Method for manufacturing bent article using aluminum alloy
US10900108B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2018 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Mar 28, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C21/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for manufacturing a bent article using an aluminum alloy with high strength and excellent corrosion resistance comprises: extruding a cast billet of an aluminum alloy including, by mass, 6.0 to 8.0% Zn, 1.50 to 3.50% Mg, 0.20 to 1.50% Cu, 0.10 to 0.25% Zr, 0.005 to 0.05% Ti, 0.3% or less Mn, 0.25% or less Sr, and the balance Al with inevitable impurities to obtain an extruded material; cooling the extruded material at an average rate of 500° C./min or less immediately after the extrusion processing; subjecting the cooled extruded material to preliminary heating treatment at a temperature within a range of 140 to 260° C. for 30 to 120 seconds within a predetermined time after the extrusion processing; bending the extruded material having undergone the preliminary heating treatment to obtain a bent article; and subjecting the bent article to artificial aging treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.