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AssigneeConstellium France
InventorsPierre Litalien, Alain Legendre, Dominique Daniel, Guy-Michel Raynaud
Estimating the term…
A method for the production of swaged aluminum alloy parts, by production of a 0.5 mm-5 mm thick alloy strip made of 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, total of <0.5, the remainder being Al, cutting a blank from the strip, locally or totally heating the blank at a temperature of 150-350° C. for <30 secs, and swaging the heated blank with the aid of heated tools, at least partially, at a temperature of 150-350° C. in the presence of a lubricant which is compatible with later operations. The swaged parts are automotive body work parts.
Process for manufacturing drawn parts made of an aluminium alloy comprising the following steps:
15-16. (canceled)
Drawn part starting from a blank with a thickness of between 0.5 and 5 mm of an alloy with composition (% by weight) Mg=1-6, Mn<1.2, Cu<1, Zn<1, Si<3, Fe<2, Cr<0.4, Zr<0.3, other elements <0.1 each and <0.5 total, the remainder being Al, comprising areas that are not deformed or slightly deformed, and areas that are highly deformed, characterised in that the yield stress R0.2 of the least deformed areas is at least 30% more than that in the most deformed areas, or the Vickers hardness Hv of the least deformed areas is at least 20% more than that in the most deformed areas.
Dependencies are inferred from the claim text.