Method for warm swaging al-mg alloy parts

Details Method for warm swaging al-mg alloy parts Method for warm swaging al-mg alloy parts

B - Operations, Transporting

21

D

B21D 22/20 (2006.01) C22C 21/06 (2006.01)

Patent

CA 2516636

The invention relates to a method for the production of swaged aluminium alloy parts, comprising the following stages: production of a 0.5mm 5mm thick alloy strip made of the following: 1- 6 wt. % Mg, < 1.2 wt. % Mn, < 1 wt. % Cu, < 1 wt. % Zn, < 3 wt. % Si, < 2 wt. % Fe, < 0.4 wt. % Cr, Zr < 0.3, other elements < 0.1 each, making a total of < 0.5 au total, the remainder being Al; a blank is cut from said strip; local or total heating of said blank at a temperature of 150 - 350 ·C for < 30 secs; swaging of the heated blank with the aid of heated tools, at least partially, at a temperature of of 150 - 350 ·C in the presence of a lubricant which is compatible with later operations. The swaged parts are automotive body workwork parts.

L'invention a pour objet un procédé de fabrication de pièces embouties en alliage d'aluminium, comportant les étapes suivantes : la fabrication d'une bande d'épaisseur comprise entre 0,5 et 5 mm en alliage de composition (% en poids) : Mg : 1- 6, Mn < 1,2, Cu < 1, Zn < 1, Si < 3, Fe < 2, Cr < 0,4, Zr < 0,3, autres éléments < 0,1 chacun et < 0,5 au total, reste Al, la découpe d'un flan à partir de cette bande, le chauffage, local ou total, du flan à une température comprise entre 150 et 350~C et d'une durée < 30 s, l'emboutissage du flan chauffé à l'aide d'un outillage chauffé, au moins partiellement, à une température comprise entre 150 et 350~C en présence d'un lubrifiant compatible avec les opérations ultérieures. Les pièces embouties sont notamment des pièces de carrosserie automobile.

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