard, in which the length of a gauge was 25mm, were produced.
  • a tensile test was carried out at room temperature under a strain of 1 ⁇ 10 -3 s -1 using a common tensile tester, and the results are presented in Table 3.
  • the ignition resistance was greatly increased and that the tensile properties, particularly the value of tensile strength ⁇ uniform elongation, were greatly increased when 1wt% of Ca and 1wt% of Y were added to the Mg-6Zn-1Al alloy. That is, due to the addition of a small amount of Y, it was possible to produce a Mg alloy of this embodiment in which the content of Ca was maintained low, on the order of 1wt%, but in which the fraction of the coarse and hard ternary eutectic phase was greatly decreased, such that both strength and elongation were improved.
  • reference example 2 and reference example 5 contain the same content of Ca that was added in relation to the addition of Y, and have ignition resistance that is superior to that of the case in which Y was not added. At the same time, the value of tensile strength ⁇ uniform elongation is further increased.
  • FIG. 7 and FIG. 8 show variations in the ignition temperature and tensile properties thereof in response to the total amount of Ca and Y that was added.
  • the ignition temperature tends to gradually increase in response to an increase in the total amount of Ca and Y that was added.
  • the slope of the increase in the ignition temperature is further increased when Y is added than when Y is not added.
  • the value of tensile strength ⁇ uniform elongation tends to greatly decrease in response to an increase in the content of Ca that is added, irrespective of the type of hot working.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
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  • Crystallography & Structural Chemistry (AREA)
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  • Hard Magnetic Materials (AREA)

Claims (12)

  1. Eine Magnesiumlegierung, die durch ein Schmelzgießen hergestellt wird, wobei die Magnesiumlegierung gewichtsmäßig 1% oder mehr, aber weniger als 7,0% Al, 0,2% bis 2,0% Ca, 0,05% bis 2,0% Y, mehr als 0% bis 6% Zn, mehr als 0% bis 1% Mn, optional 0,1% bis 1,0% Zr, einen Ausgleich an Mg und andere unvermeidbare Verunreinigungen aufweist,
    wobei ein Gesamtgehalt des Ca und Y gleich oder größer als 0,2%, aber geringer als oder gleich 2,0% des Gesamtgewichts der Magnesiumlegierung ist und
    wobei eine kombinierte Oxidschicht aus CaO/Y2O3 auf der Oberfläche der Magnesiumlegierung gebildet ist.
  2. Die Magnesiumlegierung nach Anspruch 1, wobei sich ein Gehalt des Ca gewichtsmäßig von 0,2% bis 1,5% bewegt.
  3. Die Magnesiumlegierung nach Anspruch 1, wobei sich ein Gehalt des Y gewichtsmäßig von 0,1% bis 1,5% bewegt.
  4. Die Magnesiumlegierung nach einem der Ansprüche 1 bis 3, wobei sich Gehalte des Ca und des Y von 0,3% bis 2,0% eines Gesamtgewichts der Magnesiumlegierung bewegen.
  5. Ein Verfahren zum Herstellen einer Magnesiumlegierung, umfassend:
    Bilden eines geschmolzenen Metalls aus einer Magnesiumlegierung, die Mg, Al und Zn enthält;
    Zufügen von Rohmaterialien aus Ca und Y in das geschmolzene Metall aus einer Magnesiumlegierung;
    Erzeugen eines Gussmaterials aus einer Magnesiumlegierung aus dem geschmolzenen Metall einer Magnesiumlegierung, in das die Rohmaterialien aus Ca und Y hinzugefügt sind, unter Verwendung eines Schmelzgussverfahrens,
    wobei eine Magnesiumlegierung, die durch das obige Verfahren hergestellt ist, gewichtsmäßig 1% oder mehr, aber weniger als 7,0% Al, 0,2% bis 2,0% Ca, 0,05% bis 2,0% Y, mehr als 0% bis 6% Zn, mehr als 0% bis 1% Mn, optional 0,1% bis 1,0% Zr, einen Ausgleich an Mg und andere unvermeidbare Verunreinigungen aufweist,
    wobei ein Gesamtgehalt des Ca und Y gleich oder größer als 0,2%, aber geringer als oder gleich 2,0% des Gesamtgewichts der Magnesiumlegierung ist und
    wobei eine kombinierte Oxidschicht aus CaO/Y2O3 auf der Oberfläche der Magnesiumlegierung gebildet ist.
  6. Das Verfahren nach Anspruch 5, wobei das Zufügen der Rohmaterialien aus Ca und Y in das geschmolzene Metall aus einer Magnesiumlegierung ein Zufügen der Rohmaterialien aus Ca und Y bei einer höheren Temperatur als 800°C umfasst.
  7. Das Verfahren nach Anspruch 5, wobei das Zufügen der Rohmaterialien aus Ca und Y ein Bilden eines Masterlegierungsblocks umfasst, der Mg, Al, Zn, Ca und Y enthält und bei 750°C oder weniger löslich ist.
  8. Das Verfahren nach Anspruch 7, wobei der Masterlegierungsblock, der Mg, Al, Zn, Ca und Y enthält, bei 750°C oder weniger löslich ist und bei einer Temperatur unterhalb von 750°C in das geschmolzene Metall aus einer Magnesiumlegierung eingebracht wird.
  9. Das Verfahren nach Anspruch 5, wobei das Rohmaterial aus Ca eine Ca-Verbindung ist und das Rohmaterial aus Y eine Y-Verbindung ist.
  10. Das Verfahren nach einem der Ansprüche 5 bis 9, wobei das Einfügen der Rohmaterialien aus Ca und Y, des Masterlegierungsblocks, der Mg, Al, Zn, Ca und Y enthält, oder der Ca-Verbindung und der Y-Verbindung in das geschmolzene Metall aus einer Magnesiumlegierung weiterhin ein periodisches Rühren des geschmolzenen Metalls aus einer Magnesiumlegierung umfasst.
  11. Das Verfahren nach einem der Ansprüche 5 bis 9, wobei das Gießverfahren eines umfasst, das aus der Gruppe ausgewählt ist, die aus Formgießen, Sandgießen, Schwerkraftgießen, Squeezegießen, Stranggießen, Stripgießen, Spritzgießen, Präzisionsgießen, Vollformgießen, Spraygießen und Semi-Solid-Gießen besteht.
  12. Das Verfahren nach einem der Ansprüche 5 bis 9, weiter umfassend ein Durchführen eines Warmbearbeitens des Gussmaterials aus einer Magnesiumlegierung, das durch das Gießverfahren hergestellt ist.
EP11830869.1A 2010-10-05 2011-10-04 Feuerfeste magnesiumlegierung mit hervorragenden mechanischen eigenschaften und herstellungsverfahren dafür Active EP2492365B1 (de)

