Aluminum alloy semi-finished product manufacturing process using recycled raw materials
US6293990A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2000 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Jan 10, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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: PA1 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; PA1 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; PA1 c) producing a batch of liquid metal having nominal composition, in part or in whole, from the refined scrap; and PA1 d) forming the product by casting the liquid metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.