High strength aluminum alloy sheet and method of production of same
US8016958B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2007 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Aug 1, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12993
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
High strength aluminum alloy sheet having superior surface roughening and formability suitable for home electrical appliances and automobile outer panels and other structural materials and a method of production of the same are provided. High strength aluminum alloy sheet having a chemical composition containing Mg: 2.0 to 3.3 mass %, Mn: 0.1 to 0.5 mass %, and Fe: 0.2 to 1.0 mass %, having a balance of unavoidable impurities and Al, and having an Si among the unavoidable impurities of less than 0.20 mass % and having an average circle equivalent diameter of intermetallic compounds of 1 μm or less, having an area ratio of intermetallic compounds of 1.2% or more, having an average diameter of recrystallized grains of 10 μm or less, and having a tensile strength of 220 MPa or more. This is obtained by pouring an aluminum alloy melt having the above chemical composition in a twin belt caster, continuously casting a thin slab of a thickness of 6 to 15 mm at a cooling rate at a position of ¼ the slab thickness of 50 to 200° C./sec and winding it up into a coil, then cold rolling it at a cold reduction of 60 to 98%, final annealing it by a continuous annealing furnace at a heating rate o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.