Aluminum alloy semi-finished product manufacturing process using recycled raw materials

Abstract

A manufacturing process for an intermediate product made of a predetermined 7000 series alloy having a target content of at least one first anti-recrystallizing element Z1 selected from the group consisting of Zr and Cr. The product is produced by the steps of: a) supplying machining scrap including at least one second 7000 series alloy having a target content of at least one second anti-recrystallizing element Z2 selected from the group consisting of Zr and Cr, in an amount greater than a maximum accepted content of Z2 in the predetermined alloy; b) conducting at least one refining step of said scrap to reduce the amount of Z2 to a value below the maximum accepted content of Z2 in the predetermined alloy; c) producing a batch of liquid metal having nominal composition, in part or in whole, from the refined scrap; and d) forming the product by casting the liquid metal.

Dependencies are inferred from the claim text.