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GRAIN REFINER AND REFINEMENT METHOD FOR MAGNESIUM ALLOY, PREPARATION METHOD FOR MAGNESIUM ALLOY USING SAME, AND MAGNESIUM ALLOY PREPARED THEREBY
GRAIN REFINER AND REFINEMENT METHOD FOR MAGNESIUM ALLOY, PREPARATION METHOD FOR MAGNESIUM ALLOY USING SAME, AND MAGNESIUM ALLOY PREPARED THEREBY
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机译:镁合金的晶粒细化和细化方法,使用相同的镁合金的制备方法以及由此制备的镁合金
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摘要
The purpose of the present invention is to provide a grain refiner and a refinement method for a magnesium alloy, a preparation method for a magnesium alloy using the same, and a magnesium alloy prepared thereby. To this end, the present invention provides a grain refinement method for a magnesium alloy and a preparation method for a magnesium alloy, the grain refinement method comprising the steps of: (step 1) coating a magnesium alloy with a protection gas, and heating and melting the same to the melting temperature of the magnesium alloy to prepare a molten magnesium alloy; adding the grain refiner for a magnesium alloy prepared by the present invention to the molten magnesium alloy prepared in step 1; and casting the molten magnesium alloy of step 2 to form a magnesium alloy cast with fine grains. According to the present invention, instead of adding a refiner having a single composition as in a conventional method, multiple types of powders showing refinement effects of different reactivities are prepared into a powder-, pellet-, rod- or wire-shape while controlling the density and mixing ratio thereof so as to be injected, thereby inducing heterogeneous nucleus generation and controlling the reactivity with a molten metal so as to maximize the refinement of a magnesium alloy, minimize the reaction concentration at an upper portion of a molten metal, and further obtain a stirring effect of the decomposition of a carbonate powder.
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