High-ductility aluminium alloy part cast under pressure

Details High-ductility aluminium alloy part cast under pressure High-ductility aluminium alloy part cast under pressure

C - Chemistry, Metallurgy

22

C

C22C 21/04 (2006.01)

Patent

CA 2452479

The invention concerns a safety or structural part cast under pressure made of high-ductility aluminium alloy consisting of (in wt. %): Si 2-6; Mg < 0.40; Cu < 0.30; Zn < 0.30; Fe < 0.50; Ti < 0.30, at least an element for reducing adherence on the mould such as Mn (0.3-2%), Cr (0.1-0.3), Co (0.1-0.3), V (0.1-0.3) and Mo (0.1-0.4), and at least an element modifying eutectics, such as Sr (50-500 ppm), Na (20-100 ppm) and Ca (30-120 ppm); other elements < 0.05 each and < 0.10 in total, the balance being aluminium exhibiting, after T5 tempering at a temperature less than 220 ·C, a yield strength R¿p0.2? > 110 MPa and an elongation A > 10 %.

L'invention a pour objet une pièce de sécurité ou de structure coulée sous pression en alliage d'aluminium ductile de composition (% en poids) : Si : 2-6 Mg <l 0,40 Cu < 0,30 Zn < 0,30 Fe < 0,50 Ti <lt; 0,30, au moins un élément destine a réduire le collage sur le moule tel que Mn (0,3-2%), Cr (0,1-0,3), Co (0,1-0,3), V (0,1-0,3) et Mo (0,1-0,4), et au moins un élément modificateur de l'eutectique, tel que Sr (50-500 ppm), Na (20 -100 ppm) et Ca (30-120 ppm), autres éléments < 0,05 chacun et < 0,10 au total, reste aluminium. présentant, après un revenu T5 a une température inférieure a 220 ~C, une limite d'élasticité RpO,2 ~ 110 MPa et un allongement A > 10%.

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