Abstract:
PROBLEM TO BE SOLVED: To provide a magnesium mother alloy, a manufacturing method thereof, a metal alloy using the same, and a method of manufacturing the metal alloy, in particular, to provide a magnesium mother alloy with improved oxidation and ignition properties, and a manufacturing method thereof, and also, to provide a metal alloy with low cost that is suitable for design purposes using the magnesium mother alloy, and the method of manufacturing the metal alloy. SOLUTION: The magnesium mother alloy includes a plurality of magnesium grains, and a scandium compound dissolved in the magnesium grains, or a scandium compound crystallized at grain boundaries which are not inside but outside the magnesium grains. Also, the metal alloy suitable for design purposes is manufactured at a low cost by adding the magnesium mother alloy containing scandium into a magnesium alloy or an aluminum alloy. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a desulfurizing agent which has improved oxidation resistance, ignition resistance and productivity, and to provide a method for producing the same. SOLUTION: The desulfurizing agent includes: a plurality of magnesium-aluminum alloy crystal grains with grain boundaries, and a compound which is formed from at least one of magnesium and aluminum and at least one selected from alkaline metals and alkaline earth metals, and exists in the grain boundaries that are not in the inside of but the outside of the magnesium-aluminum alloy crystal grains. The desulfurizing agent has a structure in which the particles of the desulfurizing agent are densely formed, thereby reduces the oxidizability of magnesium, raises an ignition temperature, reacts with sulfur in molten pig iron instead of reacting with oxygen in the atmosphere and can enhance desulfurization efficiency. COPYRIGHT: (C)2011,JPO&INPIT