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KR20100096709 2010-10-05
KR1020110023260A KR101066536B1 (ko) 2010-10-05 2011-03-16 기계적 특성이 우수한 난연성 마그네슘 합금 및 그 제조방법
PCT/KR2011/007298 WO2012046984A2 (ko) 2010-10-05 2011-10-04 기계적 특성이 우수한 난연성 마그네슘 합금 및 그 제조방법

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EP2492365A2 EP2492365A2 (de) 2012-08-29
EP2492365A4 EP2492365A4 (de) 2017-12-20
EP2492365B1 true EP2492365B1 (de) 2019-12-11

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US (1) US20130183193A1 (de)
EP (1) EP2492365B1 (de)
JP (1) JP5852580B2 (de)
KR (1) KR101066536B1 (de)
CN (1) CN102712969B (de)
CA (1) CA2781995A1 (de)
WO (1) WO2012046984A2 (de)

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KR101223045B1 (ko) * 2011-12-29 2013-01-17 한국기계연구원 마그네슘 비활성화제 및 마그네슘 비활성화제를 이용한 마그네슘 합금의 제조방법
JP6432344B2 (ja) * 2012-04-19 2018-12-05 国立大学法人 熊本大学 マグネシウム合金及びその製造方法
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JP2013512338A (ja) 2013-04-11
CN102712969B (zh) 2015-06-17
WO2012046984A3 (ko) 2012-06-21
EP2492365A4 (de) 2017-12-20
WO2012046984A2 (ko) 2012-04-12
CN102712969A (zh) 2012-10-03
EP2492365A2 (de) 2012-08-29
JP5852580B2 (ja) 2016-02-03
CA2781995A1 (en) 2012-04-12
KR101066536B1 (ko) 2011-09-21

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