| 摘要 |
The invention relates to a weldable, high-strength aluminium alloy rolled product containing the elements, in weight percent, Si 0.8 to 1.3, Cu 0.2 to 0.45, Mn 0.5 to 1.1, Mg 0.45 to 1.0, Fe 0.01 to 0.3, Zr < 0.25, Cr < 0.25, Zn < 0.35, Ti < 0.25, V < 0.25, others each < 0.05 and total < 0.15, balance aluminium, and further with the proviso that the weight percent of "available Si" is in the range of 0.86 to 1.15, preferably in the range of 0.86 to 1.05. The weight percentage ("wt.%") of "available Si" is calculated according to the equation:-<BR> wt.% Si(available) = wt.% Si - (wt.% Fe + wt.% Mn)/6 The alloy may be processed by homogenising, hot rolling, optionally cold rolling, solution heat treating and quenching, followed by either natural or artificial ageing. The alloy may have a single or multiple cladding layer thereon, e.g. 1xxx, 4xxx, 6xxx or 7xxx or series alloys. |
