| 摘要 |
A method of producing an aluminum product comprising providing stock including an aluminum alloy comprising about 4.0 to 4.4 wt. % copper, about 1.25 to 1.5 wt. % magnesium, about 0.35 to 0.5 wt. % manganese, not more than 0.12 wt. % silicon, not more than 0.08 wt. % iron, not more than 0.06 wt. % titanium, the remainder substantially aluminum, incidental elements and impurities; hot working the stock; annealing at 725-875 DEG F.; cold rolling; solution heat treating; cooling; holding for at least 12 hours at room temperature; and cold working from about 4% to 7% thereby producing a product having increased strength and toughness properties. |
