Producing method for magnesium alloy material

B - Operations – Transporting – 22 – D

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B22D 21/04 (2006.01) B22D 11/00 (2006.01) B22D 11/06 (2006.01)

Patent

CA 2572480

The invention is to provide a magnesium alloy material such as a magnesium alloy cast material or a magnesium alloy rolled material, excellent in mechanical characteristics and surface precision, a producing method capable of stably producing such material, a magnesium alloy formed article utilizing the rolled material, and a producing method therefor. The invention provides a producing method for a magnesium alloy material, including a melting step of melting a magnesium alloy in a melting furnace to obtain a molten metal, a transfer step of transferring the molten metal from the melting furnace to a molten metal reservoir, and a casting step of supplying a movable mold with the molten metal from the molten metal reservoir, through a pouring gate, and solidifying the molten metal to continuously produce a cast material. In a process from the melting step to the casting step, parts contacted by the molten metal are formed by a low-oxygen material having an oxygen content of 20 mass% or less. The cast material is given a thickness of from 0.1 to 10 mm, thereby providing a magnesium alloy material such as a such as a magnesium alloy cast material or a magnesium alloy rolled material, excellent in mechanical characteristics and surface precision.

Mode de production d~un alliage de magnésium, avec une étape de fonte de l~alliage de magnésium dans un four de fusion pour former un alliage en fusion, une étape de transport de l~alliage en fusion depuis le four de fusion jusqu~à un récipient de stockage de l~alliage en fusion, puis une étape de moulage de l~alliage provenant du récipient de stockage dans un moule amovible via un port pour verser l~alliage en fusion, pour solidifier l~alliage en fusion et former sans interruption un article moulé, dans lequel les parties en contact avec l~alliage en fusion au cours des étapes allant de la fonte au moulage sont fabriquées à partir d~un membre fait d~un matériel à oxygène bas contenant de l~oxygène inférieur ou égal à 20 % de masse, et dont l~épaisseur de l~article moulé est comprise entre 0.1 et 10 mm ; un produit en alliage de magnésium tel qu~un produit moulé ou un produit laminé issu de la méthode indiquée ci-dessus ; et un article formé d~un alliage de magnésium utilisant le produit laminé ci-dessus et un mode de production de l~article formé. La méthode ci-dessus permet de produire un alliage de magnésium ayant des caractéristiques mécaniques et une précision de surface excellentes.

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