Castable magnesium alloys

C - Chemistry – Metallurgy – 22 – C

Patent

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C22C 23/06 (2006.01)

Patent

CA 2508079

This invention relates to magnesium-based alloys particularly suitable for casting applications where good mechanical properties at room and at elevated temperatures are required. The alloys contain: 2 to 4.5 % by weight of neodymium; 0.2 to 7.0 % of at least one rare earth metal of atomic No. 62 to 71; up to 1.3 % by weight of zinc; and 0.2 to 0.7 % by weight of zirconium; optionally with one or more other minor component. They are resistant to corrosion, show good age-hardening behaviour, and are also suitable for extrusion and wrought alloy applications.

L'invention concerne des alliages à base de magnésium convenant notamment à des applications de coulage dans lesquelles de bonnes propriétés mécaniques sont requises à température de laboratoire et à température élevée. Les alliages contiennent 2 à 4,5 % en poids de néodyme; 0,2 à 7,0 % d'au moins un métal des terres rares à nombre atomique compris entre 62 et 71; jusqu'à 1,3 % en poids de zinc; et 0,2 à 0,7 % en poids de zirconium; éventuellement avec un ou plusieurs autres composants mineurs. Ces alliages sont résistants à la corrosion, présentent un bon durcissement structural, et conviennent également à des applications d'alliages d'extrusion et de corroyage.

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