Magnesium base alloy tube and method for manufacture thereof

C - Chemistry – Metallurgy – 22 – C

Patent

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Details

C22C 23/00 (2006.01) B21C 1/00 (2006.01) B21C 1/24 (2006.01) B21C 5/00 (2006.01) B21C 9/00 (2006.01) C22C 23/02 (2006.01) C22C 23/04 (2006.01) C22F 1/06 (2006.01)

Patent

CA 2464442

A magnesium base alloy tube which comprises (1) 0.1 to 12.0 mass % of Al or (2) 1.0 to 10.0 mass % of Zn and 0.1 to 2.0 mass % of Zr, and has been manufactured through drawing; and a method for manufacturing the magnesium base alloy tube which comprises a step of providing a base material tube having the above-mentioned chemical composition, a pointing step of subjecting the base material tube to pointing, and a drawing step of drawing the resultant pointed base material tube, wherein the drawing step is carried out with a drawing temperature of 50~C or higher. The magnesium base alloy tube is excellent in strength or toughness.

Cette invention porte sur un tube en alliage à base de magnésium comprenant (1) entre 0,1 et 12,0 % en masse de Al ou (2) entre 1,0 et 10,0 % en masse de Zn et entre 0,1 et 2,0 % en masse de Zr, lequel tube a été fabriqué par étirage, et porte également sur un procédé de fabrication de ce tube en alliage à base de magnésium consistant : à utiliser un tube en matériau de base présentant la composition chimique susmentionnée ; à soumettre le tube en matériau de base à un procédé d'appointage ; et à soumettre le tube de matériau de base pointé ainsi obtenu à un procédé d'étirage, l'étape d'étirage étant effectuée à une température d'étirage égale ou supérieure à 50 ·C. Ce tube en alliage à base de magnésium présente d'excellentes propriétés de résistance et de dureté.

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