| 摘要 |
A method of producing an aluminium alloy having superplastic properties, including the steps of: heating the aluminium alloy; hot rolling to an exit temperature ranging from about 650 to 70 DEG F (343 to 21 DEG C); and cold rolling to a gauge corresponding to a percentage of cold work falling within the zone defined by the lines joining the points of A (350 DEG F, 177 DEG C; 10%), B (600 DEG F, 316 DEG C; 99%), C (70 DEG F, 21 DEG C; 99%) and D (70 DEG F, 21 DEG C; 10%), shown in Fig. 2, showing the relationship between the temperature range of the hot rolling exit temperature and the percent of cold work. In another method, a heat-treatable aluminium alloy is held after an initial hot rolling at a temperature and time period sufficient to create precipitates of intermetallic constituents having a diameter ranging from about 0.5 to 10 mu m, hot rolled as above and then cold rolled as above but to a gauge corresponding to a percentage of cold work falling within the zone defined by points A (475 DEG C, 246 DEG C; 10%), B (650 DEG F, 343 DEG C; 99%), C (70 DEG F, 21 DEG C; 99%) and D (70 DEG F, 21 DEG C; 10%). <IMAGE> |
