Method For Producing A Solidified Lightweight Aluminium Or Magnesium Alloy

Abstract: The lightweight aluminium or magnesium alloy comprises aluminium or magnesium and one or more alloying elements, including dispersoid forming elements increasing the liquidus temperature of the alloy. The alloy is ejected in a molten state from at least one nozzle (5) and is rapidly solidified. The lightweight alloy is produced from at least one lightweight metal based composition (3) that comprises predominantly aluminium or magnesium. This composition is heated, in a first heating step, to a first temperature which is lower than the liquidus temperature of the alloy to produce a melt (31) of said lightweight metal based composition which is supplied through a piping (4) to the nozzle (5). In the piping (4) the lightweight alloy melt (30) is further heated to have a second temperature which is preferably higher than the liquidus temperature of the alloy. The first temperature can be kept sufficiently low to reduce the tendency of magnesium to oxidize or even explode and to avoid problems of aluminium oxidation and hydrogen gas formation without having to use a vacuum or an inert or reducing atmosphere whilst the second temperature may be higher to dissolve all of the alloying elements since no air or water vapour is present in the piping (4) leading to the nozzle (5).

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