| 摘要 |
Aluminum alloy for electrically conductive products, comprises (in wt.%) silicon (0.25-0.7), iron (0.25-0.7), copper (less than 0.1), manganese (0.25-0.7), magnesium (0.25-0.7), chromium (= 0.1), zinc (= 0.1), titanium (= 0.1), aluminum (not > 0.05) and unavoidable impurities (not > 0.05), where the total amount of aluminum and unavoidable impurities is 0.15 wt.%. The difference in weights of silicon and iron, silicon and manganese, and silicon and magnesium, are = 0.1 wt.%, respectively. Independent claims are also included for: (1) a strip or sheet comprising the aluminum alloy, where the strip or sheet after a back annealing at 250[deg] C for 1-4 hours, exhibits yield strength of greater than 140 MPa and an electrical conductivity of greater than 31 MV/minute, preferably greater than 31.5 MS/minute at room temperature; and (2) producing the strip made of the aluminum alloy, comprising producing a rolling ingot made of corresponding aluminum alloy, homogenizing the rolling ingot for 2-12 hours at 550-610[deg] C, cooling the rolling ingot to 380-500[deg] C and maintaining the rolling ingot for at least 1 hour, hot rolling the rolling ingot subsequently at 280-500[deg] C, optionally subjecting to a hot strip annealing at 280-380[deg] for greater than 1 hour, and subsequently optionally cold rolling to final thickness. |
