Abstract: The present invention is to provide a magnesium alloy comprising 0.001 parts by weight to 1.0 parts by weight of scandium and the balance of magnesium and unavoidable impurities, based on 100 parts by weight of a magnesium alloy, wherein the magnesium alloy has increased Fe solubility and reduced corrosion while providing excellent mechanical properties and corrosion resistance, and a method for producing the same. The magnesium alloy of the present invention can improve the corrosion resistance of the magnesium alloy by using scandium which can simultaneously prevent from microgalvanic corrosion between a substrate and impurities without deteriorating mechanical properties and improve the passivation property of the coating formed on the surface.

Abstract: A grain refiner for a magnesium alloy according to the present invention contains aluminum (Al) and manganese (Mn), and contains a compound of aluminum (Al) and manganese (Mn) in the microstructure thereof, wherein the grain refiner is composed of a structure in which, in the compound of aluminum (Al) and manganese (Mn), the area of the compound having an Al/Mn compositional (atomic) ratio of 4-4.5 is larger than the area of the compound having an Al/Mn compositional (atomic) ratio of 5.5-6.5. When the grain refiner is added to molten magnesium, crystal grains can be refined to 50-100 ?m.

Abstract: The present invention is to provide a magnesium alloy comprising 0.001 parts by weight to 1.0 parts by weight of scandium and the balance of magnesium and unavoidable impurities, based on 100 parts by weight of a magnesium alloy, wherein the magnesium alloy has increased Fe solubility and reduced corrosion while providing excellent mechanical properties and corrosion resistance, and a method for producing the same. The magnesium alloy of the present invention can improve the corrosion resistance of the magnesium alloy by using scandium which can simultaneously prevent from microgalvanic corrosion between a substrate and impurities without deteriorating mechanical properties and improve the passivation property of the coating formed on the surface.

Abstract: Disclosed are a magnesium (Mg) alloy and a manufacturing method thereof. The Mg alloy has a composition including, by weight, 4% to 10% of Sn, 0.05% to 1.0% of Ca, 0.1% to 2% of at least one element selected from the group including Y and Er, the balance of Mg, and the other unavoidable impurities. The Mg alloy includes an Mg2Sn phase having excellent thermal stability, and is capable of being heat treated at a temperature of 480° C. or more.

Abstract: A magnesium alloy that forms a stable protective film on the surface of molten metal, having excellent ignition resistance restricting natural ignition of a chip thereof as well as having excellent strength and ductility, so that the Mg alloy can be melted and cast in the air or a common inert atmosphere. The magnesium alloy includes, by weight, 7.0% or greater but less than 11% of Al, 0.05% to 2.0% of Ca, 0.05% to 2.0% of Y, greater than 0% but not greater than 6.0% of Zn, and the balance of Mg, and the other unavoidable impurities. The total content of the Ca and the Y is equal to or greater than 0.1% but less than 2.5% of the total weight of the magnesium alloy.

Abstract: A grain refiner for a magnesium alloy according to the present invention contains aluminum (Al) and manganese (Mn), and contains a compound of aluminum (Al) and manganese (Mn) in the microstructure thereof, wherein the grain refiner is composed of a structure in which, in the compound of aluminum (Al) and manganese (Mn), the area of the compound having an Al/Mn compositional (atomic) ratio of 4-4.5 is larger than the area of the compound having an Al/Mn compositional (atomic) ratio of 5.5-6.5. When the grain refiner is added to molten magnesium, crystal grains can be refined to 50-100 ?m.

Abstract: Provided are a method of preparing a magnesium alloy extrudate and a magnesium alloy extrudate prepared thereby. Specifically, the present invention is related to a method of preparing a magnesium alloy extrudate including melting a magnesium alloy raw material (step 1), casting the magnesium alloy raw material melted in step 1 to prepare a magnesium alloy billet (step 2), homogenizing the magnesium alloy billet prepared in step 2 (step 3), applying 3% to 20% of compressive deformation to the homogenized magnesium alloy billet of step 3 (step 4), and extruding the compressive deformed magnesium alloy billet of step 4 (step 5), and a magnesium alloy extrudate prepared thereby.

Abstract: The present invention relates to a method for preparing a recycled low-nickel magnesium alloy using magnesium scraps. More particularly, the recycled magnesium alloy having a reduced nickel content can be prepared by adding Al and misch metal to molten magnesium scraps so as to form an Ni—Al-misch metal three-phase alloy or cluster thereof; and separating and removing the formed Ni—Al-misch metal three-phase alloy or the cluster thereof using gravity.

Abstract: A method for increasing formability of magnesium alloy sheet and the magnesium alloy sheet prepared by the same are provided, in which the method includes the following steps: forming {10-12} twins in magnesium alloy sheet (step 1); and annealing the magnesium alloy sheet of step 1 (step 2). The present invention also provides the magnesium alloy sheet containing {10-12} twins prepared by the method. Accordingly, the room temperature formability and the warm formability are increased by forming {10-12} twins through deformation on the magnesium alloy sheet and subsequently performing annealing, because it is possible to artificially form {10-12} twins without increasing dislocations in the magnesium alloy sheet and accommodate the deformation generated during the forming via annihilation of the twins.

