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: Disclosed is a copper alloy having high electrical conductivity of at least 70% IACS and a broad solid-liquid two-phase region, capable of being easily subjected to a semi-solid forming process even at various temperatures. The copper alloy is suitable for use in a rotor of small- and medium-sized electric motors. In addition, the prevent invention provides a method of manufacturing the copper alloy for semi-solid forming, including the step of melting a copper-calcium alloy having 0.1-1.5 wt % of calcium and the balance of copper at 1100-1150° C. to form a molten copper-calcium alloy, which is then maintained at 1100-1150° C. for a predetermined time period. Then, the molten copper-calcium alloy is poured into a mold preheated to 100-150° C. and cast to a copper alloy ingot.

Abstract: A manufacturing method for the production of aluminum-lithium alloys at low cost is disclosed which includes enclosing lithium with aluminum by means of a cold extrusion of pure lithium and melting the aluminum-sealed lithium ingots in an ambient atmospheric condition. The extrusion process can be simply performed in air as well as in an inert atmosphere at room temperature. The atmospheric melting of aluminum-lithium alloys is performed by immersing and agitating aluminum-sealed lithium ingots beneath the surface of molten aluminum with a graphite plunger.