Abstract: A magnesium alloy having high ductility and high toughness, and a preparation method thereof are provided, in which the magnesium alloy includes 1.0-3.5 wt % of tin, 0.05-3.0 wt % of zinc, and the balance of magnesium and inevitable impurities, and a preparation method thereof. Magnesium alloy with a relatively small tin content is added with zinc, and optionally, with one or more alloy elements selected from aluminum, manganese and rare earth metal, at a predetermined content ratio. As a result, the alloy exhibits superior ductility and moderate strength due to the suppression of excessive formation of precipitates and some precipitates hardening effect, respectively. Accordingly, compared to extruded material prepared from conventional commercial magnesium alloys, higher ductility and toughness are provided, so that the alloy can be widely applied over the entire industries including automotive and aerospace industries.

Abstract: Disclosed are a magnesium (Mg) alloy and a manufacturing method thereof. The Mg alloy has a composition including, by weight, 4% to 10% of Sn, 0.05% to 1.0% of Ca, 0.1% to 2% of at least one element selected from the group including Y and Er, the balance of Mg, and the other unavoidable impurities. The Mg alloy includes an Mg2Sn phase having excellent thermal stability, and is capable of being heat treated at a temperature of 480° C. or more.

Abstract: A magnesium alloy that forms a stable protective film on the surface of molten metal, having excellent ignition resistance restricting natural ignition of a chip thereof as well as having excellent strength and ductility, so that the Mg alloy can be melted and cast in the air or a common inert atmosphere. The magnesium alloy includes, by weight, 7.0% or greater but less than 11% of Al, 0.05% to 2.0% of Ca, 0.05% to 2.0% of Y, greater than 0% but not greater than 6.0% of Zn, and the balance of Mg, and the other unavoidable impurities. The total content of the Ca and the Y is equal to or greater than 0.1% but less than 2.5% of the total weight of the magnesium alloy.

Abstract: A magnesium alloy that has excellent ignition resistance and is excellent in both strength and ductility. The magnesium alloy includes, by weight, 1.0% or greater but less than 7.0% of Al, 0.05% to 2.0% of Ca, 0.05% to 2.0% of Y, greater than 0% but not greater than 6.0% of Zn, and the balance of Mg, and the other unavoidable impurities. The total content of the Ca and the Y is equal to or greater than 0.1% but less than 2.5% of the total weight of the magnesium alloy. The Mg alloy forms a dense composite oxide layer that acts as a protective film. Thus the Mg alloy has very excellent oxidation resistance and ignition resistance, can be melted, cast and machined in the air or a common inert atmosphere (Ar or N2), and can reduce the spontaneous ignition of chips that are accumulated during the process of machining.

Abstract: A horizontal continuous casting apparatus for continuously manufacturing a magnesium alloy plate and a method of manufacturing a magnesium alloy plate using the same. The horizontal continuous casting apparatus is structured such that the cross-sectional area of the plate is equal to or smaller than that of a melt inlet, and includes a cooling unit for indirectly cooling the melt using a cooling jacket provided to the outer wall of the mold and/or for directly cooling the melt through spraying of cooling water, and a drawing unit having a multi-step drawing cycle. Thereby, magnesium alloy plates having various sizes can be safely and continuously cast.

Abstract: A horizontal continuous casting apparatus for continuously manufacturing a magnesium alloy plate and a method of manufacturing a magnesium alloy plate using the same. The horizontal continuous casting apparatus is structured such that the cross-sectional area of the plate is equal to or smaller than that of a melt inlet, and includes a cooling unit for indirectly cooling the melt using a cooling jacket provided to the outer wall of the mold and/or for directly cooling the melt through spraying of cooling water, and a drawing unit having a multi-step drawing cycle. Thereby, magnesium alloy plates having various sizes can be safely and continuously cast.

Abstract: A magnesium-alloy plate manufactured by completely melting a magnesium-alloy material received in a hermetic type melting furnace; transferring the molten magnesium-alloy into a hermetic type heat insulation furnace through a hermetic type transfer runner; discharging the molten magnesium-alloy received in the heat insulation furnace into a recessed portion of a casting wheel through a casting runner, to which a mixed gas containing SF6 is injected by ignition-suppression gas injection tubes; and continuously casting the molten magnesium-alloy entered into the recessed portion of the casting wheel into a magnesium-alloy plate using a casting band circulating around the casting wheel while coming into contact with an upper portion of the recessed portion.

Abstract: The present invention relates to a non-combustible magnesium alloy, comprising one of elements of Al at 0.1˜3 wt %, La at 0.1˜3 wt %, Nd at 0.1˜3 wt %, or Y at 0.005˜3 wt %; 0.5˜10 wt % of Ca; and the remainder of conventional magnesium alloy. Alternatively, the present invention entails a non-combustible magnesium alloy comprising 0.005˜4 wt % of multiple additives of two or more types of elements selected from the group consisting of Al, La, Nd and Y; 0.5˜10 wt % of Ca; and the remainder of conventional magnesium alloy. The magnesium alloy of the present invention has high oxidation-resistance, which translates into high manufacturability in air or in the generally non-oxidative atmosphere (SO2, Ar, CO2, N2).

Abstract: The present invention relates to a one-body continuous casting apparatus for fabricating a rod or slab shape of phosphorized copper by means of using a horizontal continuous casting process. Such invention contemplates designing and manufacturing a one-body melting and casting machine using high or low frequency induction heating, wherein a molten metal is deoxidized and refined in the system which comprises installing the multistage graphite filters inside the melting and casting machine, so the procedure of transferring the molten metal from the melting furnace to the casting machine can be eliminated, thereby enabling the horizontal continuous casting apparatus to manufacture a phosphorized copper of high quality.